WO2022223679A1

WO2022223679A1 - Ventilator device and patient bed

Info

Publication number: WO2022223679A1
Application number: PCT/EP2022/060527
Authority: WO
Inventors: Dieter Koehler; Gerhard Scheuch; Roland Stangl; Axel Fischer
Original assignee: Aspiair Gmbh
Priority date: 2021-04-23
Filing date: 2022-04-21
Publication date: 2022-10-27
Also published as: DE102021110440A1

Abstract

The invention relates to a ventilator device (100) for filtering and/or evacuating ambient air from a patient's room or treatment room, which comprises a negative pressure source (101) or a connection point for connecting to a negative pressure source (101), a hood (103) and an extraction line (105). The extraction line (105) is ready to be brought into fluid connection with both the hood (103) on one side and the negative pressure source (101) on the other, or is in fluid connection with the hood (103) on one side and the negative pressure source (101) on the other. The present invention also relates to a patient bed (117) which is detachably or non-detachably connected to a claimed ventilator device (100).

Description

description

Ventilation device and patient bed

The present invention relates to a ventilation device according to claim 1 and a patient bed according to claim 21 or according to the preambles or generic terms of these claims.

It is known that e.g. B. SARS-CoV-2 is mainly transmitted by aerosols. Aerosol particles with a diameter of between 0.2 gm and 0.6 gm play a particularly important role.

Particles of this size have a very long dwell time in the room air, since they sediment only slowly and are kept in the air for a long time by turbulence and convection.

The exhaled air of a patient has a higher temperature than the room air and rises due to convection. It carries the virus-laden particles with it and forms a "cloud" of aerosols over the bedridden patient, from which the entire room gradually fills with these particles due to the ever-present air currents.

Since medical personnel mostly work near the head end of the patient's bed and work there when caring for the patient, they are exposed to the dense aerosol cloud where the aerosol and thus the virus load is highest. In addition, with non-invasive forms of ventilation, such as high-flow ventilation in particular, i.e. when using a nasal cannula or mask for the patient to apply an oxygen-gas mixture, the aerosol cloud is unintentionally set in motion, and the virus-contaminated aerosols can spread as a result distribute faster in the room.

Stationary or mobile filter devices suck in the room air and reduce the overall virus load through the provided filter units. They reduce the aerosol density in the patient room.

The volume flows of such air purification devices are in the order of several thousand m ³ /h. Examples include the radial fan RadiCal from ebmpapst with 1,800 m ³ /h and the room air cleaner TAC V+ and the vertical heater TES 200 from TROTEC with 2,500 m ³ /h.

An object of the present invention is to specify a further ventilation device.

Another patient bed should also be specified.

The object according to the invention is achieved by a ventilation device having the features of claim 1 and by a patient bed having the features of claim 21 .

The present invention relates to a ventilation device, in particular for filtering and/or removing air from a patient's or treatment room. The ventilation device has a negative pressure source, for example a suction device or a fan, or it has at least one connection point for connection to a negative pressure source.

Furthermore, the ventilation device has a hood. The hood is intended to be placed over a patient's head area or face. In this way, the majority of aerosols that the patient exhales should preferably already be collected and removed before they are distributed further in the room.

The ventilation device also has a suction line. The suction line is in fluid communication with the hood on the one hand and in fluid communication with the vacuum source on the other hand. In other words: The suction line fluidly connects the hood to the vacuum source. Alternatively, the above components are not yet connected to one another, but are provided for their connection and designed accordingly, e.g. B. by suitable connectors, etc.

The connection point can connect z. B. serve the suction line with the vacuum source, such as a connector of the suction line, which is configured to be connected to a building-side vacuum line as a source.

The present invention also relates to a patient bed which is connected detachably or non-detachably to a ventilation device according to the invention. Embodiments according to the invention can have some, some or all of the following features in any combination, insofar as this is not clearly technically impossible for a person skilled in the art. Advantageous developments of the present invention are also the subject matter of the dependent claims and embodiments.

In all of the following statements, the use of the expression “can be” or “can have” etc. is to be understood as synonymous with “is preferably” or “has preferably” etc. and is intended to explain embodiments according to the invention.

Whenever numerical words are mentioned herein, the person skilled in the art understands them as indicating a numerical lower limit. Provided that this does not lead to a discernible contradiction for the person skilled in the art, the person skilled in the art always reads "at least one" or "at least one" when specifying "a" or "an". This understanding is also encompassed by the present invention, as is the interpretation that a numerical word such as "a" can alternatively be meant as "exactly one" wherever this is clearly technically possible for a person skilled in the art. Both are encompassed by the present invention and apply to all numerals used herein.

Where reference is made herein to an embodiment, this represents an exemplary embodiment according to the invention.

Where it is disclosed herein that the subject matter of the invention has one or more features in a particular embodiment, it is also disclosed herein that the subject matter of the invention comprises precisely that or this feature(s) expressly does not have in other embodiments that are also according to the invention, e.g. B. in the sense of a disclaimer. For each embodiment mentioned herein, the contrary embodiment, for example formulated as a negation, is also disclosed.

In some embodiments of the ventilation device according to the invention, the negative pressure source is configured to generate a volume flow, preferably less than 1000 m ³ /h, more preferably in a range between 100 m ³ /h and 500 m ³ /h, most preferably in a range between 100 ^m3 /h and 200 ^m3 /h.

In some embodiments, the ventilation device further includes an air filter.

In some embodiments, the air filter is or includes a class H13 or H14 (according to EN 1822-1:2009) particulate filter. The particles considered relevant here, which are to be filtered, are in the order of a few hundred nanometers. In particular, it should preferably be possible to filter particles <1 gm.

The air filter is located within the vacuum source in some embodiments. Other arrangements of this filter, for example at the connection of the suction line to the hood or inside the suction line, for example at its beginning or end, are also covered by the present invention. In some embodiments, the ventilation device according to the invention also has a positioning system.

The positioning system serves to position the hood in space and has at least one, two or more joints which are provided between rigid components of the positioning system. In this way, several rigid components can be connected to one another by means of joints. The joints can allow the components connected by them to move about the same joint axis in each case, or they can differ in this respect and allow the positioning system to be adjusted about a number of spatial axes, optionally about one or more axes of rotation.

The positioning system thus enables the hood to be positioned flexibly and smoothly in a space above a patient.

In some embodiments, a joint, or the only joint, is also arranged between the positioning system and the hood.

In some embodiments, the positioning system is attached to the patient bed, in others it is not.

In some embodiments, the positioning system is placed on and/or attached to the floor.

In some embodiments, the ventilation device also has at least one locking device for locking at least one of the joints. Thus, the position of the hood in the space above the patient can be determined. In certain embodiments, a wing screw, a knurled screw or the like can be provided as the locking device. Other configurations of the locking device are also encompassed by the present invention.

In some embodiments, the ventilation device further comprises a lug which is used to connect the ventilation device or a component thereof to a receptacle portion or receptacle which in turn is arranged at a patient bed.

In some embodiments, the suction line of the ventilation device according to the invention is at least in sections a flexible hose or has such a hose.

In some embodiments, the suction line is arranged at least in sections within the positioning system.

In some embodiments, the hood of the ventilation device according to the invention is made at least in sections from transparent material.

In some embodiments, the hood is made of a thermoplastic material, such as. B. polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), a glycol-modified PET (PETG), etc., manufactured or has such a material.

In some embodiments, the hood is manufactured using a thermoplastic deep-drawing process, this can advantageously contribute to keeping the production costs low.

In some embodiments, the hood has an opening area of at least 500 cm ² , preferably at least 1000 cm ² .

The distance between the hood and the patient should be kept as small as possible without restricting the patient too much. With suction capacities between 100 m ³ /h and 200 m ³ /h, distances from the patient's mouth to the base of the hood of 15 cm to a maximum of 30 cm are sensible and possible.

In some embodiments, precautions or devices for noise reduction can be provided on the hood, for example by the mouth of the suction line in the hood not being aimed directly at the patient, but z. B. at an angle (z. B. greater than 100 ° or less than 80 °), or a wall or a baffle is positioned in front of the outlet or the inlet of the suction duct, such as inside the hood, which dampens the noise emission of the vacuum source.

In some embodiments, the noise emission of the ventilation device according to the invention is reduced by a suitable selection of the radii in the fluidic path, in particular in the suction line. In order to prevent or minimize the noise emission caused by the separating flow, it has proven to be advantageous if the existing edges in the fluidic path have radii of at least 5 mm to 20 mm. In some embodiments, the ventilation device therefore has one or more edges or transitions which have a radius or indicated radius of at least 5 mm to 20 mm, or only such edges or transitions, in particular in surfaces or inner surfaces that come into contact with negative pressure.

In some embodiments, the suction line in particular has such or only such edges or transitions, one or more, preferably on its inside.

In some embodiments, the hood has, at least in sections, the shape of a spherical cap or a truncated pyramid with a preferably rectangular base area.

In some embodiments, the hood is preferably an asymmetric, preferably flat, truncated pyramid that can be adjusted to different positions of the patient, for example lying or sitting, using the positioning system. Whenever a "flat truncated pyramid" is mentioned, this means a truncated pyramid whose height preferably corresponds at most to the shorter edge of its, e.g. rectangular, base or opening plane or surface. In particular, this can be a truncated pyramid with a height between 150 mm and 300 mm, preferably with a height of 200 mm. Such a configuration can have advantages in terms of flow technology, which can have a favorable effect on the flow noise. By lengthening the contour in the longitudinal direction, one can also do justice to the flow conditions in the space above a patient who is being ventilated in bed using high-flow ventilation.

In some embodiments, flat, transparent segments of the hood allow a preferably distortion-free view of or for the patient when their head is covered by the hood.

In some embodiments, the hood has at least one closable opening, e.g. B. on one side of the truncated pyramid, which does not correspond to the opening area but an opening z. B. one

Side surface element is. The opening can preferably serve as a reach-through for at least one hand, for example for the purpose of care, supply and/or monitoring services, it being possible for a closure, for example in the form of a sliding door, a flap or the like, to be provided.

In some embodiments, the hood has a rigid side surface element and at least one flexible side surface element, which are preferably detachably connected to one another. For example, Velcro fasteners, snap fasteners, etc. can be used for the connection.

When a "flexible" side surface element is mentioned here, "flexible" refers in particular to its material properties. In some embodiments, the flexible side panel would gravitate downward, similar to a curtain, and thereby folding, warping, etc., unless prevented from doing so.

In some embodiments, the hood has a greater extent in a longitudinal direction of the hood than in a transverse direction of the hood.

In some embodiments, the hood consists at least in sections of foil material or has such a material.

In some embodiments, the foil material has a mechanical reinforcement, for example in the form of one or more struts.

In certain embodiments it can be provided that the hood is made exclusively of foil material with optional additional struts. These embodiments are advantageously inexpensive to manufacture. In this way, a new hood could be used for each patient, which means that time-consuming cleaning and sterilization can be avoided.

In some embodiments, the ventilation device according to the invention also has at least one additional suction line and/or at least one additional hood.

In some embodiments, several or all suction lines or several or all hoods can each optionally be connected to a common vacuum source. In this way, more than just one patient can be cared for using one ventilation device. In some embodiments, the costs or the overall noise development can/can thereby be reduced.

In some embodiments, the ventilation device also has a control or regulating device that is configured and arranged to vary the suction power of the vacuum source, to monitor the state of the air filter, and/or to take on other tasks.

In some embodiments, the control or regulating device is configured to vary, in particular automatically, the suction power of the vacuum source depending on a position of a component of the ventilation device in the room and/or on a position of two components of the ventilation device relative to one another.

In some embodiments, the ventilation device according to the invention also has at least one distance sensor or one position sensor. The distance sensor can be programmed, for example, to measure the distance of the hood z. B. from the patient's bed or from the patient.

The position sensor can be programmed to determine the position of components of the positioning system. This information can be evaluated by the control or regulating device. You can be programmed to via actuators such. B. hydraulic or electric,

Motors etc. to operate according to the positioning system, to adjust or the like. In some embodiments, the control or regulating device of the ventilation device is configured to cause the negative pressure source to vary the suction power depending on the distance measured by the distance sensor. Alternatively or additionally, the control or regulating device is configured to cause an output for a user, e.g. B. by means of a display device.

In some embodiments of the patient bed according to the invention, a first component of the ventilation device is connected to the patient bed at a first connection point thereof, with a second component of the ventilation device being connected to the patient bed at a second connection point thereof. Here, the first connection point and the second connection point are spaced apart from one another, preferably by at least 1.0 m, 1.2 m, 1.5 m or more.

In some embodiments, the socket for the attachment of the suction line is pivotable for connection to the patient bed, in particular its support.

In some embodiments it can be provided that the hood is moved in a gesture-controlled manner, i. H. to change their position.

In some embodiments, the ventilation device is attached to the patient bed. This is particularly advantageous if the patient beds in the room or on the ward have to be rearranged. Alternatively, the ventilation device is on the floor, for example at the head end or at the foot end of the patient's bed. With that can advantageously a ventilation device, which was initially used over a first patient bed, in a simple manner over a second, the first z. B. adjacent patient bed.

In some embodiments, the vacuum source and the air filter are arranged in a common housing, in other embodiments not. The housing can have a suitable connection for the suction line.

In some embodiments, the suction line of the vacuum source can be regulated, in particular by means of the control or regulating device, in particular from 50 m ³ /h to 200 m ³ /h, in particular at the lowest possible speed.

In some embodiments, the negative pressure source causes a volume flow of at most 150 m ³ /h.

In some embodiments, the vacuum source effects a nominal volume flow of at most 70 m ³ /h.

In some embodiments, the negative pressure source can be regulated steplessly, in particular in the range between 50 m ³ /h and 150 m ³ /h.

In some embodiments, the maximum negative pressure generated is 3500 Pa.

In some embodiments, an electrical connection with the values 0.15 kW, 230 V, 0.95 A and/or 50/60 Hz is provided for a vacuum source. In some embodiments, the dimensions for the vacuum source are no more than 550 mm in a first dimension (eg, height), no more than 350 mm in a second dimension (eg, width), and/or no more than 250 mm in a third dimension (e.g. depth).

In some embodiments, the hood has a height of between 150 mm and 300 mm, preferably 200 mm.

In some embodiments, the hood has a base area of between 0.2 m ² and 0.4 m ² , preferably 0.3 m ² .

In some embodiments, the hood has a wall thickness of between 0.1 mm and 10 mm, preferably between 1 and 8 mm, particularly preferably between 4 mm and 6 mm, at least in sections.

In some embodiments, the suction line has a length of between 1 m and 5 m, preferably between 2 m and 4 m, particularly preferably between 3 m and 4 m.

In some embodiments, the suction line has a diameter of between 30 mm and 100 mm, preferably 50 mm. Such a diameter reduces the flow velocities and thus the noise emissions.

In some embodiments, the suction line is made of a plastic, such as. B. thermoplastic elastomers (TPE), polyvinyl chloride (PVC), silicone, polystyrene (PS), etc., made or has such a material.

In some embodiments, the aerosol in the suction line or in the vacuum source before, in or after exposed to ultraviolet light (UV-C rays) with the optional filter. D this can contribute particularly advantageously to further reducing the risk of contamination, for example during the filter change. Appropriate facilities can be provided. An optional irradiation with, for example, ultraviolet light in the filter is also covered by the present invention.

In some embodiments, at least parts of the ventilation device can be hygienically reprocessed in such a way that they or the corresponding parts can be reused.

In some embodiments, controls for controlling the ventilation device are arranged on the hood. The user can use the operating elements to influence or initiate the control of the ventilation device using the control or regulating device.

In some embodiments, the ventilation device does not have an air outlet device that has a disinfection device.

In some embodiments, the ventilation device does not have a disinfection system selected from UV emitters and ozone chambers, with a downstream catalyst configured to remove the excess ozone; e.g. B. platinum or a transition metal oxide can be used as a catalyst. In some embodiments, not all components of the ventilation device are supported by an adjustable support structure that is adjustable in height.

In some embodiments, the ventilation device does not have a disinfection device, in particular not one that is carried by an adjustable support structure that is adjustable in height.

In some embodiments, the ventilation device does not have filters or absolute filters, in particular not supported by an adjustable support structure that is adjustable in height.

In some embodiments, the vacuum source is not supported by an adjustable support structure

Worn ventilation device, which is adjustable in height.

Some or all embodiments according to the invention can have one, several or all of the advantages mentioned above and/or below.

Using the present invention, it may advantageously be possible to filter out virus-contaminated aerosols in the vicinity of the patient and thus noticeably reduce the risk of infection with SARS-CoV-2 or other airborne diseases for the medical staff. This can be particularly advantageous in a Covid-19 or intensive care unit and thus makes a noticeable contribution to the safety of medical staff. While mobile filter devices from the prior art have to achieve very high volume flows of around 2,000 m ³ /h in order to achieve a sufficient filter effect, the present invention can advantageously be used at a significantly lower volume flow, for example in the order of 100 m ³ /h up to 200 m ³ /h), a very good filter effect can be achieved. Advantageously, lower volume flows also produce lower noise emissions.

Almost all contaminated aerosols emitted by the patient can advantageously be filtered by means of the present invention, which corresponds to a high level of efficiency and can also help to significantly reduce the number of infections or even to prevent infections entirely.

Advantageously, the present invention can be used directly in a sickroom because it can meet the standards required therefor. In particular, it can be used several times because it can be hygienically processed.

Another advantage of the present invention can be its user-friendliness, since it is easy to use and flexible to use. It can thus make the everyday work of medical staff easier, especially on Covid-19 and other relevant hospital wards.

The arrangement of the present invention restricts the possibilities of nursing activities on the patient only slightly. It can therefore be used to advantage in the care of highly infectious patients. A transparent design of the present invention means that the patient's vision is impaired as little as possible. This can advantageously contribute to

Reduce anxiety in patients and increase their sense of security.

Stationary or mobile filter devices suck in the air in places that are comparatively far away from the patient. Although this reduces the overall virus load, it does not prevent the locally higher concentration above the patient and medical staff are therefore still exposed to a high virus load. The present invention, however, sucks in the viruses before they spread in space, thus avoiding the above problem.

The present invention is described below purely by way of example and in a schematically simplified manner with reference to the attached figures. In them, the same reference symbols designate the same or similar components. The following applies:

1 shows a ventilation device according to the invention in a first embodiment;

2a shows the hood of a ventilation device according to the invention in a further embodiment viewed from the bottom left;

2b shows the hood of a ventilation device according to the invention in a further embodiment viewed from the bottom left; 3 shows the ventilation device according to the invention in a further embodiment;

4 shows the ventilation device according to the invention in a further embodiment;

5 shows the ventilation device according to the invention in a further embodiment;

6 shows the ventilation device according to the invention in a further embodiment;

7 shows the ventilation device according to the invention in a further embodiment;

8a shows the ventilation device according to the invention in a further embodiment;

8b shows the ventilation device according to the invention in a further embodiment;

9a shows the hood of the ventilation device according to the invention in a further embodiment over the face of a patient;

Figure 9b shows the hood of Figure 9a closer to the patient; and

10 shows the ventilation device according to the invention in a further embodiment. Fig. 1 shows, in a schematically simplified manner, a ventilation device 100 according to the invention for filtering and/or removing room air from a patient or treatment room in a first embodiment.

A patient P in a patient bed 117 is indicated

Vacuum source 101 of the ventilation device 100 is arranged, which is connected to a hood 103 via a positioning system 109 . The positioning system 109 can have at least two joints 109a, 109b, which are provided between rigid components of the positioning system 109. By means of these joints 109a, 109b that is

Positioning system 109 can be adjusted in a simple manner and the hood 103 can be positioned as desired, for example, above the patient or his face.

The ventilation device 100, as shown by way of example in the embodiment of FIG

Have locking device 111, which is used to lock at least one of the joints. The locking device 111 can be, for example, a hand-operated thumb screw, other forms and configurations of locking devices are also encompassed by the present invention.

In the embodiment of FIG. 1, the hood 103 is optionally designed in the shape of a bell.

The hood 103 is positioned above and over the patient's face in FIG. 1 to capture aerosols exhaled by the patient before they disperse in the patient room. The aerosols are as dots indicated, their entirety indicates an aerosol cloud in FIG.

The vacuum source 101 and the hood 103 are fluidly connected to one another by means of a suction line 105 of the ventilation device 100 . In the embodiment of FIG. 1 , the suction line 105 runs, for example, within the positioning system 109 or is arranged along it.

Preferably, the negative pressure source 101 is configured to generate a volume flow in a range between 100 m ³ /h and 200 m ³ /h. The aerosols are conveyed or sucked off from the hood 103 via the suction line 105 to the vacuum source 101 by means of the volume flow, which is indicated by two arrows inside the hood 103 .

An optional air filter 107 is located within the vacuum source 101 in the embodiment of FIG. Other arrangements of this filter, for example at the connection of the suction line to the hood 103 or inside the suction line 105, are also covered by the present invention.

The relevant particles that need to be removed or filtered are in the order of a few hundred nanometers. The air filter 107 can, for example, be or include a particulate filter for particles <1 gm, for example class H13 or H14 (according to EN 1822-1:2009).

The filtered air can be released into the environment, this is indicated in FIG. 1 by an arrow pointing to the right. The ventilation device 100 preferably also has a control or regulating device 150 which can optionally be configured to vary the suction capacity of the vacuum source 101 . As in the embodiment of FIG. 1, the control or regulating device 150 can be present within the vacuum source 101, that is to say in a common housing; in other versions it can form a separate unit.

Fig. 2a shows a schematically simplified hood 103 of a ventilation device 100 according to the invention in a further embodiment. The hood of FIG. 2a has the shape of a spherical cap.

You can see the connection of the suction line 105 in the hood 103.

Fig. 2b shows a schematically simplified hood 103 of a ventilation device 100 according to the invention in a further embodiment. The hood 103 of FIG. 2b has the shape of a truncated pyramid with a rectangular base. In this embodiment, it has a greater extension in a longitudinal direction L of the opening area 103a than in a transverse direction Q of the opening area 103a.

You can see the connection of the suction line 105 in the hood 103.

All of the embodiments of the hood 103 shown here are preferably made of transparent material, at least in sections. This allows the medical staff unobstructed view of the patient and the patient a view of their surroundings.

The hood 103 should be as large as possible in order to completely accommodate the ejected aerosol cloud. In the embodiments shown herein, the hood 103 has an opening area 103a of at least 500 cm ² , preferably at least 1000 cm ² .

Fig. 3 shows a further embodiment of the ventilation device 100 according to the invention in a schematically simplified manner.

The embodiment of FIG. 3 largely corresponds to that of FIG. 1. In order to avoid repetition, reference is made to the statements made there. The differences will be discussed below.

In this embodiment, the vacuum source 101 and the hood 103 are fluidically connected by means of the suction line 105, which here, as in any other embodiment, is or can be at least partially a flexible hose or has such a hose.

In the embodiment of FIG. 3, the

Ventilation device 100 also has a lug 113 which can be connected to a receptacle 115 of the patient bed 117 . The hood 103 with the connected suction line 105 (which is flexible in sections) can thus be positioned above the patient or his face.

The approach 113 can be adjustable in height.

In order to make it easier for the medical staff to access the patient P, the receptacle 115 on the patient bed 117 be designed to be pivotable and thus enable the ventilation device 100 to be pivoted away from the patient P if necessary, e.g. B. by means of rotation about a vertical axis. Once the patient has been taken care of, it can be swiveled back again to continue discharging aerosols.

Fig. 4 shows a further embodiment of the ventilation device 100 according to the invention in a schematically simplified manner.

FIG. 4 also largely corresponds to FIG. 1. In order to avoid repetition, reference is made to the explanations given there. In the following, only the differences will be discussed.

In this embodiment, the hood 103 has the shape of a truncated pyramid.

The hood 103 can have at least one closable opening 104 on one side of the truncated pyramid. This can serve as a reach-through for a hand, for example of the medical staff, for example in order to carry out care, supply or monitoring services.

The closure can, for example, have the shape of a sliding door, a flap or the like.

Fig. 5 shows a further embodiment of the ventilation device 100 according to the invention in a schematically simplified manner.

FIG. 5 also largely corresponds to FIG. 1. In order to avoid repetition, reference is made to the explanations given there. In the following, only the differences will be discussed. The hood 103 also has the shape of a truncated pyramid in this embodiment.

Furthermore, the ventilation device 100 has a rigid side surface element 103b and some flexible side surface elements 103c. For the sake of clarity, the flexible ones

Side surface elements 103c are shown as opaque, so that the patient P lying behind them in the patient bed 117 is not visible in FIG. 5 . A transparent configuration of the flexible side surface elements 103c is nevertheless covered by the present invention. The number of flexible side surface elements 103c, as shown in FIG. 5, is purely exemplary and not to be understood as limiting.

The flexible side surface elements 103c can be connected—preferably detachably—both to the rigid side surface element 103b and to one another.

Connections can be designed, for example, by means of Velcro fasteners, snap fasteners, etc., or can include them.

In some embodiments, the flexible side surface elements 103c can also be provided in the form of a slat curtain.

Fig. 6 shows a further embodiment of the ventilation device 100 according to the invention in a schematically simplified manner.

The embodiment of FIG. 6 corresponds in large part to FIG. 5. To avoid repetition, reference is made to FIG statements made there. In the following, only the differences will be discussed.

In this embodiment, the hood 103 consists at least in sections of foil material. In addition to the foil material, the flexible side surface elements 103c arranged in this way have a mechanical reinforcement, for example in the form of one or more struts 119. In FIG. 6, the struts form the shape of an “X”. Other shapes or configurations of struts 119 are also encompassed by the present invention. The number of struts 119, as shown in FIG. 5, is also purely exemplary and should not be understood as limiting.

Fig. 7 shows a further embodiment of the ventilation device 100 according to the invention in a schematically simplified manner.

The embodiment of FIG. 7 largely corresponds to FIG. 4. In order to avoid repetition, reference is made to the statements made there. In the following, only the differences will be discussed.

In this embodiment, the hood 103 has an asymmetrical, flat truncated pyramid, which can be adjusted to different positions of the patient with the aid of the positioning system. In particular, the opening surface 103a (see FIG. 2b) can be tilted and thereby positioned closer to the patient P or above the patient's bed 117.

By lengthening the contour in the longitudinal direction, the application with high-flow ventilation, i.e. when using a nasal cannula or mask for the patient P for the application of an oxygen-gas mixture, are well covered.

In some embodiments, flat, transparent segments of the hood 103 allow a distortion-free view of or for the patient P.

Fig. 8a shows a further embodiment of the ventilation device 100 according to the invention in a schematically simplified manner.

The embodiment of FIG. 8a largely corresponds to that of FIG. 3. In order to avoid repetition, reference is made to the statements made there. In the following, only the differences will be discussed.

In this embodiment, the vacuum source 101 is positioned at the foot end of the patient bed 117 according to the invention. It can be attached to the patient's bed 117 there (see FIG. 8b) or stand on the floor.

The suction line 105 is routed above the bed. This can be done using known fixtures in the patient's room or at the patient's bed 117 .

A preferred routing of the suction line 105 is explained in more detail with reference to FIG. 8b.

Fig. 8b shows a schematically simplified ventilation device 100 according to the invention in a further embodiment.

The embodiment of FIG. 8b largely corresponds to that of FIG. 8a. To avoid repetition, on reference is made to the statements there. In the following, only the differences will be discussed.

The vacuum source 101 is also positioned at the foot end of the patient's bed 117 in this embodiment. A first component of the ventilation device 100, here the vacuum source 101 is connected to a first connection point 130 of the patient bed 117 with this, with a second component of the

Ventilation device 100, here the suction line 105, is connected to a second connection point 131 of the patient's bed 117 with this.

Here, the first connection point 130 and the second connection point 131 are spaced apart from one another. In the present example of FIG. 8b, the distance between the first connection point 130 and the second connection point 131 is almost a bed length.

In this embodiment, the suction line 105 is first routed below the patient's bed 117 and only at the head end thereof upwards. This guidance of the suction line 105 is less at risk of being impaired by the activities of the medical staff on the patient P. Conversely, this guidance of the suction line 105 also impairs the medical staff when carrying out their work on the patient P less or not at all.

Fig. 9a shows a schematically simplified hood 103 of the ventilation device 100 according to the invention in a further embodiment over the face of a patient P. In this embodiment, ventilation device 100 also has a distance sensor 121, which is programmed here, for example, to determine or measure distance D, represented by a double arrow, between hood 103 and patient P or patient bed 117.

In these specific embodiments, the control or regulating device 150 is configured to cause the vacuum source 101 to increase the suction power when the distance D is large, or at least to vary it depending on the distance determined or measured by the distance sensor 121 .

Fig. 9b shows the hood 103 of FIG. 9a in a schematically simplified manner at a smaller distance from the patient P.

FIG. 9b shows that the distance D between hood 103 and patient P or patient bed 117, which distance sensor 121 would determine or measure here, is smaller than in FIG. 9a.

In these specific embodiments, the control or regulating device 150 is configured to cause the vacuum source 101 to throttle the suction power when the distance D is small, or at least to vary it depending on the distance determined or measured by the distance sensor 121 .

Alternatively or additionally, in the embodiments of FIGS. 9a and 9b, the control or regulation device 150 can cause an output to the user, for example by means of a display device. Fig. 10 shows a further embodiment of the ventilation device 100 according to the invention in a schematically simplified manner.

FIG. 10 essentially corresponds to FIG. 3. Reference is also made here to the explanations relating to this figure and only the differences are emphasized.

In the embodiment of FIG. 10, the ventilation device 100 has a further suction line 105' and a further hood 103' for the care of a further patient P. Both suction lines 105, 105' or both hoods 103, 103' can each optionally be connected to the common vacuum source 101. The number of vacuum sources 101, the

Suction lines 105, 105' or the hoods 103, 103' in FIG. 10 is purely an example. Other negative pressure sources, suction lines and/or hoods can be provided and are included in the present invention.

reference character list

100 ventilation device

101 vacuum source

103 hood

103a opening surface

103b Side panel element, rigid

103c side panel, flexible

103' more hoods

104 opening

105 suction line 105' additional suction line 107 air filter 109 positioning system 109a joint of the positioning system 109 109b joint of the positioning system 109 111 locking device 113 attachment 115 receptacle 117 patient bed 119 struts 121 distance sensor

130 first junction

131 second connection point 150 control and regulation device

L longitudinal direction of the hood 103

Q transverse direction of the hood 103 p patient

D Distance between patient/patient bed and

distance sensor

Claims

Expectations

1. Ventilation device (100) for filtering and/or removing room air from a patient or treatment room, comprising: a negative pressure source (101) or a connection point for connection to a negative pressure source (101); a hood (103); a suction line (105) which is prepared to be brought into fluid communication with the hood (103) on the one hand and the vacuum source (101) on the other hand, or which is in fluid communication with the hood (103) on the one hand and the vacuum source (101) on the other hand .

2. Ventilation device (100) according to claim 1, wherein the negative pressure source (101) is configured to have a volume flow in a range between 100 m ³ /h and 500 m ³ /h, preferably between 100 m ³ /h and 200 m ³ / h, to generate .

3. Ventilation device (100) according to any one of the preceding claims, further comprising an air filter (107).

Ventilation device (100) according to claim 3, wherein the air filter (107) is or comprises a class H13 or H14 particulate filter (according to EN 1822-1:2009).

5. Ventilation device (100) according to one of the preceding claims, further comprising a positioning system (109) for positioning the hood (103) in space, with one, two or more joints (109a, 109b) which are connected between rigid components of the positioning system (109 ) are provided.

6. Ventilation device (100) according to claim 5, further comprising at least one locking device (111) for locking at least one of the joints (109a, 109b).

7. Ventilation device (100) according to any one of the preceding claims, further comprising an attachment (113) for connecting the ventilation device (100) to a receiving portion or a receiving portion (115) of a patient bed (117).

8. Ventilation device (100) according to one of the preceding claims, wherein the suction line (105) is at least partially a flexible hose or has such a hose.

9. ventilation device (100) according to any one of the preceding claims, wherein the hood (103) is made at least partially of transparent material.

10. Ventilation device (100) according to any one of the preceding claims, wherein the hood (103) has a

opening area (103a) of at least 500 cm ² , preferably at least 1000 cm ² .

11. Ventilation device (100) according to any one of the preceding claims, wherein the hood (103) has the shape of a spherical cap or a truncated pyramid with a preferably rectangular base.

12. Ventilation device (100) according to one of the preceding claims, wherein the hood (103) has at least one closable opening (104) which can serve as a passage for a hand, with a closure, for example in the form of a sliding door, a flap or the like , is provided.

13. Ventilation device (100) according to one of the preceding claims, wherein the hood (103) has a rigid side surface element (130b) and at least one flexible side surface element (103c), which are preferably detachably connected to one another, for example by means of one or more Velcro fasteners, snap fasteners, etc.

14. Ventilation device (100) according to any one of the preceding claims, wherein the hood (103) has a greater extent in its longitudinal direction (L) than in its transverse direction (Q).

15. Ventilation device (100) according to one of the preceding claims, wherein the hood (103) consists at least in sections of film material, which preferably has a mechanical reinforcement, for example in the form of one or more struts (119).

16. Ventilation device (100) according to one of the preceding claims, further comprising at least one further suction line (105') and/or at least one further hood (103').

17. Ventilation device (100) according to any one of the preceding claims, further comprising a control or regulating device (150) which is configured and arranged to vary the suction power of the vacuum source (101).

18. Ventilation device (100) according to claim 17, wherein the control or regulating device (150) is configured to adjust the suction power of the vacuum source (101) as a function of a distance of one of the components of the ventilation device (100) in relation to a spatially fixed point or a Point of the patient bed (117) or the patient (P), from a position of a component of the ventilation device (100) in space and / or from a position of two components of

Ventilation device (100) to vary each other.

19. Ventilation device (100) according to claim 18, further comprising a distance sensor (121) which z. B. is programmed, the distance of the hood (103), z. B. from the patient bed (117) or from the patient (P), or a position sensor which is programmed to determine the position.

20. Ventilation device (100) according to any one of claims 17 to 19, wherein the control or regulating device (150) is configured to cause the vacuum source (101) to increase the suction power as a function of the to vary the distance measured by means of the distance sensor (121) or the position determined by means of the position sensor and/or to cause an output for a user, e.g. B. by means of a display device.

21. Patient bed (117), detachably or non-detachably connected to a ventilation device (100) according to any one of the preceding claims.

22. Patient bed (117) according to claim 21, wherein a first

Component of the ventilation device (100) is connected to the patient bed (117) at a first connection point (130) of the latter, wherein a second component of the ventilation device (100) is connected to the patient bed (117) at a second connection point (131) of the latter, and wherein the first connection point (130) and the second connection point (131) are spaced from each other.