LU102192B1 - Recording arrangement and method comprising a filter unit for receiving gas from a medical device - Google Patents

Abstract

The invention relates to a receiving arrangement (100) and a method for receiving gas from a medical device (1). The receiving arrangement comprises a supply line (6), a discharge line (8), a filter unit (4) with a filter and at least one buffer store. The supply line (6) establishes a fluid connection between the medical device (1) and the filter unit (4). The discharge line (8) establishes a fluid connection between the filter unit (4) and a fluid receptacle (7). The gas is expelled from the medical device (1) and conducted through the supply line (6) to the filter unit (4) and from there through the discharge line (8) to the fluid receptacle (7). The filter filters out at least one gas component from the gas that is passed through the filter unit (4). The or each buffer store is able to temporarily absorb gas and release it again.

Description

Recording arrangement and procedure comprising a filter unit 4192192 for recording gas from a medical device

Description

The invention relates to a receiving arrangement capable of receiving gas from a medical device, in particular from a

Anesthesia device. The invention further relates to a method for collecting gas from a medical device using such a collection arrangement.

In one application of the admission arrangement and procedure, the medical device is an anesthesia machine connected to a patient, creating a ventilation circuit. The anesthesia machine is supplied with the necessary gases and, in turn, supplies the patient with breathing air enriched with at least one anesthetic agent, so that the patient is fully or at least partially sedated. Typically, the anesthesia machine performs breaths, with each breath delivering a specific amount of gas to the patient. The air exhaled by the patient returns to the medical device, which filters carbon dioxide from the exhaled air.

Often, more gas is supplied to the respiratory circuit than is removed. In this case, excess gas accumulates in the respiratory circuit.

This excess gas must be removed from the respiratory circuit.

Of course, the patient should not be endangered.

The invention is based on the objective of providing a recording arrangement and a

Methods for capturing gas from a medical device that perform better than known methods for capturing gas.

Execute orders and procedures. 20201023LU 04.11.2020

The task is performed by a recording arrangement with the characteristics of LU102192.

Claim 1 and by a method comprising the features of claim 31. Advantageous embodiments are specified in the dependent claims.

Advantageous embodiments of the recording arrangement according to the invention are, insofar as they are useful, also advantages of the method according to the invention and vice versa.

The receiving arrangement according to the invention comprises a feed line and a discharge line. The feed line can be connected to the medical device, preferably detachably, and is designed to be, according to

Establishing the connection involves creating at least one fluid connection between the medical device and the recording setup. The...

The discharge line can be connected to a fluid intake, preferably detachably, and is designed to allow at least one fluid connection between the fluid intake and the intake after the connection has been made.

To create an arrangement, the fluid intake can be stationary or mobile and functions as a sink for fluid. The .

Fluid intake can also be a spatially separated intake outside a building. Alternatively, the discharge line leads into the surrounding environment.

The recording arrangement according to the invention further comprises a

Filter unit. The filter unit includes at least one filter.

Each filter in the filter unit is designed to filter out at least one gas component from a gas that passes through it. The design and properties of the filter determine which gas component or components the filter removes.

Preferably, the filter is able to filter out at least one anesthetic agent from the gas, i.e., the gas or a gas component is an anesthetic agent.

The intake arrangement is designed to perform the following function: Gas that is expelled or extracted from the medical device, or that otherwise escapes from the device, is captured by the

A feed line leads to and through the filter unit, the filter unit comprising a filter. At least a portion of this gas, preferably all of it, is passed through the filter.

-3/80- i filters out the gas component LU102192, or at least one component, from the gas, at least partially, preferably completely. The filtered gas is then...

Filter unit through the discharge line to the fluid intake or into the

guided environment.

The inventive method is performed using such a

The intake arrangement is carried out and comprises the following steps: . — At least one fluid connection is established between the medical device and the supply line. . — At least one further fluid connection is established between the discharge line and the fluid intake. Alternatively, the discharge line is or is routed to the environment. . — Gas escapes from the medical device. In particular, the medical device emits this gas, and/or this gas is extracted from the medical device. The escaped gas enters the

Supply line. ë — The intake arrangement directs the escaped gas through the

through the supply line, the filter unit and the discharge line to the

Fluid intake: — While this gas is passed through the filter unit, at least a portion of this gas, preferably at least temporarily all of the gas, flows through the filter of the filter unit. — The filter removes the gas component, or at least one, from the gas flowing through it, in particular at least one anesthetic. Therefore, gas entering the discharge line has been completely or at least partially filtered out from the gas component, or at least one of the gas components.

The receiving arrangement according to the invention further comprises at least one buffer storage device, wherein the buffer storage device or devices are at least temporarily in a fluid connection with the supply line, at least temporarily in a fluid connection with the discharge line, or at least temporarily both with the supply line and with the discharge line. (20201023LU 04.11.2020)

Fluid connection is established. The method according to the invention is carried out using LU102192 at least one such buffer storage tank.

The recording arrangement according to the invention and the inventive

On the one hand, these methods reduce the risk of gas containing an unwanted substance.

A gas component leaks into the environment surrounding the medical device.

In particular, the recording arrangement and the method according to the invention reduce the risk of an anesthetic entering the

ambient air escapes and the leaked anesthetic may endanger persons who are near the medical device and/or near the artificially ventilated patient, especially persons who are in a

Working in a hospital is at risk to one's health. This effect is achieved in particular by the fact that the inventive collection arrangement and the inventive method direct the gas escaping from the medical device into the fluid collection chamber. This completely or at least to a certain extent prevents the emitted gas from escaping into the environment of the medical device.

In one application, the fluid intake is a stationary fluid intake and is particularly part of a building's stationary infrastructure. In this application, the intake arrangement and method according to the invention reduce the risk of a gas containing an undesired gas component entering a stationary fluid intake via the fluid intake.

The infrastructure system, to which the stationary fluid intake is connected, is particularly relevant in an infrastructure system within a hospital.

This infrastructure system could separate the gas from the unwanted gas-

The component could be released back into a medical device, which is often undesirable, or this gas could be emitted into the environment, potentially leading to environmental pollution. This undesirable effect is particularly likely due to the

Filter unit with filter prevents this. A filter such as this can be used as part of the filter unit, which prevents the or at least one specified gas.

able to filter out a component from a gas, while the gas passes through the

The filter is being routed. 20201023LU 04.11.2020

It is also possible that the fluid absorption absorbed gas via the -U102192

The exhaust line leads to the vicinity of an exhaust system, and the exhaust system draws in and collects the gas from a closed, partially, or fully open space. In this application, the exhaust line is not necessarily connected to a stationary fluid collection system. Even in this application, the invention prevents unwanted gas components from escaping into the environment.

According to the invention, the recording arrangement additionally comprises a

Buffer storage. This buffer storage is located in at least one .

Fluid connection with the supply line and on the other hand in at least one ;

Fluid connection with the discharge line. This buffer storage tank is particularly capable of temporarily absorbing and storing gas that has been expelled from the medical device or has escaped onto other surfaces.

This occurs when the stationary fluid reservoir is currently unable to fully absorb the gas. The buffer storage tank reduces the risk of a backflow of emitted gas in this case.

Backflow can affect the medical device and endanger a patient connected to the device and/or damage the medical device. A large backflow could also cause

The fluid connection of the recording arrangement may become leaky, for example due to overpressure.

If more gas escapes from the medical device and enters the supply line than the return line can accommodate, gas is directed to the buffer tank, preferably from the supply line. If less gas escapes than the return line can accommodate, gas is drawn back from the buffer tank.

The excess fluid is extracted from the buffer storage and preferably directed into the discharge line.

In many cases it is necessary to replace the filter from time to time, especially if the filter has become clogged after prolonged use.

Often, artificial ventilation of the patient must or should be continued while the filter or the entire filter unit is replaced.

In this case too, it should be avoided that a large quantity of excess gas escapes into the environment. In particular, even when replacing the filter on 20201023LU on 04.11.2020, it should be avoided that a large quantity of LU102192 escapes.

Anesthetic agent escapes into the environment. The buffer storage device according to the invention also absorbs at least a portion of the excess gas in this case, ideally all of the excess gas.

A "filter" within the meaning of the claims is understood to be a component that is capable of receiving at least one gas component from a gas mixture while this gas mixture flows through the filter. The filter can

Bind the gas component itself, for example with activated carbon or because the filter

It contains zeolites. The filter can also break down the gas component chemically or thermally. The filter can also work mechanically and, for example, include a molecular sieve.

A “conduit” within the meaning of the claims is a fluid guidance unit which has two .

The point connects fluid-tight and therefore also gas-tight. The line can be flexible, especially a hose, or rigid, especially a [missing information].

A tube. A conduit as defined by the requirements can also be a fluid-dense one.

It should be a coupling point that connects the filter unit to another device in a detachable way.

A buffer tank is a component that includes a wall which has a .

surrounds a cavity. The buffer storage tank is able to absorb gas in this cavity. The wall can be rigid or elastic, so that the volume of the cavity is either constant or dependent on the difference between the

The pressure inside the cavity and the external pressure on the cavity are changed.

According to the invention, the filter unit comprises a filter. Preferably, the

The filter unit also includes a filter holder. The filter is inserted into the filter holder or can be inserted into and preferably removed from the filter holder. The filter holder is located in each of

Fluid connection with the supply line and the discharge line. The one used

In one embodiment, the filter can be removed from the filter holder, for example, to be replaced by a new or different filter (filter with different filter properties). According to a preferred embodiment, the filter can be inserted into the filter holder and later removed from it. This makes it possible to replace a filter when it is damaged by the gas or a gas- LU102192

a component of the escaping gas has absorbed such a quantity that the filter can no longer fulfill its desired filtering effect at all or to a sufficient degree, and/or if the filter has become clogged.

Thanks to the filter housing, it is not necessary to temporarily disconnect and later reconnect the fluid connection between the supply and discharge lines. This allows a used filter to be quickly replaced with a new one. The risk of errors when initially or subsequently reconnecting the fluid connection is reduced. Furthermore, it is possible to use the same

The inventive arrangement can be used sequentially with different filters to filter out different gas components from a gas, and/or the inventive arrangement can be used under different environmental conditions. This feature also facilitates the use of several inventive arrangements according to the invention for different applications.

Uses, especially for filtering out different gases.

Components to provide. These =—inventive = recording-

Arrangements only need to be distinguished by their different designs.

Filters must be distinguished. The other components of the recording setup may be the same.

In the embodiment with the filter holder, the invention comprises

The procedure includes the following additional steps: — If not already done, a filter is inserted into the filter holder, — The holder assembly directs the gas that has escaped from the medical device through the supply line, the filter holder, and the

The gas flows through the discharge line to the fluid intake or into the environment. — The intake arrangement directs the gas through the filter intake in such a way that at least a portion of this gas, preferably all of the gas, flows through the filter, which is inserted into the filter intake.

Alternatively, the filter forms an integral part of the filter unit, and the entire filter unit is a single component. Preferably, the...

Connect the inlet and outlet lines to the filter unit, preferably using a detachable connection (see 20201023LU 04.11.2020 A). If the filter is exhausted and no further LV102192 is available...

If the filter is unable to absorb the quantity of the gas component, or if the filter is clogged, the filter unit is disconnected from the supply and discharge lines; and a new filter unit is connected to the supply and discharge lines.

A configuration was described above in which the .

The filter unit comprises a filter holder and at least one filter. The filter(s) can be inserted into and removed from the filter holder.

Remove the filter holder, for example to replace the filter with a new one.

To replace filters. In a preferred further development, the filter unit also includes a filter sensor. This filter sensor is able to automatically determine whether a filter is inserted into the filter holder or not.

Preferably, the filter sensor generates a message if no filter is inserted in the filter holder for a period longer than a predefined time interval. In a variation, the filter sensor only generates a message if...

A notification is triggered if no filter is installed for a period longer than the specified time and gas is also flowing through the supply line. The configuration with the

The filter sensor reduces the risk of unintentionally not inserting a filter.

A filter holder is used and therefore no gas component can be filtered out.

Preferably, the buffer storage tank is not only connected to the supply line and the discharge line in separate fluid connections, but also in a

Fluid connection with the environment, either permanently or at least under a large pressure differential. This further reduces the risk of a backflow occurring when a large quantity of gas has been emitted by the medical device, if neither the stationary...

Neither the fluid absorption capacity nor the buffer storage tank can fully absorb this quantity. While it is undesirable for gas to escape into the environment, a gas leak is usually less harmful than a

Backflow of this gas. The design, in which the buffer storage tank is located in a

A fluid connection with the environment is particularly advantageous if the buffer storage is rigid, i.e., its volume is not variable.

In one configuration, the filter unit comprises several filters. The recording- LU102192

The arrangement is designed so that gas flows through the supply line, through one of these filters, and through the exhaust line. One filter is therefore located in the '

Flow path from the supply line to the discharge line. At least one additional filter is located in a reserve position.

In one implementation, the filter unit comprises a receiving unit, in particular a turret-style receiving unit, for at least two filters. This...

The intake unit is movable relative to the supply line and relative to the discharge line. In another implementation, the filter unit comprises an Ë

Diverter valve that directs the gas flowing from the supply line either to the first filter or to the second filter.

In an application of the configuration with multiple filters, all filters of the .

Filter units are designed in the same way and are particularly capable of the same;

to filter out the gas component. If a filter is used up or clogged, the intake unit will be adjusted relative to the supply line and relative to the

The discharge pipe is moved so that the gas flows through a new filter.

For example, the filter unit includes a drive for the recording unit.

In another implementation form, a first filter in the

The intake unit filters out a first gas component, a second filter a second gas component, and optionally a third filter the first, the second, or a third gas component. The three gas components differ chemically and/or mechanically from one another. Depending on the desired or required application, the first filter or the second is used.

The filter, or the optional third filter, is moved into the flow path from the supply line to the discharge line. Preferably, the filter unit comprises a

Selection unit, with the help of which a user can select a gas to be filtered out

component can be selected.

Various designs of the buffer storage system are possible, and at least some of these designs can be combined with each other.

It is therefore possible that the recording arrangement according to the invention has exactly one

buffer storage or at least two similar or at least two different buffer storage systems.

In one previously mentioned configuration, the filter unit includes a LU102192.

Filter holder into which a filter can be inserted or is inserted. In a

Further development of this design is the space which is provided by the

The filter holder is enclosed in at least one direction larger than the |.

Filter — more precisely: Between at least one inner wall of the

There is a gap between the filter housing and the opposite outer wall of the filter. It is possible that this gap is located at two points.

adjacent to the outer walls of the filter, e.g. to the outer surface and to a

Frontal surface, or even just an outer wall, e.g., just the mantle surface.

This space is connected to the supply line and the discharge line via fluid and forms a buffer reservoir or is part of the buffer reservoir. Preferably, this space occupies at least 10%, more preferably at least 20%, and particularly preferably at least 30% of the space surrounded by the filter housing.

The design with the gap takes up particularly little space compared to other possible designs of the buffer tank and is mechanically robust. Furthermore, the gap facilitates installation in some cases.

Designs allow a person to grasp the filter in the space and remove it from the filter holder.

During periods when no filter is inserted into the filter housing, the entire interior of the filter housing often serves as a buffer storage area.

Available. In the design just described, this interior space is larger than if the filter housing completely encloses the filter, and is therefore able to hold more gas. Consequently, often only a relatively small amount of gas that has leaked from the medical device enters the

environment, although no filter is used and the filter intake is therefore limited;

The environment is open. This desired situation occurs particularly when the filter housing is open at the top and the gas is heavier than air.

Most anesthetics are heavier than air.

In the configuration with the filter housing that encloses a cavity, the cavity of the buffer storage tank is preferably separated from the cavity to the... 20201023LU 04.11.2020

The filter is spatially separated and preferably isolated, in particular 41092192, fluid-tightly separated.

In another embodiment, the buffer storage tank comprises a housing which encloses a cavity and, in one embodiment, a rigid

The housing is, in another embodiment, an elastic housing, and in a third embodiment, a housing with at least one rigid area and at least one elastic area. This housing is connected to the supply line and the discharge line via at least one fluid connection (A).

The design with the buffer storage unit, which includes a housing, can also be combined with a design in which the filter unit forms a single component. In one embodiment, this housing of the buffer storage unit is additionally in at least one fluid connection with the filter unit, and the

Fluid connection exists between the housing and the supply line and/or passes through the filter unit.

Preferably, several metal sheets or other suitable guide elements are installed in the interior enclosed by the housing of the buffer storage tank, providing a preferably meandering path through the housing. This design allows the housing to be installed in a

Fluid contact with the environment exists and yet only a relatively small

The amount of gas escaping from the casing into the environment. The meandering

This path results in gas passing slowly through the interior of the housing.

In one embodiment, this housing is in fluid communication with the

environment, so that excess gas can escape into the environment. If a meandering path forms in the housing, this often occurs despite the /

The fluid compound releases relatively little gas into the environment.

In both configurations, the buffer storage is preferably designed to operate according to the 'Lastin — FirstOut' principle.

In one embodiment, the housing of the buffer storage tank is arranged vertically or at an angle below the filter unit and is preferably located in a

Fluid connection with the filter unit. This design is particularly advantageous when a gas containing the gas component to be filtered out is heavier than air and therefore sinks to the bottom of the filter unit. Most LU102192

Anesthetics are heavier than air.

In one embodiment, the housing of the buffer storage tank is located downstream of the

The filter unit is arranged. In an alternative embodiment, the filter unit is arranged downstream of the buffer storage housing.

The term "downstream" refers to a flow direction of fluid from the

Supply line to the discharge line. These two configurations result in a smaller vertical extent of the inventive intake-

Arrangement compared with other possible configurations.

It is possible that there is a problem both between the filter used and the

Filter mounting creates an intermediate space as well as a separate housing of the

Buffer storage below or downstream or upstream of the

The filter unit is arranged. This design makes it possible to provide a particularly large buffer storage capacity.

As already mentioned, in one configuration the filter unit includes a

Filter holder into which a filter can be inserted or is already inserted. In a further development of this design, a plate is inserted into the filter holder. This plate divides the interior of the filter holder into a

Filter cavity designed to accommodate the filter, and a

Buffer storage cavity that belongs to or forms a buffer storage tank. At least when no filter is installed in the

With the filter housing installed, this buffer storage cavity is in fluid connection with the supply line on the one hand and in a

Fluid connection with the discharge line.

The plate reduces the risk of gas from the fluid intake entering the

The environment is affected, even when no filter is inserted in the filter housing. This design, with the plate in the filter housing, also saves space compared to other possible buffer storage designs. It eliminates the need for a separate housing for the buffer storage.

In one embodiment, the buffer storage cavity is located below the

Filter cavity. This design is particularly advantageous if, as of 20201023LU 04.11.2020, a gas containing the gas component to be filtered out is heavier than air and therefore sinks downwards in the filter housing.

In one embodiment, the plate can be moved back and forth between a park position and a buffer storage position relative to the filter holder.

When a filter is inserted into the filter holder, the plate is in the

Park position, otherwise in the buffer storage position. The feed line includes at least one outlet opening, preferably located inside the

The filter housing is arranged. The discharge line includes at least one

Inlet opening, which is preferably located inside the filter holder.

When the disk is in the buffer storage position, according to this

The following situation is created by the design: — The outlet or a discharge sinus connects the supply line to the

Buffer storage cavity. — An inlet opening connects the buffer storage cavity to the

Discharge line. — This means that the buffer storage cavity is in fluid contact with both the supply line and the discharge line. — In one embodiment, the plate seals the buffer storage cavity largely fluid-tight against the environment and against the filter cavity.

When the plate is in the park position, the following situation is created according to this design: — The or an outlet opening connects the supply line to the filter-

Cavity. — The or an inlet opening connects the drain line to the filter.

Cavity. — This means that the filter cavity, and also a correctly installed filter, is in fluid contact with both the supply line and the discharge line. — In one embodiment, the plate separates the two in the parked position.

Openings which connect the supply line or the discharge line to the filter-

Use a cavity, fluid-tight from the buffer storage cavity. 20201023LU 04.11.2020

— In another version, it is also available when the plate is in the park- LU102192

The position is to place the supply line and/or the discharge line in a

Fluid connection with the buffer storage cavity.

When the disk is in the buffer storage position, the buffer storage-

The cavity provides a buffer storage area inside the filter housing.

Buffer storage can therefore then store excess gas from the medical

The device will not accept the filter if no filter is currently inserted. This situation occurs particularly when the filter is being replaced in the filter holder.

The plate in the buffer storage position separates the buffer storage cavity from the environment and reduces the amount of gas that escapes into the environment.

Thanks to the movable plate, no additional mechanism is needed to achieve the desired filtration and, conversely, prevent gas from escaping into the environment. The plate allows for a simple mechanical design.

In one embodiment, the filter unit is designed such that when a

The filter is inserted into the filter holder, the plate from the buffer storage

The position is moved to the park position. When the filter is moved out of the

When the filter holder is removed, the plate is moved from the park position back into the buffer storage position. For example, a mechanical or pneumatic spring tends to move the plate into the buffer storage position and hold it there.

In one embodiment, the filter unit is designed such that a movement of the plate from the park position to the buffer storage position removes the filter from the

pushes out the filter holder.

In one embodiment, the plate is connected to an actuating element, which can preferably be operated manually to move the plate back and forth between the two positions. For example, a filter is inserted into the

The filter holder is inserted, and then the actuator is activated to move the plate into the park position. This also activates the

Filter fully inserted into the filter holder. To remove the filter, the actuator is pressed again, moving the plate into position 20201023LU 04.11.2020

TTS EEE Eee

Buffer storage position. This pushes the filter out of the filter holder Lu102192.

In a further embodiment, a drive unit is able to move the plate back and forth between the two positions. The drive unit can preferably be controlled and/or activated externally.

Preferably, the plate locks into at least one end position.

Preferably, the parking cavity is smaller than the buffer storage cavity.

This design therefore saves space compared to other possible designs of the buffer storage.

In one implementation, a manually operated actuating element or a drive is connected to the plate and moves the plate from one side to the other.

In a preferred embodiment, inserting and removing the filter causes the plate to move from one position to the other, thereby directing the flow of gas through the filter cavity or the buffer storage cavity. This design eliminates the need for a separate actuating element or drive. A locking mechanism can hold the plate in a specific position.

Preferably, the plate is spring-mounted in the filter holder. At least one

The spring element tends to move the plate into the buffer storage position, particularly upwards. An inserted filter moves the plate against the spring force into the park position, preferably due to its own...

Weight; this design eliminates the need for a

To provide an actuating element and/or an action and/or a drive to move the plate from one position to another. Rather, the plate is automatically moved upon insertion and during

Released from one position to the other. It is also possible that a locking connection or a detent holds the plate in the parked position. According to the embodiment just described, a plate inside the filter housing separates a filter cavity from a buffer storage cavity, in a fluid-tight configuration. In a further development of this fluid-tight j 20201023LU 04.11.2020

- 16 / 80 -

The design also includes an LU102192 inside the filter holder.

A slider, preferably mechanically connected to the plate. Also the

The slider can be switched between a park position and a buffer storage position.

Move the position back and forth, preferably together with the plate.

The supply line comprises two spatially separated

Outlet openings, namely a filter outlet opening and a buffer storage opening

Outlet opening. The discharge pipe also includes two spatially separated inlet openings, namely a filter inlet opening and a

Buffer tank inlet opening.

When the plate and the slider are in the park position, then the

The feed line is connected to the filter cavity via the filter outlet opening.

The discharge line is connected to the filter cavity via the filter inlet opening. The slide valve blocks the buffer tank outlet opening and the

Buffer tank inlet opening. Gas escaping from the supply line passes through the filter cavity and thus through the filter into the

The exhaust line is routed. The slide in the park position prevents gas from bypassing the filter in the filter housing and from the supply line through the

The buffer storage cavity flows directly into the discharge pipe.

When the plate and the slider are in the buffer storage position, then the

Supply line via the buffer storage outlet opening with the buffer storage-

cavity connected. The discharge line is connected via the buffer storage tank.

The inlet opening is connected to the buffer storage cavity. The slide valve blocks the filter outlet and inlet openings. Gas escaping from the supply line is routed through the buffer storage cavity into the exhaust line. In the buffer storage position, the slide valve prevents gas from escaping the supply or exhaust lines and entering the filter cavity, from where it can then be released into the environment. This also applies in this case.

The implementation form separates the disk in the buffer memory position.

Buffer storage cavity from the filter cavity, preferably fluid-tight.

The embodiment just described, with the plate and the slide, leads to a particularly simple mechanical implementation. It is possible that a manually operated actuating element and/or a drive can move the slide LU102192. Preferably, the insertion of a filter ensures that the

The plate and slide are moved into the park position and held there. Removing the filter causes the plate and slide to move into the buffer storage position and be held there. In one implementation, at least one mechanical or pneumatic

The spring tends to move the plate and the slide into the buffer storage position and hold them there. Instead of a spring, another/elastic element can also be used, which exerts a force on the slide.

In one embodiment, the volume of the buffer storage can be changed, preferably reversibly. In particular, the buffer storage comprises a:

A wall that is completely or at least partially elastic. This allows the buffer tank to expand and contract. The addition of gas expands the buffer tank, thereby increasing its volume. The expanded buffer tank can then release stored gas, causing it to contract and its volume to decrease. This...

In many cases, the design results in a particularly simple structure.

Buffer storage.

Preferably, this expandable buffer storage tank is in a fluid connection with the

The feed line is therefore located upstream of the filter unit.

The design ensures that the amount of gas that flows per unit of time

The filter unit is reached, and the temporal variation is less pronounced. Then, when the recording-

When an arrangement is connected to a medical device, this reduces

The design poses the risk of undesirably high pressure acting on the medical device and thus on a patient connected to the medical device. The expandable buffer reservoir can also be in a fluid connection with the drainage line and located downstream of the

The filter unit must be arranged.

In one configuration, the recording arrangement includes a stretchable

Buffer storage and a buffer storage with a rigid housing and/or a buffer storage inside the filter housing. The elastic one is preferred.

The buffer storage tank is located upstream of the rigid buffer storage tank (LU102192, 04.11.2020). This reduces the variation in the amount of gas reaching the rigid buffer storage tank (LU102192) per unit of time. It is also possible that the expandable buffer storage tank is connected to the other tank via a fluid connection.

Buffer storage tank is available.

In one application, the recording arrangement according to the invention is connected to a medical device, in particular an anesthesia machine. As /

A bag is used for manual ventilation of a patient, providing a buffer storage capacity. Such a manual ventilation bag is often already approved for medical use and has standardized features.

Dimensions. A connecting piece of the inventive receiving-

The layout can be adapted to these dimensions.

In one embodiment, the intake arrangement additionally includes at least one overpressure valve in or on the feed line. This overpressure valve opens when the differential pressure across the overpressure valve exceeds a predetermined overpressure threshold. The overpressure valve is positioned so that it opens automatically when the difference between the

The pressure in the supply line and the ambient pressure around the supply line are above the overpressure barrier. This causes the overpressure/

The valve releases excess pressure in the supply line and particularly reduces the

There is a risk of backflow in the supply line. This backflow can have an undesirable effect on a device that releases gas into the supply line.

This overpressure barrier is designed in a specific configuration by the construction of the

An overpressure valve is specified. In another design, a pressure-

The sensor measures the pressure difference applied to the overpressure valve. In a

In this implementation form, a control unit receives measured values from this pressure-

The sensor controls the overpressure valve in such a way that the overpressure-

The valve opens when the pressure difference exceeds the overpressure limit.

The barrier is located. In another implementation, the measured values from the pressure sensor are output in a form perceptible to a human. For example, an alarm is triggered if a

A pressure difference above the overpressure threshold is detected. The two 20201023LU 04.11.2020

- 19 / 80 -

Implementation methods that allow the control unit to actuate the overpressure valve and LU102192: that the measured values and/or an alarm are output, can be combined with each other.

In one embodiment, the pressure relief valve is in series with the

The filter unit is arranged upstream of the filter unit, particularly in or on the supply line. In another embodiment, the or a

Overpressure valve arranged parallel to the filter unit. In this other case

In this arrangement, when the pressure relief valve is open, a portion of a gas flows through the

Supply line and around the filter unit. In both configurations, the

With the pressure relief valve closed, the entire gas is directed to the supply line.

Filter unit.

In one embodiment, the open pressure relief valve releases gas into the environment. In another embodiment, a fluid guide unit, in particular a hose or other line, connects the pressure relief valve to the discharge line. When the pressure relief valve is open, a fluid connection is established from the supply line through this fluid guide unit to the discharge line. In a third embodiment, the pressure relief valve is located inside the:

Filter unit arranged. Even with the overpressure valve open, gas flows through the supply line and the filter unit into the discharge line, without entering the .

to escape into the environment. However, at least some of this gas does not flow through the filter of the filter unit, but around the filter. These two preferred designs reduce the risk of leakage when the filter is open.

The pressure relief valve prevents gas from escaping into the environment. Rather, when a pressure relief valve is activated, gas flows out.

Overpressure gas around the filter enters the drain line.

Another possible arrangement of the overpressure valve can be described using the

Combine a design such that the filter unit includes a filter holder, wherein a filter can be inserted into the filter holder and wherein the À

Filter housing in each fluid connection with the supply line and with the

The drain line is in place. With this design, when closed...

The overpressure valve allows the gas from the supply line to pass through the filter to the

The gas is routed through a discharge line. Even with the overpressure valve open, the gas from the supply line flows through the interior of the filter housing into the 20201023LU 04.11.2020 ;

Exhaust line. However, at least some of the gas then bypasses the LU102192 filter. This design reduces the risk of [unclear] when the [unclear] is open.

The pressure relief valve allows gas to escape into the environment.

The pressure relief valve can also be located at the filter housing or on or in the discharge line and, in the event of overpressure, release gas into the

Drain the surrounding area.

In a further development of the design with the overpressure valve, at least one opening is incorporated into a wall of the filter unit. The overpressure valve closes this opening. If the overpressure valve becomes blocked due to a

Overpressure opens, so the filter unit is positioned through the opening in a

Fluid connection with the environment. It is also possible that an opening is arranged parallel to the pressure relief valve.

In a further embodiment, the intake arrangement includes at least one vacuum valve. This vacuum valve opens when the difference between the pressure in the supply line or inside the filter unit, on the one hand, and the ambient pressure, on the other, falls below a predetermined vacuum threshold. Such a large vacuum is often undesirable because it could draw gas out of a device connected to the supply line. If the device is a medical device connected to a patient, the patient could be exposed to the gas through a vacuum.

Negative pressure can be a danger. Such negative pressure can occur, for example, if gas is actively drawn from the discharge line and the

The filter unit and/or the supply line are blocked, or the supply line is damaged.

Device not connecting correctly to the filter unit (malconnection).

Analogous to the overpressure valve, one implementation is the underpressure valve.

The vacuum barrier is defined by the design of the vacuum valve. In another implementation, a control unit causes the vacuum valve to open when the vacuum falls below the vacuum barrier. In a third implementation, a message is issued in a human-perceived form when the vacuum falls below the 30 vacuum barrier. The implementations, that a 20201023LU 04.11.2020

The fact that the control unit automatically opens the vacuum valve and that a message LU102192 is issued can be combined.

In one embodiment, at least one opening, preferably several openings, is embedded in a wall of the filter unit. A

Fluid connection between the interior of the filter unit and the environment can be established. If the filter unit includes a filter holder into which a

If a filter can be inserted or is already in place, the openings are preferably in a

The filter holder is embedded in the wall.

With the vacuum valve open, fluid communication is established between the interior of the filter unit and the environment, allowing gas from the environment to pass through the vacuum valve and the opening(s) into the

Flow can occur inside the filter unit. This, or a closed negative pressure system,

The valve closes this opening or openings when the vacuum is less than the vacuum threshold, thus interrupting the fluid connection between the

Inside the filter unit and the surrounding environment. The openings restrict the flow of gas into the filter unit.

In a variation of this implementation, a vacuum valve is embedded in a wall of the buffer storage tank or in a wall of the supply line. In the case of a

Negative pressure in the buffer storage tank, which lies below the negative pressure barrier, causes flow.

Gas from the surroundings enters the buffer storage tank. This design reduces the risk of excessive negative pressure in the buffer storage tank drawing gas from the supply line, or of the buffer storage tank becoming damaged due to excessive pressure.

The negative pressure will damage the product.

In a preferred embodiment, the filter unit is a

The filter holder includes a pot or is considered a

The pot is designed with a filter that can be inserted into and removed from the top. Ideally, this pot can be fitted with a...

The lid seals fluid-tight, and can be removed again, for example to replace the filter. If the gas to be filtered is heavier than air, it sinks to the bottom of this container, and no relevant [effects] occur.

The amount can escape directly into the environment. Even if no filter is currently inserted in the pot-shaped filter holder, for example, on November 4, 2020 (20201023LU 04.11.2020), only a relatively small amount of the leaked LU102192 escapes.

Gas escapes into the environment, even if the pot is not sealed but open to the environment, especially while the filter is being changed.

This design saves time when changing the filter.

According to the invention, the filter unit is in at least one fluid connection with the supply line. In one embodiment, a section of this supply line is routed through the interior of the filter unit. This section is preferably located between a wall of the filter unit and the fluid flowing into the

Filter housing installed filter. If the filter unit includes a filter housing, a section of the supply line preferably passes through the interior of the

The gas is routed through the filter housing and, when the filter is in place, is located between the filter and the wall of the filter housing. An outlet opening in this section of the supply line determines where gas escapes from the

The feed line exits and enters the filter. This outlet opening can be located near the bottom of the filter unit, particularly the filter holder.

This design is particularly advantageous when the gas from which the gas, or at least one gas component, is to be filtered out is heavier than air, which is especially the case with a gas mixture containing an anesthetic. The outlet opening can also be located near the upper edge of the [unclear text].

The filter unit should be positioned. It is also possible that there is a first outlet opening to the filter and a second outlet opening to a buffer storage tank in the

The drainage pipe may also include a section located inside the:

The filter unit is arranged and is located between a wall of the filter unit and an inserted filter. If the filter unit includes a filter holder, this section of the discharge line is preferably located between the filter and a wall of the filter unit. This section can be a

Must have an entry opening, optionally at least two entry openings.

This design can be combined with the design described above, in which a cavity occurs between the filter holder and the filter and belongs to the buffer storage. Preferably, the section of the

The supply line and the section of the discharge line are fluid-tight in the filter housing LU102192, separated from the buffer storage in the filter housing.

It is possible that a gas enters the inventive device solely by means of this

The intake arrangement ensures that the material is conveyed into the feed line, for example, by being ejected from a device connected to the feed line. In another embodiment, additionally or instead...

Gas is drawn out of the discharge pipe. According to one implementation of this alternative design, the intake arrangement further includes a

Vacuum generator, in particular a suction pump, preferably attached to the |.

The discharge pipe is located or downstream of the discharge pipe.

The vacuum generator is in fluid connection with the discharge line and creates a vacuum in the discharge line. This vacuum in the

The exhaust pipe draws in gas. The extracted gas is removed from a device connected to the

The fluid is drawn through the supply line, filter unit, and discharge line of a device connected to the supply line, particularly a medical device. Preferably, at least one fluid connection connects the device(s) or a buffer reservoir to the discharge line. The negative pressure generated by the negative pressure-

The generator causes the buffer storage to empty through this fluid connection, even if no or only a small amount of gas is currently escaping from the medical device.

In a previously described embodiment, the filter unit comprises a

Filter holder and a filter. The filter holder is in each one

Fluid connection with the supply line and the discharge line. The filter can be inserted into and removed from the filter holder, for example, to replace it with a new filter. The design just described with the vacuum generator achieves a further advantage when combined with a filter holder and a

The filter is implemented. When the filter is replaced, the filter housing is inevitably at least partially in contact with the surrounding fluid.

The vacuum generator draws gas from the filter housing even when no filter is inserted. This reduces the amount of gas escaping from the filter housing into the environment. 20201023LU 04.11.2020

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The vacuum generator is also advantageous if the buffer tank 492492 is permanently or at least temporarily in contact with the environment, for example, to relieve overpressure. The vacuum generator relieves overpressure and reduces the risk of a large quantity of

Gas is leaking into the environment.

In one variation, the vacuum generator is in a fluid connection with the supply line of the receiving arrangement. The filter unit and/or at least one buffer reservoir are arranged downstream of the vacuum generator. This design facilitates the use of a pneumatic

to overcome the resistance of the filter unit. / It is possible that the gas drawn in by the intake pump passes through the

Feed line into the fluid intake described above and from there into the

The discharge line is drawn in. The discharge line and the fluid intake prevent a large quantity of the gas component from escaping into the environment, even if no filter is installed in the filter intake. This effect is primarily achieved because the negative pressure created by the vacuum generator draws gas out of the buffer storage tank, thus preventing it from escaping into the environment.

Another effect of the vacuum generator is the following: The resulting

Negative pressure overcomes a pneumatic resistance of the filter of the intake arrangement and reduces the risk of backflow occurring upstream of the filter.

In a further development of this design, a control unit controls the recording-

The arrangement activates an actuator of the vacuum generator and causes the

A vacuum generator achieves a desired volume flow in the discharge line. A sensor measures the actual volume flow, and the control unit receives readings from this sensor and controls the actuator to reduce the difference between the desired and actual volume flow, thus regulating the volume flow in the discharge line. 20201023LU 04.11.2020

Preferably, the vacuum generator includes a suction pump. Instead of a LU102192

A suction pump can also be any other vacuum generator in a

Fluid connection with the discharge line, for example an electrical system.

The gas is preferentially routed on its way from the supply line to the

The exhaust pipe is forced through the filter unit along a predetermined path, thus forcing the gas to flow. This forced flow ensures that all the gas passes through the filter and no gas bypasses it.

This reduces the risk of unwanted gas entering the

Fluid absorption occurs.

Preferably, the gas is also forcibly guided through the filter. In one embodiment, a wall divides the filter into two sections. Preferably, this wall extends parallel to or obliquely to the direction in which the gas flows through the filter. The first section of the filter is in fluid communication with the supply line, the second section of the filter in fluid communication with the discharge line. The filter is designed such that the gas flows through the

The supply line flows, then through the first area, then through the second.

area and then into the discharge pipe. In this configuration, the gas is filtered twice, once in the first area and once in the second.

Even if one area becomes clogged and achieves a reduced or no filtering effect, the other area still filters. Therefore, this design increases reliability.

Preferably, the intake arrangement includes at least one check valve.

This check valve is, for example, located in the drain line or in the

Supply line arranged. It allows a flow in the direction of the

The inlet pipe passes through the outlet pipe, preventing flow in the opposite direction. This check valve then prevents...

The discharge line is connected to a fluid intake so that fluid from the

Fluid intake through the discharge line and the supply line into a

Device connected to the supply line. Such backflow can damage the device or – in the case of a medical device – endanger a patient connected to the device. The recording- ;!

The arrangement can also include multiple check valves, for example LU102192 one in the supply line and one in the discharge line.

As a rule, the filter in a filter unit can only absorb a maximum amount of each gas component to be filtered out, after which it is exhausted. Once this maximum amount has been absorbed, the filter unit must be replaced. This maximum amount is specified, for example, by the filter unit manufacturer, or can be calculated in advance.

Furthermore, in some configurations of the filter, it is possible that the .

The filter swells due to the liquid and therefore no further action is required.

The amount of a gas component that it can no longer absorb and therefore needs to be replaced.

In one configuration, the recording arrangement includes a component-

Sensor for the gas component or at least one component to be filtered out, in particular an anesthetic sensor. This sensor measures at a ;

Measuring position downstream of the filter is a measure of the quantity or

Concentration of the gas component in the passing gas. If this

If a given component limit is exceeded, the component triggers

The sensor triggers an alarm. A quantity or concentration above the anesthetic barrier indicates that the filter is no longer adequately controlling the substance.

capable of filtering out a gas component from the flowing gas stream. In one embodiment, this alarm is emitted in a form perceptible to a human at a spatially distant location, for example, in a control center. It is possible that the recording arrangement includes various component sensors for different gas components.

In a preferred embodiment, this sensor comprises a measuring probe or other measuring device arranged inside a filter holder of the filter unit. If the gas component to be filtered out is heavier than air and therefore sinks, the

The sensor is preferably located below the filter in the filter housing. In another embodiment, this sensor is arranged downstream of the filter unit. This sensor is described in both embodiments as 20201023LU 04.11.2020.

positioned downstream of the filter. If the filter does not provide sufficient LU102192

The sensor registers an increased concentration of the gas component, which it is unable to filter out from the flowing gas stream, because it is unable to filter out the larger quantity of the component.

Component.

A possible design of the filter unit was already mentioned above.

The filter holder is described as follows: a pressure relief valve inside the filter holder opens when the pressure inside the filter holder exceeds a predetermined pressure threshold. In one implementation, when the pressure relief valve is open, at least a portion of the gas that would otherwise be present is released.

The filter intake is reached, around which the filter is routed within the filter intake. In this situation, the sensor measures with the transducer inside the

Filter uptake results in an increased concentration of the gas to be filtered out.

The sensor detects this increased concentration both when overpressure has occurred and the overpressure valve has opened, causing the gas to flow around the filter in the filter housing, and when the overpressure valve is closed and the gas flows through filter A, but the filter is no longer able to filter out the gas component sufficiently.

In one embodiment, an alarm is triggered if at least one of the following situations has occurred: — The sensor just described measures an increased concentration in the

Inside the filter housing. — A pressure relief valve on the supply line, filter unit, discharge line, or on the buffer tank has opened or has opened. — A vacuum relief valve on the supply line, filter unit, discharge line, or on the buffer tank has opened or has opened.

This design ensures that an alarm is triggered both when the filter is exhausted due to a high concentration of the gas component and when the filter becomes clogged for another reason, such as a blockage. In many cases, an alarm is also triggered if a blockage occurs upstream of the filter (LU102192).

In another version, the admission order includes a

Component Quantity Determiner. This component quantity determines approximately a measure of the quantity of the specified gas component, in particular anesthetic, that the filter has absorbed so far. "So far" preferably means: since the point in time when the use of the currently used filter in the filter unit began. The component-

The quantity detector can be located inside a device that is connected to the

The component quantity determiner is connected to the supply line or implemented on a computer, for example, on a smartphone. To approximate this quantity, the component quantity determiner uses, in one configuration: — on the one hand, a signal for the time-varying volume flow of gas through the supply line to the filter unit, and — on the other hand, a signal for the time-varying concentration of the gas component or at least one gas component in the supply line.

In another configuration, the component quantity determiner receives a .

Signal for the injection of the gas component into the supply line.

For example, the amount of anesthetic added to a carrier gas is measured once.

The component quantity analyzer receives these signals via cable or radio waves. From these two signals, the component quantity analyzer calculates...

Investigators have estimated the amount of material the filter has absorbed so far.

The product of the gas volume flow and the concentration yields the

Volume flow rate of the gas component.

This design eliminates the need for a sensor downstream of the filter unit. A device that can be connected to the feed line often already includes a sensor for the volumetric flow rate.

In some cases, the concentration of the gas component can be measured by another sensor on this device or adjusted on the device itself.

The component quantity detector is at least temporarily in a wired or wireless (via radio waves) data connection with these two LU102192 sensors.

In one embodiment, the information about the quantity of the gas component that the filter of the filter unit has absorbed so far is stored in a data storage device. If it is possible that the filter may absorb different quantities of gas, this information can be stored in a data storage device.

In a further development of this design, for each possible gas component that the filter can absorb, a label for this gas component and information on the quantity of this gas component that the filter has absorbed so far are written on the data carrier.

The data carrier can be a component of the filter unit and, for example, attached to the filter unit. A data storage device that is part of the

The filter unit is designed as an RFID chip, but it can also be designed as a barcode. The data storage can be located separately from the filter unit. The amount recorded so far can be measured by a sensor.

The filter unit must be measured or approximately determined by the component quantity determiner just described. Preferably, this information can be obtained from the stored quantities in the

Determine and read the distance and compare it with a predefined specification, where the specification defines the maximum amount the filter can hold. This design makes it possible to provide a new filter or a new filter unit with a filter in a timely manner.

Furthermore, the design with the data storage for the recorded quantities makes it easier to process the used filter and/or

to extract materials from the filter. Information stored in the data storage can be used to adapt the processing to the requirements of the

To adapt the filter to the gas components and/or quantities absorbed by the gas.

It is possible that the same filter will have different effects during the course of a single use.

capable of recording gas components. Preferably, the data storage contains information about the maximum possible amount for each gas component.

Amount stored. For each gas component, the quantity which the 20201023LU 04.11.2020

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Filter has recorded so far, with the maximum possible amount that is in | 192192

The data storage location was compared.

The gas component that the filter is able to remove from a flowing gas is, in one embodiment, an anesthetic. In another embodiment, the component is a gas that is harmful and/or flammable to humans. The gas component can also be a quantity of particles that are or may be contained in the gas, for example...

Dust, microbes, or other pathogens that may be present in the air. It is possible that the filter is capable of filtering out multiple gas components, for example, several different anesthetics and/or at least one anesthetic, as well as particles, from a gas flowing through it.

The invention further relates to a medical arrangement comprising at least one medical device and a receiving arrangement according to the invention. The medical device(s) is, in particular, an anesthesia machine.

The feed line of the recording arrangement is at least temporarily in a ;

Fluid connection with the or a medical device. Preferably this allows

Fluid connections can form and later dissolve again. This allows the same

Admission order: one after the other with different medical

Connect devices, and the same medical device can be connected to different recording configurations one after the other.

In one embodiment, the recording arrangement according to the invention is spatially separated from the medical device. The feed line of the recording device is…

The arrangement is in fluid connection with the medical device.

The recording setup can preferably be connected sequentially to different medical devices. In another...

In this embodiment, the inventive intake arrangement is an integral part of the medical device and is arranged inside the medical device. Preferably, the discharge line provides a connection point for fluid that has been expelled by the medical device and/or that is being drawn in.

In one configuration, the medical order includes a first and a second medical device. Optionally or simultaneously, a

Establish a fluid connection between the supply line and the first medical device | 102192 and/or the supply line and the second medical device.

This design eliminates the need to provide a separate recording setup with a filter unit for each of the two medical devices.

If both medical devices are connected simultaneously to the recording setup, the volume flow and/or the

The pressure in the supply line is less than if the intake setup were connected to only a single medical device.

It is also possible that the inventive recording arrangement is optionally or simultaneously connected to three or more medical devices in a fluid connection.

According to the invention, the discharge line can be connected to a fluid intake, which in one embodiment is a stationary fluid intake.

This stationary fluid uptake is preferably part of a medical procedure.

infrastructure system, in particular a stationary infrastructure system in a

Hospital. This medical infrastructure system is also capable of supplying the necessary gases and other fluids for the medical equipment.

Optionally, a vacuum generator, such as a suction pump, is available.

Fluid absorption at least temporarily in a fluid connection with

Drainage pipe and is able to draw in gas.

The invention further relates to a medical system, wherein the medical system comprises a medical arrangement with at least one medical device and a receiving arrangement according to the invention, as well as a fluid receiving device. The discharge line of the receiving arrangement is at least temporarily in fluid communication with the fluid receiving device.

In a further development of this design, the medical system includes at least one additional fluid intake. The two are particularly preferred.

Fluid images of the medical system: stationary fluid images.

Optionally or simultaneously, a fluid connection can be established between the Ë

Fluid intake and the discharge line or the further fluid intake and the

Establish drainage. It is also possible that the medical system includes three or more fluid intakes, with the drainage line optionally or . 20201023LU 04.11.2020 simultaneously in each fluid connection with at least three LU102192

Fluid recordings are available.

The design with at least two fluid intakes makes it possible to absorb a particularly large quantity of gas from the medical device.

It is also possible to selectively direct a gas emitted or drawn in by the medical device into one or the other fluid intake, which is sometimes particularly advantageous when the medical device emits different gases one after the other, for example gases containing different anesthetics.

In another application, the recording arrangement is used to...

Air in an area, for example in an enclosed space in a

To clean buildings or vehicles of microbes, other pathogens, or particles. The intake arrangement preferably includes a [missing information].

Conveyor unit or is in a fluid connection with a conveyor unit.

This conveyor unit transports the air to be cleaned from the room through the ©

feed line, filter unit and discharge line through back into the

Space.

The invention is described below using an exemplary embodiment. Here, it is shown that...

Figure 1 shows a medical arrangement with an anesthesia device and an inventive recording arrangement;

Figure 2 shows a design with a pneumatically actuated .

Buffer storage inside the filter housing and around the

Filter around, with a cartridge containing a filter inserted;

Figure 3 shows the design of Figure 2, with the cartridge removed; 20201023LU 04.11.2020

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Figure 4 is a modification of the design of Figure 2, where the LU102192

Gas is forced through the cartridge and the

Cartridge is inserted: =

Figure 5 shows a modification of the embodiment of Figure 4, wherein a pressure relief valve is arranged in the supply line, which releases gas into the environment in case of overpressure: .

Figure 6 shows a modification of the design shown in Figure 5, wherein the open pressure relief valve does not release gas into the environment, but into the discharge line; .

Figure 7 is a variation of the design of Figure 6, wherein the

The sensor of the filter unit also measures the gas released by the overpressure valve;

Figure 8 shows different possible forms of realization of the overpressure

Valve from Figure 5 to Figure 7;

Figure 9 shows a cross-sectional view of the design of Figure 4 E to Figure 7 in the plane A — A of Figure 4 to Figure 7;

Figure 10 shows the design of Figure 4, with the cartouche . removed: .

Figure 11 shows a design with a vacuum valve on the pot;

Figure 12 shows different possible forms of realization of the ;

Vacuum valve of Figure 11; .

Figure 13 shows different possible implementation forms of an elastic buffer storage in the supply line: .

Figure 14 shows a design with a mechanically acting

Buffer storage inside the filter housing and additionally below the filter, with the cartridge inserted: .

Figure 15 shows the design of Figure 14, with the cartouche removed; .

Figure 16 shows a modification of the embodiment of Figure 14 and Figure LU102192 15, wherein the gas is forcibly guided through the cartridge and the cartridge is inserted;

Figure 17 shows the design of Figure 16, with the cartouche removed; .

Figure 18 shows a further modification of the design shown in Figures 14 and 15, wherein an inserted filter holds a movable slider in a park position;

Figure 19 shows the embodiment of Figure 18, wherein the filter is removed and the slider is in a buffer storage position;

Figure 20 shows an embodiment with a separate buffer storage below the filter holder, in which the cartridge is inserted;

Figure 21 shows the design of Figure 20, with the cartouche removed.

Figure 22 shows a combination of several variations of the

buffer storage, with the cartridge inserted;

Figure 23 is the combination of Figure 22, with the cartridge removed;

Figure 24 shows an embodiment with a separate buffer storage tank downstream of the filter inlet;

Figure 25 shows a modification of the arrangement according to Figure 1, which additionally includes an anesthetic quantity detector and a

Data storage on the filter unit includes;

Figure 26 shows a filter unit with two filters, which are in a

are used in revolver mounts;

Figure 27 shows an embodiment in which two medical devices are connected using the same inventive mounting arrangement; 20201023LU 04.11.2020

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Figure 28 shows an embodiment in which two stationary gas intakes LU102192 are connected to the same intake arrangement according to the invention.

In the exemplary embodiment, the invention is used to artificially ventilate a patient and to administer at least one anesthetic agent to him in the process.

The patient is in an enclosed space while being artificially ventilated, for example in a hospital room or on board a vehicle.

Figure 1 shows a medical setup for sedating and artificially ventilating this patient P. Patient P is supplied with breathing air via an inspiratory gas line 27. This breathing air is mixed with at least one anesthetic agent f to keep patient P sedated. The exhaled air from patient P is

Breathing air contains carbon dioxide (CO2) and is extracted via an expiratory gas line 28. Both gas lines 27, 28 are connected to a medical device in the form of an anesthesia machine 1, which maintains a ventilation circuit to supply the patient P with breathing air and anesthetic, and to extract and collect exhaled air.

The anesthesia machine 1 is supplied by a hospital infrastructure with pressurized, stagnant air, pure oxygen (O2), and nitrous oxide (N2O). The...

The anesthesia device 1 comprises the following components in the exemplary embodiment: — a mixer 29, which generates a mixture from two of the three supplied gases air, O2 and N2O, which is used as a carrier gas for the anesthetic agent, — a fan unit 5, which moves gas in the ventilation circuit and thereby maintains the ventilation circuit, — an anesthetic vaporizer 2, which contains a tank 49 for liquid anesthetic.

anesthetic agent includes, and ; — an internal filter unit 3 with a limescale filter, which consists of the

Patient P's exhaled air is filtered out via expiratory gas line 28, removing CO2. 20201023LU 04.11.2020

The anesthetic vaporizer 2 releases the anesthetic from the Lu102192 into the carrier gas:

Tank 49. For example, the anesthetic vaporizer 2 vaporizes the

Anesthetic in tank 49 or injected into the carrier gas.

The anesthesia machine 1 supplies gas to the ventilation circuit. The filter unit 3 removes gas, especially CO2, from the ventilation circuit. The net result is...

The ventilation circuit therefore supplies more gas than it removes. It is therefore necessary to remove excess gas from the ventilation circuit.

This excess gas, hereinafter referred to as "excess gas", is removed from the anesthesia machine 1 by means of two gas lines 6 and 8, namely a supply line 6 and a discharge line 8. On the one hand, the

Fan unit 5 extracts gas and conveys the expelled excess gas into the

feed line 6 into, whereby the volume flow of the ejected

The excess gas varies over time, and the temporal course of the .

The volume flow, for example, has the shape of a half-sine curve. Secondly, the expelled excess gas is guided through the discharge line 8 and, in one configuration, drawn in.

In the exemplary embodiment, the discharge line 8 leads into a stationary .

Fluid intake 7, which is embedded in a wall W. The fluid intake 7 is: preferably a component of a stationary infrastructure of a hospital, which receives and conveys gas emitted by various medical devices.

Preferably, a check valve 65 is integrated into the discharge line 8, which allows gas from the discharge line 8 to pass towards the fluid intake 7, but prevents gas from flowing backwards from the fluid intake 7 through the

Flow is present in drain line 8. In an alternative implementation, this is...

The check valve 65 is integrated into the fluid intake 7. It is also possible that the check valve 65, or a check valve 65, is positioned in the supply line 6 or in the connection between the supply line 6 and the anesthesia machine 1. In all possible positions, the check valve 65 allows the

The anesthesia machine 1 emits gas, but prevents backflow onto the

Anesthetic device 1 and thus can act on patient P. 20201023LU 04.11.2020

The medical arrangement further includes a Lu102192 according to the invention:

Recording arrangement 100 with a filter unit 4 and with lines 6 and 8. The filter unit 4 comprises a filter 11, 20 and a pot 13, which serves as a

Filter intake functions. These components are described in detail below (section 7).

In the embodiment shown in Figure 1, the supply line 6 is partially located outside the anesthesia machine 1. It is also possible that the

The supply line 6 is located entirely within the anesthesia device 1 and the filter unit 4 is detachably coupled to the anesthesia device 1. It is also possible that the receiving arrangement 100 according to the invention is located entirely within the anesthesia device 1.

In one embodiment, only the anesthesia device 1 causes the following:

Excess gas is expelled through pipes 6 and 8.

In another embodiment, a suction pump 10, which is located in a ,

Fluid connection with discharge line 8 is established, excess gas from the

Intake arrangement 100. This suction pump 10 can preferably be switched on and off and generates a volume flow of l

Remove filter unit 4 and pass through the discharge line 8, as shown.

In this implementation, the suction pump 10 is positioned in front of the wall W and is in fluid connection with the discharge line 8. In another .

In this implementation, the suction pump 10 is located in or behind the wall W and is in fluid communication with the fluid intake 7 and via the ,

Fluid intake 7 also indirectly in a fluid connection with the discharge line 8. .

In one embodiment of this intake, the volume flow, i.e. the ,

The volume flowing through the discharge line 8 per unit of time is either constant or follows another predefined time profile. An optional volume flow sensor 9 measures the volume flow, i.e., the volume, per unit of time in the discharge line 8. In one embodiment, the

Suction pump 10, controlled depending on measured values of the volume flow sensor 9, for example by a control unit of the intake arrangement 100, so that the actual volume flow through the discharge line 8 equals a , 20201023LU 04.11.2020 .

The desired, predetermined volume flow rate is thus determined. Therefore, the actual Lu102192

Volume flow in the discharge line 8 is automatically regulated. /

In another embodiment, a pressure sensor (not shown) measures the

Pressure at a measuring point in or upstream of the discharge line 8, preferably also upstream of the filter unit 4 described below.

As soon as the measured pressure exceeds a predetermined pressure barrier, the suction pump 10 is activated and draws excess gas into the discharge line 8.

The suction pump 10 remains activated until the measured pressure falls below the

Pressure barrier decreases.

The excess gas expelled and extracted from anesthesia machine 1 may contain O2, N2O and/or anesthetic agents. Therefore, this

Excess gas is directed to a receiving arrangement 100 according to the invention.

This recording arrangement 100 is connected to the anesthesia machine 1 via the supply line 6 in a fluid-tight fluid connection and via the

Discharge line 8 in a fluid-tight fluid connection with a stationary

Gas intake 7. The gas intake 7 is located on a wall W and partly behind this

Wall W is located and is part of the hospital infrastructure. Preferably, both the connection between the anesthesia machine 1 and the

Supply line 6 as well as the connection between the discharge line 8 and the

Dissolve gas intake 7 and restore it later.

The excess gas is passed through a filter unit 4. The supply line 6 leads from the anesthesia machine 1 to this filter unit 4. The discharge line 8 leads from the filter unit 4 to the gas intake 7. The gas intake 7 receives the filtered gas, which flows through the discharge line 8. The filter 11, 20 of the

Filter unit 4 filters unwanted components from the excess gas, in particular the anesthetic agent(s). The preferred method is to use the intake-

Arrangement 100 is designed such that the excess gas is necessarily guided through the filter unit 4 and cannot bypass it.

Because the gas intake 7 takes in the filtered excess gas after unwanted components have been filtered out of the excess gas, in many cases it prevents a relevant amount of unwanted

components, for example of O2, N2O and/or anesthetics, into the 20201023LU 04.11.2020

- 39 / 80 - ;

Hospital infrastructure or enters a room of the hospital, or is released into the hospital environment. The first event is undesirable because the released gas, especially an anesthetic, is harmful.

This could have a negative impact on the health of people in the room and additionally increase the oxygen content.

It could damage devices. The second event is undesirable because the;

Environmental emissions should be kept to a minimum.

In the embodiments shown below, the supply line 6 connects the filter unit 4 to the medical device 1. It is also possible that the

Filter unit 4 can be directly and detachably coupled to the medical device 1, for example by means of two corresponding coupling elements.

The design eliminates the need for a supply line 6 outside the medical device 1.

In the embodiments described below, the filter unit 4 comprises a filter holder in the form of a pot 13, which is rotationally symmetrical to a

The central axis is arranged vertically in use. An approximately cylindrical filter can be inserted into this pot from above and removed again. Optionally, a lid 42 can be placed on top of the pot 13 and removed again. The filter unit 4 also includes the filter 11, 20.

In one embodiment, the pot 13 includes a filter sensor 47 that detects whether a filter 11, 20 is inserted into the pot 13 or not. For example, a contact switch of the filter sensor 47 closes an electrical circuit when a filter 11, 20 is inserted, or interrupts such a circuit when a filter 11, 20 is inserted. This embodiment makes it possible to generate an alarm and output it in a human-perceivable form if, for a period of time greater than a predetermined time interval,

The barrier is closed, no filter 11, 20 is inserted in the pot 13. In a further development of this configuration, this warning is only issued if it is additionally determined that a gas mixture is flowing through the supply line 6 and/or into the filter unit 4.

Figures 2 to 17 show several possible designs of the recording device.

Arrangement 100, wherein a buffer storage tank as described below is arranged between a cartridge of filter unit 4 and the pot 13. Same LU102192

Reference symbols have the same meaning. Figures 2 to 7, 10, 11, and 14 to 17 show filter unit 4 in a side view, where ; the central axis of filter unit 4 lies in the plane of the drawing. Figure 9 shows the '

Filter unit 4 in a cross-sectional view in plane A — A from Figure 4 to

Figure 7, where the central axis of the cylindrical filter unit 4 is perpendicular to the plane of Figure 9. Figures 20 to 24 show different \

Embodiments, wherein the buffer storage is arranged outside the pot and wherein the filter unit 4 is also shown in a side view. It is also possible that the intake arrangement 100 has both a buffer storage in the

Pot 13 also has a buffer storage tank outside of pot 13.

In the embodiments shown, the filter unit 4 comprises: — the actual filter 11 for the anesthetic agent, which is hereinafter referred to as the “filter element”, — a cylindrical cartridge 20, which surrounds the anesthetic agent filter 11, preferably completely and gas-tight except for the openings described below, — a circumferential projection 12 at the top of the cartridge 20, — a cylindrical pot 13, which surrounds the cartridge 20 with the

The anesthetic filter 11 accommodates a base 44 and has a jacket surface. It includes a pot-shaped supply line 16, which is fluid-tightly connected to the supply line 6, and excess gas supplied from an opening 22.1 to the

bottom 44 of the pot 13 and terminates in an outlet opening 14, — a pot discharge line 32, which is fluid-tightly connected to the discharge line 8, directs excess gas exiting from the anesthetic filter 11 to the discharge line 8, in an inlet opening 35 or at the level of the

The cartridge 20 begins at the bottom 39 and leads to an opening 22.2, — a sensor 15 that measures the quantity of anesthetic below or in a lower region of the anesthetic filter 11, — a consumption indicator 17 which indicates, in particular, when the

Cartridge 20 with the anesthetic filter 11 must be replaced, and — a measuring line 18 that leads from the sensor 15 to the consumption indicator 17. 20201023LU 04.11.2020

In the following, the component comprising the filter element 11 and the cartridge Lu102192 : 20 will be referred to as "filter 11, 20" or "anesthetic filter 11, 20". In one embodiment, the filter element 11 and the

Cartridge 20 is a single component that can only be replaced as a whole. It is also possible that the filter element 11 can be inserted into and removed from cartridge 20, so that the same!

Cartridge 20 can be used successively for different filter elements 11.

The filter element 11 for anesthetics preferably has the shape of a cylinder; and is preferably designed as a rigid body, which particularly preferably consists of or contains activated carbon. The filter element 11 can also

Zeolites are included. The central axis of this cylinder is arranged vertically when the filter 11, 20 is inserted into the pot 13, and lies in the drawing planes of Figures 2 to 7, 10, 11, 14 to 24 and 26, and is perpendicular to the drawing plane of Figure 9. The following is particularly preferred:

Filter element 11 is designed as a monolith of activated carbon with several parallel channels. Such a filter element 11 exhibits lower pneumatic resistance than other filters with comparable filtration performance and is lightweight. However, such a filter element 11 is sensitive to mechanical stress and can break relatively easily. Such an activated carbon filter element is described, for example, in DE 10 2015 012 410.

A1 described.

The cartridge 20 protects the filter element 11 to a certain extent from mechanical damage. The cartridge 20 preferably also has the shape of a cylinder, the central axis of which preferably coincides with the central axis of the

The filter element 11 corresponds to the filter element 11 and has a lid 42, a base 39, and a surface 43 extending between the lid 42 and the base 39. The lid 42 and the surface 43 are impermeable to fluids—except for optional openings, which are described below. The base 39 is also impermeable to fluids in one embodiment and permeable to fluids in another. Preferably, the

Cartridge 20 is made of a hard plastic or metal. Preferably, at least one guide element is arranged on the outside of the cartridge 20, 20201023LU 04.11.2020, which corresponds to a corresponding guide element on the inside wall Lu102192 of the pot 13. These two corresponding

Guide elements ensure that a filter 11, 20 is correctly (in a correct

(rotation position) is inserted into pot 13.

In one embodiment, the filter 11, 20 comprises a data storage device 92, which is preferably attached to the outside of the cartridge 20 and is, for example, an RFID-

It is designed as a chip or as a barcode. This data storage device contains 92...

Information about filter 11, 20 was saved. A not shown ;

The reading device of the recording arrangement 100 is capable of reading this information. In a preferred embodiment, this reading device is a read and write device, i.e., it is also capable of writing information to the data storage device 92.

Preferably, a unique identifier for filter 11, ; 20 is stored in data storage 92. This identifier distinguishes this filter 11, 20 from all other filters used in the hospital. In a ;

In this implementation, the reader reads this unique identifier, and a central data storage system (not shown) records which filter 11, 20 is currently connected to which anesthesia machine or other medical device in the hospital via a fluid connection. This information is updated as needed.

As a rule, filters 11 and 20 should or may only be used in a single recording.

Arrangement 100 may be used until it is consumed and may not be reused afterward — or only after reprocessing. An undesirable

Reuse can be prevented, for example, by evaluating the data storage 92 just described. In a preferred .

In contrast, the data storage device 92 contains information, for example in the form of a flag, indicating whether this data storage device 92, and thus the

Filters 11 and 20, to which this data storage device 92 is attached, are already in a

Recording arrangement 100 has been inserted or not. The data storage 92 of a new filter 11, 20 contains the information that the filter 11, 20 has not yet been inserted. The read/write device reads after the insertion of a .

Filters 11 and 20 display this information. If filter 11 and 20 was already used in a previous entry dated 20201023LU (04.11.2020), this information will be displayed.

Recording arrangement 100 was used, so the reading and |u102192 is generated.

The writing device will display a corresponding message. Otherwise, it will save on the

Data storage 92 retrieves the information that filter 11, 20 is now in a .

Recording arrangement 100 was used. Preferably, the reading and .

The writing device will display an error message if, after inserting a filter 11, 20, it does not find a data storage device 92 or cannot read the data storage device 92.

In the case of a barcode, the reader reads, for example, the unique identifier!

Filter identifier 11, 20 and then makes the barcode 92 : unreadable, for example by spraying a liquid or painting over it or covering it with a sticker.

In one embodiment, the information can be stored on and read back from the data storage device 92, indicating when a filter 11, 20 is connected to this filter.

Data storage device 92 was first inserted into a pot 13 of a recording arrangement 100. For a new filter 11, 20, no insertion date is stored. The read/write device stores the date, optionally the

The point in time from which a filter 11, 20 was inserted into a pot 13. This .

The information can be retrieved later to determine how long the

Filter already used in pot 13. In some cases, a maximum usage period for a filter 11, 20 is specified. In another

In its current form, barcode 92 contains the information about when filter 11, 20 was manufactured. The reader reads this manufacturing date and then renders the barcode unreadable.

The configuration just described, with the insertion date, can also be used to prevent the same filter 11, 20 from being inserted multiple times in succession. If the read/write device already has an earlier filter in data memory 92 when a filter has just been inserted;

Date of insertion discovered, this filter 11, 20 was already used earlier Ë, and the read/write device generates a corresponding

Message. If barcode 92 is unreadable, a message will also be displayed.

Error message displayed.

In one embodiment, the data storage device 92 stores information on which anesthetics the filter element 11 may be used for (20201023LU 04.11.2020) and/or information on which it may not be used for. The LU102192

The reader reads this information from data storage 92. Preferably, the reader is in a data connection with the anesthesia machine 1 and transmits the information about the permissible and/or impermissible

The anesthetic agent from the currently used filter element 11 is sent to the anesthesia machine 1. For example, due to user input, an internal

The data storage of the anesthesia machine 1 stores the information which .

The anesthetic agent is currently in use. The anesthesia machine 1 automatically checks whether the filter element 11 is suitable for the currently used anesthetic agent(s).

Whether an anesthetic is approved or not. In the case of an unapproved anesthetic.

Filter element 11 generates a corresponding

Error message in a form perceptible to a human.

Pot 13 is fluid-tightly connected to the supply line 6 and the discharge line 8. The material from which the walls of pot 13 are made is suitable for

The fluid is impermeable and is not chemically attacked by an anesthetic. Preferably, the walls of pot 13 are made of a hard plastic or metal.

If the cartridge 20 is inserted correctly and, in particular, in the correct rotating position into the

When pot 13 is inserted, in one embodiment the outlet opening 14 of the pot supply line 16 overlaps with an inlet opening 25 in the cartridge 20.

Inlet opening 35 overlaps with an outlet opening 34 in the cartridge 20.

The two openings 14, 35 are located near the bottom 44 of the pot 13, the two openings 25, 34 in the surface 43 and near the bottom 39 of the

Cartridge 20. Excess gas can flow through the inlet opening 25 in the cartridge © 20 into the filter element 11 and through the outlet opening 34 in the .

Cartridge 20 flows out of filter element 11 again. The .

The anesthetic filter 11, 20 forces the gas to flow through it, so that the excess gas flows over a relatively long path from the inlet opening 25 to the outlet opening 34 through the anesthetic filter 11, 20.

In one embodiment, shown in Figure 5, a

Overpressure valve 50 arranged, wherein the overpressure valve 50 is in a 20201023LU 04.11.2020

The fluid connection with the supply line 6 is established. The pressure relief valve 50 is located, i.e., upstream of the filter unit 4. Depending on the difference between the pressure in the supply line 6 and the pressure in the environment around the supply line 6, the pressure relief valve 50 is either closed or open.

As long as the pressure difference remains below a predetermined overpressure threshold, this overpressure valve 50 is closed. As soon as the pressure difference reaches or exceeds the predetermined overpressure threshold, it opens.

Overpressure valve 50 opens automatically or is opened and provides a

Fluid connection between the supply line 6 and the environment.

Excess gas can escape into the environment. Preferably, the overpressure valve 50 closes automatically or is closed as soon as the pressure in the supply line 6 falls below the overpressure threshold.

In a simple mechanical implementation, the pressure relief valve 50 comprises a valve plate 51 which rests on an upwardly open valve crater 52.

Ratio between the weight of the valve plate 51 and the area of the upper

The opening of valve crater 52 determines the achieved overpressure limit.

Gas pressure above the overpressure barrier lifts the valve plate 51 from the

Valve crater 52 is activated so that the gas can escape.

Figure 6 shows a modification in which a pressure relief valve 50 is also used, but this pressure relief valve 50 does not release the excess gas into the environment. Rather, the pressure relief valve 50 is parallel to the

Filter unit 4 is switched on. The overpressure valve 50 is located inside the

Pot 13 and there at or near the end of the pot supply line 16. Gas escapes through the overpressure valve 50 from the pot supply line 16 into the pot 13 when the pressure difference in the pot supply line 16 is above the overpressure

The barrier is located. A hose 62, only schematically indicated, carries away the excess gas, which in the event of overpressure from the overpressure-

Valve 50 exits, past filter unit 4 to the discharge line 8. This

Hose 62 can be located at least partially inside pot 13.

In one embodiment, the sensor 15 measures a measure of the quantity of

Anesthetic agent that is not absorbed by filter element 11 and therefore leaves filter 11, 20. Preferably, the sensor 15 is located downstream. 20201023LU 04.11.2020

-46/ 80 - from filter unit 4 and measures the concentration of or at least one y102192

anesthetic in the gas stream around sensor 15. Ideally, the anesthetic filter 11, 20 filters all of the anesthetic from the flowing gas.

The anesthetic is extracted and absorbed. If the amount of anesthetic that is not absorbed by filter element 11 or otherwise taken up exceeds a predetermined limit, this is an indication that the

Filter element 11 is filled with anesthetic or has become clogged, cannot absorb any more anesthetic, and must be replaced.

The exemplary embodiment includes the measuring sensor 15, the measuring lead 18 and the

Consumption indicator 17 for the cartridge 20. The same cartridge 20 can be used successively for several filter elements 11. It is also possible that the sensor 15, the measuring line 18 and the consumption indicator 17 are positioned separately from the cartridge 20.

The cartridge 20 hangs in a configuration in the pot 13, wherein the circumferential

Rim 12 rests on the top edge of pot 13. Two upper

Sealing elements 41 or a single circular sealing element 41 close the area between the upper edge of the pot 13 and the surrounding

Edge 12. Preferably, the sealing ring or other suitable sealing element 41 is completely enclosed around the upper edge of the pot 13, so that the inserted cartridge 20 hangs gas-tight in the pot 13. Because the cartridge 20 in

Since pot 13 hangs and, in the exemplary embodiment, is not as high as pot 13, a gap is created between the bottom 39 of the cartridge 20 and the

The base 44 of the pot 13, which belongs to a buffer storage tank described below. It is also possible that the cartridge 20 does not have a surrounding rim 12 and does not hang inside the pot 13, but rather rests on the base 44 of the pot 13.

In all embodiments, the filter unit 4 comprises a buffer storage tank 19 (embodiment according to Figures 2 to 11 and Figures 14 to 19) inside the rigid pot 13, or an expandable buffer storage tank 70 (Figure 13), or a rigid buffer storage tank 23 (embodiment according to Figures 20 to 23) on the supply line 6 or the discharge line 8, wherein the buffer storage tank 19, 23, 70 is connected to both the gas lines 6 and 8 and to the environment in a

Fluid connection is established and capable of receiving and releasing fluid. This 20201023LU 04.11.2020

Buffer storage tanks 19, 23, 70 absorb gas expelled by the anesthesia machine 1 | 102192, as long as the rate of fluid inflow in supply line 6 is greater than the rate of fluid outflow in discharge line 8.

Buffer storage tanks 19, 23, 70 release the absorbed gas again when, conversely, the volume flow in the discharge line 8 is greater than the

Volume flow in the supply line 6. In particular, when the patient P exhales, i.e. during the expiratory phase, more fluid usually flows from the:

Anesthesia machine 1 into supply line 6, as flow from supply line 6. :

When the patient P inhales, i.e. during the inspiration phase, less fluid flows into the supply line 6.

The described embodiments of a buffer storage device 19, 23, 70 can be combined; it is therefore possible that a recording device according to the invention;

Arrangement 100 one, two or three of the different buffer storage units 19, 23, 70 described above and/or two identical buffer storage units

has a buffer storage

In one embodiment, a rigid buffer storage tank 23 is located below the

Pot 13. The gas to be absorbed is usually heavier than air and sinks through an opening 26 in the bottom 44 of pot 13 into the buffer storage tank / 23, which is located below pot 13.

In the example of Figure 7, a preferably horizontal partition 53 separates the '

Buffer storage tank 19 from filter unit 4. Both the gas that passes through the

Filter unit 4: The gas flows into and is filtered within it, and the excess gas that escapes from the pressure relief valve 50 enters a space 54 between filter unit 4 and the partition 53. The gas from this space 54 passes through an opening in the partition 53 into the buffer storage tank 19 and then flows from the buffer storage tank 19 through the pot discharge line 32 into the discharge line 8.

In the configuration shown in Figure 7, the sensor 15 is located in space 54, i.e., downstream of the filter 11, 20, and measures the concentration of

Anesthetic in room 54. A concentration above a predetermined level.

The barrier has at least one of the following two causes: 20201023LU 04.11.2020

- 48 / 80 - — Filter unit 4 is clogged or has been consumed for another reason | j192192 and is therefore no longer able to filter sufficient anesthetic from the flowing gas stream. — The pressure in the pot supply line 16 is above the overpressure limit.

The barrier is closed, and the overpressure valve 50 has opened and is releasing gas into the

Room 54 in pot 13 from.

Both events require the replacement of filter unit 4. Display unit 17 signals to a user that filter unit 4 needs to be replaced.

Figure 8 shows seven different possible forms of realization of the overpressure

Valve 50. The overpressure valve 50 in the embodiments according to Figure 4, Figure 6 or Figure 7 can be implemented with any of these realization forms.

Figure 8a) shows the previously described implementation form 50.1, in which a

Valve plate 51 rests on a valve crater 52. With a sufficiently large

Pressure raises the valve plate 51, allowing gas to escape from the space between the raised valve plate 51 and the valve crater 52. The ratio between the weight of the valve plate 51 and the area of the opening of the valve crater 52 determines the overpressure limit.

The overpressure valve 50.2 according to figure 8b) additionally comprises a compression spring 55, which is supported on a housing of the overpressure valve 50 and tends to push the valve plate 51 upwards against gravity.

Preferably, the valve plate 51 is designed to be heavier than in the

Implementation according to Figure 8a). The overpressure barrier is additionally determined by the spring constant of the compression spring 55. The overpressure valve 50.2 according to Figure 8b) only opens when a pressure above the

The overpressure barrier remains in place for a sufficiently long time. Short-term pressure peaks are thus absorbed. The risk of a leak is reduced.

Overpressure valve 50 occurs. Such an overpressure valve is described, for example, in US 8997741 B2.

In the overpressure valve 50.3 according to Figure 8c), the valve plate 51 is separated by a

Valve ball 56, which rests on the valve crater 52, is replaced. The overpressure- 20201023LU 04.11.2020

- 49 / 80 -

The limit is determined by the ratio between the weight of the valve ball Lu102192 56 and the area of the valve crater 52.

The overpressure valve 50.4 according to Figure 8d) comprises a valve flap 57 which is attached to the valve crater 52 and can rotate relative to the valve crater 52 about a horizontal axis of rotation that is perpendicular to the plane of Figure 8. Overpressure rotates this valve flap 57 away from the valve crater 52 against gravity, so that a

An opening is created. Gravity, and optionally a tension spring (not shown), tend to keep the valve flap 57 in the closed position.

Alternatively, the optional tension spring tends to pull the valve flap 57 against the

to pull gravity into the open position and hold it there.

In particular, a relatively heavy valve flap 57, in conjunction with the optional tension spring, ensures that the overpressure valve 50.4 only opens when overpressure has been present for a sufficiently long time. Short-term

Pressure fluctuations are cushioned.

The pressure relief valve 50.5 according to Figure 8e) comprises a U-shaped tube 58 in which a liquid 59 is located in a lower part. This liquid 59 only evaporates at a temperature above the temperature at which the pressure relief valve 50 is used and stored. If the pressure exceeds the

If the overpressure limit is reached or exceeded, the gas escapes from tube 58 in bubble form. This design particularly reduces the risk of

Gas is unintentionally escaping through a leak.

The overpressure valve 50.6 according to Figure 8f) comprises a controllable

A switching valve 61 and a pressure sensor 60 are located in the supply line 52 to the controllable switching valve 61. The signals from the pressure sensor 60 are forwarded to an electrical comparator or a processor. If the

The comparator or processor, or even the pressure sensor 60 itself, detects the event that the pressure in the supply line 52 is above the overpressure limit.

If the pressure drops below the overpressure threshold, it activates the switching valve 61 and opens it. If the pressure falls below the overpressure threshold again, it closes the valve.

Switching valve 61 again. Optionally, a signal for the measured pressure and/or a message that the overpressure limit has been exceeded is forwarded to an output unit (not shown) 20201023LU 04.11.2020, preferably in conjunction with | j192192 a marking of the position of the overpressure valve 50.6 in the

Hospital. The output unit displays the measured pressure or the message in a form perceptible to a human. This output unit can be located spatially separate from the intake setup 100, for example, in a central control room.

In the overpressure valve 50.7 (see Figure 8g), a kind of duckbill 62 is attached to the valve crater 52. At a pressure above the overpressure-

The barrier opens the duck's beak 62 and closes again under lower pressure.

The following two undesirable events, both of which could lead to harm to patient P, must be prevented: — Backflow occurs in supply line 6, for example because the

Filter element 11 has absorbed a large amount of anesthetic and is therefore partially clogged; due to fluid; or because the

Anesthesia machine 1 has currently expelled a relatively large amount of gas into supply line 6. This backflow could propagate into anesthesia machine 1 and affect the ventilation circuit. — Through supply line 6 and exhaust line 8,

Excess gas is extracted from the anesthesia machine 1, for example because the anesthesia machine 1 has currently emitted relatively little gas into the supply line 6.

The overpressure valve 50, described with reference to Figures 4 to 8, prevents overpressure that can occur, for example, due to backflow. To prevent both undesirable events, a

The buffer storage tank 19 is designed with at least one opening 21, preferably several openings 21, in the wall of the pot 13, in a fluid connection with the environment. If several openings 21 are present, the

Fluid connection is maintained even if an opening 21 becomes blocked, for example, because an object has been sucked in. The design in which at least one opening 21 is embedded in the wall of the buffer storage tank 19 is particularly useful in combination with a suction inlet, i.e., with a 20201023LU 04.11.2020

Suction pump 10, which draws gas into the discharge line 8, see Figure 1. If| 192192

Excess gas enters the buffer storage tank 19 exclusively through the anesthesia device 1 exhausting the excess gas; therefore, if no suction is performed, the buffer storage tank 19 preferably has no permanent

Fluid interaction with the environment.

It is possible to use both the overpressure valve 50 and the openings 21 in the

to provide the wall of the pot 13, or only the overpressure valve 50, or only the openings 21. The openings 21 are shown as examples in Figures 2 to 4, 10, 11, and 14 to 17, and the openings 21 are shown in Figures 5 to 7.

Overpressure valve 50.

As already mentioned, in one implementation form the buffer storage 19 is located in the rigid pot 13 via at least one opening 21 with the environment in a

Fluid connection. The rigid buffer storage tank 23 below the pot 13 or downstream of the pot 13 is located in a realization form over at least one

Opening 24 is connected to the environment via a fluid interface. Excess gas can escape through this opening 21 or 24 between the buffer storage tank 19, 23 and the

The surroundings flow back and forth. This is shown in Figures 2 to 24 by dashed lines.

Arrows indicated.

In a modified version, a pressure relief valve 50 is arranged in front of or at the location of the opening 24 in a wall of the buffer storage tank 23. This valve opens when the pressure in the buffer storage tank 23 exceeds a predetermined pressure threshold. This pressure relief valve 50 can be constructed as described with reference to Figure 8.

Figures 20 to 24 show an embodiment with a rigid buffer storage tank 23, which is in fluid communication with the environment via an opening 24 or a pressure relief valve 50 – in the case of the pressure relief valve 50, of course, only when the valve is open. It is also possible that the rigid buffer storage tank 23 is connected via the

Opening 24 is located in a fluid connection with an elastic buffer storage unit 70, i.e., a buffer storage unit with variable volume. This elastic

Buffer tank 70 can be constructed as described with reference to Figure 13. 20201023LU 04.11.2020

Figure 11 shows an alternative or supplement to the embodiment in which the interior of the pot 13 is always in fluid communication with the environment via the openings 21. This alternative reduces the amount of anesthetic that escapes from the pot 13. Furthermore, the alternative described below ensures that the pressure in the pot 13 is no more than a predetermined vacuum threshold below the pressure in the environment surrounding the pot 13. Excessive vacuum is often undesirable because it:

Gas can be aspirated from anesthesia machine 1. The following is described

Design to avoid excessive negative pressure in pot 13 is: particularly useful in conjunction with a suction, i.e. with a ;

Suction pump 10, which draws gas into the discharge line 8. If the pot 13 has at least one opening 21, an unwanted negative pressure can occur, especially if the opening or any opening 21 is blocked. A worn or clogged filter 11, 20 can also lead to excessive negative pressure during suction.

A vacuum valve 80 covers the openings 21 in the casing wall of the /

Pot 13. This vacuum valve 80 opens when there is a

The negative pressure is greater than the negative pressure barrier, i.e., when the pressure in

Pot 13 is at a pressure greater than the vacuum barrier below ambient pressure. Otherwise, the vacuum valve 80 is closed. The openings 21 limit the maximum volume flow into pot 13. They may be part of the vacuum valve 80.

In one configuration, a spatially remote alarm unit is used.

An alarm is displayed or otherwise issued as soon as the negative pressure

Valve 80 has opened. For example, this alarm is triggered at a central control room. In response to this alarm, a user can check pot 13.

Figure 12 shows seven different possible forms of realization of the

Vacuum valve 80 from Figure 11. Figure 12 shows an example of part of the

The outer wall of the pot 13 and a covered opening 21 are shown. Each shown embodiment of the vacuum valve 80 corresponds to a 20201023LU 04.11.2020

Implementation of the overpressure valve 50, shown in Figure 8. Same | 102192

Reference symbols in Figure 12 have the same meaning as in Figure 8.

In the configuration according to Figures 2 to 17, the supply line 6 leads into the pot supply line 16, which runs vertically or diagonally along the inner wall of the pot.

pot 13 is led and the one outlet opening 14 near the bottom 39 of the

Cartridge 20 has. In the mantle surface 43 and near the bottom 39 of the

Cartridge 20 has an inlet opening 25. Excess gas, which has been expelled by the anesthesia machine 1, flows through the supply line 6 and the...

Opening 22.1 in the pot 13 leads into the pot supply line 16. This gas is generally heavier than air. Therefore, the expelled excess gas flows downwards in the vertically or diagonally arranged pot supply line 16. The expelled...

Excess gas flows through gas lines 6 and 16 to outlet 14 and enters the anesthetic filter 11, 20 through inlet 25. This:

Excess gas is expelled from the medical device 1 and/or drawn in by the suction pump 10 and passes through the filter element 11, the excess gas being forced along a preferably serpentine path, thereby filtering out anesthetic from the gas.

The filtered excess gas exits the cartridge through an outlet opening 34, flows through the inlet opening 35 into the pot's discharge line 32, and passes through an opening 22.2 in the pot 13 into the discharge line 8 and from there into the gas intake 7.

In the configuration shown in Figures 2 to 17, the buffer storage tank 19 is separated by a space between the inner wall of the pot 13 and the:

The outer wall of the cartridge 20 is formed. This space 19 borders both the outer surface and the bottom 44 of the pot 13.

Figure 13 shows three possible implementation forms of a buffer storage tank 70, which is in fluid connection with the supply line 6 and is arranged in series and upstream of the filter unit 4. This buffer storage tank 70 is present in all .

Implementation forms constructed from an elastic material. If a sufficient amount of gas flows into the supply line 6 and a sufficiently high pressure is thereby present, the elastic buffer storage 70 is stretched, and the greater the stretching, the greater the pressure in the supply line 6. (20201023LU 04.11.2020)

- 54 / 80 -

As the pressure decreases, the elastic buffer storage tank 70 contracts again Lu102192 and releases the absorbed gas back into the supply line 6.

It is also possible that the elastic buffer storage tank 70 is in a fluid connection with the discharge line 8. It is also possible that a first elastic

Buffer storage tank 70 in fluid connection with the supply line 6 and a second elastic buffer storage tank 70 in fluid connection with the discharge line 8 is located.

According to the implementation shown in Figure 13a), the feed line 6 has a ;

Connection piece 71, which is preferably arranged below the supply line 6 or the discharge line 8 and points downwards (the anesthetic is heavier than air). A buffer storage tank 70 is connected to this connection piece 71.

Shape of an elastic bag 70.1. At high pressure, gas flows out of the

Supply line 6 / discharge line 8 passes through the connector 71 into the bag 70.1 and expands it. As the pressure decreases, the bag 70.1 contracts again and releases the absorbed gas back into the supply line 6 /

Drain line 8 off. Preferably, the connecting piece 71 has a standardized ‘

Diameter of 22 mm. A bag for manual ventilation can preferably be used as bag 70.1, because such manual ventilation bags are already standardized and approved for medical use.

In the embodiment shown in Figure 13b), a section of the supply line 6 or the discharge line 8 is completely or at least partially surrounded by a buffer storage unit 70 in the form of an elastic bag 70.2.

Section of the feed line 6 or the discharge line 8 has holes or other '

Openings so that the bag 70.2 is in a fluid connection with the ,

The elastic bag 70.2 À completely covers the openings in the feed line 6 or the discharge line 8. Again, the elastic bag 70.2 stretches under high pressure and contracts under low pressure.

In the embodiment shown in Figure 136, the elastic buffer storage device 70 has the form of a bellows 70.3, which is connected via a connecting piece 72 to the supply line 6 or the discharge line 8 in a fluid connection.

Bellows 70.3 expands along a longitudinal axis under high pressure and contracts again under lower pressure. The bellows À

70.3 can be located above, below, or laterally on the supply line 6 Lu102192 or the discharge line 8.

In the embodiment according to Figure 20 and Figure 21, the buffer storage 23 is formed by a separate buffer storage, which preferably has a meandering shape:

The tube comprises an inlet opening 30 located in the upper third of the cartridge 20, and an outlet opening 34 located in the bottom 39 of the cartridge 20.

Buffer tank 23 is in fluid contact with pot 13 via an opening 26. This opening 26 overlaps with the outlet opening 34. Thanks to the

The outlet opening 34 in the base 39 of the cartridge 20 houses the buffer storage 23, which is also in fluid connection with the anesthetic filter 11, 20. Furthermore, the

Buffer storage tank 23 in fluid connection with the discharge line 8 and via the

Opening 24 is in fluid contact with the environment. The meandering pipe leads from opening 26 to opening 24.

Expelled excess gas flows through the supply line 6 and reaches the inlet opening 30 in the cartridge 20 from the side. The excess gas flows from top to bottom through the anesthetic filter 11, 20 and exits into the

Outlet opening 25 again from the anesthetic filter 11, 20. As soon as the

When the suction pump 10 draws in gas, this gas is drawn back out of the buffer storage tank 23 through the discharge line 8. The buffer storage tank 23 therefore operates according to the LastIn — FirstOut principle. The meandering shape of the

Buffer storage tank 23 achieves a long pipe with relatively small dimensions.

The long pipe reduces mixing of the expelled material

Excess gas with the ambient air.

Filter element 11 absorbs anesthetic and thus gradually becomes clogged and/or saturated. If filter element 11 is largely clogged or saturated and therefore can no longer absorb any more anesthetic, or if it is swollen, filter element 11L or the entire anesthetic filter 11, 20 must be replaced. The optional...

Consumption indicator 17 displays this event in many cases. The cartridge . 20 with the filter element 11 and the display unit 16, 17, 18 is removed from the .

Pot 13 removed. Figures 3, 10 and 15 show the situation after.

Removal of cartridge 20. The artificial ventilation of patient P must not be interrupted while cartridge 20 with filter element 11 Lu102192 is being replaced. Therefore, the fluid connection between the Ë

Anesthesia machine 1 and gas intake 7 are maintained. Even if no Ê

When cartridge 20 is inserted into pot 13, a large [something] is prevented;

Amount of emitted gas escapes into the environment.

In the embodiment according to Figures 2 to 10, this is achieved pneumatically, namely by drawing in excess gas; in the embodiment Ë according to Figures 14 to 17, it is achieved mechanically, namely by a spring-mounted ;

Plate 31, in the embodiment according to Figures 20 and 21 as well as Figure 24; by the meandering shape of the buffer storage 23 and in the embodiment according to Figures 22 and 23 by a combination of the spring-mounted à

Plate 31 and the meandering shape of the buffer storage 23. The elastic buffer storage 70 of Figure 13 also prevents, up to a certain point,

The fact that a large amount of [something] occurs when replacing cartridge 20.

Anesthetic leaks into the surrounding area. f

In the pneumatic solution according to Figures 2 to 10, the

Excess gas in the space 19 between the pot 13 and the cartridge; 20. If a suction pump 10 is present, this gas is drawn from the bottom É 44 of the pot 13 through the discharge line 8. The ;

The inlet opening 35 into the pot drain line 32 preferably has a larger size!

Cross-sectional area as the total cross-sectional area of the openings 21 in the .

Pot 13. In particular, this is why, even when the volume flow through the supply line 6 oscillates over time, it is ensured that only a small part of the:

Excess gas escapes from the pot 13 upwards or through the openings 21 into the environment.

Preferably, the gas is guided through the filter unit 4 by means of a forced flow. This forced flow is described below with reference to Figure 4 to

Figure 10 (pneumatic solution) and Figures 14 to 19 (mechanical)

Solution) explained.

A wall 38, which is impermeable to fluid, is inserted into the interior of the filter 11, 20. This wall 38 preferably extends at a distance parallel to the central axis of the filter 11 and preferably has the form of a flat surface or a surface curved along a vertical axis. The wall 38 divides the cartridge 20, and thus the filter element 11 within the cartridge 20, into an ascent region Au and a descent region Ab for the gas, see Figure 9. Viewed in a direction parallel to the central axis of the filter 11, 20, both the ascent region Au and the descent region Ab each have the form of a circular segment. The ascent region Au is located in...

Fluid connection with the inlet opening 25. The bottom 39 of the cartridge 20 is: in this realization, at least in the descent area Ab, permeable to gas, functions as the outlet opening and thus replaces the outlet opening 34 in the

Mantle surface 43. The descent area Ab leads into this permeable

Floor 39.

The gas from the supply line 6 is forcibly guided through the filter unit 4 as follows: Gas is expelled from the medical device 1 and/or drawn into the discharge line 8©, just as in the other embodiments. The gas flows through the pot supply line 16 and through the...

through exit opening 14 and inlet opening 25 into the ascent area f

Au, which is located between the wall of the cartridge 20 and the vertical wall 38. There is a gap between the wall 38 and the lid 42 of the cartridge 20. Through this gap, the gas from the rising area Au passes into the descending area Ab, without the

to exit pot 13. The gas flows through the descent section Ab to the permeable bottom 39 and then through the pot discharge line 32 to the discharge line 8. The gas is preferably carried out both in the

Ascending area Au as well as in relegation area Ab, but at least in the

Descent zone Ab, filtered.

Two lower sealing elements 40 or a circumferential sealing ring 40 prevent drawn-in gas from the pot supply line 14 from escaping past the cartridge 20 through the space between the bottom 39 of the cartridge 20 and the

The gas would flow through the bottom 44 of the pot 13. This gas would flow past the filter 11, 20 and therefore would not be filtered, which is undesirable.

In the mechanical solution according to Figures 14 to 19 and Figure 22, a plate 31 is mounted near the bottom 44 of the pot 13. This plate 31 switches the gas path depending on whether the cartridge 20 is inserted or removed. In a preferred embodiment, the plate 31 occupies the entire cross-sectional area of the pot 13—except for the pot gas lines 16 and 32 and unavoidable gaps. The plate 31 divides the

The interior of the pot 13 is divided into a filter cavity 36 and a buffer storage tank.

Cavity 37. The filter cavity 37 is located above the plate 31 and is capable of accommodating and surrounding the filter 11, 20. The buffer storage- \

Cavity 36 is located between plate 31 and the base 44 and belongs to a buffer storage tank, which is described below. A circumferential sealing ring 40 surrounds the periphery of plate 31.

The supply line 6 is positioned above the pot supply line 16 and the opening 14 in

Fluid connection with the inserted cartridge 20. The discharge line 8 extends via the opening 35 and the pot discharge line 32 in fluid connection with the inserted cartridge 20. The plate 31 can be positioned between a parking

Position (Figure 14, Figure 16, Figure 18, Figure 22) and a buffer storage ,

Move position (Figure 15, Figure 17, Figure 19) back and forth. If the

When cartridge 20 is inserted, the plate 31 is in the park position, and the cartridge 20 is in fluid connection with the ;

Supply line 6 and discharge line 8 or only with discharge line 8 (Figure 22). The plate 31 and the sealing ring 40 prevent gas from escaping the

The supply line 6 flows past the cartridge 20 into the discharge line 8. When the cartridge 20 is removed, the plate 31 is in the buffer storage tank.

Position, and the buffer storage cavity 36 is located in each of ;

Fluid connection with the supply line 6 and the discharge line 8. The sealing ring 40 prevents or at least reduces the risk of gas escaping from the

Buffer storage cavity 36 escapes upwards and enters the environment.

One embodiment of how the plate 31 is moved is described below. This embodiment results in a particularly simple mechanical design. Several spring elements 33 are supported on the

bottom 44 of pot 13 off and are trying to move plate 31 against the

Gravity upwards, i.e. away from the bottom 44 of the pot 13 and into the

Buffer tank position, press and hold. If the 20201023LU 04.11.2020

When cartridge 20 is inserted into pot 13, plate 31 is moved against the LU102192

Spring force of the spring elements 33 pushes downwards into the park position. Ë

This effect is caused by the weight of cartridge 20 — or by a user pressing cartridge 20 downwards in pot 13. If the:

When cartridge 20 is removed again, the spring elements 33 press the

Plate 31 moves upwards into the buffer storage position until it reaches the lower end of the pot gas lines 16 and 32. In conjunction with the sealing ring 40, plate 31 largely prevents excess gas from escaping upwards from the pot 13 into the environment. It is possible that a locking mechanism (not shown) holds plate 31 in position.

Figures 18 and 19 show a further embodiment of the mechanical

Solution of the buffer storage 19. Identical reference symbols have the same '

Meaning as in Figures 14 to 17. Again, a plate 31 subdivides the ;

The interior of the pot 13 is divided into a filter cavity 37 and a buffer storage tank.

Cavity 36. The plate 31 thus separates a buffer storage tank 19 from an inserted filter 11, 20. This buffer storage tank 19 is located between the plate 31 and the bottom 44 of the pot 13. In the embodiment shown in Figures 18 and 19, no opening 21 is provided in the wall of the pot 13. This embodiment is preferably used in an application without a suction pump 10.

A slide 48 inside the pot 13 is firmly connected to the plate 31 and can be moved up and down together with the plate 31 between a buffer storage position (Figure 19, no filter 11, 20 inserted) and a park position (Figure 18, filter 11, 20 inserted in the filter cavity 37 in the pot 13).

The spring elements 33 tend to move the plate 31, together with the slide 48, upwards into the buffer storage position. The weight of the inserted filter 11, 20 and optionally a component inserting the filter 11, 20

Users press the plate 31 and thus the slider 48 downwards against the spring force of the spring elements 33 into the park position.

At the lower end of the pot feed line 16 are two outlet openings 14 and 14.1, which are subsequently referred to as filter outlet openings and .

The buffer tank outlet opening is designated as such. The filter outlet opening 20201023LU 04.11.2020

- 60 / 80 - 14 is located above the buffer tank outlet opening 14.1. If a LU102192

When filter 11, 20 is correctly inserted (Figure 18), the filter outlet opening 14 overlaps with the inlet opening Ë 25 of the cartridge 20, just as in the previous embodiments. The filter outlet opening 14 of the pot feed line 16 thus leads into the inlet opening 25 of filter 11, 20. The downwardly pressed Ë

Slide 48 releases the filter outlet opening 14 and blocks the f

Buffer tank outlet opening 14.1. If no filter 11, 20 is installed and the slide 48 is in the buffer tank position (Figure 19), then the pot- :

Supply line 16 passes through the buffer storage outlet opening 14.1 and connects to the buffer storage 19 in a fluid connection. The buffer storage-

Outlet opening 14.1 leads into the buffer storage tank 19. The slide 48, pushed upwards, releases the buffer storage tank outlet opening 14.1 and blocks the filter outlet opening 14.

The same applies to the pot drain line 32. At the lower end of the

Pot drain line 32 is located below the filter inlet opening 35:

Buffer storage inlet opening 35.1 is inserted. If a filter 11, 20 is inserted and the slide 48 is in the park position, the filter overlaps

Inlet opening 35 with outlet opening 34 of cartridge 20. The

The outlet opening 34 of the filter 11, 20 thus leads into the filter inlet opening 35 of the pot's discharge line 32. The downward-pressed slide 48 releases the filter

Inlet opening 35 is free and blocks the buffer storage inlet opening 35.1.

If no filter 11, 20 is installed, the pot discharge line 32 is in fluid contact with the buffer storage inlet opening 35.1.

Buffer tank 19. Buffer tank 19 therefore leads into the buffer tank-

Inlet opening 35.1 of the pot, drain line 32. The upwardly pressed

Slide 48 releases the buffer storage inlet opening 35.1 and blocks the

Filter inlet opening 35.

If the plate 31 and the slide 48 are in the park position (Figure 18), gas flows through the pot supply line 16 and the openings 14 and 25 into the filter element 11 and then through the openings 34 and into the pot discharge line 32. The slide 48 prevents gas from entering the buffer storage tank 19. If the plate 31 and the slide 48 are in the

The buffer storage position is (Figure 19), so gas flows through the pot- À

Supply line 16 and opening 14.1 through into the buffer tank 19 and LU102192 through opening 35.1 into the pot discharge line 32. The plate 31 largely prevents gas from escaping upwards from the buffer tank 19.

Figures 22 and 23 show an embodiment which combines the spring-mounted plate 31 from Figures 14 to 17 with the buffer storage 23 from .

Figures 20 and 21 are combined and also include the pot feed line 16. In the situation shown in Figure 22, the cartridge 20 is connected to the

Filter element 11 is inserted; in the situation shown in Figure 23, it is removed. A sealing element or a sealing ring 40 is attached to the plate 31. Furthermore, another circumferential sealing ring 40 is attached to the inside of the pot 13. The pot feed line 16 and a bracket 45 hold this

Sealing ring 40 in a suitable position.

Plate 31 is in the park position in Figure 22 and in the [position] in Figure 23.

Buffer storage position. A circumferential ridge at the bottom of plate 13 prevents gas from escaping when plate 31 is in the park position.

The supply line 6 passes under the plate 31 and flows into the discharge line 8.

This prevents gas from bypassing the anesthetic filter 11, 20.

Rather, the gas flows through opening 22.1 and is initially carried into the

The fluid in the space between the pot 13 and the cartridge 20 is directed upwards through the pot supply line 16 to the inlet opening 25, then flows through the filter 11, 20 and reaches the outlet opening 34.

Through opening 22.2 it flows into the discharge line 8. .

When cartridge 20 is removed and plate 31 is in the buffer storage-

In the position shown in Figure 23, the sealing element 40 on the plate 31 and the sealing ring 40 inside the pot 13 prevent the undesirable occurrence of gas from the buffer storage cavity 36 flowing upwards past the plate 31 and escaping into the environment. Instead, the plate 31 separates the buffer storage cavity.

Cavity 36 is largely separated from the surroundings.

In this modification as well, an opening 26 is provided in the base 44 of the pot 13, and the pot 13 is in fluid communication through this opening 26 with a rigid buffer storage tank 23, which comprises a meandering pipe.

The inlet opening 25 of the cartridge 20 is located near the lid 42 of the cartridge 20, and the outlet opening 34 is located near the bottom 39 of the cartridge 20. The Lu102192

Sensor 15 and measuring lead 18 are arranged near the lid 42 of the cartridge 20. When the cartridge 20 is inserted into the pot 13, the

Plate 31 is pressed downwards against the force of spring 33, thereby directing the gas into the cartridge 20. When the cartridge 20 is removed, the springs 33 push plate 31 upwards without the plate 31 tilting. When the cartridge 20 is inserted, gas can flow around plate 31 into the buffer storage cavity 36 and from there into the buffer storage tank 23 and back again, thus realizing the function of a buffer storage tank.

Figure 24 shows an embodiment in which the rigid buffer storage tank 23 is arranged downstream of the filter unit 4 and is in a fluid connection with the discharge line 8. The term 'downstream' refers to the direction of gas flow in front of the medical device 1 towards the

Fluid intake 7. The buffer storage tank 23 can also be located upstream from the

Filter unit 4 is arranged and in a fluid connection with the ;

Supply line 6 is standing.

The design according to Figure 24 makes it possible to make the filter unit 4 smaller and/or the filter 11, 20 larger than in the design according to Figures 2 to /

Figure 19, as well as Figure 22 and Figure 23, need not be designed because a cavity acting as a buffer reservoir is not necessarily required between the cartridge 20 and the pot 13. Furthermore, the vertical

Smaller dimensions compared to the previously described designs.

The discharge line 8 runs through the buffer storage tank 23. Via the

Filter unit 4 also connects the buffer storage tank 23 to the fluid.

Supply line 6. The volume flow sensor 9 and the suction pump 10 are preferably located downstream of the buffer storage tank 23.

In the embodiment according to Figure 24, the buffer storage tank 23 is arranged downstream of the filter unit 4. In the modification shown in Figure 13, the

Filter unit 4 is also arranged upstream or downstream of the elastic buffer storage tank 70. This modification is also dated 20201023LU 04.11.2020

- 63 / 80 - preferably the optional volume flow sensor 9 and the suction pump 10 LU102192 . arranged downstream of the filter unit 4. ,

The embodiments described so far include a sensor 15 that measures the quantity or concentration of the anesthetic agent within the cartridge 20. As soon as this quantity or concentration exceeds a predetermined anesthetic agent threshold, the filter element 11 no longer filters enough anesthetic agent from the flowing gas. Then a

An alarm is triggered on the consumption display 17. An alarm is also preferably triggered if the overpressure valve 50 has opened. One possible reason for the overpressure valve 50 opening is that the filter element 11 has become clogged, for example because the

Filter element 11 has swollen due to moisture.

The consumption indicator 17 can be located on the filter unit 4 or on the ;

Pot 13 may be located there. It is also possible that a consumption indicator or an alarm unit is located at a remote location, for example in a central control room. An alarm is displayed in the central control room if sensor 15 has measured a high concentration of anesthetic or if the

The overpressure valve 50 has opened, and it is therefore necessary to check the filter 11, 20 and replace it if necessary.

An alternative implementation method avoids the need for a

Sensor 15 is not intended to measure the quantity or concentration of anesthetic inside the pot 13. Rather, the quantity of anesthetic flowing through the supply line 6 to the anesthetic filter 11, 20 is determined approximately. According to one possible implementation, the current volume flow into the

The volume of gas delivered by the anesthesia machine 1 into supply line 6 is measured. Alternatively, the current volume flow rate is determined in another way. Furthermore, the following is measured approximately or determined in another way:

The concentration of the anesthetic currently present in this gas stream is calculated from these two values. The volumetric flow rate of the anesthetic passing through supply line 6 at a specific sampling time (20201023LU 04.11.2020) is calculated.

Filter unit 4 flows and is ideally completely absorbed by filter element 11 LU102192. Numerical integration is performed using these values for the anesthetic volume flow. This procedure provides an approximate value for the /

Amount of anesthetic absorbed by filter element 11 to date. The approximate value calculated in this way may be larger than the actual amount absorbed, especially if the overpressure valve 50 opens temporarily or if at least one leak occurs between the:

Anesthesia machine 1 and filter 11, 20 occur.

In an alternative embodiment, the quantity of liquid anesthetic in the anesthetic tank 49 is repeatedly measured. This quantity decreases over time because anesthetic from tank 49 is added to the carrier gas. A portion of the anesthetic leaving tank 49 is added to the carrier gas, for example by evaporation, and enters the supply line 6. The quantity of anesthetic that has left tank 49 so far represents an upper limit for the quantity of anesthetic that the filter element 11 has absorbed to date.

The two configurations just described can be combined, especially to reduce inaccuracy.

Preferably, the value for the amount taken in is set to zero when a new filter 11, 20 is inserted into the pot 13. For example, the filter 11, 20 comprises a data carrier 92, for example an RFID chip, wherein the data carrier 92 is preferably arranged on an outer wall of the cartridge 20. The intake arrangement 100 comprises a read and

Writing device for such a data carrier, for example an RFID reader and

Writing instrument. In an alternative configuration, a user inputs data using a stationary or portable computer or by means of some other device.

The input unit receives the information that a new filter 11, 20 is being inserted into pot 13.

In one embodiment, the predetermined concentration is determined, which is set on the anesthetic vaporizer 2, see Figure 1. In another

The actual concentration of anesthetic agent is measured at at least one measuring point in the anesthesia machine 1. 20201023LU 04.11.2020 /

- 65 / 80 -

The anesthetic vaporizer 2 typically includes a reservoir 49 for LU102192 liquid anesthetic. In one embodiment, a fill level sensor measures a

MaR for the amount of liquid anesthetic in this tank. From the ;

The readings from this fill level sensor are used to determine how much liquid anesthetic has evaporated so far.

Quantity is an upper limit for the amount of anesthetic, which means that;

Filter element 11 has recorded so far. Ë

In one embodiment, the anesthesia device 1 is only in one

During the expiratory phase, anesthetic is released into supply line 6. Therefore, only values from such sampling points are used when calculating the amount of anesthetic;

It takes into account time points that fall within an expiration phase. Such a

The procedure is described, for example, in DE 10 2006 027 052 B3. In another embodiment, the supply of breathing air or other fresh gas is so large that the anesthesia device 1 can also function during an inspiration phase.

releases anesthetic.

In one embodiment, the information is stored in a data storage device: the maximum amount of anesthetic that the filter element 11 can absorb, for example in the data storage device 92 just described at the

Outer wall of cartridge 20. This quantity is predetermined. A comparator repeatedly compares the quantity of anesthetic that this filter element 11 has absorbed so far, and which is calculated approximately as just described, with the predetermined and stored value.

The maximum amount that filter element 11 can hold. As soon as the actual amount held differs from the specified and stored maximum amount by less than a predefined absolute or percentage threshold, a warning is issued in a human-perceived form, for example on a spatially remote output unit, which is preferably located in a central location.

Figure 25 illustrates an exemplary embodiment, with the corresponding components added compared to the arrangement in Figure 1. Identical components have the same reference numerals as in Figure 1. LU102192

Additionally shown are: — a level sensor 89, which provides a measure for the current fill level in the ;

Anesthetic tank 49 measures and, for example, a swimmer on the

surface of the anesthetic in tank 49 and/or a scale includes, — a volume flow sensor 90 belonging to the anesthesia device 1 and the ;

volumetric flow rate, i.e., the volume per unit of time, of gas measures the

anesthesia device 1 into the supply line 6, } — a concentration sensor 91 that measures the concentration of anesthetic agent Ë, which is set at the anesthetic vaporizer 2 or which the

Anesthetic vaporizer 2 actually achieved, — the data storage 92 of a filter 11, 20 of the filter unit 4 and — a data-processing anesthetic quantity determiner 93. ,

Figure 25 shows an example of a check valve 65, which is arranged between the anesthesia device 1 and the receiving assembly 100 À, i.e., upstream of the supply line 6. The check valve

Valve 65 allows gas from anesthesia machine 1 to pass through, but prevents it from

Gas from supply line 6 can flow into the anesthesia machine 1.

In particular, no gas can flow from the fluid intake 7 into the anesthesia machine 1'.

In the example shown in Figure 25, a

Information is stored about the maximum amount of anesthetic that filter element 11 can hold. This maximum amount can be described as

The volume of the gaseous or liquid anesthetic agent, or its weight, can be specified.

The anesthetic quantity detector 93 receives readings from sensors 89, 90 and 91 and information about the maximum quantity from the

Data storage 92. The anesthetic quantity determiner 93 calculates, as just described, a measure of the quantity of anesthetic that the

Filter element 11 compares the amount recorded so far with the maximum amount and issues a warning, À 20201023LU 04.11.2020, if the amount recorded so far is close to the maximum amount of LU102192.

Filter element 11 is located.

In one embodiment, the anesthetic quantity detector 93 is in the ;

The anesthesia device 1 implements what is indicated in Figure 25. It is also possible that the anesthetic quantity detector 93 is implemented on a separate computer, for example on a smartphone.

One embodiment takes into account the possibility that the same filter element 11 can hold different anesthetics sequentially or simultaneously. For example, it is possible that the holding arrangement 100 is used consecutively in different operations where different anesthetics are used. It is also possible that the holding arrangement 100 is used in an operation where a mixture of several anesthetics is administered.

According to this configuration, the data storage device 92 contains the information about the maximum quantity of a reference anesthetic that the |!

Filter element 11 can hold a maximum of 11. Furthermore, for each

For each anesthetic where filter element 11 can be used, a conversion factor is stored, either in data storage 92 or in another data storage. Filter element 11 can be used with a...

to absorb a maximum amount of anesthetic equal to the product of the conversion factor and the maximum amount of the reference dose;

It is an anesthetic.

The anesthetic quantity detector 93 receives measured values from sensors 90 and 91 during operation, and information from data storage 92 regarding the maximum quantity of the reference anesthetic, the conversion factors, and information on which anesthetic agent U is used during which period. The anesthetic quantity detector 93 is, for example, in a data connection with the anesthesia machine 1, and the anesthesia machine 1 transmits to the anesthetic quantity detector 93 the information about which anesthetic agent is currently being used and therefore flows, or could flow, through the filter element 11. 20201023LU 04.11.2020

The anesthetic quantity calculator 93 calculates, as just described LU102192: for each anesthetic used, what quantity of this anesthetic the )

Filter element 11 has recorded so far. Based on the reciprocals of the

The anesthetic quantity calculator 93 calculates conversion factors for each possible anesthetic, based on the quantity of that anesthetic taken so far.

anesthetic is converted into the corresponding amount of the reference anesthetic.

The anesthetic quantity determiner 93 adds up the corresponding quantities of the reference anesthetic and thereby calculates an equivalent total quantity of the reference anesthetic ingested. The ;

Filter element 11 is used up and must be replaced when this

The sum of the equivalent sets is the maximum set of the reference set.

anesthetic agent reached or exceeded.

The amount of anesthetic that a filter element 11 can absorb depends in many cases not only on the type of anesthetic, but also on the operating conditions. In one embodiment, the conversion factor for an anesthetic just described also depends on at least one of the following measurable operating conditions: — the temperature, pressure and/or humidity of the gas flowing through the filter element 11, — the concentration of the anesthetic in this gas, — the temperature, pressure and/or humidity of the surrounding air.

In one embodiment, the warning that filter element 11 is almost or completely depleted is displayed as a traffic light. Green means that the actual amount ingested is more than a predefined amount below the maximum amount. Yellow means that the actual amount ingested is still below the maximum amount, but by less than the predefined amount. Red means that the actual amount ingested has reached or exceeded the maximum amount. In another embodiment, the amount of an anesthetic ingested so far is displayed as a percentage of the maximum possible amount of that anesthetic, for example, separately for each anesthetic. 20201023LU 04.11.2020

The configuration just described uses information about LU102192: maximum possible amount of anesthetic that the currently used

Filter element 11 can receive this information. In one embodiment, this information about the maximum quantity is stored on the data storage device 92 of the filter 11, 20 used. A reading device of the receiving arrangement 100 is able to read this data storage device. In another embodiment, a

The reader indicates the type of filter used (11, 20). In a

The data storage contains the respective maximum amount of anesthetic that a filter unit of this type can hold for each possible type of filter unit 4.

In one configuration, the reading and writing device stores data in the

Data storage device 92 records, for each anesthetic used, the quantity of that anesthetic that filter element 11 has absorbed so far. This information is preferably updated continuously. This:

Information can later be used to reprocess filter element 11 and/or to recover data from filter element 11:

To obtain anesthetics. Process steps in the processing of a

Filter element 11 can depend on the type and quantity of the absorbed:

The anesthetic depends on the medication.

Optionally, information about the amount of data recorded so far is also stored in data storage 92 or in a central data storage.

Reference anesthetic is stored. This information is preferably updated continuously, so that a time-dependent trend of the amount of anesthetic consumed can be recorded.

A reference anesthetic is produced. This temporal profile makes it possible to predict—approximately—the remaining service life of filter element 11.

In one configuration, the data storage device 92 or a central one is used.

The data storage system records the amount of each anesthetic administered to date. This recording is preferably repeated after each operation or other use of filter 11, 20. Before or at the beginning of an operation, the amounts administered to date are read out or determined by other means. The difference between the administered amounts (20201028LU 04.11.2020)

The quantities before and after the operation provide a measure of the consumption during the operation.

In all previously described embodiments, the filter unit 4 comprises a single filter element 11, optionally in a cartridge 20. Figure 26 shows an exemplary embodiment in which the filter unit 4 has two filter elements 11.1 and 11.2, each in a cartridge 20.1, 20.2. Reference numerals have the same meanings as in the previous figures.

The two filters 11.1, 20.1 and 11.2, 20.2 are divided into two corresponding f

A receiving unit 71 is inserted, wherein the receiving unit 71 has the form of a turret and is rotatable about a pivot axis 73. The pivot axis 73 is rotatably connected to the outer wall of the pot 13 and lies in the plane of Figure 26. This allows either the filter 11.1, 20.1 or the filter 11.2, 20.2 to be selectively brought into a position f between the outlet opening 14 at the lower end of the pot feed line 16 and the lower end of the pot discharge line 32. This places either the filter 11.1, 20.1 or the filter 11.2, 20.2 in a position in which

Gas flows through the supply line 6, through this filter 11.1, 20.1 or 11.2, 20.2, and the discharge line 8. In the situation shown in Figure 26, gas can flow through the filter 11.1, 20.1 while the filter 11.2, 20.2 is in a ;

It is in park position.

Preferably, the receiving unit 71 locks into place when, relative to the pot 13, it is in a position in which the inlet opening 25 of the filter 11.1, 20.1 or 11.2, 20.2 overlaps with the outlet opening 14. This reduces the risk of gas bypassing a filter element 11.1 or 11.2.

It is possible for a user to manually rotate the recording unit 71 around the axis 73. In another embodiment, an optional motor 72 can rotate the

The receiving unit 71 is positioned relative to the pot 13 to rotate the axis 73. In a

In its design, the motor 72 can be controlled externally or by a

User input, for example by pressing a button, activates the motor 72. The controlled or activated motor rotates the recording unit 71 by one revolution.

Position further. This also allows for control via 20201023LU 04.11.2020

External activation causes either filter 11.1, 20.1 or Lu102192 to be selected.

Filter 11.2, 20.2 is in a position where it is being flowed through by gas.

In one implementation, a control unit receives measured values from the sensor 15 described above in the pot 13 and is able to control the motor 72. As soon as the sensor 15 detects a high concentration of

Once the anesthetic has been measured, the control unit activates motor 72, and motor 72 rotates the recording unit 71 one position further.

In one embodiment, the two filters 11.1, 20.1 and 11.2, 20.2 are identical in construction and are capable of filtering the same anesthetic agent or agents from a flowing gas. The receiving unit 71 is rotated manually or by motor 72 when a filter Ë is exhausted. In another embodiment, filter element 11.1 is capable of filtering out a first anesthetic agent, and filter element 11.2 a second one.

Anesthetic. Depending on which anesthetic is currently to be filtered out of a gas stream, filter 11.1, 20.1 or filter 11.2, 20.2 is used in a Ë

Positioned in which the inlet opening 25 overlaps with the outlet opening 14.

It is of course possible that the recording unit 71 includes recordings for more than two filters. It is also possible that the recording unit 71 cannot be rotated relative to the pot 13, but can be moved linearly or pivoted.

Alternatively, the intake arrangement 100 includes a diverter valve located between the supply line 6 and the pot 13. This diverter valve directs gas flowing through the supply line 6 selectively to the first

Filter 11.1, 20.2 or to the second filter 11.2, 20.2 or to an optional third filter not shown.

In the embodiments described so far, the invention is

The receiving arrangement 100 is connected to a single medical device 1. Figure 27 shows two alternative embodiments in which the same receiving arrangement 100 according to the invention is connected or connectable to two medical devices 1 and 1.1. Reference numerals have the same meanings as in the embodiments described above. 20201023LU 04.11.2020

In the configuration according to Figure 27a), the recording arrangement LU102192 ; 100 can be optionally connected to the medical device 1 or to the medical

Connect device 1.1. A cable 6.1 leads from medical device 1 to a:

Switch 96, which belongs to the receiving arrangement 100. A line 6.2 leads À from the medical device 1.1 also to the switch 96. In the position shown in Figure 27a), the switch 96 provides a fluid connection between the j

Line 6.1 and the feed line 6. The switch 96 can be configured as

Adjust the position in which it creates a fluid connection between line 6.2 of the

Supply line 6 is produced. )

In the embodiment according to Figure 27b), the receiving arrangement 100 comprises a Y-piece 97 instead of a switch 96. The two legs of this Y-piece 97 are connected to the two lines 6.1 and 6.2. The beam of the Y-piece ,

Piece 97 is connected to the supply line 6. Thanks to the Y-piece 97, both medical devices 1 and 1.1 are simultaneously connected to the inventive device.

Recording arrangement 100 connected.

In the embodiments described so far, the receiving arrangement : 100 is connected to a stationary fluid receiving unit 7 in a wall W. Figure } 28 shows two alternative embodiments in which the receiving unit-

Arrangement 100 optionally or simultaneously with the stationary one,

Fluid intake 7 or another stationary fluid intake 7.1 is connected or connectable.

In the configuration according to Figure 28a), a switch 98 connects the ,

Discharge line 8 optionally with a line 8.1 or with a line 8.2. The

Line 8.1 leads to the fluid intake 7, line 8.2 to the further

Fluid intake 7.1. In the position shown in Figure 28a), the filter unit 4 is connected to the fluid intake 7 via the lines 8 and 8.1.

In the configuration according to Figure 28b), the two legs of a Y- À

Piece 99 is connected to the two lines 8.1 and 8.2. The bar of the Y-

Piece 99 is connected to the discharge line 8. This means that the filter unit 4 is simultaneously in a fluid connection with both fluid intakes 7 and 7.1.

Thanks to this design, gas is also absorbed even if a stationary fluid intake 7, 7.1 is defective or does not absorb the entire quantity on its own.

Reference number list LU102192 1 Anesthesia device, including the anesthetic vaporizer 2, the

Mixer 29, the limescale filter 3 and the fan unit 5 2 anesthetic vaporizer in the anesthesia machine 1, includes the ;

Anesthetic tank 49

Limescale filter that filters CO2 out of exhaled air / 4 filter unit that filters out the gas delivered by the anesthesia machine 1

The anesthetic filter includes the activated carbon filter 11 in the

Cartridge 20, the cartridge 20 and the pot 13, connected to the supply line 6 and the discharge line 8

Fan unit of the anesthesia machine 1, which supplies gas in

Ventilation circuit moves ° | Supply line, leads from the anesthesia machine 1 to the filter unit 4 6.1, lines which connect the diverter 96 or the Y-piece 97 with the , 6.2 medical devices 1 and 1.1 7 'stationary gas intake of the hospital infrastructure, from the wall

W is absorbed, connected to the filter unit 4 via the discharge line 8; further stationary gas absorption, absorbed from wall W:

S| Discharge line, leads from filter unit 4 to gas intake 7 8.1, | Lines connecting the diverter 98 or the Y-piece 99 to the 8.2 | Gas intakes 7 and 7.1 ° | Volume flow sensor in the discharge line 8

Suction pump on the discharge line 8 or in the fluid intake 7, is in fluid connection with the discharge line 8. 11 cylindrical activated carbon filter of the filter unit 4, functions as

Filter element, surrounded by cartridge 20 20201023LU 04.11.2020

11.1, | cylindrical filter elements in the receiving unit 71 LU102192 12 circumferential projection of the cartridge 20, supported on the upper edge of the pot 13 13 pot into which the supply line 6 leads and from which the

The discharge line 8 leads out, functions as filter housing 14, outlet opening of the pot supply line 16, at the lower end of the pot:

Supply line 16 is arranged, overlapping with the inlet opening 25 when the cartridge 20 is inserted; 14.1 | Buffer storage outlet opening of the pot supply line 16, arranged below the outlet opening 14, is in fluid contact with the buffer storage 19 when no filter 11, 20 is inserted.

Sensor that measures the condition of the activated carbon filter 11 16 Pot supply line inside the pot 13, forms a fluid-tight

Continuation of supply line 6, conveys gas from supply line 6 to the

Bottom 44 of pot 13, ends in outlet opening 14

Consumption indicator for the activated carbon filter 11

Signal line from sensor 15 to consumption indicator 17 19 Buffer storage in the form of an intermediate space between the pot 13 and the cartridge 20 Cylindrical cartridge, surrounds the activated carbon filter 11, includes the circumferential projection 12, carries the data storage 92 20.1, | Cylindrical cartridge for the filter element 11.1, 11.2 20.2

Openings in pot 13, connected to the environment

Opening in pot 13, in which the supply line 6 ends

Opening in pot 13, in which the drain line 8 begins 20201023LU 04.11.2020

23 Buffer storage tank in the form of a meandering pipe, has the opening LU102192 24 24 Opening of the buffer storage tank 23, which is connected to the environment

Inlet opening near the bottom 39 or the lid 42 of the cartridge 20, overlaps with the outlet opening 14 26 when filter 11, 20 is inserted. Opening of the buffer storage tank 23, which aligns with the inlet opening 25 in

Connection is established

Inspiratory gas line to supply patient P with breathing air 28 Expiratory gas line to suction exhaled air from patient P 29 Mixer of the anesthesia machine 1, generates the carrier gas for the

Anesthetic

Inlet opening in the lid 42 of the cartridge 20 31 spring-loaded plate near the bottom 44 of the pot 13, divides / the pot into a filter cavity 37 and a buffer storage tank-

Cavity 36; 32 Pot discharge line inside the pot 13, directs gas from the bottom 44 of the pot 13 into the discharge line 8; 33 Spring elements that are supported on the bottom 44 of the pot 13 and tend to push the plate 31 upwards away from the bottom 44; 34 Outlet opening near the bottom 39 of the cartridge 20, overlaps with the inlet opening 35 when the filter 11, 20 is inserted

Inlet opening of the pot discharge line 32, when filter 11, 20 is in fluid contact with the outlet opening 34 35.1 | Buffer storage inlet opening of the pot discharge line 32, when filter 11, 20 is removed, is in fluid contact with the buffer storage 19 20201023LU 04.11.2020

36 Buffer storage cavity in a lower area of the pot 13, formed by | Lu102192 of the plate 31 and the wall and the bottom 44 of the pot 13, belongs to the buffer storage, separated from the filter by the plate 31

Cavity 37 separated 37 filter cavity in an upper area of the pot 13, is able to

to record filters 11 and 20, through plate 31 of the

Buffer storage cavity 36 separated 38 vertical partition inside the filter 11, 20, separates the

Ascent area Au from descent area Ab

The base of the cartridge has 20 lower sealing elements that prevent gas from escaping the pot.

Supply line 16 around the cartridge 20 to the pot discharge line 32 flows 41 upper sealing elements, between the upper edge of the pot 13 and the circumferential edge 12 of the cartridge 20

Cartridge lid 20

Cartridge surface area 20

bottom of pot 13

Retaining element for a lower sealing element 40 47 Filter sensor in the pot 13, which determines whether a filter 11, 20 is inserted or not

Slider inside pot 13, connected to plate 31

Anesthetic tank of the anesthetic vaporizer 2

Overpressure valve in the supply line 6 50.1 | Implementation of the overpressure valve 50, comprising the valve plate 51 and the valve crater 52 20201023LU 04.11.2020

-78/ 80 - 50.2 | Implementation of the overpressure valve 50, comprising the valve plate | Lu102192 51, the valve crater 52 and the compression spring 55 50.3 | Implementation of the overpressure valve 50, comprising the valve plate , 51 and the valve ball 56 50.4 | Implementation of the overpressure valve 50, comprising the valve crater . 52 and the valve flap 57 50.5 | Implementation of the overpressure valve 50, comprising the U-shaped ,

Pipe 58 with the liquid 59 50.6 | Implementation form of the overpressure valve 50, includes the pressure-

Sensor 60 and the controllable switching valve 61! 50.7 | Implementation of the overpressure valve 50, comprising the valve crater 52 and the duckbill 62

Valve plate of the overpressure valve 50 rests on the valve crater 52

Valve crater of the overpressure valve 50 53 Partition in the pot 13 between the filter unit 4 and the '

Buffer storage tank 19

Space between filter unit 4 and partition wall 53

Compression spring which tends to push the valve plate 51 upwards

Valve ball rests on valve crater 52

Valve flap, rotatably connected to the valve crater 52 Ë

U-shaped tube containing liquid 59

Liquid in pipe 58 8 Pressure sensor in the supply line to the controllable switching valve 61 Controllable switching valve

Duck's bill, sitting on the valve crater 72 20201023LU 04.11.2020

- 79 / 80 - 64 Hose connecting the overpressure valve 50 to the discharge line 8 | | 102192 65 Check valve in the discharge line 8, prevents gas from escaping the

Fluid intake 7 through the discharge line 8 back to the

Anesthesia machine 1, elastic buffer storage at the supply line 6 71, receiving unit for the two filters 11.1, 20.1 and 11.2, 20.2, is as

Revolver mount designed with 72 motor, which is able to rotate the receiving unit 71 about the axis 73 73 axis of rotation of the receiving unit 71, rotatably connected to the pot 13 8 vacuum valve on the pot 13 ;

Level sensor, measures the current fill level in

Anesthetic tank 49

Volume flow sensor of the anesthesia machine 1, measures the volume flow of gas that the anesthesia machine 1 emits into the supply line 6 / 91 Concentration sensor, measures the concentration of anesthetic agent that is set at the anesthetic vaporizer 2 or that of the

The anesthetic vaporizer 2 actually achieves 92 data storage locations of the filter 11, 20, on which information about the maximum amount of anesthetic is stored, which the

Filter element 11 can accommodate an RFID in one embodiment

Chip or barcode on cartridge 20 93 anesthetic quantity detector, receives measured values from the volume flow-

Sensor 90, from the concentration sensor 91 and the information about the maximum quantity from the data storage 92, determines the quantity of

Anesthetics that filter element 11 has absorbed so far, 20201023LU 04.11.2020

- 80 / 80 - and compares the amount recorded so far with the maximum | Lu102192

Crowd

Diverter which optionally connects the supply line 6 with line 6.1 or line 6.2; 97 Y-piece which connects lines 6.1 and 6.2 with the supply line 6.

Diverter which selectively connects the discharge line 8 with either line 8.1 or line 8.2

Y-piece connecting lines 8.1 and 8.2 to the discharge line 8. 100 | Mounting assembly comprising the filter unit 4, the supply line 6, the discharge line 8, the volume flow sensor 9, and the suction pump Ë

From the descent area in filter 11, 20, where the gas in cartridge 20 sinks downwards to the bottom 39.

Au Ascent area in filter 11, 20, in which the gas in the cartridge 20 rises upwards to the lid 42

Patient connected to anesthesia machine 1 and inhaling at least one anesthetic.

wall which receives the stationary gas uptake 7

Claims (1)

Patent claims LU1021792 1. Receiving arrangement (100) for receiving gas from a medical device (1), in particular from an anesthesia device, wherein the receiving arrangement (100) comprises — a supply line (6, 16), — a discharge line (8, 32), — a filter unit (4) with at least one filter (11, 20, 11.1, 20.1, 11.2, . 20.2) and . — Comprises at least one buffer storage (19, 23, 36, 70), wherein the filter or each filter (11, 20, 11.1, 20.1, 11.2, 20.2) of the filter unit (4) . is designed to filter out at least one predetermined gas component, in particular at least one anesthetic, from a gas which is passed through the filter (11, 20, 11.1, 20.1, 11.2, 20.2), wherein the supply line (6, 16) is designed to establish a fluid connection with the medical device (1) at least temporarily, wherein the discharge line (8, 32) is designed to establish a fluid connection with a fluid receptacle (7) or the environment at least temporarily, wherein a fluid connection (14, 30) is established or can be established between the supply line (6, 16) and the filter unit (4) as well as between the discharge line (8, 32) and the filter unit (4), wherein each buffer reservoir (19, 23, 36, 70) is connected to the supply line via a fluid connection (22.1). (6, 16) and/or in each of a fluid connection (22.2) with the discharge line (8, 32) and wherein the receiving arrangement (100) is designed to, 20201023LU 04.11.2020 — to direct gas from the medical device (1) through the supply line (6, 16) to LV102192 of the filter unit (4), — through the filter unit (4) and thereby at least partially through the filter or a filter (11, 20, 11.1, 20.1, 11.2, 20.2) and — through the discharge line (8, 32) to the fluid intake (7) or into the environment. 2. Recording arrangement (100) according to claim 1, . characterized in that the or a buffer storage device (23) is additionally in a fluid connection (24) with the environment. 3. A receiving arrangement (100) according to one of the preceding claims, characterized in that the filter unit (4) additionally comprises a filter receptacle (13) which is connected in a fluid connection (14, 30) to the supply line (6, 16) and in a fluid connection (26, 35) to the discharge line (8, 32), wherein the filter (11, 20, 11.1, 20.1, 11.2, 20.2) is inserted or can be inserted into the filter receptacle (13), wherein the filter unit (4) is configured such that, after the filter (11, 20, 11.1, 20.1, 11.2, 20.2) has been inserted into the filter receptacle (13), a gap remains between the filter (11, 20, 11.1, 20.1, 11.2, 20.2) and the filter receptacle. (13) a gap (19) is created, wherein this gap (19) is in a fluid connection (22.1) with the supply line (6, 16) and in a fluid connection (22.2) with the discharge line (8, 32) and belongs to the buffer storage tank (19, 23, 36, 70). 20201023LU 04.11.2020 4. Recording arrangement (100) according to one of the preceding claims, LU102192 characterized in that the buffer storage unit (19, 23, 36, 70) comprises a housing (23) which is in a fluid connection (26) with the filter unit (4) and provides an interior space. 5. Intake arrangement (100) according to one of the preceding claims, characterized in that the buffer storage tank (23) — viewed in the flow direction from the feed line (6, 16) to the discharge line (8, 32) — is arranged downstream of the filter unit (4) or the filter unit (4) is arranged downstream of the buffer storage tank (70). 6. Receiving arrangement (100) according to one of the preceding claims; characterized in that the filter unit (4) additionally comprises a filter receptacle (13) which encloses an interior space and is connected in a fluid connection (14, 30) to the supply line (6, 16) and in a fluid connection (26, 35) to the discharge line (8, 32), wherein a movably arranged plate (31) divides the interior space of the filter receptacle (13) into a filter cavity (37) and a buffer storage cavity (36), preferably in a fluid-tight manner, wherein the filter or a filter (11, 20, 11.1, 20.1, 11.2, 20.2) is inserted or can be inserted into the filter receptacle (13), wherein the filter cavity (37) is for receiving the filter (11, 20, 11.1, 20.1, à 11.2, 20.2) is designed and 20201023LU 04.11.2020 “4115 - | ; wherein the buffer storage cavity (36) LU102192 — belongs to or forms this buffer storage (19, 23, 36, 70) and : — At least when no filter (11, 20, 11.1, 20.1, 11.2, 20.2) is inserted into the ' filter receptacle (13), is in a fluid connection with the , supply line (6, 16) and in a fluid connection with the discharge line (8, ; 32). 7. Recording arrangement (100) according to claim 6, characterized in that the plate (31) is movable back and forth relative to the filter recording (13) between a buffer storage position and a park position, . wherein the plate (31) is in the buffer storage position when no filter (11, 20, 11.1, 20.1, 11.2, 20.2) is installed, and in the park position when a filter (11, 20, 11.1, 20.1, 11.2, 20.2) is installed, wherein the feed line (6, 16) has at least one outlet opening (14, 14.1), wherein the discharge line (8, 32) has at least one inlet opening (35, 35.1), wherein when the plate (31) is in the buffer storage position, the outlet opening (14.1) connects the feed line (6, 16) to the buffer storage cavity (30), and the inlet opening (35.1) connects the discharge line (8, 32) connects to the buffer storage cavity (30) and wherein, when the plate (31) is in the park position, 20201023LU 04.11.2020 — the or an outlet opening (14) connects the supply line (6, 16) with the filter cavity (37) and ; — the or an inlet opening (35) connects the discharge line (8, 32) with the filter cavity (37). 8. Receiving arrangement (100) according to claim 6 or claim 7, characterized in that the receiving arrangement (100) comprises a slide (48) which is arranged inside the filter receptacle (13), is movable back and forth relative to the filter receptacle (13) between a buffer storage position and a park position, and is preferably mechanically connected to the plate (31), the feed line (6, 16) has a filter outlet opening (14) and a buffer storage outlet opening (14.1), and the discharge line (8, 32) has a filter inlet opening (35) and a . The buffer storage inlet opening (35.1) has a buffer storage inlet opening (35.1), wherein, when the slide (48) is in the buffer storage position, — the buffer storage outlet opening (14.1) connects the supply line (6, 16) to the buffer storage cavity (30), — the buffer storage inlet opening (35.1) connects the discharge line (8, 32) to the buffer storage cavity (30), and — the slide (48) blocks the filter outlet opening (14) and the filter inlet opening (35), and wherein, when the slide (48) is in the park position, — the filter outlet opening (14) connects the supply line (6, 16) to the filter cavity (37), — the filter inlet opening (35) connects the discharge line (8, 32) to the filter cavity (37), and 20201023LU 04.11.2020 — the slide (48) blocks the buffer storage outlet opening (14.1) and the LV102192 buffer storage inlet opening (35.1). 9. A receiving arrangement (100) according to one of the preceding claims, characterized in that the filter unit (4) additionally comprises a filter receptacle (13) and a filter sensor (47), wherein the filter unit (4) encloses an interior space and is in a fluid connection (14, 30) with the supply line (6, 16) and in a fluid connection (26, 35) with the discharge line (8, 32), wherein the filter (11, 20, 11.1, 20.1, 11.2, 20.2) is inserted or insertable into the filter receptacle (13) and wherein the filter sensor (47) is configured to automatically detect whether a filter (11, 20, 11.1, 20.1, 11.2, 20.2) is inserted into the filter receptacle (13) or not. 10. Receiving arrangement (100) according to one of the preceding claims, characterized in that the volume of the or at least one buffer storage (70) is variable, in particular the or at least one buffer storage (70) is made of an elastic material, wherein a supply of gas into the buffer storage (70) expands the buffer storage (70) and wherein the expanded buffer storage (70) tends to contract and thereby release the absorbed gas. 20201023LU 04.11.2020 11. Receiving arrangement (100) according to one of the preceding claims, characterized in that the receiving arrangement (100) comprises an overpressure valve (50), wherein the overpressure valve (50) opens when the difference between the pressure in the supply line (6, 16) and a pressure around the supply line (6, 16) is above a predetermined overpressure threshold. 12. Receiving arrangement (100) according to claim 11, characterized in that the overpressure valve (50) is connected to the discharge line (8, 32) by a fluid guide unit (64), wherein, when the overpressure valve (50) is open, a fluid connection is established between the overpressure valve (50) and the fluid guide unit (64). 13. Recording arrangement (100) according to claim 11 or claim 12, characterized in that the recording arrangement (100) comprises a concentration sensor (15) which is configured to measure the concentration of at least one gas component at a measuring position downstream of the filter (11, 20, 11.1, 20.1, 11.2, 20.2) to determine, wherein the recording arrangement (100) is configured to generate a message when — the overpressure valve (50) is open or — the concentration sensor (15) has detected a concentration above a predefined concentration threshold. 20201023LU 04.11.2020 14. Receiving arrangement (100) according to one of the preceding claims, characterized in that the receiving arrangement (100) comprises a vacuum valve (80), wherein the vacuum valve (80) opens when the difference between the pressure in the supply line (6, 16) or inside the filter unit (4) and an ambient pressure is below a predetermined vacuum threshold. 15. Receiving arrangement (100) according to claim 14, characterized in that at least one opening (21) is provided in a wall (13) of the filter unit (4), wherein, when the vacuum valve (80) is open, the interior of the filter receptacle (13) is in fluid communication with the environment through the or at least one opening (21) in the wall (13) of the filter unit (4), and wherein the closed vacuum valve (80) closes the fluid communication between the interior of the filter unit (4) and the environment. —16. Mounting arrangement (100) according to one of the preceding claims, characterized in that the filter unit (4) additionally comprises a filter receptacle (13) which is connected in a fluid connection (14, 30) to the supply line (6, 16) and in a fluid connection (26, 35) to the discharge line (8, 32), wherein the filter (11, 20, 11.1, 20.1, 11.2, 20.2) can be inserted into and removed from the filter receptacle (13). 20201023LU 04.11.2020 17. Receiving arrangement (100) according to one of the preceding claims, characterized in that the filter unit (4) comprises a first filter (11.1) and a second filter (11.2), wherein the receiving arrangement (100) comprises a switching device (72) which is configured to selectively place either the first filter (11.1) or the second filter (11.2) into a fluid connection with the supply line (6, 16) and with the discharge line (8, 32). 18. Recording arrangement (100) according to claim 17, characterized in that the first filter (11.1) is configured to filter out a first predetermined gas component and the second filter (11.2) is configured to filter out a second predetermined gas component that differs from the first gas component. —19. Intake arrangement (100) according to one of the preceding claims, characterized in that the filter unit (4) is configured such that — gas is guided through the filter (11, 20, 11.1, 20.1, 11.2, 20.2) on its way from the supply line (6, 16) to the discharge line (8, 32) and — it is prevented that the gas bypasses the filter (11, 20, 11.1, 20.1, 11.2, 20.2). 20201023LU 04.11.2020 20. Receiving arrangement (100) according to one of the preceding claims, LU102192 characterized in that a wall (38) divides the filter (11, 20, 11.1, 20.1, 11.2, 20.2) into a first region (Ab) and a second region (Au), wherein the first region (Au) is in fluid communication with the supply line (6, 16) and the second region (Ab) is in fluid communication with the discharge line (8, 32) and wherein the filter unit (4) is configured such that gas flows from the supply line (8, 18) through the first region (Au) and then through the second region (Ab) into the discharge line (8, 32). 21. Recording arrangement (100) according to one of the preceding claims, characterized in that the filter unit (4) comprises a data storage device (92) and the recording arrangement (100) comprises a reading device for reading the data storage device (92), wherein at least one of the following information is stored in the data storage device (92): — a unique identifier of the filter unit (4), — information on whether the filter unit (4) is new or has already been used, — information on which gas components the filter unit (4) is usable and/or not usable, — information on the time at which the use of the filter unit (4) for filtering was started. 22. Recording arrangement (100) according to one of the preceding claims, characterized in that the recording arrangement (100) comprises a component quantity detector (93) LU102192, which is configured to receive: — a signal for the time-varying volume flow of fluid through the supply line (6) to the filter unit (4) and — a signal for the time-varying concentration of the gas component or at least one gas component in the supply line (6) or — a signal indicating the quantity of the gas component fed into the supply line (6), depending on these two signals, to approximate the quantity of the gas component that the filter unit (4) has recorded so far, to compare the quantity recorded so far with a predetermined maximum quantity that the filter unit (4) is capable of recording, and to generate a message depending on the result of the comparison. 23. Recording arrangement (100) according to claim 22, characterized in that the filter unit (4) comprises a data storage device (92) in which information about the maximum quantity of the or at least one gas component which the filter (11, 20, 11.1, 20.1, 11.2, 20.2) is able to capture is stored, wherein the component quantity determiner (93) is configured to use the information stored in the data storage device (92) as a predetermined maximum quantity when comparing. 24. Receiving arrangement (100) according to one of the preceding claims, 20201023LU 04.11.2020 characterized in that LU102192 the receiving arrangement (100) comprises a vacuum generator, in particular a suction pump (10), wherein the discharge line (8) is in a fluid connection with the vacuum generator (10) and wherein the vacuum generator (10) is configured to generate a vacuum in the discharge line (8). 25. Use of a receiving arrangement (100) according to one of the preceding claims for receiving gas from a medical device (1), in particular from an anesthesia device. 26. Medical arrangement comprising — a medical device (1), in particular an anesthesia device, and — at least one receiving arrangement (100) according to any one of claims 1 to 23, wherein the respective supply line (6, 16) of the or each receiving arrangement (100) is at least temporarily in fluid communication with the medical device (1). 27. Medical arrangement according to claim 26, characterized in that the medical arrangement comprises a further medical device (1.1), wherein a fluid connection (6.1, 6.2) can optionally or simultaneously be established between the medical device (1) and the supply line (6) or between the further medical device (1.1) and the supply line (6) of the same receiving arrangement (100). 20201023LU 04.11.2020 28. Medical arrangement according to claim 26 or claim 27, characterized in that the receiving arrangement (100) is arranged inside the medical device (1). 29. Medical system comprising — a medical arrangement according to one of claims 26 to 28 and — a fluid intake (7), preferably a stationary fluid intake (7), wherein the discharge line (8, 32) of the intake arrangement (100) is at least temporarily in fluid communication with the fluid intake (7). 30. Medical system according to claim 29, characterized in that the medical system comprises a further fluid intake (7.1), preferably a further stationary fluid intake (7.1), wherein a fluid connection (7.1, 7.2) can be established optionally or simultaneously between the fluid intake (7) and the discharge line (8, 32) or between the further fluid intake (7.1) and the discharge line (8, 32). 31. Method for receiving gas from a medical device (1), in particular from an anesthesia device, wherein the method is carried out using a receiving arrangement (100), wherein the receiving arrangement (100) comprises a supply line (6, 16) and a discharge line (8, 32). 20201023LU 04.11.2020 — a filter unit (4) with at least one filter (11, 20, 11.1, 20.1, 11.2, LU102192 20.2) and — comprising at least one buffer storage (19, 23, 36, 70) and wherein the method comprises the steps of: — establishing a fluid connection between the medical device (1) and the supply line (6, 16); — establishing a fluid connection between the discharge line (8, 32) and a fluid intake (7) or the environment; — causing gas to escape from the medical device (1), in particular by being expelled and/or drawn off; — the intake arrangement (100) collecting the escaped gas through the supply line (6, 16), filter unit (4) and discharge line (8, 32) through to the fluid intake (7) or into the environment, wherein: — all or at least part of the gas, when passing through the filter unit (4), is passed through the filter or a filter (11, 20, 11.1, 20.1, 11.2, 20.2), and — this filter (11, 20, 11.1, 20.1, 11.2, 20.2) filters out at least one predetermined component, in particular an anesthetic, from the gas passed through the filter (11, 20, 11.1, 20.1, 11.2, 20.2), wherein, if more gas escapes from the medical device (1) than is directed into the fluid intake (7) or the environment, gas from the supply line (6, 16) and/or from the discharge line (8, 32) into the or at least one buffer storage tank (19, 23, 36, 70) and wherein, when less gas escapes, gas is directed from the or at least one buffer storage tank (19, 23, 36, 70) into the discharge line (8, 32) and/or into the supply line (6, 16). 32. Method according to claim 31, characterized in that the filter unit (4) additionally comprises a filter receptacle (13) which encloses an interior space and is at least temporarily in a fluid connection (14, 30) with the supply line (6, 16) and at least temporarily in a fluid connection (26, 35) with the discharge line (8, 32), wherein a movably arranged plate (31) divides the interior space of the filter receptacle (13) into a filter cavity (37) and a buffer storage cavity (36), preferably in a fluid-tight manner, wherein the filter (11, 20, 11.1, 20.1, 11.2, 20.2) is placed in the filter cavity. (37) is used or is in place, wherein at least once the filter (11, 20, 11.1, 20.1, 11.2, 20.2) is removed from the filter holder (13) and wherein at least when the filter (11, 20, 11.1, 20.1, 11.2, 20.2) is removed the buffer storage cavity (36) is in a fluid connection with the supply line (6, 16) and in a fluid connection with the discharge line (8, 32).