Carbon dioxide absorption bottle, carbon dioxide absorption device and anesthesia respirator

Abstract

The utility model provides a carbon dioxide absorption bottle, a carbon dioxide absorption device and an anesthesia respirator, and relates to the technical field of anesthesia respirators. The carbon dioxide absorption bottle comprises a bottle body and a bottle bottom detachably installed at the bottom of the bottle body in a sealed mode, a bottle opening of the bottle body can be detachably connected with a second communicating branch pipe of the three-way connector in a sealed mode, and a first breathable limiting plate is arranged at the position, close to the bottle opening, in the bottle body. A material used for absorbing carbon dioxide is placed between the first breathable limiting plate and the bottle bottom in a limited mode, a guide pipe is installed on the first breathable limiting plate, and an air inlet pipe of the three-way connector extends into the guide pipe of the carbon dioxide absorption bottle from the second communicating branch pipe and is attached to the inner side wall of the guide pipe. The end, close to the bottle bottom, of the guide pipe can guide gas entering the guide pipe to flow through a material used for absorbing carbon dioxide, and the gas flows out of a bottle opening of the bottle body. The carbon dioxide absorption bottle can be matched with the three-way connector to reduce the concentration of carbon dioxide in gas finally entering the gas inlet pipe of the anesthesia breathing machine.

Description

Technical Field

[0001] The utility model relates to the technical field of anesthesia breathing machines, in particular to a carbon dioxide absorption bottle, a carbon dioxide absorption device and an anesthesia breathing machine. Background Art

[0002] At present, anesthesia ventilators play a vital role in the modern medical field and provide important guarantees for the safety and success of surgery. During general anesthesia surgery, the anesthesia ventilator connects to the patient by inserting a tracheal tube to control the patient's breathing and ensure the stability of the patient's physiological parameters. The exhaled gas (containing carbon dioxide mixed gas, mainly oxygen, or containing anesthetic gas) in the breathing circuit of the anesthesia ventilator is absorbed by the carbon dioxide absorption tank and then re-enters the breathing circuit for use, ensuring that the patient will not repeatedly inhale this gas, thereby ensuring the patient's life safety.

[0003] Among them, the calcium / soda lime in the carbon dioxide absorption tank reacts chemically with the carbon dioxide in the breathing circuit to remove the carbon dioxide in the patient's exhaled air. When the calcium / soda lime loses its absorption capacity after a certain period of use, the carbon dioxide absorption tank needs to be removed and replaced. In the existing technical solution, a three-way connector is installed on the breathing pipeline of the anesthesia ventilator. The three connecting branches of the three-way connector are respectively sealed and connected to the outlet pipe of the breathing pipeline of the anesthesia ventilator, the carbon dioxide absorption bottle and the air inlet pipe of the anesthesia ventilator. However, the existing carbon dioxide absorption bottle cannot ensure that all the gas in the air outlet pipe of the breathing pipeline of the anesthesia ventilator flows through the calcium / soda lime in the carbon dioxide absorption bottle, resulting in a high concentration of carbon dioxide in the gas that finally enters the air inlet pipe of the anesthesia ventilator. Therefore, it is necessary to design a carbon dioxide absorption bottle that can reduce the concentration of carbon dioxide in the gas that finally enters the air inlet pipe of the anesthesia ventilator. Utility Model Content

[0004] In response to the above-mentioned problems in the prior art, the present application proposes a carbon dioxide absorption bottle, a carbon dioxide absorption device and an anesthesia ventilator, which can cooperate with a three-way connector to reduce the carbon dioxide concentration in the gas that eventually enters the air inlet pipe of the anesthesia ventilator.

[0005] One aspect of the utility model provides a carbon dioxide absorption bottle, which includes a bottle body and a bottle bottom detachably and sealably installed on the bottom of the bottle body, the bottle mouth of the bottle body can be detachably and sealably connected to the second connecting branch of a three-way connector, a first air permeable limiting plate is provided near the bottle mouth of the bottle body, a material for absorbing carbon dioxide is limitedly placed between the first air permeable limiting plate and the bottle bottom, a guide tube is installed on the first air permeable limiting plate, an air inlet pipe of the three-way connector can extend to the end of the guide tube near the bottle mouth and fit with the inner side wall of the guide tube, and the end of the guide tube near the bottle bottom can guide the gas entering the guide tube to flow through the material for absorbing carbon dioxide and flow out from the bottle mouth of the bottle body.

[0006] As a further improvement of the above technical solution:

[0007] The above-mentioned carbon dioxide absorption bottle, further, the bottle bottom includes a bottom plate, a second air permeable limiting plate is supported and installed on the bottom plate, a limiting hole is opened on the second air permeable limiting plate, the material for absorbing carbon dioxide is limitedly placed between the first air permeable limiting plate and the second air permeable limiting plate, the end of the guide tube close to the bottle bottom can pass through the limiting hole, and the gas entering the guide tube passes through the second air permeable limiting plate and flows through the material for absorbing carbon dioxide.

[0008] The above-mentioned carbon dioxide absorption bottle further comprises: a first supporting ring plate is provided on the bottom plate, the second air-permeable limiting plate is supported and installed on the first supporting ring plate, and the first supporting ring plate can be attached to the inner wall of the bottle body.

[0009] The above-mentioned carbon dioxide absorption bottle further comprises a second supporting ring plate at the bottle mouth of the bottle body, and the first air permeable limiting plate is installed on the second supporting ring plate.

[0010] The above-mentioned carbon dioxide absorption bottle further has the feature that at least two clamping blocks are provided at intervals along the circumferential direction on the inner side wall of the second supporting ring plate.

[0011] The above-mentioned carbon dioxide absorption bottle further has a sealing ring at the bottle mouth of the bottle body.

[0012] The above-mentioned carbon dioxide absorption bottle, further, the bottle body is square.

[0013] Another aspect of the utility model provides a carbon dioxide absorption device, which includes a three-way connector and a carbon dioxide absorption bottle as described above, wherein the bottle mouth of the carbon dioxide absorption bottle is detachably and sealedly connected to the second connecting branch of the three-way connector, and the air inlet pipe of the three-way connector extends to the end of the guide tube close to the bottle mouth and fits against the inner wall of the guide tube.

[0014] Another aspect of the utility model provides an anesthesia breathing machine, which includes the carbon dioxide absorption device as described above.

[0015] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the utility model can be achieved.

[0016] The utility model provides a carbon dioxide absorption bottle, a carbon dioxide absorption device and anesthesia breathing machine, which have at least the following beneficial effects compared with the prior art: when in use, the carbon dioxide absorption bottle is sealed and connected with the second end of the second connecting branch pipe of the three-way connector through the second sealing connector of the three-way connector, and the gas exhaled by the user of the anesthesia breathing machine enters the guide pipe from the air inlet pipe of the three-way connector, and the end of the guide pipe close to the bottom of the bottle guides the gas entering the guide pipe to flow through the material for absorbing carbon dioxide, and flows out from the bottle mouth of the bottle body to the third connecting branch pipe of the three-way connector, and finally enters the air inlet pipe of the anesthesia breathing machine along the third connecting branch pipe.

[0017] Since the gas exhaled by the user of the anesthesia ventilator must flow through the material for absorbing carbon dioxide before finally entering the air inlet pipe of the anesthesia ventilator, the carbon dioxide concentration in the gas finally entering the air inlet pipe of the anesthesia ventilator is reduced as much as possible.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0021] Figure 1 A schematic diagram of the structure of a three-way connector provided by an embodiment of the utility model is shown;

[0022] Figure 2 A cross-sectional view of a three-way connector provided by an embodiment of the utility model is shown;

[0023] Figure 3 A schematic diagram of the structure of a carbon dioxide absorption bottle provided by an embodiment of the utility model is shown;

[0024] Figure 4 A cross-sectional view of a carbon dioxide absorption bottle provided by an embodiment of the utility model is shown;

[0025] Figure 5 A schematic diagram of the installation structure of a three-way connector and a carbon dioxide absorption bottle provided in an embodiment of the utility model is shown.

[0026] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0027] Description of reference numerals:

[0028] 100-three-way connector, 110-first connecting branch, 111-inlet pipe, 112-detection tube, 120-second connecting branch, 121-annular baffle, 122-guide rail, 123-card slot, 130-third connecting branch, 200-carbon dioxide absorption bottle, 210-bottle body, 211-first air permeable limiting plate, 212-guide tube, 213-second supporting ring plate, 214-card block, 220-bottle bottom, 221-bottom plate, 222-second air permeable limiting plate, 223-limiting hole, 224-first supporting ring plate, 230-sealing ring. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] The utility model will be further described below in conjunction with the accompanying drawings.

[0035] See also Figure 1 , Figure 2 as well as Figure 5The three-way connector 100 provided by the embodiment of the utility model comprises a first connecting branch 110, a second connecting branch 120 and a third connecting branch 130 fixed to each other, a first end of the first connecting branch 110 is provided with a first sealing connector, and the first end of the first connecting branch 110 can be sealed and connected with the outlet pipe of the breathing circuit of the anesthesia breathing machine through the first sealing connector, the second end of the first connecting branch 110 is connected with the air inlet pipe 111, the first end of the second connecting branch 120 is provided with a second sealing connector, and the first end of the second connecting branch 120 can be sealed and connected with the bottle mouth of the carbon dioxide absorption bottle 200 through the second sealing connector, the second end of the second connecting branch 120 is connected with the first end of the third connecting branch 130, the second end of the third connecting branch 130 is provided with a third sealing connector, and the second end of the third connecting branch 130 can be sealed and connected with the air inlet pipe 111 of the anesthesia breathing machine through the third sealing connector.

[0036] See also Figure 3 , Figure 4 as well as Figure 5 The embodiment of the utility model also provides a carbon dioxide absorption bottle 200, which includes a bottle body 210 and a bottle bottom 220 detachably and sealably installed at the bottom of the bottle body 210, the bottle mouth of the bottle body 210 can be detachably and sealably connected to the second connecting branch pipe 120 of the three-way connector 100, a first air permeable limiting plate 211 is provided near the bottle mouth in the bottle body 210, the material for absorbing carbon dioxide is limitedly placed between the first air permeable limiting plate 211 and the bottle bottom 220, a guide pipe 212 is installed on the first air permeable limiting plate 211, the air inlet pipe 111 of the three-way connector 100 can extend from the second connecting branch pipe 120 into the guide pipe 212 of the carbon dioxide absorption bottle 200 and fit with the inner side wall of the guide pipe 212, the end of the guide pipe 212 close to the bottle bottom 220 can guide the gas entering the guide pipe 212 to flow through the material for absorbing carbon dioxide and flow out from the bottle mouth of the bottle body 210.

[0037] When in use, the first end of the first connecting branch 110 of the three-way connector 100 is sealed and connected to the outlet pipe of the breathing circuit of the anesthesia respirator through the first sealing connector, the second end of the second connecting branch 120 of the three-way connector 100 is sealed and connected to the carbon dioxide absorption tank through the second sealing connector, and the second end of the third connecting branch 130 of the three-way connector 100 is sealed and connected to the air inlet pipe 111 of the anesthesia respirator through the third sealing connector. The gas exhaled by the user of the anesthesia respirator enters the first connecting branch 110 along the outlet pipe of the breathing circuit of the anesthesia respirator, then enters the air inlet pipe 111 along the first connecting branch 110, and then enters the guide pipe 212 of the carbon dioxide absorption bottle 200. The end of the guide pipe 212 close to the bottle bottom 220 guides the gas entering the guide pipe 212 to flow through the material for absorbing carbon dioxide, and flows out from the bottle mouth of the bottle body 210 to the third connecting branch 130, and finally enters the air inlet pipe 111 of the anesthesia respirator along the third connecting branch 130.

[0038] Since the gas exhaled by the user of the anesthesia respirator must flow through the material for absorbing carbon dioxide before finally entering the air inlet pipe 111 of the anesthesia respirator, the carbon dioxide concentration in the gas finally entering the air inlet pipe 111 of the anesthesia respirator is reduced as much as possible.

[0039] The three-way connector 100 provided in the embodiment of the present invention is further described in detail. Figure 1 , Figure 2 as well as Figure 5 The first connecting branch pipe 110 and the third connecting branch pipe 130 are both provided with a detection tube 112, which is used to connect a carbon dioxide detection device, and the detection device can detect the carbon dioxide concentration of the gas in the first connecting branch pipe 110 and the third connecting branch pipe 130. When in use, the detection tubes 112 on the first connecting branch pipe 110 and the third connecting branch pipe 130 are connected to the carbon dioxide detection device, and the detection device detects the carbon dioxide concentration of the gas in the first connecting branch pipe 110 and the third connecting branch pipe 130 in real time, so as to obtain the carbon dioxide absorption effect of the carbon dioxide absorption bottle 200.

[0040] The carbon dioxide absorption bottle 200 provided in the embodiment of the utility model is specifically referred to Figure 3 , Figure 4 as well as Figure 5The bottle bottom 220 includes a bottom plate 221, on which a second air-permeable limiting plate 222 is supported and installed, and a limiting hole 223 is provided on the second air-permeable limiting plate 222. The material for absorbing carbon dioxide is limitedly placed between the first air-permeable limiting plate 211 and the second air-permeable limiting plate 222. The end of the guide tube 212 close to the bottle bottom 220 can pass through the limiting hole 223, and the gas entering the guide tube 212 passes through the second air-permeable limiting plate 222 and flows through the material for absorbing carbon dioxide. The end of the guide tube 212 close to the bottle bottom 220 guides the gas entering the guide tube 212 to the bottom of the second air-permeable limiting plate 222, and passes through the second air-permeable limiting plate 222 to flow through the material for absorbing carbon dioxide, and then passes through the first air-permeable limiting plate 211 and flows out from the bottle mouth of the bottle body 210 to the third connecting branch pipe 130, and finally enters the air inlet pipe 111 of the anesthesia breathing machine along the third connecting branch pipe 130.

[0041] In this example, see Figure 3 , Figure 4 as well as Figure 5 , a first supporting ring plate 224 is provided on the bottom plate 221, and a second air-permeable limiting plate 222 is supported and installed on the first supporting ring plate 224, and the first supporting ring plate 224 can be attached to the inner side wall of the bottle body 210. When it is necessary to place a material for absorbing carbon dioxide in the bottle body 210, the bottle bottom 220 is first removed from the bottle body 210, and then the material for absorbing carbon dioxide is placed on the first air-permeable limiting plate 211 in the bottle body 210, and finally the bottle bottom 220 is installed on the bottle body 210, at this time, the first supporting ring plate 224 can be attached to the inner side wall of the bottle body 210, and the friction between the two prevents the bottle bottom 220 from falling off the bottle body 210, and at the same time, the end of the guide tube 212 close to the bottle bottom 220 can pass through the limiting hole 223. In this embodiment, the bottle body 210 is square, and the bottle body 210 can also be other shapes.

[0042] The three-way connector 100 provided in the embodiment of the present utility model is specifically Figures 1 to 5, an annular baffle 121 is provided on the second connecting branch pipe 120, at least two guide rails 122 are provided at intervals along the circumferential direction on the outer side wall of the second connecting branch pipe 120, a slot 123 is provided on the guide rail 122, a second supporting ring plate 213 is provided at the bottle mouth of the bottle body 210, a first air permeable limit plate 211 is mounted on the second supporting ring plate 213, at least two clamping blocks 214 are provided at intervals along the circumferential direction on the inner side wall of the second supporting ring plate 213, and a sealing ring 230 is provided at the bottle mouth of the bottle body 210. The number of the clamping blocks 214 is equal to and corresponds to the number of the guide rails 122, and each clamping block 214 on the carbon dioxide absorption bottle 200 can slide along each guide rail 122 to be clamped in the slot 123, and at this time, the annular baffle 121 can abut against the sealing ring 230 at the bottle mouth of the carbon dioxide absorption bottle 200. In this embodiment, the bottle mouth of the bottle body 210 is a protruding bottle mouth or a recessed bottle mouth.

[0043] When the carbon dioxide absorption bottle 200 needs to be installed on the second connecting branch pipe 120 of the three-way connector 100, the second connecting branch pipe 120 is inserted into the second supporting ring plate 213, and the carbon dioxide absorption bottle 200 is rotated so that each of the clamping blocks 214 on the carbon dioxide absorption bottle 200 can slide along each of the guide rails 122 to be clamped in the clamping groove 123, and at this time, the annular baffle 121 can abut against the sealing ring 230 at the bottle mouth of the carbon dioxide absorption bottle 200, and the sealing ring 230 and the annular baffle 121 can be pressed against each other. The abutment can strengthen the sealing between the second connecting branch 120 and the carbon dioxide absorption bottle 200; when the carbon dioxide absorption bottle 200 needs to be removed from the second connecting branch 120 of the three-way connector 100, a large force is applied to rotate the carbon dioxide absorption bottle 200 in the opposite direction, so that the connecting blocks 214 on the carbon dioxide absorption bottle 200 can be disengaged from the card slots 123 one by one and slide in the opposite direction along the guide rails 122 until the carbon dioxide absorption bottle 200 is removed from the second connecting branch 120 of the three-way connector 100.

[0044] The embodiment of the utility model also provides a carbon dioxide absorption device, which includes a three-way connector 100 and a carbon dioxide absorption bottle 200 as provided in any of the above embodiments, the bottle mouth of the carbon dioxide absorption bottle 200 is detachably sealedly connected to the second connecting branch pipe 120 of the three-way connector 100, and the air inlet pipe 111 of the three-way connector 100 extends to the end of the guide tube 212 close to the bottle mouth and fits with the inner wall of the guide tube 212. The specific structure of the carbon dioxide absorption bottle 200 refers to the above embodiments. Since the carbon dioxide absorption device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0045] The utility model also provides an anesthesia breathing machine, which has a carbon dioxide absorption device provided by any of the above embodiments. The specific structure of the carbon dioxide absorption device refers to the above embodiments. Since the anesthesia breathing machine adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0047] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.

Claims

1. A carbon dioxide absorption bottle, characterized in that: The carbon dioxide absorption bottle includes a bottle body and a bottle bottom detachably and sealably mounted on the bottom of the bottle body; the bottle mouth of the bottle body can be detachably and sealably connected to the second connecting branch of the three-way connector; a first air-permeable limiting plate is provided in the bottle body near the bottle mouth; a material for absorbing carbon dioxide is limitedly placed between the first air-permeable limiting plate and the bottle bottom; a guide tube is installed on the first air-permeable limiting plate; an air inlet pipe of the three-way connector can extend to the end of the guide tube near the bottle mouth and fit with the inner side wall of the guide tube; the end of the guide tube near the bottle bottom can guide the gas entering the guide tube to flow through the material for absorbing carbon dioxide and flow out from the bottle mouth of the bottle body.

2. The carbon dioxide absorption bottle according to claim 1, characterized in that: The bottle bottom includes a bottom plate, on which a second air-permeable limiting plate is supported and installed, and a limiting hole is provided on the second air-permeable limiting plate. The material for absorbing carbon dioxide is limitedly placed between the first air-permeable limiting plate and the second air-permeable limiting plate, and the end of the guide tube close to the bottle bottom can pass through the limiting hole, and the gas entering the guide tube passes through the second air-permeable limiting plate and flows through the material for absorbing carbon dioxide.

3. The carbon dioxide absorption bottle according to claim 2, characterized in that: The bottom plate is provided with a first supporting ring plate, the second air-permeable limiting plate is supported and installed on the first supporting ring plate, and the first supporting ring plate can be attached to the inner side wall of the bottle body.

4. The carbon dioxide absorption bottle according to claim 1, characterized in that: A second supporting ring plate is provided at the bottle mouth of the bottle body, and the first air-permeable limiting plate is installed on the second supporting ring plate.

5. The carbon dioxide absorption bottle according to claim 4, characterized in that: At least two clamping blocks are arranged at intervals along the circumferential direction on the inner side wall of the second supporting ring plate.

6. The carbon dioxide absorption bottle according to claim 5, characterized in that: A sealing ring is arranged at the bottle mouth of the bottle body.

7. The carbon dioxide absorption bottle according to claim 1, characterized in that: The bottle body is square.

8. A carbon dioxide absorption device, characterized in that: The carbon dioxide absorption device comprises a three-way connector and a carbon dioxide absorption bottle as described in any one of claims 1 to 7, the bottle mouth of the carbon dioxide absorption bottle is detachably and sealedly connected to the second connecting branch of the three-way connector, and the air inlet pipe of the three-way connector extends to the end of the guide tube close to the bottle mouth and fits against the inner wall of the guide tube.

9. An anesthesia ventilator, characterized in that: The anesthesia breathing machine comprises the carbon dioxide absorption device as claimed in claim 8.

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