WO2013093841A1 - Élément permettant d'améliorer un système d'évacuation des gaz anesthésiques et procédé associé - Google Patents

Élément permettant d'améliorer un système d'évacuation des gaz anesthésiques et procédé associé Download PDF

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Publication number
WO2013093841A1
WO2013093841A1 PCT/IB2012/057540 IB2012057540W WO2013093841A1 WO 2013093841 A1 WO2013093841 A1 WO 2013093841A1 IB 2012057540 W IB2012057540 W IB 2012057540W WO 2013093841 A1 WO2013093841 A1 WO 2013093841A1
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WO
WIPO (PCT)
Prior art keywords
component
plug
anesthetic gas
gas
counterpart
Prior art date
Application number
PCT/IB2012/057540
Other languages
German (de)
English (en)
Inventor
Karlo Klein
Original Assignee
Universitätsklinikum Freiburg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Universitätsklinikum Freiburg filed Critical Universitätsklinikum Freiburg
Publication of WO2013093841A1 publication Critical patent/WO2013093841A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
    • A61M16/009—Removing used or expired gases or anaesthetic vapours
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M16/0009—Accessories therefor, e.g. sensors, vibrators, negative pressure with sub-atmospheric pressure, e.g. during expiration
    • A61M16/0012—Accessories therefor, e.g. sensors, vibrators, negative pressure with sub-atmospheric pressure, e.g. during expiration by Venturi means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated

Definitions

  • the invention relates to the field of anesthetic gas delivery systems.
  • the invention relates to a component for such a system, which allows a particularly economical operation, and a method thereof.
  • anesthetic gases are often used. These gases are mixed into the breathing air and the patient by means of a patient-side transmission device for respiratory gas such. a breathing mask that covers the mouth and nose of the patient, or a tube, which is inserted into the trachea, fed.
  • a breathing mask that covers the mouth and nose of the patient, or a tube, which is inserted into the trachea, fed.
  • the spent, expired breathing gas which is still enriched with anesthetic gas, is discharged via the same transmission device again.
  • Particular care should be taken to ensure that at no time such gas enters the patient's environment, as this could lead to impairment of the staff.
  • Another aspect is the avoidance of the risk of explosion due to hazardous gas mixtures.
  • Special anesthesia machines are used to administer the desired dose of anesthetic gas in proper mixing with breathing air.
  • the dose is selected by means of suitable adjusting devices.
  • AGFS Anesthetic Gas Scavenging System
  • these AGFS direct the respiratory gas by means of appropriate hose lines in an exhaust system.
  • This exhaust system is typically laid largely in the walls of a building (eg hospital) and ends at an unproblematic place outdoors.
  • filtering and, if appropriate, recovery of, in particular, the anesthetic gas can also be carried out beforehand.
  • a vacuum exhaust system device is known for example from the document US 7,628,034 B2.
  • a negative pressure must prevail in the exhaust gas line at any point in time when the respiratory gas containing anesthetic gas is present.
  • Two types of systems are used for this.
  • a first type uses directly already existing in the exhaust system vacuum. This vacuum must be generated at a suitable, mostly remote location, which requires a considerable amount of energy.
  • Another type uses the very common overpressure system of a building.
  • the overpressure line (with, for example, 5 bar) is connected to a so-called ejector. This generates a suction, ie a negative pressure, which is provided at its suction side when flowing through the operating gas of the overpressure line (with, for example, 10 to 30 l / min).
  • the negative pressure is applied to the supply line of the AGFS.
  • the breathing gas is sucked by the negative pressure in the ejector, where it mixes with the operating gas, which flows through the ejector, and is finally disposed of with the now loaded operating gas at an unproblematic point.
  • an AGFS also includes the coupling of the patient-side part to the positive or negative pressure system (short: exhaust system) of the building.
  • ZAS central extraction system
  • the connection dimensions and geometries of such a connector are, for example, in DIN EN 737 (EU) or NFPA 99 (USA) standardized. Simplified shown the mode of operation provides that when plugging the plug into a corresponding, connected to the exhaust system wall connection a shut-off valve is opened, so that the exhaust system via the plug the patient-side part of the AGFS permanently provides a negative pressure. Only when removing the plug from the port, the latter is automatically locked again, so that no unnecessary gas consumption.
  • plugs also offer the possibility to close the shut-off valve manually even without removing them from the wall connection.
  • a plug is offered for example by the company Dräger, Lübeck. In this way, when no patient is connected to the AGFS, unnecessary gas consumption can be avoided without removing the plug from the wall outlet. However, the plug is then inserted only in the wall connection, but not locked. This can lead to unintentional withdrawal of the same. Conversely, it is not immediately apparent from the outside whether the plug is locked and therefore ready, or unlocked and therefore not ready for operation.
  • a further disadvantage relates to the provision of control data for a medical-technical component assigned to an anesthetic gas delivery system, such as, for example, the detection device with controllable valve known from the aforementioned document, which hitherto takes place by means of corresponding additional sensors.
  • the object of the invention is thus to provide a component for an AGFS which does not have the disadvantages described above.
  • a component should allow a particularly economical operation of the system and be both space and cost.
  • the invention is intended at all times to ensure safety against unintentional disconnection of the components of the AGFS.
  • the invention is intended to include the least possible number of parts and to avoid functional redundancies.
  • the invention is also intended to disclose a method of operating such an improved system.
  • the invention relates to a component for an anesthetic gas delivery system, hereinafter referred to as AGFS or "system.”
  • AGFS an anesthetic gas delivery system
  • Such a system is suitable for the demand-driven removal of undesirable gases, such as, in particular, respiratory gases which are produced, for example, in the context of treating a patient with anesthetic gas. Needs appropriate "here means that the disposal of (spent) respiratory gas or excess fresh gas is adapted to the possibility of exposure to anesthetic gas.
  • humans may be considered “patients", but the invention is equally suitable for the treatment of animals.
  • connection areas refers to the patient-side input and / or the wall connection-side output.
  • the component can be arranged fluidically between the patient and an exhaust system and can be connected to a counterpart for supplying a negative pressure in the component (and thus in the patient-side part of the AGFS), which is disclosed for at least one gaseous fluid and which is also provided for the passage of the undesired gases.
  • Fluid means that a fluid flow, in particular a gas flow, can be conducted without contact with the environment from the patient or the end of the system facing him or her to an “exhaust system” (see above description).
  • the term “fluidic” refers Accordingly, the property of the component to conduct a fluid. It should also be noted that the "openability” does not necessarily refer to the undesirable gases, but generally to a “fluid” (eg, a working fluid).
  • the component is characterized in that it has a, but preferably not actuated by the undesirable gases controlled trigger for opening the counterpart of the fluid.
  • opening refers to the above-mentioned property of "openability" of the counterpart.
  • component and counterpart cooperate in such a way that due to the action of the component on the counterpart a fluid (gas) can flow in the counterpart.
  • the component which is preferably continuous at all times for the unwanted gases has the same effect fürleitiana of these gases acting on the connected counterpart, controlled actuated trigger for opening the counterpart for the fluid, wherein the trigger is actuated only by a drive, but not by the undesirable gases.
  • the component for opening the unwanted gas only has a controlled actuatable trigger acting on the counterpart (and no other component otherwise).
  • the counterpart is not included in the invention, since such counterparts are already available on the market.
  • Controlled is to be understood as opposed to “manual”, that is to say that the trigger of the component can be actuated (moved, triggered) without human intervention. It should be noted that the compound of component and counterpart is normally open (“normally open”) to insure that breathing gas and the like can be carried away in the event of controlled actuation failure
  • Functionality "safe” is that thus an unintentional interruption of the fluid line, be it by unintentional disconnection of components of the system or by accidental closing of said component excluded.
  • the component is such that the trigger can only be actuated by a drive provided for this purpose, but not otherwise, in particular not by the unwanted gases themselves. This serves the reliability of the invention, since otherwise it could lead to uncontrolled operating conditions. Neither an excess nor a negative pressure on one of the two sides of the component thus leads to an actuation of the trigger. It should be made at this point to constructive examples, which are explained in detail in the context of the figures. It is clear that the controllable operability, in particular in connection with the presence of hazardous substances such as anesthetic gas in the system forms an advantageous unit, which will be discussed later.
  • An AGFS equipped with such a component has the advantage that it achieves the advantage known from the prior art of being able to control the flow of unwanted gases with a significantly smaller number of parts. A separate housing for the component is not necessary, as will be shown below. There are also advantages in terms of energy consumption, safety and flexibility, which will also be discussed below.
  • connection geometry (s) of the component are designed for direct mechanical fluidic connectivity to an AGFS, specifically to the patient side tubing and / or to the typically existing wall connection other, not explicitly mentioned norms (also factory standards) can be "relevant”.
  • the component is always consistent with the unwanted gases. That means you
  • the component which is preferably a plug, additionally has an internal valve mechanically coupled to the trigger. In this way, double security is provided against undesired passage of gases through the component and counterpart system. It is clear that even in this case, no actuation of the trigger by the unwanted gases itself may be possible.
  • valve upon occurrence of a unkontrollier ⁇ th patient-side overpressure (and / or wall terminal-side negative pressure) increases and is not pressed is (or pulled), and / or that the largest prevailing in the system pressure differential creates a force on the shutter which is smaller than that of a spring counteracting this force or the like, so that the system remains closed and can only be opened by the controlled actuatable trigger.
  • the trigger of the component according to the invention is intended to flow when opening the counterpart of one of the following fluids in the counterpart.
  • the fluid is unwanted gas and the component is arranged to (directly) open a counterpart passage to a negative pressure applied in the exhaust system.
  • the passage is particularly preferably a "normally closed” passage, that is to say the counterpart comprises a trigger-actuated valve which is closed in the unactuated state
  • a counterpart is for example provided by the commercially available wall used in the USA
  • These include a valve closure, which is opened by pushing in, as is the case when inserting a conventional ZAS connector, so that the negative pressure is passed on directly to the fluid line running between the connector and the patient.
  • the fluid is a working fluid, such as, in particular, compressed gas for operating an ejector having an intake side and an output side, and the component is adapted to open a compressed gas valve of the ejector, the intake side of which is fluidic with the component, and whose output side is fluidly connectable or connected to the (preferably non-pressurized) exhaust system.
  • a working fluid such as, in particular, compressed gas for operating an ejector having an intake side and an output side
  • the component is adapted to open a compressed gas valve of the ejector, the intake side of which is fluidic with the component, and whose output side is fluidly connectable or connected to the (preferably non-pressurized) exhaust system.
  • An advantage of this embodiment is that the vacuum is generated (and thus consumes energy) only when it is needed. Although the operational readiness to provide overpressure at any time; however, this deployment costs significantly less energy than providing a (secondarily unused) vacuum.
  • the noise of a system with the invention shown SEN component is generally lower because there is no gas flow and thus no associated noise ⁇ development occurs in the rest.
  • Pollution from aspirated dust etc. is reduced in accordance with the shortened activity times.
  • component and counterpart can always remain mechanically connected, so that dirt can not penetrate.
  • the component has a drive, which preferably operates electrically, pneumatically and / or hydraulically.
  • the drive is particularly preferably integrated into the component, which is possible in principle for any existing energy supply.
  • the energy for example in the form of compressed air, vacuum, pressurized hydraulic fluid or electricity, be provided from an external source suitably connected to the drive.
  • combinations of the mentioned drive forms for example an electro-hydraulic drive, depending on the situation (required power requirement, space, switching frequency, ruggedness, ...) may be advantageous.
  • the component is a (preferably permanent, so not restrictable) passage of the unwanted gases set plug for non-positive and / or positive interaction with the leading to the exhaust system, designed as a wall connection
  • the plug is particularly preferably designed so that it can cooperate with AGFS components of the prior art. It can be plugged or screwed accordingly and depending on the specific norm for which it is designed. Said counterpart is preferably a wall connection, as it is commercially available for the purpose of connecting the AGFS to an in-house exhaust system. It is clear that the plug can be traversed by gas, for which he has a corresponding hole and connections for the wall connection and the hose connection.
  • the plug as a trigger in its interior axially arranged and axially displaceable plunger.
  • the plunger In a second end position, the plunger is at least partially retracted into the plug.
  • the plunger is adapted to cooperate with an opening valve arranged in the wall connection, and movable by means of the drive between the two end positions. This means that, by actuating a valve element present in the wall connection by means of the plunger, this valve element is opened so that a negative pressure prevailing there is passed on to the interior of the plug and from there to the further exhaust system.
  • the valve element can interact with an ejector which is operated with positive pressure and provides negative pressure.
  • a constructive variant of the plunger is designed as a sleeve and has wall connection side radial openings for the fluidic connection of the plug with the intended for the unwanted gases passage of the wall connection.
  • the valve element of the wall connection is actuated, provided that it protrudes (in the non-driven state) from the tip of the plug.
  • the advantage of this variant lies in the larger, provided for the passage of the unwanted gases through the connector cross-section.
  • the component is an adapter, which is arranged fluidically between a connector arranged on the patient side and the abgassystem fact arranged, designed as a wall connector counterpart, and suitable for non-positive and / or positive engagement with the plug and the wall connection is.
  • an inventive adapter cooperates with a standard plug and wall connection, so it is particularly suitable for retrofitting already existing AGFS.
  • AGFS can be equipped in the simplest way with the functionality provided by the invention. Accordingly, an already existing conventional plug remains in the patient-side end of the adapter, and the adapter itself remains in the existing conventional wall socket.
  • the component may have an operation indicator.
  • a display is used for simple and reliable detection of the operating state by a user.
  • the display can work with color coding (green / red, black / white) and / or symbols (I / 0).
  • the display interacts with the plunger in such a way that it detects its position (first / second end position, fluid flow opened / closed) and converts it into a visually perceptible signal.
  • acoustic displays are also conceivable, and the display can be done remotely, for example on a screen, so that only the status signal is detected at the component and forwarded from there.
  • the invention offers advantages in particular if it has suitable control for the controlled actuable trigger of the component. Therefore, it is preferable for the component to be assigned or included by a control with which the trigger can be controlled.
  • control is configured "rigidly", for example, it can be switched by means of a timer, or via an energy supply (plug-in connector) which is connected to an anesthetic gas device.
  • the controller is associated with or comprises a device for detecting the possibility and / or the actual occurrence of undesired gases.
  • Such control may also be referred to as "intelligent.” It should be noted that with such control, in the first place, generally only the possibility of anesthetic gas (or other undesirable matter) occurring in the fluid system is detectable Detection, ie a detection of the gas, takes place.A "sensor”, as it is partially used in the prior art, is not absolutely necessary in this case.
  • the device for detection comprises an anesthetic gas sensor which can be arranged fluidically between the patient end and the exhaust system, or electronics which evaluate the data of an anesthetic gas monitor and / or anesthesia device.
  • a sensor can detect the actual occurrence of undesirable substances in the fluid system and effect a demand-driven operation of the AGFS via the controller. It is clear that the sensor is arranged in a suitable location, ie preferably where anesthetic gas can occur as early as possible, in the fluid flow.
  • an electronic device that evaluates the data of an anesthetic gas monitor and / or anesthesia device does not measure any gas values uses existing information in anesthesia gas monitor or anesthesia machine. These may be, for example, switching signals for an anesthetic gas valve, pump signals for conveying this gas into the circular part of an anesthetic machine, or the like. It is also conceivable to network the controller with future existing IT systems of a hospital, in which the corresponding data on the supply of anesthetic gas concerning a specific treatment station are stored and / or logged.
  • the control described may optionally be integrated in an anesthetic gas monitor or an anesthetic machine, or it may be present as an external system.
  • the first variant has the advantage of lower overall costs, the latter the advantage of easy retrofitting already existing AGFS.
  • the controlled actuable trigger of the component is wired or wirelessly connectable to the controller or connected.
  • the wired variant can be implemented cost-effectively
  • the wireless connection oriented with regard to future interfaces of the hospital operation offers the advantage that the control according to the invention can be realized even by replacing a conventional plug / adapter / wall connection without laying cables.
  • this is desirable because they are not permanently connected via the hose located on a plug to the patient-side end of the system, to which the control is preferably also located.
  • the invention also relates to an anesthetic gas transfer system for the demand-driven removal of undesired gases, comprising a component, a counterpart, a device for detecting the possibility and / or the actual occurrence of undesirable gases, and a controller, in each case according to the above definitions.
  • an AGFS comprises a component with controlled actuable trigger according to the above Description, which is preferably a plug. Therefore, reference is made to the corresponding embodiments and the description of the figures regarding the features of such a component. In the following it will be explained how an anesthetic gas delivery system according to the above description can be operated advantageously.
  • the following steps are to be performed: - fluidly connecting a patient-side transmission device for respiratory gas with an exhaust system with fluidic interposition of the component;
  • Trigger for opening the counterpart of the fluid for the purpose of transporting the unwanted gases from the patient-side transmission device to the exhaust system as required.
  • the actual detection of unwanted gases or the detection of the possibility of their occurrence controls the trigger of the component, resulting in opening of the counterpart for the fluid.
  • the fluid is the unwanted gas itself, it is removed due to the negative pressure. If the fluid is a pressurized gas for an ejector, then it starts up and in turn generates the negative pressure required for the removal of the unwanted gases.
  • the sensor or the electronics can be present separately from or integrated in an anesthesia gas monitor or an anesthetic machine.
  • the control of the possibility of the occurrence of anesthetic gas can take place by contacting and checking the fluid flow by means of a suitable sensor, or by evaluating information such as the data of an anesthetic gas monitor and / or anesthesia machine by means of an electronic control system be used.
  • data are made available in more modern devices via special interfaces, such as the so-called “MEDIBUS” from Dräger, or the “HUL-BUS” from Heinen + Löwenstein. Due to the continuous control, the controller can operate as needed, ie only by means of the component allow the removal of unwanted gases, if actually anesthetic gas is present in the fluid system, or in any case (due to the evaluation of indirect data) should be present.
  • the invention relates to a method for controlling a medical-technical component, in particular an anesthetic gas delivery system.
  • a medical-technical component in particular an anesthetic gas delivery system.
  • control data derived directly or indirectly from sensors. This is associated with a corresponding effort, since such a sensor must be provided, mounted, supplied with energy and possibly serviced, which is disadvantageous.
  • the control data by means of a data of an anesthetic gas monitor and / or anesthesia machine provided evaluating electronics. This means that the above-mentioned sensor can be omitted.
  • the medical-technical component is preferably a component K according to the above definition, ie a component for an anesthetic gas transfer system for the demand-driven removal of undesired gases, wherein the component has a controlled actuable trigger for opening the counterpart.
  • the control data is then used for controlled actuation of the trigger.
  • the component may, for example, also be an alarm system, e.g. indicates a malfunction, which is the data stream directly or indirectly (by interpretation of the same) removable.
  • the data of the anesthetic gas monitor or anesthesia device by means of a standardized interface such as the MEDIBUS Fa. Dräger, are provided.
  • a standardized interface such as the MEDIBUS Fa. Dräger
  • Such interfaces which are used in particular for patient data management systems, have hitherto not been used for switching medical-technical components, but are typically used to connect display devices, which is why there are no data which can be used directly as control data at the interfaces.
  • the described method makes it possible that no intervention in the hardware of this device and / or the provision of an additional sensor is necessary, but that the data acquisition can be achieved in a particularly simple and cost-effective manner.
  • the data is then converted by means of evaluating electronics into control data for the medical component.
  • the invention provides a component for an AGFS which does not have the disadvantages known from the prior art.
  • the component according to the invention allows a particularly economical operation of an AGFS and is both space-efficient and cost-effective.
  • An unintentional disconnect, for example, the plug from the wall connection, in which the Plug for temporary interruption of the fluid flow only loosely inserted, but not locked, can not occur in the invention.
  • the component according to the invention has a smaller number of parts compared with the prior art and avoids functional redundancies.
  • An AGFS equipped with the component according to the invention and / or using the method according to the invention can be operated more safely and more cost-effectively.
  • FIG. 1 shows a component according to the invention in the form of a
  • Figure 2 shows a front view of such a plug.
  • Figure 3 shows an alternative embodiment to such
  • FIG. 4 shows a further alternative embodiment of such a plug.
  • Figure 5 shows another alternative to such a plug.
  • Figure 6 shows a front view of such a plug.
  • FIG. 7 shows a standard ZAS plug in a wall connection with ejector.
  • FIG. 8 shows a ZAS plug according to the invention in one
  • FIG. 9 shows the ZAS plug according to FIG. 8 in the closed position
  • FIG. 10 shows a flow diagram relating to the application of the system according to the invention.
  • FIG. 11 shows a flow chart concerning a modification of FIG
  • Fig. 12 is a flowchart relating to another one
  • FIG. 13 shows a flow chart relating to another one
  • FIG. 1 shows a component according to the invention in the form of a ZAS plug.
  • One part of the plug (left of the dashed vertical dividing line T) is shown cut, in the other, the inner geometries are drawn as hidden edges (dashed). Hatching was omitted for the sake of representability.
  • This plug has a wall connection-side tip 1 and a patient-side hose connection 2 (wall connection and patient not shown).
  • a cylindrical cavity 3 is present.
  • a plunger 4 is slidably mounted in the axial direction 5.
  • the plunger 4 is actuated by means of a schematically illustrated drive 6, which is arranged in the rear region of the cavity 3.
  • a spring 7 acts such that the plunger 4 in the illustrated, non-driven state from the top of the first sticking out of the plug.
  • This construction in conjunction with a suitable wall connection such as in particular a commercial AGFS wall junction box (not shown) results in a so-called “normally-open” construction.
  • a suitable wall connection such as in particular a commercial AGFS wall junction box (not shown) results in a so-called "normally-open” construction.
  • the plug when plugged into the wall connection, triggers a valve typically present in that wall connection so that fluid can flow through the plug. In case of malfunction of the drive 6 is thus ensured that the plug at least retains the basic functionality that also provides a conventional ZAS connector.
  • a patient-side overpressure nor a wall-connected negative pressure can lead to an undesired actuation of the trigger.
  • a sufficiently large gap between the plunger 4 and the inner wall of the front part of the plug is present, so that the gas can always flow through the plug 1, regardless of the position of the plunger 4.
  • the unwanted gas can thus neither the Pull the plunger 4 out of the plug 1, still press into it, and thus do not actuate the valve of the wall connection (not shown).
  • the stiffness of the spring 7 is so high and the drive 6 is so strong that only the drive 6, but not the unwanted gas can lead to actuation of the trigger.
  • the "switched" by the trigger (plunger 4) in the counterpart fluid can either be directly undesirable gas, or it can be a pressurized working gas, which operates a built-in wall connector ejector, in turn, negative pressure to evacuate the undesirable gases containing fluid strand
  • the cavity 3 has a suitable guide 8 for the plunger 4. Between the front end of the plunger 4 and the inner wall surrounding it of the cavity 3, there is sufficient space to allow fluid, in particular gas, to flow unhindered through the plug.
  • the plug of the embodiment shown has a latch 9 for securely attaching the plug to a wall terminal mounted in the form of a shell on the outside of the plug.
  • FIG. 2 shows the front view of the plug from FIG
  • FIG. 3 shows an embodiment of a plug according to the invention, according to which the drive 6 does not work against a spring, but operates on an electric, electromagnetic, hydraulic or pneumatic basis.
  • the spring can be replaced by an equivalent means, e.g. a permanent magnet or an air cushion are replaced (not shown).
  • the other components are as in the embodiment described above and not provided again with reference numerals.
  • FIG. 5 shows an embodiment similar to the previous variant. Again, the sleeve 10 slides in a correspondingly large axial bore 12 of the plug. Locking is dispensed with according to this embodiment, so that the plug is in its outer geometry compliant with the new DIN 737 or its successor, DIN EN ISO 9170-2, according to which the lock is associated with the wall connection (not shown).
  • FIG. 10 A front view is shown in FIG. It can be clearly seen that the sleeve 10, which is connected to the plunger 4 (hidden drawn), is received in the axial bore 12 of the plug. The drive and other elements of the plug are not shown for reasons of clarity.
  • An advantage of this embodiment is that no separate guides for the plunger 4 are required, and that the present for the flow of fluid cross-section may be larger. This results in lower flow losses that occur in lower noise and lower energy consumption.
  • FIG. 7 serves to illustrate the state of the art with regard to ZAS plugs and associated wall connections.
  • the plug shown on the right in the picture is plugged into the opening of the wall connection and secured to it with a lock 9. It is designed for the passage of a fluid, which is symbolized by thick, pointed arrows. This enters the plug at the patient-side hose connection 2 and leaves it through radial openings 11 at its tip 1 which is connected to the wall connection.
  • an ejector 13 In the wall connection an ejector 13 is shown. This has a compressed gas valve 14. Its suction side 13A is fluidly connected to the plug, and its discharge side 13B is connected to the exhaust system A.
  • the plug is designed to open the compressed gas valve 14; this means that upon insertion of the plug into the wall connection, the tip 1 opens the compressed gas valve 14 via a pressure plate (without reference numeral), so that the ejector begins to work.
  • the pressure plate is arranged to close the wall port from the inside when the plug is removed from the wall port (not shown), thus forming a check valve. This prevents leakage from already in the exhaust system A gas when no plug is present.
  • FIG. 8 shows a component K according to the invention designed as a plug.
  • this has a drive 6 which acts on a trigger designed as a plunger 4.
  • the drive is in a first end position.
  • the plunger 4 is connected to a sleeve 10. The fluid can flow through the interior of the sleeve (not shown) and leave it at the top 1 of the plug plugged into the wall outlet.
  • the apparatus shown will only provide a vacuum (and thus consume energy) if a means (not shown) for detecting the possibility and / or the actual occurrence of undesired gases via a controller (not shown ) gives a corresponding signal to the drive 6.
  • a controller not shown
  • the plug shown can remain plugged into the wall connection at any time, without consuming energy (in the form of compressed air or negative pressure).
  • Actuation of the trigger by the unwanted gases is not possible.
  • such gas should it be under pressure (which is virtually impossible in the context of the application according to the invention anyway), through the inside of the sleeve and the adjoining radial opening (each without reference numeral) flow out at the top of the plug without being able to build up any significant pressure on the pressure plate ,
  • the occurrence of a wall connection-side negative pressure is presently not possible, since the ejector 13 is not in operation and so no negative pressure is generated.
  • a position sensor can be mounted on the drive to check that the drive is actually in the desired position.
  • a malfunction of the drive no energy, jamming, wrong interpretation of the signal, drive damage
  • FIG. 10 shows a flow chart relating to the application of the system according to the invention. Quasi-continuous fluid flows are symbolized by normally-drawn arrows, fluid flows only when needed by dotted solid arrows, and data streams by dashed-contour arrows.
  • a patient P is connected to an anesthesia machine N. This will take up fresh gas and enrich this with anesthetic gas.
  • An anesthetic gas monitor M monitors this function. It comes to monitor data, data logs or the like. These dates are processed by means of an electronic E for evaluating the monitor data.
  • the electronics E cooperates with a controller S.
  • the latter finally controls the component K according to the invention, for example a ZAS plug, which is connected fluidically, for example by means of a wall connection, to a central or local anesthetic gas extraction system (exhaust system A).
  • FIG. 11 shows a modification according to which the monitor M is integrated in the anesthesia machine N. The remaining features are identical to the previous embodiment and will therefore not be described again. This variant represents the frequently encountered case in practice. Since anesthesia device N and monitor M are integrated, the corresponding material flows between them are eliminated.
  • FIG. 12 which shows a further embodiment of the operation of a system with a component according to the invention
  • X for checking the possibility of the occurrence of anesthetic gas in the system. This can e.g. evaluating the turn-on operation of an anesthetic gas injection system or an evaporator / vaporizer.
  • a sensor which in the present case is arranged in the housing of the anesthetic machine N or of the monitor M, and which measures the actual occurrence of anesthetic gas in the fluid flow, can be considered for this purpose.
  • a sensor but be arranged elsewhere in the fluid system, wherein the patient P closer points are preferred.
  • FIG. 13 shows an even more highly integrated embodiment, according to which anesthesia device N, monitor M, electronics E and control S are combined.
  • anesthesia device N monitor M, electronics E and control S are combined.
  • Such a variant is particularly suitable for new developments of anesthesia units, in which space and material saved by the integration and thus costs can be reduced.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Anesthesiology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne le domaine des systèmes d'évacuation des gaz anesthésiques. L'invention concerne en particulier un élément destiné à un tel système et permettant un fonctionnement particulièrement économique, ainsi qu'un procédé associé. L'invention concerne un élément (K) d'un système d'évacuation des gaz anesthésiques assurant une évacuation appropriée des gaz indésirables, la configuration des zones de raccordement fluidique-mécanique de l'élément (K) étant réalisée en conformité avec une norme applicable au raccordement fluidique-mécanique à un système d'évacuation des gaz anesthésiques, et l'élément (K) pouvant être branché fluidiquement entre le patient (P) et un système d'évacuation de gaz (A), et pouvant être relié à une pièce complémentaire qui peut s'ouvrir pour le passage d'au moins un fluide gazeux et la production d'une dépression dans l'élément (K). L'invention est caractérisée en ce que l'élément (K) comporte un déclencheur de l'ouverture de la pièce complémentaire pour le passage de fluide, pouvant être actionné de manière commandée, mais pas par les gaz indésirables. L'élément (K) comporte de préférence une commande (S) associée ou intégrée, permettant de commander le déclencheur.
PCT/IB2012/057540 2011-12-20 2012-12-20 Élément permettant d'améliorer un système d'évacuation des gaz anesthésiques et procédé associé WO2013093841A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102011056681.3 2011-12-20
DE102011056681 2011-12-20
DE102012109866.2 2012-10-16
DE201210109866 DE102012109866B4 (de) 2011-12-20 2012-10-16 Komponente für ein verbessertes Anästhesiegas-Fortleitungssystem und Verfahren dazu

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WO2013093841A1 true WO2013093841A1 (fr) 2013-06-27

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WO (1) WO2013093841A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1552158A (en) * 1976-12-14 1979-09-12 Draegerwerk Ag Installation for exhausting undesired gas
WO2001090611A2 (fr) * 2000-05-25 2001-11-29 Siemens Vdo Automotive Inc. Soupape de commande de la pression de reservoir de carburant
US7628034B2 (en) 2005-05-13 2009-12-08 Anesthetic Gas Reclamation, Llc Method of low flow anesthetic gas scavenging and dynamic collection apparatus therefor
EP2148119A2 (fr) * 2008-07-24 2010-01-27 Deere & Company Agencement de raccord de fluides, combinaison d'un agencement de raccord de fluides avec un agencement de contrôle et combinaison d'une pompe volumétrique variable avec un système de contrôle
WO2011100826A1 (fr) 2010-02-22 2011-08-25 Class 1 Inc. Appareil, systèmes et procédés pour recueillir et récupérer des agents anesthésiques et pour éliminer de l'oxyde nitreux de gaz d'échappement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648537B1 (fr) * 1989-06-16 1991-10-18 Sames Sa Dispositif de raccordement de deux parties de conduit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1552158A (en) * 1976-12-14 1979-09-12 Draegerwerk Ag Installation for exhausting undesired gas
WO2001090611A2 (fr) * 2000-05-25 2001-11-29 Siemens Vdo Automotive Inc. Soupape de commande de la pression de reservoir de carburant
US7628034B2 (en) 2005-05-13 2009-12-08 Anesthetic Gas Reclamation, Llc Method of low flow anesthetic gas scavenging and dynamic collection apparatus therefor
EP2148119A2 (fr) * 2008-07-24 2010-01-27 Deere & Company Agencement de raccord de fluides, combinaison d'un agencement de raccord de fluides avec un agencement de contrôle et combinaison d'une pompe volumétrique variable avec un système de contrôle
WO2011100826A1 (fr) 2010-02-22 2011-08-25 Class 1 Inc. Appareil, systèmes et procédés pour recueillir et récupérer des agents anesthésiques et pour éliminer de l'oxyde nitreux de gaz d'échappement

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