Disposable reinforced nasopharyngeal airway

Abstract

The utility model discloses a disposable reinforced nasopharyngeal airway, which comprises a ventilation catheter assembly, a drainage catheter assembly and a drainage catheter assembly, the ventilation catheter assembly comprises a catheter body with a hollow cavity, a limiting nose plug and a pipeline connector, and the limiting nose plug and the pipeline connector are arranged at the end, close to the hand, of the catheter body; a connecting hole communicated with the hollow inner cavity of the catheter body is formed in the pipeline joint; at least one opening communicated with the hollow cavity is formed in the end, far away from the hand, of the catheter body; the inner core tube comprises a spring supporting core suitable for being inserted into the hollow inner cavity of the catheter body after penetrating through the connecting hole and a handle part connected with the spring supporting core and suitable for being held by hand; a connecting piece used for fixing and limiting the nasal plug and the pipeline connector is arranged at the end, close to the hand, of the catheter body. The limiting nose plug and the pipeline connector are suitable for being connected with the connecting piece in a clamped mode.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a disposable reinforced nasopharyngeal airway. Background Art

[0002] The respiratory system is one of the main systems that maintain the normal functioning of our body in our daily lives. When people are sick or unable to breathe freely during treatment, they need some external factors to assist breathing, and the nasopharyngeal airway is a medical device used to assist patients in breathing. The nasopharyngeal airway is very suitable for some patients who have difficulty inserting the mouth due to the closure of the jaw after sudden syncope, and the nasopharyngeal airway will not affect the patient's speech after insertion like the throat airway.

[0003] In this regard, during the use of the nasopharyngeal airway, a nasal plug is needed to fix its position, and a connector is used to connect the gas pipeline. Here, both the nasal plug and the connector need to be connected to the nasopharyngeal airway. Therefore, the firmness of the connection structure formed by the nasal plug and the connector with the nasopharyngeal airway directly affects the stability of the use process. However, for disposable medical devices, considering the production cost of the controller, if a cumbersome structure is used to achieve a firm connection between the above components, not only will the assembly be difficult, but the production cost will also increase. Therefore, for disposable medical devices, it is necessary to achieve the purpose of reducing production costs by simplifying the structure as much as possible.

[0004] In addition, the prior art uses a nasopharyngeal ventilation tube disclosed in the announcement number CN220495380U, which includes a nasopharyngeal tube body with an inner cavity, and an oxygen channel and a carbon dioxide channel are provided on the side wall of the nasopharyngeal tube body, wherein the oxygen channel can be connected to the oxygen connecting pipe, and the carbon dioxide channel is connected to the carbon dioxide connecting pipe. The nasopharyngeal tube body here is made of elastic material. During the insertion process of the tube body into the nasopharyngeal cavity, the tube body made of elastic material may be bent and deformed, resulting in the inability to ensure its restoration effect, thereby causing a poor conformal matching effect with the patient's nasopharyngeal cavity; on the other hand, the tube body made of elastic material also has the problem of poor strength during the insertion process. The curved nasopharyngeal cavity may cause the wall of the nasopharyngeal airway to deform or be unable to be inserted, so the insertion process has the problem of difficult operation. In view of this situation, if the smoothness of the insertion process is improved by enhancing the strength of the tube body, it may cause damage to the cavity wall of the nasal cavity and the cavity wall of the pharyngeal cavity.

[0005] Therefore, for the nasopharyngeal airway, not only the ventilation problem needs to be considered, but also the smoothness of the insertion process and the reduction of damage to the nasal and pharyngeal walls, as well as the purpose of reducing production costs. Utility Model Content

[0006] The object of the present utility model is to provide a disposable reinforced nasopharyngeal airway to solve the technical problem of optimizing its overall performance in use.

[0007] The disposable reinforced nasopharyngeal airway of the present utility model is implemented as follows:

[0008] A disposable reinforced nasopharyngeal airway, comprising:

[0009] A ventilation catheter assembly, which includes a catheter body having a hollow cavity, a limit nasal plug and a pipeline joint provided at the near-hand end of the catheter body; a connection hole communicating with the hollow inner cavity of the catheter body is provided in the pipeline joint; at least one opening communicating with the hollow cavity is formed at the far-hand end of the catheter body; and

[0010] An inner core tube, which includes a spring support core adapted to be inserted into the hollow inner cavity of the catheter body after passing through the connection hole and a handle portion adapted to be held connected to the spring support core; wherein

[0011] An adapter is provided at the near-hand end of the catheter body for fixing the limit nasal plug and the pipeline joint; the limit nasal plug and the pipeline joint are respectively adapted to be snap-connected to the adapter.

[0012] In an optional embodiment of the present utility model, the adapter includes a rigid sleeve fixedly connected to the far-hand end of the catheter body, and a first limit portion and a second limit portion in the shape of a protrusion provided on the outer side wall of the rigid sleeve; wherein

[0013] The first limit portion and the second limit portion are arranged at intervals along the axial direction of the rigid sleeve;

[0014] The first limit portion is adapted to be snap-connected to the limit nasal plug, and the second limit portion is adapted to be snap-connected to the pipeline joint.

[0015] In an optional embodiment of the present utility model, the limit nasal plug includes a collar formed with a through hole and a pair of wings protruding from the outer side wall of the collar;

[0016] The through hole includes a small inner diameter hole adapted to the catheter body and a large inner diameter hole adapted to the rigid sleeve; the inner diameter of the large inner diameter hole is greater than the inner diameter of the small inner diameter hole.

[0017] In an optional embodiment of the present utility model, the first limit portion is an annular protrusion provided on the outer side wall of the rigid sleeve; and

[0018] An annular limit groove adapted for the first limit portion to be embedded therein is provided in the large inner diameter hole.

[0019] In an alternative embodiment of the present utility model, the pipeline connector is provided with a plug adapted to be inserted into a large-diameter hole and plugged and connected with a rigid sleeve; a through hole is formed inside the plug to penetrate through the connection hole; and

[0020] The second limiting portion is at least one convex block provided on the outer side wall of the rigid sleeve; and

[0021] An annular groove adapted for the second limiting portion to be clamped therein is provided on the inner hole wall of the through hole.

[0022] In an alternative embodiment of the present utility model, the spring support core is made of an elastic spring.

[0023] In an alternative embodiment of the present utility model, the length of the spring support core is less than the length of the catheter body. When the spring support core completely enters the hollow cavity of the catheter body, there is a distance between the distal end of the spring support core and the distal end of the catheter body.

[0024] In an alternative embodiment of the present utility model, the spring support member and the flexible tube body are integrally formed by insert injection molding.

[0025] In an alternative embodiment of the present utility model, the catheter body includes a first tube body and a second tube body that are connected together to jointly form the hollow cavity; wherein

[0026] The first tube body is located on the side where the proximal end is located, and the second tube body is located on the side where the distal end is located; and

[0027] Both the first tube body and the second tube body are made of a flexible material, and the softness of the second tube body is greater than that of the first tube body.

[0028] In an alternative embodiment of the present utility model, a reduced diameter structure is formed at the distal end of the catheter body; and

[0029] At least one of the openings is formed on the side wall of the reduced diameter structure.

[0030] Adopting the above technical solution, the utility model has the following beneficial effects: For the disposable reinforced nasopharyngeal airway of the utility model, through the inner core tube that can be inserted into the catheter body, when the nasopharyngeal airway is intubated, due to the deformability of the spring support core, it can form a curved shape matching the nasopharyngeal cavity. In this way, through the deformation of the spring support core for adjustment, the overall nasopharyngeal airway is guided to form a curved shape matching the nasopharyngeal cavity channel, reducing the risk of nasal mucosa injury and bleeding caused by the mismatch between the curvature of the nasopharyngeal airway and the patient's nasopharyngeal cavity, and decreasing the incidence of nasal mucosa injury and bleeding. The spring support core adopted has low production cost and is especially suitable for disposable instruments. In addition, through the design of the connecting piece, the pipeline joint and the nasal plug can be firmly connected to it respectively, and only through direct plug-in assembly, the operation is convenient and efficient. Description of the Drawings

[0031] Figure 1 It is a structural schematic diagram of the disposable reinforced nasopharyngeal airway of the utility model;

[0032] Figure 2 It is a partial exploded structural schematic diagram of the disposable reinforced nasopharyngeal airway of the utility model;

[0033] Figure 3 It is an overall exploded structural schematic diagram of the disposable reinforced nasopharyngeal airway of the utility model;

[0034] Figure 4 It is a sectional structural schematic diagram of the disposable reinforced nasopharyngeal airway of the utility model;

[0035] Figure 5 It is a structural schematic diagram of the connecting piece of the disposable reinforced nasopharyngeal airway of the utility model;

[0036] Figure 6 It is a sectional structural schematic diagram of the limiting nasal plug of the disposable reinforced nasopharyngeal airway of the utility model;

[0037] Figure 7 It is a partial structural schematic diagram of the disposable reinforced nasopharyngeal airway of the utility model;

[0038] Figure 8 It is a structural schematic diagram of the catheter body of the disposable reinforced nasopharyngeal airway of the utility model corresponding to Example 2 under one implementation condition;

[0039] Figure 9 It is a structural schematic diagram of the catheter body of the disposable reinforced nasopharyngeal airway of the utility model corresponding to Example 2 under another implementation condition;

[0040] Figure 10This is a partial cross-sectional structural schematic diagram corresponding to the catheter body of the disposable enhanced nasopharyngeal airway of the present utility model. Figure 7 of the local cross-sectional structure diagram.

[0041] In the figure: catheter body 100, limit nasal plug 200, collar 201, fin 202, small inner diameter hole 203, large inner diameter hole 205, rib 206, pipeline joint 300, plug 301, annular groove 303, spring support 400, connecting piece 500, rigid sleeve 501, first limit part 502, second limit part 503, spring support core 601, handle part 602, first tube body 1, convex fin 12, guiding surface 121, abutting surface 122, second tube body 2, necking structure 21, opening 22, fitting groove 23. Specific embodiments

[0042] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the drawings.

[0043] It should be noted that in this embodiment, both the "far hand end" and the "near hand end" are determined relative to the position of the medical staff's hand when operating the instrument. The end relatively close to the hand position is the "near hand end", and the end relatively far from the hand position is the "far hand end".

[0044] Embodiment 1: Please refer to Figures 1 to 7 As shown, this embodiment provides a disposable enhanced nasopharyngeal airway, including: a ventilation catheter assembly and an inner core tube used in cooperation.

[0045] Next, in detail, first is the ventilation catheter assembly:

[0046] Generally speaking, the ventilation catheter assembly includes a catheter body 100 having a hollow cavity, a limit nasal plug 200 provided on the near hand end of the catheter body 100, and a pipeline joint 300. Here, at least one opening 22 communicating with the hollow cavity is formed at the far hand end of the catheter body 100. The opening 22 here can include both the end of the catheter body 100 and the side wall, and this embodiment does not make an absolute limitation on this.

[0047] The limit nasal plug 200 is sleeved on the outer wall of the catheter body 100 and does not need to communicate with the hollow cavity of the catheter body 100. The limit nasal plug 200 can be made of materials such as rubber, silica gel, and elastic plastic. The pipeline joint 300 needs to communicate with the hollow inner cavity of the catheter body 100, so that liquid or gas can be passed into the hollow inner cavity through the pipeline joint 300. For this, a connection hole communicating with the hollow inner cavity of the catheter body 100 is provided in the pipeline joint 300.

[0048] To facilitate the secure assembly of the limit nasal plug 200 and the pipeline joint 300 with the catheter body 100, the following design is made in this embodiment:

[0049] Generally speaking, an adapter 500 for fixing the limit nasal plug 200 and the pipeline joint 300 is provided at the proximal end of the catheter body 100; the limit nasal plug 200 and the pipeline joint 300 are respectively adapted to be snap-connected to the adapter 500.

[0050] Specifically in combination with the accompanying drawings,

[0051] The adapter 500 includes a rigid sleeve 501 fixedly connected to the distal end of the catheter body 100, and a first limiting portion 502 and a second limiting portion 503 in the shape of protrusions provided on the outer side wall of the rigid sleeve 501; the first limiting portion 502 and the second limiting portion 503 are arranged at intervals along the axial direction of the rigid sleeve 501; the first limiting portion 502 is adapted to be snap-connected to the limit nasal plug 200, and the second limiting portion 503 is adapted to be snap-connected to the pipeline joint 300. The rigid sleeve 501 itself can be connected to the distal end of the catheter body 100 by bonding or ultrasonic welding. The rigid sleeve 501 has a socket hole for socketing and cooperating with the catheter body 100. When it is sleeved on the catheter body 100, a part of the socket hole is communicated with the hollow cavity of the catheter body 100, so that when the pipeline joint 300 is connected to the rigid sleeve 501, a liquid or gas passage can be formed by communicating among the connection hole of the pipeline joint 300, the socket hole of the rigid sleeve 501 and the hollow cavity of the catheter body 100.

[0052] Furthermore, the limit nasal plug 200 adopted in this embodiment includes a collar 201 formed with a through hole and a pair of wings 202 protruding from the outer side wall of the collar 201. Among them, the through hole includes a small inner diameter hole 203 adapted to the catheter body 100 and a large inner diameter hole 205 adapted to the rigid sleeve 501; the inner diameter of the large inner diameter hole 205 is greater than the inner diameter of the small inner diameter hole 203. On this basis, taking an optional case as an example in combination with the accompanying drawings, the first limiting portion 502 is an annular protrusion provided on the outer side wall of the rigid sleeve 501; and an annular limiting groove adapted for the first limiting portion 502 to be embedded therein is provided in the large inner diameter hole 205.

[0053] During the assembly process of the limit nasal plug 200 and the rigid sleeve 501, the distal end of the catheter body 100 is first inserted into the limit nasal plug 200, and then the limit nasal plug 200 moves along the length direction of the catheter body 100 until a part of the rigid sleeve 501 enters the large-diameter hole 205. And when the first limit portion 502 is engaged in the limit groove, it indicates that the limit nasal plug 200 and the catheter body 100 have been assembled in place. It should be noted that the limit groove here is formed by enclosing two convex ribs 206 protruding on the inner wall of the large-diameter hole 205. In this way, when the limit nasal plug 200 and the catheter body 100 are assembled in place, a "click" - like prompt sound will be emitted due to the hard friction between the annular protrusion on the rigid sleeve 501 and one of the convex ribs 206 of the large-diameter hole 205.

[0054] In addition, it should also be noted that the pipeline joint 300 is provided with a plug 301 adapted to be inserted into the large-diameter hole 205 and plugged and connected with the rigid sleeve 501; a through hole communicating with the connection hole is formed inside the plug 301. In this regard, in combination with the attached drawings, an optional situation is exemplified. The second limit portion 503 is at least one convex block provided on the outer side wall of the rigid sleeve 501; and an annular groove 303 adapted for the second limit portion 503 to be engaged therein is provided on the inner hole wall of the through hole.

[0055] Based on this structure, during the assembly process of the pipeline joint 300 and the rigid sleeve 501, the rigid sleeve 501 is gradually inserted into the connection hole of the pipeline joint 300. When the second limit portion 503 is engaged in the annular groove 303, it indicates that the pipeline joint 300 and the rigid sleeve 501 have been assembled in place. It should be noted that the annular groove 303 here is formed by enclosing two convex rings protruding on the inner hole wall of the through hole. In this way, when the pipeline joint 300 and the rigid sleeve 501 are assembled in place, a "click" - like prompt sound will be emitted due to the hard friction between the convex block on the rigid sleeve 501 and one of the convex rings of the through hole.

[0056] Next, the inner core tube will be described: Generally, it includes a spring support core 601 adapted to be inserted into the hollow inner cavity of the catheter body 100 after passing through the connection hole and a handle portion 602 adapted to be held and connected to the spring support core 601.

[0057] Based on the above structure, it should be noted that the length of the spring support core 601 is less than the length of the catheter body 100. When the spring support core 601 completely enters the hollow cavity of the catheter body 100, there is a distance between the distal end of the spring support core 601 and the distal end of the catheter body 100. Such a design is to maintain the flexibility of the distal end of the catheter body 100 during intubation.

[0058] Here, through the cooperation between the spring-supported core 601 and the catheter body 100, when the nasopharyngeal airway is intubated, due to the deformability of the spring-supported core 601, it can form a curved shape matching the nasopharyngeal cavity. In this way, through the deformation of the spring-supported core 601 for adjustment, the overall nasopharyngeal airway is guided to form a curved shape matching the nasopharyngeal cavity channel, reducing the risk of nasal mucosa injury and bleeding caused by the non-conformity between the curvature of the nasopharyngeal airway and the patient's nasopharyngeal cavity, and decreasing the incidence of nasal mucosa injury and bleeding.

[0059] Embodiment 2: Please refer to Figures 8 to 10 As shown, on the basis of the disposable reinforced nasopharyngeal airway in Embodiment 1, the catheter body 100 of the disposable reinforced nasopharyngeal airway provided in this embodiment includes a first tube body 1 and a second tube body 2 that are connected together to jointly form a hollow cavity; wherein the first tube body 1 is located on the side where the proximal end is close to the hand, and the second tube body 2 is located on the side where the distal end is close to the hand.

[0060] Optionally, in one implementation case, the first tube body 1 and the second tube body 2 are fixedly connected by welding, and in other embodiments, it can also be achieved by glue.

[0061] Taking a specific and optional case as an example in combination with the accompanying drawings, the first tube body 1 and the second tube body 2 are fixedly connected by insertion.

[0062] More specifically, the outer side of the distal end of the first tube body 1 has a plurality of convex wings 12, and the plurality of convex wings 12 are equidistantly distributed along the length trajectory of the first tube body 1. A plurality of fitting grooves 23 adapted to the convex wings 12 are opened on the inner side of one end of the second tube body 2 away from the necking structure 21, and the plurality of fitting grooves 23 are equidistantly distributed along the length trajectory of the second tube body 2. After the first tube body 1 and the second tube body 2 are installed and connected, the first tube body 1 and the second tube body 2 are in interference fit, and one end of the second tube body 2 away from the necking structure 21 is sleeved on the distal end of the first tube body 1, and at least one convex wing 12 is caught in the fitting groove 23.

[0063] Furthermore, the convex wing 12 includes a guiding surface 121 and an abutting surface 122. The guiding surface 121 is located at the end of the convex wing 12 away from the limiting nasal plug 200, and the guiding surface 121 is an inclined surface, and the cross-sectional dimension of the guiding surface 121 at the end close to the limiting nasal plug 200 is the largest; the abutting surface 122 is located at the end of the convex wing 12 close to the limiting nasal plug 200. After the convex wing 12 is caught in the fitting groove 23, if there is a tendency for the first pipe fitting and the second pipe fitting to separate, the abutting surface 122 will abut against the groove wall of the fitting groove 23 to prevent the two from separating. In this embodiment, optionally, the cross-section of the convex wing 12 is a right-angled triangle.

[0064] In this regard, the distal end of the first tube body 1 is inserted into one end of the second tube body 2 away from the necking structure 21, so that at least one convex fin 12 is snapped into the fitting groove 23, improving the connection strength between the first tube body 1 and the second tube body 2, and increasing the difficulty of separating the first tube body 1 from the second tube body 2, effectively avoiding the separation of the first tube body 1 and the second tube body 2 during the use of the nasopharyngeal airway. Moreover, for the catheter body 100 with such a structure, according to different usage scenarios, the number of convex fins 12 that can be snapped into the fitting groove 23 and the position of the fitting groove 23 into which the convex fins 12 are snapped can be adjusted, thereby adjusting the connection strength between the first tube body 1 and the second tube body 2 and the length of the nasopharyngeal airway, so as to improve the flexibility during its use.

[0065] Furthermore, both the first tube body 1 and the second tube body 2 are made of flexible materials, and the softness of the second tube body 2 is greater than that of the first tube body 1. The better softness of the second tube body 2 can reduce the probability of damaging the cavity wall during the insertion of the nasal catheter body 100 from the nasal cavity into the pharyngeal cavity. Optionally, the first tube body 1 is made of soft plastic, and the second tube body 2 is made of soft rubber. In other embodiments, other materials can also be selected for the first tube body 1 and the second tube body 2.

[0066] Based on the above structure, the catheter body 100 adopted in this embodiment can also be deformed as follows:

[0067] A necking structure 21 is formed at the distal end of the catheter body 100; at this time, at least one opening 22 communicating with the hollow cavity is formed on the side wall of the necking structure 21 at the distal end of the catheter body 100. In this structure, the necking structure 21 can facilitate the insertion of the distal end of the catheter body 100 from the nasal cavity into the pharyngeal cavity, and the opening 22 can increase the air flow through the catheter body 100.

[0068] Embodiment 3: Please refer to Figures 1 to 7 As shown, based on the disposable reinforced nasopharyngeal airway in Embodiment 1, the catheter body 100 of the disposable reinforced nasopharyngeal airway provided in this embodiment includes a flexible tube body and a spring support member 400 provided on the inner wall of the flexible tube body. It should be noted that, in an optional embodiment, for the spring support member 400 here, it does not extend to the part of the flexible tube body where the opening 22 is provided in the flexible tube body, that is, the part where the opening 22 is designed does not have the spring support member 400.

[0069] The flexible tube body here can be made of, for example, silicone or polyvinyl chloride materials, and preferably medical PVC tubes or medical TPU tubes. In an alternative embodiment, a hydrophilic coating is provided on the outer surface of the flexible tube body. The hydrophilic coating is a hydrophilic group polymer hydrophilic coating or a hydrophilic group monomer hydrophilic coating. With this design, the flexible tube body has the characteristics of low resistance and good sliding performance, which can reduce the resistance during the intubation and extubation of the nasopharyngeal airway through the nasal cavity, thereby reducing the damage to the nasal mucosa caused by the nasopharyngeal airway during use.

[0070] For the spring support 400, it can be made of medical grade 316 stainless steel. The spring support 400 here can provide sufficient supporting force and anti-kinking force for the flexible tube body, and can serve as a guiding structure and a supporting structure for intubation when the flexible tube body is intubated; at the same time, the spring support 400 also has flexibility so that it can deform along with the bent part of the nasopharyngeal cavity channel, which is beneficial for passing through the nasal cavity and can reduce the damage to the nasal cavity and the lateral wall of the pharynx.

[0071] On the basis of the above structure, considering the convenience of processing and forming, the spring support 400 and the flexible tube body are processed by insert injection molding. On the one hand, this makes the structure formed by the spring support 400 and the flexible tube body more firm, and on the other hand, it makes the spring support 400 and the flexible tube body have better consistency during use, so that the spring support 400 can not only give a certain strength to the flexible tube body but also form a bent shape matching the nasopharyngeal cavity along with the flexible tube body, which can significantly reduce the incidence of nasal mucosa damage and bleeding. In addition, using the spring support 400 can also effectively reduce the production cost of the disposable reinforced nasopharyngeal airway.

[0072] In the above specific embodiments, the purpose, technical solutions and beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0073] In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0074] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0075] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0076] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0077] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features between them. Moreover, the first feature being above, over and on the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under and beneath the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

Claims

1. A disposable reinforced nasopharyngeal airway, characterized in that, Comprising: A ventilation catheter assembly, which includes a catheter body having a hollow cavity, a limit nasal plug and a pipeline joint provided on the near-hand end of the catheter body; A connection hole communicating with the hollow inner cavity of the catheter body is provided in the pipeline joint; at least one opening communicating with the hollow cavity is formed at the far-hand end of the catheter body; And An inner core tube, which includes a spring support core adapted to be inserted into the hollow inner cavity of the catheter body after passing through the connection hole and a handle part adapted to be held connected to the spring support core; Wherein An adapter is provided on the near-hand end of the catheter body for fixing the limit nasal plug and the pipeline joint; the limit nasal plug and the pipeline joint are respectively adapted to be snap-connected to the adapter.

2. The disposable reinforced nasopharyngeal airway according to claim 1, wherein The adapter includes a rigid sleeve fixedly connected to the far-hand end of the catheter body, and a first limit portion and a second limit portion in the shape of a protrusion provided on the outer side wall of the rigid sleeve; wherein The first limit portion and the second limit portion are arranged at intervals along the axial direction of the rigid sleeve; The first limit portion is adapted to be snap-connected to the limit nasal plug, and the second limit portion is adapted to be snap-connected to the pipeline joint.

3. The disposable reinforced nasopharyngeal airway according to claim 2, wherein The limit nasal plug includes a collar formed with a through hole and a pair of wings protruding from the outer side wall of the collar; The through hole includes a small inner diameter hole adapted to the catheter body and a large inner diameter hole adapted to the rigid sleeve; the inner diameter of the large inner diameter hole is greater than the inner diameter of the small inner diameter hole.

4. The disposable reinforced nasopharyngeal airway according to claim 3, wherein The first limit portion is an annular protrusion provided on the outer side wall of the rigid sleeve; and An annular limit groove adapted for the first limit portion to be embedded therein is provided in the large inner diameter hole.

5. The disposable reinforced nasopharyngeal airway according to claim 3 or 4, characterized in that, A plug adapted to be inserted into the large inner diameter hole to be inserted and connected to the rigid sleeve is provided on the pipeline joint; a through hole communicating with the connection hole is formed inside the plug; and The second limit portion is at least one convex block provided on the outer side wall of the rigid sleeve; and An annular groove adapted for the second limit portion to be embedded therein is provided on the inner hole wall of the through hole.

6. The disposable reinforced nasopharyngeal airway according to claim 1, characterized in that, The length of the spring support core is less than the length of the catheter body. When the spring support core completely enters the hollow cavity of the catheter body, there is a distance between the far-hand end of the spring support core and the far-hand end of the catheter body.

7. The disposable reinforced nasopharyngeal airway according to claim 1 or 6, characterized in that, The catheter body includes a flexible tube body and a spring support member provided on the inner wall of the flexible tube body.

8. The disposable reinforced nasopharyngeal airway according to claim 7, wherein The spring support member and the flexible tube body are integrally formed by insert injection molding.

9. The disposable reinforced nasopharyngeal airway according to claim 1, wherein The catheter body includes a first tube body and a second tube body that are connected together to jointly form the hollow cavity; wherein The first tube body is located on the side where the near-hand end is located, and the second tube body is located on the side where the far-hand end is located; and Both the first tube body and the second tube body are made of a flexible material, and the softness of the second tube body is greater than that of the first tube body.

10. The disposable reinforced nasopharyngeal airway according to claim 1, wherein A reduced diameter structure is formed at the far-hand end of the catheter body; and At least one of the openings is formed on the side wall of the reduced diameter structure.

Images