CN220110220U

CN220110220U - Patient interface device

Info

Publication number: CN220110220U
Application number: CN202321086528.6U
Authority: CN
Inventors: 林立宝; 周明钊; 庄志
Original assignee: BMC Tianjin Medical Co Ltd
Current assignee: BMC Tianjin Medical Co Ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2023-12-01
Anticipated expiration: 2033-05-06

Abstract

The utility model relates to a patient interface device, relates to the technical field of ventilation treatment, and is used for automatically blocking a gas path when a fire disaster occurs, so as to achieve the purpose of preventing the fire disaster from continuing to burn and spread. The patient interface device of the present utility model is configured to deliver ventilation gas to a patient, and the patient interface device is provided with a blocking device configured to allow the patient interface device to be turned on when the blocking device is in a first state, and to block the patient interface device from being turned on when the blocking device is switched from the first state to a second state.

Description

Patient interface device

Technical Field

The present utility model relates to the field of ventilation therapy, and in particular to a patient interface device.

Background

The gases provided by the noninvasive respiratory support apparatus (gas source) may be delivered to the airway of the patient via a patient interface device, such as by providing oxygen to the patient, etc., either invasively or non-invasively. Currently, existing oxygen generating devices are configured to continuously deliver oxygen at a determined rate according to the needs of the patient and do not cause the delivery of oxygen to cease even if the patient removes the patient interface device. In this case, an oxygen-rich environment is easily established around the patient, and if an open fire (e.g., smoking, etc.) is encountered, a fire is certainly promoted, and a fire is extremely likely to be initiated. Especially in the case of a history of smoking, which may have a smoking behaviour, the risk of catastrophic fire is higher if the patient interface device that is delivering oxygen is removed and left in the vicinity of the body. While existing patient interface devices lack an effective blocking mechanism and therefore present a safety risk.

Disclosure of Invention

The utility model provides a patient interface device which can automatically block an air passage when a fire disaster occurs, thereby achieving the aims of preventing flames from flowing back to oxygen generating equipment to cause burning or explosion and preventing the fire from continuing to burn and spread.

The utility model provides a patient interface device, which is used for a vent pipe or a connecting pipe for conveying ventilation gas to a patient, wherein a blocking device is arranged on the vent pipe or the connecting pipe, and comprises a shell with a ventilation channel;

the blocking device is configured to conduct gas between the ventilation channel and the ventilation pipe or the connecting pipe when the blocking device is in a first state, and to block the gas between the ventilation channel and the ventilation pipe or the connecting pipe when the blocking device is switched from the first state to a second state.

In one embodiment, the patient interface device includes a nasal oxygen cannula device including a nasal oxygen cannula for wearing on a patient's face, the airway tube being connected to the nasal oxygen cannula and a source of air, respectively.

In one embodiment, the patient interface device includes a respiratory mask including a mask body for wearing on a patient's face, the ventilation tube being connected to the mask body and a source of gas, respectively.

In one embodiment, the housing is assembled with or integrally formed with the vent tube.

In one embodiment, the housing is assembled with or integrally formed with the connection tube.

In one embodiment, the shell is arranged at the middle position of the vent pipe, so that two ends of the shell are respectively connected with the vent pipe; or alternatively

The shell is arranged at the end part of the ventilation pipe, so that one end of the shell is connected with the end part of the ventilation pipe, and the other end of the shell is connected with the nasal oxygen pipe or the air source.

In one embodiment, the housing is disposed at a middle position of the connection pipe such that both ends of the housing are respectively connected to the connection pipe; or alternatively

The shell is arranged at the end part of the connecting pipe, so that one end of the shell is connected with the end part of the connecting pipe, and the other end of the shell is connected with the mask body or the air source.

In one embodiment, the blocking device further comprises a blocking member disposed in the ventilation circuit,

wherein when the blocking device is in a first state, the blocking member is in a first position and opens the ventilation circuit, thereby rendering the patient interface device conductive;

when the blocking device is switched from the first state to the second state, the blocking member is in the second position and closes the ventilation circuit, thereby blocking the patient interface device.

In one embodiment, the blocking device further comprises a releasable element disposed in the ventilation circuit, the releasable element being connected to the blocking member;

wherein the releasable element is locked when the blocking member is in the first position;

when the releasable element is released, the blocking member is shifted from the first position to the second position, whereby the blocking device is switched from the first state to the second state.

In one embodiment, the blocking device further comprises a trigger element coupled to the blocking member, the trigger element for maintaining the blocking member in the first state and causing the releasable element to be locked;

wherein when the trigger element is triggered, the connection of the trigger element to the blocking member fails such that the releasable element is released and the blocking member is transformed from a first position to a second position.

In one embodiment, a shoulder with a reduced inner diameter is arranged in the ventilation channel, wherein when the blocking piece is positioned at the first position, the sealing end of the blocking piece is far away from the shoulder, so that the ventilation channel is opened; when the blocking piece is positioned at the second position, the sealing end of the blocking piece is connected with the shoulder in a sealing way so as to block the ventilation path.

In one embodiment, the shoulder has a mating bevel, the sealing end of the blocking member is embedded with a first sealing member, and when the blocking member is in the second position, the first sealing member is in sealing fit connection with the mating bevel to block the ventilation path.

In one embodiment, the sealing end of the blocking member is further provided with a connection flange, one end of the releasable element being in abutment with the connection flange, the other end of the releasable element being in abutment with the inner wall of the housing.

In one embodiment, the trigger element is configured as a support body provided on the inner wall of the housing, the support body being located close to the end of the housing, the support body being connected to the trigger end of the blocking member to lock the releasable element between the support body and the sealing end of the blocking member;

the support body is configured to disengage from the trigger end of the blocking member when deformed such that the blocking member is shiftable from a first position to a second position.

In one embodiment, the support body comprises at least two support claws forming an angle with the axis of the housing or a truncated cone structure tapering along the axial diameter of the housing.

In one embodiment, the triggering end of the blocking member is configured as a tapered end which passes through a gap between at least two of the support claws and is engaged with an end of the support claw, or

The conical end penetrates through the through hole in the round platform structure and is clamped and connected with the end part of the round platform structure.

In one embodiment, the support body is adhesively connected to the triggering end of the blocking member.

In one embodiment, the releasable element is configured as a spring, which is made of a metallic material.

In one embodiment, a guide structure is also provided on the outer wall of the blocking member, between the trigger element and the releasable element, for cooperation with the inner surface of the housing to allow the blocking member to be moved from the first position to the second position.

In one embodiment, the housing comprises a first housing and a second housing, wherein the first housing and the second housing are hollow structures, and after the first housing and the second housing are connected, the hollow structures define the ventilation channel;

a second sealing piece is arranged between the first shell and the second shell so as to connect the first shell and the second shell in a sealing way.

In one embodiment, one of the inner wall of the first shell and the outer wall of the second shell is provided with a buckle, and the other is provided with a groove matched with the buckle;

the buckles are arranged at least two at intervals along the circumferential direction of the shell or extend in the whole circumferential direction of the shell;

the grooves are arranged at intervals along the circumferential direction of the shell, or the grooves extend in the whole circumferential direction of the shell.

In one embodiment, one of the first housing and the second housing is provided with a connector for connection to a patient interface device and the other is provided with an interface for connection to a gas source.

In one embodiment, the connector is a threaded pipe connector, a snap connector or a quick-connect connector.

In one embodiment, one of the first housing and the second housing has a female head attached thereto for connection to a patient interface device, and the other has a male head attached thereto for connection to a gas source.

In one embodiment, the number of the blocking devices is two, the two blocking devices are symmetrically arranged about the connection part of the two blocking devices, and one ends of the two blocking devices, which are far away from each other, are respectively connected with a male head or a female head.

Compared with the prior art, the utility model has the advantages that when the blocking device is switched from the first state to the second state, the blocking device blocks the conduction of the patient interface device, so that when unexpected events such as fire disaster and the like occur, the gas path between the patient interface device and the gas source of the blocking device is blocked, thereby blocking the combustion supporting of oxygen, avoiding the spread of fire to the gas source and improving the use safety.

Drawings

The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.

FIG. 1 is a schematic perspective view of a patient interface device according to example 1 of the present utility model;

fig. 2 is a schematic perspective view of a blocking device in embodiment 1 of the present utility model;

fig. 3 is a perspective sectional view of the blocking device in embodiment 1 of the present utility model;

fig. 4 is a perspective sectional view of the blocking device in embodiment 2 of the present utility model;

fig. 5 is a perspective sectional view of the blocking device in embodiment 3 of the present utility model;

fig. 6 is a perspective sectional view of the blocking device in embodiment 4 of the present utility model.

Description of the drawings:

1. a nasal oxygen cannula device;

11. a nasal oxygen cannula; 12. a vent pipe; 13. a pipeline fixing clamp; 14. nasal obstruction; 15. nasal oxygen cannula headgear;

2. a blocking device;

21. a housing; 211. a first housing; 212. a second housing; 213. an air passage; 214. a shoulder; 215. matching with the inclined plane; 216. a second seal; 217. a buckle; 218. a groove; 219. a joint; 210. an interface; 2311. a connecting step;

22. a blocking member; 221. sealing the end; 222. a trigger end; 223. a first seal; 224. a guide structure; 225. a connecting flange;

23. a releasable element;

24. a trigger element; 241. a support body;

25. a hook;

3. a female head; 4. a male.

Detailed Description

The utility model will be further described with reference to the accompanying drawings.

The present utility model provides a patient interface device that is coupled to a source of ventilation gas (e.g., oxygen) and to a patient, respectively, so that the ventilation gas (e.g., oxygen) of the source of ventilation gas can be provided to the patient. Wherein the patient interface device is provided with a blocking device 2, the blocking device 2 comprising a housing 21 with an air vent path 213, the patient interface device comprising a vent tube 12 or a connection tube for delivering oxygen to a patient, the housing 21 being provided on the vent tube 12 or the connection tube. When the blocking device 2 is configured such that in its first state, the ventilation circuit 213 is in gaseous communication with the ventilation tube 12 or the connection tube of the patient interface device, the ventilation gas is able to flow to the patient via the ventilation tube 12 or the connection tube of the patient interface device; further, when the blocking device 2 is switched from the first state to the second state, the ventilation path 213 is blocked from communicating with the ventilation tube 12 or the connection tube of the patient interface device, thereby blocking the gas communication path between the patient interface device and the patient. Therefore, when an accident such as a fire occurs, the state of the blocking device 2 is switched, and the gas flow path of the patient interface device can be blocked, thereby preventing the burnt fluid from spreading in the direction of the gas source.

Example 1

As shown in fig. 1-3, the patient interface device comprises a nasal oxygen cannula device 1, the nasal oxygen cannula device 1 comprising a nasal oxygen cannula 11 for wearing on the patient's face and a ventilation tube 12 connected to the nasal oxygen cannula 11 and the source of gas, respectively, the blocking device 2 being arranged on the ventilation tube 12.

As shown in fig. 1, the nasal oxygen cannula 11 includes a nasal oxygen cannula head strap 15 for being fixed to the head of a patient and nasal prongs 14 connected to the ventilation tube 12, the nasal prongs 14 being respectively inserted into both nostrils of the patient, the nasal prongs 14 being in communication with the ventilation tube 12 so that ventilation gas can be inputted to the nose of the patient through the nasal prongs 14. The two ends of the nasal oxygen cannula head band 15 are respectively connected to the two ends of the nasal obstruction 14 to fix the nasal obstruction 14 on the face of the patient to realize stable input.

In some embodiments, the blocking device 2 and the vent tube 12 are of a split type construction, and the two are connected by assembly. In other embodiments, the blocking device 2 is integrally formed with the vent tube 12.

Alternatively, the blocking device 2 is disposed at a middle position of the ventilation pipe 12 such that both ends of the blocking device 2 are respectively connected to the ventilation pipe 12.

Further alternatively, the blocking device 2 is arranged at the end position of the ventilation tube 12 such that one end of the blocking device 2 is connected to the end of the ventilation tube 12 and the other end of the blocking device 2 is connected to the nasal oxygen tube 11 or the air source. In the embodiment shown in fig. 1, the blocking device 2 is connected at one end to the end of the ventilation tube 12 and at the other end to a gas source (not shown).

Specifically, as shown in fig. 2 and 3, the blocking device 2 includes a housing 21 having an air passage 213 and a blocking member 22 provided in the air passage 213. Wherein, when the blocking device 2 is in the first state, the blocking member 22 is in the first position (as shown in fig. 2) and opens the ventilation channel 213, thereby allowing gas communication between the ventilation channel 213 and the ventilation tube 12 of the patient interface device. When the blocking device 2 is switched from the first state to the second state, the blocking member 22 is located at the second position (please refer to the position of the blocking member 22 in fig. 5 and 6), and the ventilation channel 213 is closed, the gas communication between the ventilation channel 213 and the ventilation tube 12 of the patient interface device is blocked, and the gas communication towards the patient interface device is blocked.

As shown in fig. 2 and 3, the blocking member 22 is configured in a generally fusiform configuration with a trigger end 222 at the other end for maintaining it in the first position; and at its other end is a sealed end 221 for closing the vent path 213. As shown in fig. 3, the blocking member 22 is in the first position, and the sealing end 221 thereof is not in sealing connection with the air vent path 213, so that the air vent path 213 is in an open state (first state) at this time. On the contrary, when the sealing end 221 of the blocking member 22 is in sealing connection with the air vent path 213 (please refer to fig. 5 and 6), the air vent path 213 is blocked by the sealing end 221 and is in the closed state (second state).

The blocking device 2 further comprises a releasable element 23 arranged in the ventilation channel 213, the releasable element 23 being connected to the blocking member 22. Wherein the releasable element 23 is configured as a spring, which is made of a metallic material. Therefore, when a fire breaks out, the spring made of metal material does not fail at high temperature.

When the blocking member 22 is in the first position, the releasable element 23 is locked (i.e. the spring is compressed); when the releasable element 23 is released (i.e. when the spring is extended), the blocking member 22 is shifted from the first position to the second position, whereby the blocking device 2 is switched from the first state to the second state.

The blocking device 2 further comprises a triggering element 24, the triggering element 24 being connected to the blocking member 22, the triggering element 24 being adapted to hold the blocking member 22 in the first state and to cause the releasable element 23 to be locked; wherein when the trigger element 24 is triggered, the connection of the trigger element 24 to the blocking member 22 is disabled, such that the releasable element 23 is released and the blocking member 22 is transformed from the first position to the second position.

As shown in fig. 3, the ventilation channel 213 is provided with a shoulder 214 having a reduced inner diameter, wherein when the blocking member 22 is in the first position, the sealing end 221 of the blocking member 22 is away from the shoulder 214, so that the ventilation channel 213 is opened; when the blocking member 22 is in the second position, the sealing end 221 of the blocking member 22 is sealingly connected to the shoulder 214 to block the vent path 213.

Further, the shoulder 214 has a mating slope 215, the sealing end 221 of the blocking member 22 is embedded with a first sealing member 223, and when the blocking member 22 is located at the second position, the first sealing member 223 is connected with the mating slope 215 in a sealing and mating manner so as to block the ventilation channel 213. The first seal 223 may be a seal ring (e.g., an o-ring, v-ring, rectangular seal ring, etc.).

Thus, when the patient end encounters an open flame, the flame burns along the vent pipe 12 toward the air source, as the oxygen inside the nasal oxygen cannula 11 and the vent pipe 12 will assist in combustion. When the flame burns to the position of the trigger element 24, the trigger element 24 is deformed by heat and becomes soft, the connection between the trigger element 24 and the blocking piece 22 fails, so that the releasable element 23 is released, the blocking piece 22 is pushed to the sealing end 221 of the blocking piece under the pushing action of the releasable element 23 to be inserted into the shoulder 214, the first sealing piece 223 on the blocking piece can ensure that the sealing end 221 of the blocking piece 22 is in sealing connection with the matching inclined surface 215 of the shoulder 214, and under the pushing action of the releasable element 23, the sealing end 221 of the blocking piece 22 is in tighter matching with the shoulder 214, and the ventilation channel 213 is blocked by the sealing end 221 of the blocking piece 22, so that the whole gas circulation path is cut off, and the aim of preventing the flame from spreading to a gas source is fulfilled.

Therefore, the blocking device 2 of the present utility model only requires the housing 21 and the blocking member 22, the releasable element 23 and the triggering element 24 inside it to perform the blocking function, so that the parts inside the housing 21 are fewer, making the assembly method simpler. Furthermore, the design concept of the blocking device 2 of the utility model is that the linkage between the triggering element 24 and the releasable element 23, i.e. when the triggering element 24 is not triggered, locks the releasable element 23 by the blocking member 22; when the trigger element 24 is triggered, its connection with the blocking member 22 fails, whereby the releasable element is released, thereby causing the blocking member 22 to perform its blocking function.

To achieve locking of the releasable element 23, the sealing end 221 of the blocking member 22 is further provided with a connecting flange 225, as shown in fig. 3, one of the ends of the releasable element 23 being in abutment with the connecting flange 225; as shown in fig. 3, a connection step 2311 is further provided on the inner wall of the housing 21, and the other end of the releasable element 23 abuts against the connection step 2311. Releasable element 23 may be locked between sealing end 221 of blocking member 22 and attachment step 2311.

Further, the triggering element 24 is configured as a supporting body 241 provided on the inner wall of the housing 21, the supporting body 241 being located near the end of the housing 21, the supporting body 241 being connected to the triggering end 222 of the blocking member 22 to lock the releasable element 23 between the supporting body 241 and the sealing end 221 of the blocking member 22, the supporting body 241 being configured to be mutually separated from the triggering end 222 of the blocking member 22 when it is deformed, so that the blocking member 22 can be shifted from the first position to the second position.

As shown in fig. 3, the support body 241 includes at least two support claws that form an angle with the axis of the housing 21. The trigger end 222 of the blocking member 22 is configured as a tapered end with a gap between the support jaws that can pass through the gap between at least two of the support jaws and be engaged with the ends of the support jaws. The blocking member 22 is maintained in the first position by the connection between the trigger end 222 of the blocking member 22 and the support pawl; at the same time, releasable element 23 is compressed and locked between sealing end 221 of blocking member 22 and attachment step 2311.

Alternatively, it is contemplated that the support 241 may be adhesively attached to the trigger end 222 of the blocking member 22. Since the supporting claw deforms at a high temperature (400 ℃ and above), when a fire occurs, the supporting claw deforms under the influence of the high temperature, and the engagement or adhesion between the supporting claw and the blocking member 22 is disabled, so that the supporting claw is triggered, and the blocking member 22 is not connected with the supporting claw, so that the blocking member 22 can move to the second position under the estimation of the releasable element 23.

It is conceivable that the support body 241 can also be configured as a truncated cone with a tapering diameter in the axial direction of the housing 21, the triggering end 222 of the blocking element 22 being configured as a conical end which passes through a through-hole in the truncated cone and is connected in a snap-fit manner to the end of the truncated cone. The maximum diameter of the tapered end is slightly larger than the minimum diameter of the truncated cone structure, and the blocking piece 22 and the housing 21 are made of plastic materials, so that the triggering end 222 of the blocking piece 22 or the truncated cone structure can slightly deform, and the triggering end 222 of the blocking piece 22 can penetrate through a through hole in the truncated cone structure and is clamped with the end of the truncated cone structure.

The design of the support body 241 is based on the design of the structure with a gradually decreasing dimension in the axial direction of the housing 21 towards the nasal oxygen cannula 11, so that the first burning part is a smaller dimension part, thereby being easier to deform and being more quickly connected with the blocking member 22 to fail during burning, so that the blocking member 22 can be quickly moved from the first position to the second position, and the triggering is quicker.

It will therefore be appreciated that support 241 may also be of other forms of construction which are not exhaustive herein.

Further, since the blocking member 22 is moved from the first position to the second position, in order to ensure that the sealing end 221 thereof can be smoothly taken out of the communication hole in the shoulder 214, a guide structure 224 is further provided on the outer wall of the blocking member 22, the guide structure 224 being located between the trigger element 24 and the releasable element 23 for cooperation with the inner surface of the housing 21 so that the blocking member 22 can be moved from the first position to the second position.

More specifically, the guide structure 224 may be a rib, or the like guide member extending in the axial direction of the housing 21, and the number thereof may be 3 to 6, or more, or less, or the like. Correspondingly, guide grooves may also be provided on the inner wall of the housing 21, and guide structures 224 may be provided in the corresponding guide grooves to ensure that the blocking member 22 moves along the desired path from the first position to the second position.

The housing 21 may be of unitary construction or of split construction. In the embodiment shown in fig. 2 and 3, the housing 21 is of a split type construction. Specifically, the housing 21 includes a first housing 211 and a second housing 212, and the first housing 211 and the second housing 212 are hollow structures, and after the first housing 211 and the second housing 212 are connected, the hollow structures define an air vent path 213.

As shown in fig. 3, a second seal 216 is provided between the first housing 211 and the second housing 212 to sealingly connect the first housing 211 and the second housing 212. The second seal 216 may be a seal ring (e.g., an o-ring, v-ring, rectangular seal, etc.).

One of the inner wall of the first housing 211 and the outer wall of the second housing 212 is provided with a buckle 217, and the other is provided with a groove 218 matched with the buckle 217; the snaps 217 are provided at least two at intervals along the circumferential direction of the housing 21 or the snaps 217 extend in the entire circumferential direction of the housing 21; the grooves 218 are provided at least two at intervals along the circumferential direction of the housing 21 or the grooves 218 extend in the entire circumferential direction of the housing 21.

In the embodiment shown in fig. 3, the number of the buckles 217 is 3-8, and the buckles 217 are arranged on the inner wall of the first housing 211; correspondingly, grooves 218 corresponding to the buckles 217 one by one are arranged on the outer wall of the second shell 212.

In addition, a seal groove may be provided on the second housing 212 for receiving the second seal 216.

One of the first housing 211 and the second housing 212 is provided with a fitting 219 for connection to a patient interface device and the other is provided with an interface 210 for connection to a gas source. In the embodiment shown in fig. 3, the first housing 211 is provided with a connector 219, wherein the connector 219 may be a threaded pipe connector, a snap connector, a quick connector, or the like. The diameter of the connector 219 on the first housing 211 may range from 8-20mm. The second housing 212 is provided with an interface 210, such as a standard 22mm interface or a dedicated interface, for facilitating connection of the air supply.

With continued reference to fig. 1 and 2, a hook 25 is further disposed on an outer wall of the first housing 211, and the pipe fixing clip 13 may be connected to the hook 25, so that the ventilation pipe 12 may be fixed by the pipe fixing clip 13, so as to avoid pulling the ventilation pipe 12.

As described above, the first housing 211 and the second housing 212 may be made of plastic, and thus the trigger element 24 thereon is also made of plastic (the trigger element 24, the shoulder 214, and the like may be integrally formed with the first housing 211). The blocking member 22 may also be of plastics material.

Example 2

In this embodiment 2, unlike embodiment 1 described above, one of the first housing 211 and the second housing 212 has a female head 3 attached thereto for connection to a patient interface device, and the other has a male head 4 attached thereto for connection to a gas source.

As shown in fig. 4, a male 4 (e.g., a 22mm standard male) is connected to the first housing 211 for connection to a gas source. Attached to the second housing 212 is a female 3 (e.g., a 22mm standard female) for connection to a patient interface device, such as to the ventilation tube 12.

The same points of this embodiment 2 as those of the above-described embodiment 1 will not be described in detail.

Example 3

As shown in fig. 5, in this embodiment 3, unlike the above embodiment 1, the number of the blocking devices 2 is two, the two blocking devices 2 are symmetrically disposed about the connection thereof, and the female heads 3 (for example, standard female heads of 22 mm) are respectively connected to the ends of the two blocking devices 2 away from each other.

In this embodiment 3, since the blocking device 2 is two blocking devices symmetrical to each other, it can achieve the purpose of bidirectional fire blocking, and in the use process, the blocking devices 2 do not need to use the connection sequence respectively due to the symmetry, so that the assembly efficiency can be improved.

The same points of this embodiment 3 as those of the above-described embodiment 1 will not be described again.

Example 4

As shown in fig. 6, in this embodiment 4, unlike the above embodiment 1, the number of the blocking devices 2 is two, the two blocking devices 2 are symmetrically disposed about the connection thereof, and the male heads 4 (for example, standard male heads of 22 mm) are respectively connected to the ends of the two blocking devices 2 away from each other.

In embodiment 4, since the blocking device 2 is two blocking devices symmetrical to each other, the purpose of bidirectional fire blocking can be achieved, and in the use process, the blocking devices 2 do not need to use the connection sequence respectively due to the symmetry, so that the assembly efficiency can be improved.

The same points of this embodiment 4 as those of the above-described embodiment 1 will not be described again.

Example 5

In this embodiment 5, unlike each of the above-described embodiments 1, 2, 3, or 4, the patient interface device includes a breathing mask including a mask body for wearing on the face of a patient and connection pipes connected to the mask body and the air source, respectively, and the blocking device 2 is provided on the connection pipes.

The breathing mask can be a nasal mask, an oral-nasal mask, a nasal pillow or a full face mask, etc.

In some embodiments, the blocking device 2 and the vent pipe 12 are in a connecting pipe structure, and the blocking device and the vent pipe are connected through assembly. In other embodiments, the blocking device 2 is integrally formed with the connecting tube.

Similar to the above-described embodiment 1, the blocking device 2 may be disposed at a middle position of the connection pipe such that both ends of the blocking device 2 are respectively connected to the connection pipe; or the blocking device 2 is arranged at the end position of the connecting pipe, so that one end of the blocking device 2 is connected with the end of the connecting pipe, and the other end of the blocking device 2 is connected with the mask body or the air source.

The points of embodiment 5 that are the same as those of embodiment 1, embodiment 2, embodiment 3 or embodiment 4 described above will not be described again.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A patient interface device comprising a vent tube or connecting tube for delivering ventilation gas to a patient, the vent tube or connecting tube having a blocking device disposed thereon, the blocking device comprising a housing having a ventilation circuit;

the blocking device is configured to be in a first state, and is in gas conduction with the ventilation pipe or the connecting pipe, and when the blocking device is switched from the first state to a second state, the blocking device is configured to block gas conduction between the ventilation pipe and the ventilation pipe or the connecting pipe;

the blocking device further comprises a blocking piece arranged in the ventilation channel, and the blocking piece is constructed into a fusiform structure; one end of the blocking piece is a trigger end, and the other opposite end of the blocking piece is a sealing end;

wherein, when the blocking device is in a first state, the triggering end of the blocking member maintains it in a first position and opens the ventilation circuit, thereby rendering the patient interface device conductive;

when the blocking device is switched from the first state to the second state, the blocking member moves from the first position to the second position along the axial direction of the housing, and the sealing end of the blocking member closes the ventilation passage, thereby blocking the patient interface device.

2. The patient interface device according to claim 1, wherein the patient interface device comprises a nasal oxygen cannula device comprising a nasal oxygen cannula for wearing on a patient's face, the airway tube being connected to the nasal oxygen cannula and a source of gas, respectively.

3. The patient interface device according to claim 1, wherein the patient interface device comprises a respiratory mask comprising a mask body for wearing on a patient's face, the connection tube being connected to the mask body and a gas source, respectively.

4. The patient interface device according to any one of claims 1-3, wherein the housing is either fittingly connected to the ventilation tube or integrally formed with the ventilation tube.

5. The patient interface device according to any one of claims 1-3, wherein the housing is fittingly connected to or integrally formed with the connection tube.

6. The patient interface device according to claim 2, wherein the housing is disposed at a central location of the vent tube such that both ends of the housing are respectively connected to the vent tube; or alternatively

7. A patient interface device according to claim 3, wherein the housing is provided at a central position of the connection tube such that both ends of the housing are respectively connected to the connection tube; or alternatively

8. The patient interface device according to claim 1, wherein the blocking device further comprises a releasable element disposed in the ventilation circuit, the releasable element being connected to the blocking member;

9. The patient interface device according to claim 8, wherein the blocking device further comprises a trigger element coupled to the blocking member, the trigger element for maintaining the blocking member in the first state and causing the releasable element to be locked;

10. The patient interface device according to claim 9, wherein a shoulder having a reduced inner diameter is provided in the airway, wherein the sealing end of the blocking member is spaced away from the shoulder when the blocking member is in the first position, causing the airway to open; when the blocking piece is positioned at the second position, the sealing end of the blocking piece is connected with the shoulder in a sealing way so as to block the ventilation path.

11. The patient interface device according to claim 10, wherein the shoulder has a mating ramp, the sealing end of the blocking member having a first sealing member embedded therein, the first sealing member being sealingly coupled to the mating ramp to block the ventilation circuit when the blocking member is in the second position.

12. The patient interface device according to claim 10, wherein the sealing end of the blocking member is further provided with a connection flange, one end of the releasable element being in abutment with the connection flange and the other end of the releasable element being in abutment with an inner wall of the housing.

13. The patient interface device according to claim 10, wherein the trigger element is configured as a support disposed on the inner wall of the housing, the support being located proximate the end of the housing, the support being connected to the trigger end of the blocking member to lock the releasable element between the support and the sealing end of the blocking member;

14. The patient interface device according to claim 13, wherein the support body comprises at least two support prongs at an angle to an axis of the housing or a frustoconical structure tapering in diameter along an axis of the housing.

15. The patient interface device according to claim 14, wherein the trigger end of the blocking member is configured as a tapered end that passes through a gap between at least two of the support pawls and is snap-connected with an end of the support pawl, or

16. The patient interface device according to claim 13, wherein the support body is adhesively attached to the trigger end of the blocking member.

17. The patient interface device according to claim 8, wherein the releasable element is configured as a spring, the spring being made of a metallic material.

18. The patient interface device according to claim 9, wherein a guide structure is further provided on an outer wall of the blocking member, the guide structure being located between the trigger element and the releasable element for cooperating with an inner surface of the housing to allow the blocking member to be moved from the first position to the second position.

19. The patient interface device according to any one of claims 1-3, wherein the housing comprises a first housing and a second housing, the first housing and the second housing each being hollow structures, the hollow structures defining the ventilation circuit upon connection of the first housing and the second housing;

20. The patient interface device according to claim 19, wherein one of the inner wall of the first housing and the outer wall of the second housing is provided with a catch and the other is provided with a groove that mates with the catch;

21. The patient interface device according to claim 19, wherein one of the first housing and the second housing is provided with a connector for connection to the patient interface device and the other is provided with an interface for connection to a gas source.

22. The patient interface device according to claim 21, wherein the connector is a threaded tubing connector, a snap connector, or a quick-connect connector.

23. The patient interface device according to claim 21, wherein one of the first and second housings has a female head connected thereto for connection to the patient interface device and the other has a male head connected thereto for connection to a gas source.

24. A patient interface device according to any one of claims 1-3, wherein the number of blocking means is two, the blocking means being symmetrically arranged about their connection, the end of the blocking means remote from each other being connected to a male or female end, respectively.