JP7235483B2 - airway adapter, nasal cannula - Google Patents

Description

The present invention relates to airway adapters, nasal cannulas.

Oxygen masks and oxygen cannulas are known as devices for inhaling high-concentration oxygen from the oral cavity or nasal cavity for treatment to eliminate hypoxic conditions. In addition, in order to monitor the respiratory state of the living body when performing procedures such as surgery and treatment, carbon dioxide concentration measurement sensors (hereinafter referred to as There is an airway adapter to which a "CO ₂ sensor" can be attached.

In addition, as technologies related to the airway adapter, there are a ventilation path into which the subject's respiratory air flows, a nasal cannula that guides the respiratory air from the subject's nostrils to the ventilation path, and a breathing system that allows the subject's breathing from the mouth. A mouth guide that guides air to an airway and an airway case that can be fitted with a temperature sensor that detects temperature changes in respiratory air flowing into the airway is disclosed (see, for example, Patent Document 1).

JP 2014-64881 A

By the way, in the case of a procedure such as transnasal endoscopic surgery in which an instrument is inserted into one of two nostrils, it is desired to simultaneously perform oxygen inhalation and respiratory condition monitoring. In such a case, the conventional airway adapter is provided with two nasal cannulas to be inserted into the nostrils corresponding to the two nostrils. , it was difficult to adapt and use for various procedures.

An object of the present invention is to improve adaptability to procedures in airway adapters and nasal cannulas.

The present invention comprises a nasal exhaled breath collecting part connected to the nostrils of a living body to collect exhaled air in the nasal cavity, an air passage part forming an air passage through which the exhaled air collected by the nasal exhaled air collecting part passes, and an air passage provided in the air passage part. and a gas sensor mounting unit capable of mounting a gas sensor for measuring the concentration of a predetermined gas component contained in the exhaled breath, and the nasal exhaled breath collection unit has a flow state in which the exhaled breath can flow and a closed state in which the flow of the exhaled breath is blocked. present.

In addition, the present invention includes a nostril connecting portion that is connected to the nostrils of a living body and supplies gas to the nostrils, and the nostril connecting portion presents a flow state in which gas can flow and a closed state in which gas flow is blocked.

ADVANTAGE OF THE INVENTION According to this invention, the adaptability to a procedure can be improved.

1 is a perspective view showing a first embodiment of an airway adapter according to the invention; FIG. FIG. 2 is a schematic diagram of the airway adapter shown in FIG. 1 as viewed from the front; FIG. 2 is a vertical cross-sectional view of the internal structure of the airway adapter shown in FIG. 1 as viewed from the right side; 2 is a perspective view showing how the first nasal exhaled breath collection part of the airway adapter shown in FIG. 1 is closed; FIG. FIG. 2 is a schematic diagram showing a state in which the airway adapter shown in FIG. 1 is attached to a human body; Fig. 2 is a perspective view showing a second embodiment of an airway adapter according to the invention; FIG. 11 is a perspective view showing a third embodiment of an airway adapter according to the invention; 8 is a perspective view showing another aspect of the airway adapter shown in FIG. 7; FIG. FIG. 11 is a perspective view showing a fourth embodiment of an airway adapter according to the invention; FIG. 1 shows an embodiment of a nasal cannula according to the present invention, and is a schematic diagram showing a state in which the nasal cannula is attached to a human body.

Hereinafter, embodiments of an airway adapter and a nasal cannula according to the present invention will be described with reference to the drawings. In the present embodiment, the airway adapter is a carbon dioxide concentration measurement sensor (hereinafter referred to as a "gas sensor") that measures the concentration of carbon dioxide contained in exhaled air from the oral cavity and nasal cavity of a human body, which is an example of a living organism, as an example of a gas component. ) collect exhaled breath for monitoring the respiratory status of the human body. In this embodiment, the airway adapter monitors the respiratory state of the living body while supplying oxygen gas to the oral cavity and nasal cavity in order to eliminate hypoxic conditions during procedures such as surgery and treatment. In this embodiment, the nasal cannula is a device that supplies gas (eg, high-concentration oxygen) to the nasal cavity from a tubular nostril connector that is inserted into the nostril for purposes such as treatment to relieve hypoxia.

In the following description and drawings, the direction facing the face of the human body when the airway adapter is attached to the human body, which is an example of a living body, is defined as the front direction, and the surface of the airway adapter attached to the human body as viewed from the front direction. is the front. In the following description and drawings, directions when the airway adapter is attached to the human body are defined as follows when viewed from the front. In the following description and drawings, the left direction toward the face of the human body to which the airway adapter is attached is the -X direction, and the right direction is the +X direction. In the following description and drawings, the +Y direction is the direction toward the inside of the oral cavity of the human body, and the -Y direction is the direction away from the oral cavity of the human body. Further, the upper (parietal) direction of the face of the human body is the +Z direction, and the lower (chin) direction is the -Z direction.

[First Embodiment]
FIG. 1 is a perspective view showing a first embodiment of an airway adapter according to the invention. As shown in FIG. 1 , the airway adapter 1 includes a nasal exhalation collection section 11, a gas sensor mounting section 12, a first gas supply section 131, a second gas supply section 132, and an oral exhalation collection section 20. .

In the airway adapter 1, the nasal exhalation collection part 11 is provided extending in the +Z-axis direction and the +Y-axis direction when viewed from the position where the gas sensor mounting part 12 is provided. The nasal exhaled breath collector 11 is made of a soft and flexible member such as silicone resin, which has a low degree of influence on the human body.

The gas sensor mounting portion 12 is provided below the nasal exhalation collection portion 11 in the −Z axis direction. As indicated by the dashed line in FIG. 1, the gas sensor 30 can be attached to the gas sensor attachment portion 12 from the front in the +Y-axis direction.

The first gas supply portion 131 is provided extending in the −X-axis direction from the position where the gas sensor mounting portion 12 of the airway adapter 1 is provided. The second gas supply portion 132 is provided extending in the +X-axis direction from the position where the gas sensor mounting portion 12 of the airway adapter 1 is provided.

The mouth/exhalation collection part 20 extends in the −Z-axis direction when viewed from the position where the gas sensor mounting part 12 of the airway adapter 1 is provided. When the airway adapter 1 is attached to the face of the human body, the exhaled breath collecting part 20 is positioned in front of the oral cavity, collects exhaled air from the mouth and sends it to the gas sensor attaching part 12 .

FIG. 2 is a schematic diagram of the airway adapter 1 viewed from the front. As shown in FIG. 2 , the nasal exhaled breath collecting part 11 branches from the upper part of the gas sensor mounting part 12 into a first nasal exhaled breath collecting part 111 and a second nasal exhaled breath collecting part 112 .

The first nasal breath collection part 111 and the second nasal breath collection part 112 are each substantially cylindrical flow passages. When the airway adapter 1 is attached to the human body, the distal ends of the first nasal exhaled breath collecting part 111 and the second nasal exhaled breath collecting part 112 are inserted into one of the two nostrils of the human body. The nasal exhalation collection unit 11 collects the exhaled air discharged from the nasal cavity of the human body in the direction of the gas sensor mounting unit 12 . In addition, the nasal breath collection unit 11 may deliver the gas supplied from the first gas supply unit 131 and the second gas supply unit 132 to the nostrils of the human body.

The first nasal exhaled breath collecting part 111 has a first engaged part 113 near the tip on the front side. In addition, the second nasal exhaled breath collecting part 112 has a second locked part 114 near the tip on the front side. The first engaged portion 113 and the second engaged portion 114 are both through holes formed in the first nasal exhalation collecting portion 111 and the second nasal exhalation collecting portion 112 .

The gas sensor mounting portion 12 includes a base portion 121, a gas sensor engaging portion 122, a magnet portion 123, a gas sensor locking portion 124, a gas sensor measurement window 125, a first locking portion 127, and a second locking portion 128. And prepare.

The base portion 121 forms the general shape of the gas sensor mounting portion 12 and supports the nasal exhalation collection portion 11 provided on the upper portion of the gas sensor mounting portion 12 .

The gas sensor engaging portion 122 is provided to engage the gas sensor 30 . The gas sensor engaging portion 122 has a shape that can be engaged with the engaged portion of the gas sensor 30 . Specifically, the gas sensor engaging portion 122 has partition walls on at least the front and both sides thereof to separate the outside from the inside, so that the exhaled breath from the nasal exhalation collection portion 11 and the mouth exhalation collection portion 20 can flow into the internal space. An inflow air passage is formed.

The magnet portion 123 can come into contact with the magnet portion provided on the engaged portion of the gas sensor 30 . The magnet portion 123 is provided, for example, on the front surface of the gas sensor engaging portion 122 . The magnet portion 123 contacts the magnet portion (not shown) of the gas sensor 30 to prevent the gas sensor 30 from falling off.

Gas sensor locking portion 124 has a shape capable of receiving a portion of the housing of gas sensor 30 in order to lock at least a portion of the housing of gas sensor 30 .

The gas sensor measurement window 125 is provided to measure the carbon dioxide concentration of the gas contained in the exhaled air flowing into the air passage formed in the gas sensor engaging portion 122 by the gas sensor 30 attached to the gas sensor mounting portion 12. Therefore, the gas sensor measurement window 125 is formed so that the light from the light emitting portion of the gas sensor 30 and the light to the light receiving portion can pass through. The gas sensor measurement window 125 is, for example, a window ensuring a predetermined light transmittance. The gas sensor measurement windows 125 are located at positions corresponding to the positions of the light emitting portion and the light receiving portion when the gas sensor 30 is attached as shown in FIG. is provided on the partition wall.

FIG. 3 is a longitudinal sectional view showing the internal structure of the airway adapter 1 as seen from the right side. In FIG. 3 , cross sections of the first nasal exhaled air collection part 111 , the gas sensor engaging part 122 , and the oral exhaled air collection part 20 are shown to show the internal structure of the airway adapter 1 . As shown in FIG. 3, the gas sensor engaging portion 122 is formed with an air passage portion 126 . The air passage portion 126 is provided inside the partition wall of the gas sensor engaging portion 122 . The ventilation path part 126 serves as a ventilation path for exhaled air from the nasal exhaled gas collecting part 11 indicated by arrow A1 in FIG. 3 and exhaled gas collected by the oral exhaled gas collecting part 20 indicated by arrow A2 in FIG. The gas sensor 30 attached to the gas sensor engaging portion 122 measures the concentration of CO ₂ in exhaled breath collected in the air passage portion 126 .

The first locking portion 127 is provided on the upper portion of the base portion 121 . The first locking portion 127 is a convex portion that protrudes above the base portion 121 . The first locking portion 127 is formed as a projection having a size corresponding to the dimension of the hole of the first locked portion 113 so as to lock the first locked portion 113 . Also, the first locking portion 127 may be formed in a hook shape to maintain the locked state of the first locked portion 113 to be locked.

The second locking portion 128 is provided on the upper portion of the base portion 121 similarly to the first locking portion 127 . Like the first locking portion 127 , the second locking portion 128 is a convex portion protruding above the base portion 121 and preferably has the same size and shape as the first locking portion 127 .

As shown in FIGS. 1 to 3 , the gas supply section includes a first gas supply section 131 , a second gas supply section 132 , a first tube connection section 133 and a second tube connection section 134 .

The first gas supply unit 131 is a channel for supplying gas to the nasal breath collection unit 11 . The first gas supply unit 131 is provided on the left side of the human face. The second gas supply part 132 is also a channel for supplying gas to the nasal breath collecting part 11, like the first gas supply part 131. As shown in FIG. The second gas supply unit 132 is provided on the right side of the human face.

The first tube connection part 133 is provided at the end of the first gas supply part 131 . The first tube connection part 133 can be connected to a tube (not shown) that supplies gas. The first tube connection portion 133 is an opening that communicates with the first gas supply portion 131 . The gas supplied from the tube connected to the first tube connection part 133 passes through the nasal exhalation collection part 11 from the first gas supply part 131 and is supplied from the nostrils of the human body to the nasal cavity.

The second tube connection portion 134 is provided at the end of the second gas supply portion 132 . The second tube connection portion 134 can be connected to the tube that supplies the gas in the same manner as the first tube connection portion 133 . The second tube connection portion 134 is an opening that communicates with the second gas supply portion 132 . The gas supplied from the tube connected to the second tube connection portion 134 passes through the nasal exhalation collection portion 11 from the second gas supply portion 132 and is supplied from the nostrils of the human body to the nasal cavity.

FIG. 4 is a perspective view showing how the first nasal exhalation collecting part 111 of the airway adapter 1 is closed. In FIG. 4, by bending the first nasal exhaled breath collecting part 111 of the nasal exhaled breath collecting part 11 in the -Y-axis direction and locking the first locked part 113 to the first locking part 127, the first It shows how the nasal breath collector 111 is closed.

In the airway adapter 1, the nasal exhaled breath collecting portion 11 is made of flexible material as described above. In the airway adapter 1, the first engaged portion 113 and the second engaged portion 114 are provided on the first nasal exhaled breath collecting portion 111 and the second nasal exhaled breath collecting portion 112, respectively. Further, the airway adapter 1 is provided with the first locking portion 127 and the second locking portion 128 on the base portion 121 of the gas sensor mounting portion 12 on the front side as described above. In the airway adapter 1, the first locked portion 113 is locked to the first locked portion 127, and the second locked portion 114 is locked to the second locked portion 128, so that the airway adapter 1 is flexible and flexible. The first exhaled nasal air collecting part 111 and the second exhaled nasal air collecting part 112 formed of flexible members bend. As a result, the state of the passages of the first nasal breath collection unit 111 and the second nasal breath collection unit 112 changes from a circulation state in which the passages are collapsed, allowing the passage of exhaled breath, to a closed state in which the passage of the exhaled breath is obstructed. change to

As described above, in the airway adapter 1, the first locked portion 113 and the second locked portion 114 function as a closed state generating portion that allows the first nasal exhaled breath collecting portion 111 to be closed. Also, in the airway adapter 1, the first locking portion 127 and the second locking portion 128 function as a closed state generating portion that enables the second nasal exhalation collecting portion 112 to be closed. Then, in the airway adapter 1, the first nasal exhaled breath collection part 111 and the second nasal exhaled breath collection part 112 of the nasal exhaled breath collection part 11 exhibit a flow state in which exhaled air can flow and a closed state in which the flow of exhaled air is blocked. can be done.

[Usage example of airway adapter]
Next, a usage example of the airway adapter 1 described above will be described.

FIG. 5 is a schematic diagram showing a state in which the airway adapter 1 is attached to the human body H. As shown in FIG. As shown in FIG. 5, when the airway adapter 1 is attached to the human body H, the first locked portion 113 is used when inserting an instrument for transnasal endoscopic surgery from one nostril NH1. By engaging with the first engaging portion 127, the first nasal exhalation collecting portion 111 can be closed.

As described above, according to the airway adapter 1, it is possible to prevent the nasal exhalation collection part 11 from interfering with the procedure when inserting the instrument into the nostril NH1, thereby improving adaptability to the procedure.

Further, according to the airway adapter 1 that can be used in this way, the first nasal exhaled breath collection part 111 can be blocked even in a situation where liquid such as nasal mucus or medicine drips from the nostril NH1. Therefore, it is possible to prevent the gas sensor 30 from malfunctioning due to liquid entering the air passage portion 126 .

It should be noted that the positions at which the first locked portion 113 and the second locked portion 114 are provided in the nasal exhalation collecting portion 11 are not limited to the positions described above. The first locked part 113 and the second locked part 114 lock the exhaled nasal air collecting part 11 having flexibility and maintain the bent state, thereby closing the exhaled nasal air collecting part 11 . I wish I could.

Moreover, in the airway adapter 1, the gas supply section is not limited to the one divided into the left and right toward the face of the human body like the first gas supply section 131 and the second gas supply section 132 described above. For example, the gas supply may supply gas from the tubes connected to one tube connection.

[Second embodiment]
Next, a second embodiment of the airway adapter according to the invention will be described. In this embodiment, only differences from the airway adapter 1 according to the previously described embodiment will be described.

FIG. 6 is a perspective view showing a second embodiment of the airway adapter according to the invention. As shown in FIG. 6, the airway adapter 1A according to this embodiment differs from the nasal exhalation collection part 11 of the airway adapter 1 described above in the configuration of the nasal exhalation collection part 11A and the gas sensor mounting part 12A.

The nasal exhalation collecting part 11A is formed such that the first nasal exhalation collecting part 111A and the second nasal exhalation collecting part 112A are detachable from the airway adapter 1 . FIG. 6 shows a state in which only the second nasal exhalation collection part 112A is removed from the airway adapter 1. As shown in FIG.

The first nasal exhaled breath collection part 111A and the second nasal exhaled breath collection part 112A are attached to the airway adapter 1A by being attached to the tubular attachment part 129 provided on the base part 121A of the gas sensor attachment part 12A.

A cover 115 is attached as a closed state generator to the covering part 129 from which the first nasal breath collection part 111A and the second nasal breath collection part 112A are removed, so as to block the air passage of the nasal breath collection part. can.

As described above, in the airway adapter 1A, by removing the first nasal exhaled breath collecting portion 111A or the second nasal exhaled breath collecting portion 112B and closing it with the lid 115, the nasal exhaled breath collecting portion 11A can be inserted into the other nostril. Prevent from interfering with the procedure such as. Therefore, according to the airway adapter 1A, adaptability to procedures can be improved.

[Third embodiment]
Next, a third embodiment of the airway adapter according to the invention will be described. In this embodiment, only differences from the airway adapter 1 according to the previously described embodiment will be described.

FIG. 7 is a perspective view showing a third embodiment of the airway adapter according to the invention. As shown in FIG. 7, in the airway adapter 1B according to the present embodiment, the configurations of the nasal exhalation collection portion 11B and the gas sensor mounting portion 12B are different from the nasal exhalation collection portion 11 and the gas sensor mounting portion 12 of the airway adapter 1 described above. do.

The nasal exhaled breath collector 11B is different from the nasal exhaled breath collector 11 having the first nasal breath collector 111 and the second nasal breath collector 112, and has one tubular portion that can be inserted into the nostril. The nasal breath collector 11B is configured to be rotatable about the Z-axis direction with respect to the base portion 121B of the gas sensor mounting portion 12B. Therefore, as shown in FIG. 7, the nasal exhaled breath collecting part 11B can be biased to the left toward the human body so that it can be easily inserted into the right nostril of the human body.

FIG. 8 is a perspective view showing another aspect of the airway adapter 1B. By rotating the nasal breath collection part 11B with respect to the base part 121B, it can be biased rightward toward the human body so that it can be easily inserted into the left nostril of the human body as shown in FIG.

7 and 8 show an example in which the entire nasal breath collection unit 11B including the gas supply unit rotates with respect to the base unit 121B, but the present invention is not limited to this. The nasal exhaled breath collection part 11B may be configured such that only the connection part between the cylindrical part inserted into the nostril and the ventilation path part 126 rotates, for example, and the gas supply part does not rotate.

As described above, in the airway adapter 1B, by biasing one nasal exhaled breath collecting portion 11B toward one side of the nostril, the nasal exhaled breath collecting portion 11B interferes with a procedure such as inserting an instrument into the other nostril. and improve adaptability to the procedure.

[Fourth embodiment]
Next, a fourth embodiment of the airway adapter according to the invention will be described. In this embodiment, only differences from the airway adapter 1 according to the previously described embodiment will be described.

FIG. 9 is a perspective view showing a fourth embodiment of the airway adapter according to the invention. As shown in FIG. 9, the airway adapter 1C according to this embodiment differs from the nasal exhalation collection section 11 of the airway adapter 1 described above in the configuration of the nasal exhalation collection section 11C.

Unlike the nasal exhaled breath collector 11, which includes the first nasal exhaled breath collector 111 and the second nasal exhaled breath collector 112, the nasal exhaled breath collector 11C has a tubular portion that can be inserted into a nostril. When the airway adapter 1C is attached to the human body, the nasal exhaled breath collection part 11C is inserted into the nostril on the side of the two nostrils on which the procedure is not performed. At this time, the exhaled nasal air collecting unit 11C may have a longer tube length than the exhaled nasal air collecting unit 11 and the like.

As described above, in the airway adapter 1C, by inserting one nasal exhaled breath collection part 11C into one of the nostrils, the nasal exhaled breath collection part 11C interferes with a procedure such as inserting an instrument into the other nostril. It can prevent it and improve adaptability to the procedure.

[Fifth Embodiment]
Next, an embodiment of a nasal cannula according to the present invention will be described as a fifth embodiment. In this embodiment, only differences from the airway adapter 1 according to the previously described embodiment will be described.

FIG. 10 shows an embodiment of a nasal cannula 1D according to the present invention, and is a schematic diagram showing a state in which the nasal cannula 1D is attached to a human body H. As shown in FIG. As shown in FIG. 10, the nasal cannula 1D includes a first nostril connecting portion 111D, a second nostril connecting portion 112D, a first locked portion 113, a second locked portion 114, a base portion 121, and a first locking portion. A portion 127 , a second locking portion 128 , a first gas supply portion 131 and a second gas supply portion 132 are provided.

The first nostril connecting portion 111D is connected to the left nostril NH1 of the human body H and supplies gas to the nasal cavity. The second nostril connecting portion 112D is connected to the nostril NH2 on the right side of the human body H and supplies gas to the nasal cavity. The configuration of the first nostril connecting portion 111D is the same as that of the first exhaled breath collecting portion 111 described above, including the provision of the first locked portion 113 that can be locked to the first locking portion 127 . In addition, the configuration of the second nostril connecting portion 112D is the same as that of the second exhaled breath collecting portion 112 described above, including the provision of the second locked portion 114 that can be locked to the second locking portion 128 . Base portion 121 forms the general shape of nasal cannula 1D. The base portion 121 supports a nostril connection portion having a first nostril connection portion 111D and a second nostril connection portion 112D and a gas supply portion having a first gas supply portion 131 and a second gas supply portion 132 . The first locking portion 127 and the second locking portion 128 are convex portions protruding above the base portion 121, like the first locking portion 127 and the second locking portion 128 of the airway adapter 1 described above. .

The first gas supply section 131 supplies gas to the first nostril connection section 111D. In addition, the second gas supply section 132 supplies gas to the second nostril connection section 112D.

As shown in FIG. 10, the nasal cannula 1D is used when an instrument for transnasal endoscopic surgery is inserted from one nostril NH1 when attached to the human body H, similar to the airway adapter 1. , the first locking portion 127 can be locked to the first locked portion 113 . Therefore, according to the nasal cannula 1D, the first nostril connecting portion 111D can be closed in the same manner as the airway adapter 1 having the first locking portion 127 and the first locked portion 113. FIG. Further, when the nasal cannula 1D is attached to the human body H, similarly to the airway adapter 1, when an instrument for transnasal endoscopic surgery is inserted from the other nostril NH2, the second locking portion 128 can be locked to the second locked portion 114 . That is, in the nasal cannula 1D, the first nostril connecting portion 111D and the first locking portion 127, and the second nostril connecting portion 112D and the second locking portion 128 are formed of flexible members. It functions as a blockage state generating part that bends the part to block the nasal cavity connecting part. Therefore, according to the nasal cannula 1D, the second nostril connecting portion 112D can be closed in the same manner as the airway adapter 1 having the second locking portion 128 and the second locked portion 114. FIG.

As described above, the nasal cannula 1D prevents the first nostril connecting portion 111D or the second nostril connecting portion 112D from interfering with the procedure when inserting the instrument into the nostril NH1 or the nostril NH2. can improve the adaptability of

1 Airway Adapter 1D Nasal Cannula 11 Nasal Exhalation Collection Part 12 Gas Sensor Mounting Part 20 Mouth Exhalation Collection Part 30 Gas Sensor 111 First Nose Exhalation Collection Part 111D First Nostril Connection Part 112 Second Nose Exhalation Collection Part 112D Second Nostril Connection Part 113 First locked portion 114 Second locked portion 115 Lid 121 Base portion 122 Gas sensor engaging portion 123 Magnet portion 124 Gas sensor locking portion 125 Gas sensor measurement window 126 Air passage portion 127 First locking portion 128 Second locking portion 129 Attachment part 131 First gas supply part 132 Second gas supply part 133 First tube connection part 134 Second tube connection part

Claims (7)

a nasal exhalation collection unit that is connected to the nostrils of the living body and collects exhaled air from the nasal cavity;
an airway portion forming an airway through which the exhaled breath collected by the nasal exhaled breath collection portion passes;
a gas sensor mounting portion provided in the air passage portion and capable of mounting a gas sensor for measuring the concentration of a predetermined gas component contained in exhaled air;
an obstruction state generator that bends the exhaled nasal air collecting part to occlude the exhaled nasal air collecting part;
with
The nasal exhaled breath collection part is formed of a flexible member, and presents a circulation state in which the exhaled air can circulate and a closed state in which the exhaled breath is bent to obstruct the circulation of the exhaled breath ,
The closed state generation unit,
a hole provided in the nasal breath collector;
a convex portion provided on the gas sensor mounting portion and engaged with the hole to maintain the bent state of the nasal exhalation collection portion and to bring the nasal exhalation collection portion into the closed state;
airway adapter. The nasal exhalation collection unit comprises:
a first nasal exhaled breath collecting part connected to one nostril of the living body and forming an airway for the exhaled air of the nasal cavity;
a second nasal exhaled breath collection unit connected to the other nostril of the living body and forming an exhaled air passage of the nasal cavity;
comprising
The airway adapter of Claim 1. an oral breath collection unit connected to the oral cavity of the living body and collecting the breath from the oral cavity;
with
wherein the air passage collects exhaled breath from the nasal exhalation collection portion and the oral exhalation collection portion;
3. An airway adapter according to claim 1 or 2 . a gas supply unit that supplies gas to the nasal breath collection unit;
comprising
4. An airway adapter according to any one of claims 1-3. the air passage portion includes a partition wall that separates the outside and the inside of the air passage portion;
with
The gas sensor mounting part is
provided on the partition wall of the air passage,
A gas sensor measurement window having a predetermined light transmittance is provided on two opposing surfaces of the partition wall,
5. An airway adapter according to any one of claims 1-4. a nostril connector that is connected to the nostrils of a living organism and supplies gas to the nostrils;
a closed state generator that bends the nostril connecting portion to close the nostril connecting portion;
with
The nostril connecting portion is formed of a flexible member, and exhibits a flow state in which the gas can flow and a closed state in which the gas is bent and obstructs the flow of the gas ,
The closed state generation unit,
a hole provided in the nostril connecting portion;
a convex portion projecting above the base portion supporting the nostril connecting portion and engaging with the hole to maintain the bent state of the nostril connecting portion to bring the nostril connecting portion into the closed state;
having
nasal cannula. The nostril connecting part is
a first nostril connecting portion connected to one nostril of the living body;
a second nostril connecting portion connected to the other nostril of the living body;
comprising
7. Nasal cannula according to claim 6 .

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