CN112274435A

CN112274435A - Anti-reflux nasogastric tube

Info

Publication number: CN112274435A
Application number: CN201910663400.3A
Authority: CN
Inventors: 洪伟祯; 林杭逸
Original assignee: Atom Health Corp
Current assignee: Atom Health Corp
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2021-01-29

Abstract

The embodiment of the invention provides an anti-reflux nasogastric tube, which comprises a tube body and a positioning sleeve; the tube body is provided with a first end and a second end, the first end is provided with an opening, the second end is provided with at least one hole, and the opening is communicated with the at least one hole through a pipeline; the positioning sleeve is arranged at the opening and is provided with a sleeving part and an outer edge, the outer edge is arranged at one end of the sleeving part, and the outer diameter of the outer edge is larger than the inner diameter of the nostril of the human body. Therefore, the anti-backflow connector can be clamped in the nasal cavity of the human body through the structure of the positioning sleeve, the tube body is not required to be adhered to the cheek of the human body through an adhering mode, discomfort of a patient is reduced, attractiveness is improved, and the situation of careless pulling can be avoided.

Description

Anti-reflux nasogastric tube

Technical Field

The invention relates to a nasogastric tube, in particular to an anti-reflux nasogastric tube which is arranged in a nasal cavity of a human body to reduce discomfort of a patient, improve attractiveness and avoid the situation of being pulled carelessly.

Background

The nasogastric tube is a flexible tube, is placed in the stomach through the nasal cavity and the esophagus, and can enable a patient to smoothly take food from the nasal cavity; the liquid food is conveyed through the nasogastric tube, so that the burden on the esophagus is reduced, and the throat with wounds and the esophagus are healed conveniently after the operation.

Fig. 1 is a schematic illustration of the use of a first prior art nasogastric tube 80. As shown in FIG. 1, a conventional nasogastric tube 80 comprises a tube 81 and a connector 82; one end of the tube 81 is connected with the joint 82, and the other end is placed in the stomach through the nasal cavity and the esophagus of the human body; the connector 82 has an opening 821 for connection to a filling needle (not shown) or a feeding barrel (not shown). The liquid food passes through the feeding hollow needle or the feeding barrel, the connector 82 of the nasogastric tube 80 and the tube body 81 in sequence, so that the liquid food enters the stomach of the human body.

In order to facilitate the feeding, the tube 81 having one end of the connector 82 is generally adhered to the cheek of the human body; however, the sticking method is not only insecure but also uncomfortable for the patient, and the overlong nasogastric tube 80 is not beautiful when exposed; moreover, since the tube 81 is too long, it is impossible to avoid the inadvertent pulling even by the sticking method.

In addition, the conventional connector 82 further has a plug 83 covering the opening 821 of the connector 82 to prevent the nasogastric tube 80 from being polluted by the environment and prevent the food remained in the tube 81 from flowing backwards; however, this structure still requires to cover the plug 83 tightly by hand; once the plug 83 is not plugged, the plug 83 may fall off, which is inconvenient in use and loses its original function.

Fig. 2 is a schematic illustration of the use of a second prior art right angle nasogastric tube 84. As shown in FIG. 2, a conventional right angle nasogastric tube 84 comprises a tube 81 and a right angle connector 85; one end of the tube body 81 is connected with the right-angle joint 85, and the other end is placed in the stomach through the nasal cavity and the esophagus of the human body; the right angle joint 85 has a first passage 851 and a second passage 852, the first passage 851 and the second passage 852 are communicated with each other, and the axes of the first passage 851 and the second passage 852 are perpendicular to each other.

However, in addition to the structure of right-angled nasogastric tube 84 not avoiding the disadvantages of the first prior nasogastric tube described above, right-angled connector 85 is more prone to liquid food residue that is difficult to clean.

Disclosure of Invention

The main object of the present invention is to provide an anti-reflux nasogastric tube, which is disposed in the nasal cavity of a human body, and is not required to be adhered to the cheek of the human body by means of adhesion, so as to reduce the discomfort of the patient, increase the aesthetic property, and avoid the situation of being inadvertently pulled.

Another object of the present invention is to provide an anti-reflux nasogastric tube having an anti-reflux fitting to prevent food from being discharged from the nasogastric tube in a reflux manner when a patient is perfused.

Still another object of the present invention is to provide an anti-reflux nasogastric tube, which has no dead angle difficult to clean, can avoid the problem of liquid food residue, and is cleaner and more sanitary in use.

In order to achieve the above object, the present invention provides an anti-reflux nasogastric tube, comprising a tube body and a positioning sleeve; the tube body is provided with a first end and a second end, the first end is provided with an opening, the second end is provided with at least one hole, and the opening is communicated with the at least one hole through a pipeline; the positioning sleeve is arranged at the opening and is provided with a sleeving part and an outer edge, the outer edge is arranged at one end of the sleeving part, and the outer diameter of the outer edge is larger than the inner diameter of the nostril of the human body.

In a preferred embodiment of the present invention, the anti-reflux nasogastric tube further comprises an anti-reflux connector disposed at the first end of the tube body and located in the sleeve portion, the anti-reflux connector comprises a housing and a non-return component, the housing has a channel, one end of the housing is provided with a connecting portion for connecting the integrated outer tube, and the non-return component is disposed in the channel.

In a preferred embodiment of the present invention, the channel has a first through hole, a second through hole and an accommodating space, the accommodating space is communicated between the first through hole and the second through hole, and the first through hole is used for communicating with the extracorporeal tube.

In a preferred embodiment of the present invention, the check assembly includes a shaft portion and a spring, the shaft portion has a first end, a second end, an abutting portion and a protruding ring, the first end of the shaft portion extends into the first through hole, the abutting portion is disposed at the first end of the shaft portion and has at least one through hole, the protruding ring is disposed between the first end and the second end of the shaft portion and is located in the accommodating space, an outer diameter of the protruding ring is larger than an inner diameter of the first through hole, the outer diameter of the protruding ring is smaller than the inner diameter of the accommodating space, the spring is sleeved at the second end of the shaft portion, one end of the spring abuts against the protruding ring, and the other end of the spring.

Wherein, backstop subassembly still includes a rubber ring, and the rubber ring sets up in the one side of the first end of bulge loop adjacent to the axial region, and the external diameter of rubber ring is greater than the internal diameter of first through-hole, and the internal diameter of rubber ring is less than the external diameter of bulge loop.

In a preferred embodiment of the present invention, the non-return assembly has a sealing portion, a through hole and a blocking portion, the sealing portion is located in the accommodating space, the through hole penetrates through the sealing portion, the blocking portion is disposed at one end of the sealing portion and located in the first through hole, and the top of the blocking portion is provided with at least one gap.

The shell further comprises a bottom shell which is provided with an internal thread and an extension pipe, and the extension pipe is provided with a second through hole.

In a preferred embodiment of the present invention, the anti-reflux nasogastric tube further comprises a plug having an outer diameter smaller than an inner diameter of the positioning sleeve for being disposed in the positioning sleeve.

In a preferred embodiment of the present invention, the housing further includes a positioning portion, the positioning portion is protruded at the middle section of the housing, and an outer diameter of the positioning portion is larger than an inner diameter of the sleeve portion, so that the sleeve portion is expanded outward by the positioning portion and positioned on the housing.

The technical effect of the embodiment of the invention is that the anti-reflux connector is clamped in the nasal cavity of the human body through the positioning sleeve, and the anti-reflux connector is not required to be adhered to the cheek of the human body in an adhering manner, so that the discomfort of a patient is reduced, the attractiveness is improved, and the situation of careless pulling can be avoided.

Moreover, the non-return component of the anti-reflux joint can automatically open the channel of the non-return component or the through hole of the non-return component when being connected with the outer pipe joint for feeding, and automatically close the channel of the non-return component or the through hole of the non-return component when being separated from the outer pipe joint, thereby achieving the effects of preventing the food remained in the pipe body from flowing backwards and preventing the nasogastric tube from being polluted by the environment.

Drawings

FIG. 1 is a schematic illustration of the use of a first prior art nasogastric tube;

FIG. 2 is a schematic illustration of the use of a second prior art right angle nasogastric tube;

FIG. 3 is a perspective view of an anti-reflux nasogastric tube of the first embodiment of the present invention;

FIG. 4 is an exploded perspective view of the anti-reflux nasogastric tube of the first embodiment of the present invention;

FIG. 5 is a cross-sectional view of an anti-reflux nasogastric tube of the first embodiment of the present invention;

FIG. 6 is a schematic view of the use of a first embodiment of the anti-reflux nasogastric tube of the present invention in connection with an extracorporeal tube;

FIG. 7 is a schematic view of the anti-reflux nasogastric tube of the first embodiment of the present invention in use in a human body;

FIG. 8 is a perspective view of an anti-reflux nasogastric tube according to a second embodiment of the present invention;

FIG. 9A is a front view of an anti-reflux nasogastric tube according to a second embodiment of the present invention;

FIG. 9B is a cross-sectional view of an anti-reflux nasogastric tube of a second embodiment of the present invention;

FIG. 10A is a front view of a second embodiment of the anti-reflux nasogastric tube of the present invention in connection with an external tube connector;

FIG. 10B is a cross-sectional view of a second embodiment of the anti-reflux nasogastric tube of the present invention in connection with an external tube connector;

FIG. 11A is a front view of a second embodiment of the anti-reflux nasogastric tube of the present invention after connection to an external tube connector;

FIG. 11B is a cross-sectional view of a second embodiment of the anti-reflux nasogastric tube of the present invention after connection to an external tube connector; and

fig. 12 is a perspective view of an anti-reflux nasogastric tube according to a third embodiment of the present invention.

Description of reference numerals:

10. a pipe body; 11. a first end; 12. a second end; 13. an opening; 14. a hole; 15. a pipeline;

20. 20a, an anti-reflux joint; 21. 21a, a housing; 211. 211a, a channel; 2111. 2111a, a first via; 2112. 2112a, a second via; 2113. 2113a, an accommodating space; 2114. a bottom wall;

22. 22a, a bottom shell; 221. 221a, an extension tube; 222a, internal threads; 23. 23a, a connecting portion; 24. a positioning part;

30. 30a, a backstop component; 31. a shaft portion; 311. a first end; 312. a second end; 313. an abutting portion; 3131. perforating; 314. a convex ring; 32. a spring; 33. a rubber ring; 31a, a sealing part; 32a, a through hole; 33a, a barrier; 34a, a gap;

40. a plug;

50. an extracorporeal tube; 51. an outer pipe joint; 52. a convex pipe;

60. a positioning sleeve; 61. an outer edge; 62. a socket joint part;

80. a nasogastric tube; 81. a pipe body; 82. a joint; 821. an opening; 83. a plug cover; 84. a right-angled nasogastric tube; 85. a right angle joint; 851. a first channel; 852. a second channel.

Detailed Description

The embodiments of the present invention will be described in more detail with reference to the drawings and reference symbols so that those skilled in the art can implement the embodiments of the present invention after studying the specification.

Fig. 3 and 4 are a perspective view and an exploded perspective view, respectively, of an anti-reflux nasogastric tube according to a first embodiment of the present invention. Referring to fig. 3 and 4, the present invention provides an anti-reflux nasogastric tube, which comprises a tube body 10 and a positioning sleeve 60; the following detailed description is made for each part.

The tube 10 has a first end 11 and a second end 12, the first end 11 has an opening 13, the second end 12 has a hole 14, and the opening 13 and the hole 14 are connected by a pipe 15. Preferably, the tube 10 can be a flexible tube made of elastic plastic or silicone, so as to prevent the tube 10 from damaging the surface tissues of the nasal cavity and the esophagus when being placed in the stomach through the nasal cavity and the esophagus. In the first embodiment of the present invention, the number of the holes 14 of the tube 10 is one, however, the number of the holes 14 is not limited thereto, and the number of the holes 14 may be increased as required.

The positioning sleeve 60 is disposed at the opening 13 and has a sleeve portion 62 and an outer edge 61, the outer edge 61 is located at one end of the sleeve portion 62, preferably, the outer diameter of the outer edge 61 is larger than the inner diameter of the human nostril, so that the positioning sleeve 60 can be clamped in the human nostril.

In the first embodiment of the present invention, the anti-reflux nasogastric tube further comprises an anti-reflux connector 20 disposed at the first end 11 of the tube body 10 and located in the sleeve portion 62, wherein the anti-reflux connector 20 comprises a housing 21 and a non-return assembly 30.

Fig. 5 is a cross-sectional view of an anti-reflux nasogastric tube according to a first embodiment of the present invention. As shown in fig. 5, the housing 21 has a channel 211, the channel 211 has a first through hole 2111, a second through hole 2112 and an accommodating space 2113, and the accommodating space 2113 is communicated between the first through hole 2111 and the second through hole 2112; backstop assembly 30 is disposed in passage 211.

Preferably, one end of the housing 21 is provided with a connecting portion 23, and the connecting portion 23 is used for connecting an integral outer tube 50 (shown in fig. 6 and 7); specifically, the coupling portion 23 is a male screw, and one end of the housing 21 is screwed with an outer pipe joint 51 (shown in fig. 6 and 7) of the outer body pipe 50 (shown in fig. 6 and 7) so that the first through hole 2111 communicates with the outer body pipe 50 (shown in fig. 6 and 7). Preferably, the outer edge 61 of the positioning sleeve 60 is located at one end of the socket 62 and adjacent to the end of the housing 21 having the coupling portion 23.

In the first embodiment of the present invention, the housing 21 further includes a bottom shell 22, the bottom shell 22 has an extension tube 221, the extension tube 221 has a second through hole 2112, and the first end 11 of the tube 10 can be sleeved on the extension tube 221 of the bottom shell 22, so that the second through hole 2112 is communicated with the tube 10.

In the first embodiment of the present invention, the housing 21 further includes a positioning portion 24, the positioning portion 24 is convexly disposed at the middle section of the housing 21, and the outer diameter of the positioning portion 24 is larger than the inner diameter of the sleeve portion 62, so that the sleeve portion 62 is expanded outward by the positioning portion 24 and positioned on the housing 21, thereby achieving the positioning and anti-falling effects of the positioning sleeve 60.

In the first embodiment of the present invention, the backstop assembly 30 comprises a shaft 31 and a spring 32; the shaft portion 31 has a first end 311, a second end 312, an abutting portion 313 and a convex ring 314; the first end 311 of the shaft portion 31 extends into the first through hole 2111, the abutting portion 313 is disposed at the first end 311 of the shaft portion 31 and has at least one through hole 3131, and the protruding ring 314 is disposed between the first end 311 and the second end 312 of the shaft portion 31 and located in the accommodating space 2113; the outer diameter of the protruding ring 314 is larger than the inner diameter of the first through hole 2111, and the outer diameter of the protruding ring 314 is smaller than the inner diameter of the accommodating space 2113, so that the protruding ring 314 can axially move in the accommodating space 2113 and cannot be separated from the housing 21 through the first through hole 2111.

The spring 32 is sleeved on the second end 312 of the shaft portion 31, one end of the spring 32 abuts against the convex ring 314, and the other end abuts against a bottom wall 2114 of the accommodating space 2113; thus, the spring 32 provides a spring force that allows the collar 314 to abut and close the first through hole 2111. Wherein the outer diameter of the spring 32 is larger than the inner diameter of the second through hole 2112, and the outer diameter of the second end 312 of the shaft portion 31 is smaller than the inner diameter of the second through hole 2112.

Preferably, the backstop assembly 30 further comprises a rubber ring 33, the rubber ring 33 is disposed on a side of the convex ring 314 adjacent to the first end 311 of the shaft portion 31, an outer diameter of the rubber ring 33 is larger than an inner diameter of the first through hole 2111, and an inner diameter of the rubber ring 33 is smaller than the outer diameter of the convex ring 314; specifically, the rubber ring 33 is sleeved on the first end 311 of the shaft portion 31 and located in the accommodating space 2113, so that the rubber ring 33 can be located between the protruding ring 314 and the first through hole 2111; preferably, the rubber ring 33 is made of elastic plastic, rubber or silica gel, so that the protruding ring 314 has better sealing and leakage-proof effects when abutting against the first through hole 2111.

Fig. 6 is a schematic view showing the use of the anti-reflux nasogastric tube of the first embodiment of the present invention in connection with an extracorporeal tube. As shown in fig. 6, in the first embodiment of the present invention, when the reverse flow preventing joint 20 is screwed with the outer pipe joint 51 of the outer pipe 50, since the outer pipe joint 51 is screwed with the connecting portion 23 to rotate, a protruding pipe 52 of the outer pipe joint 51 will press against the abutting portion 313, and further press against the abutting portion 313 to move the shaft portion 31 axially downward, and simultaneously compress the spring 32; at this time, the liquid food will pass through the through hole 3131 of the abutting portion 313 and flow into the accommodating space 2113, and since the outer diameter of the second end 312 of the shaft portion 31 is smaller than the inner diameter of the second through hole 2112, a gap is formed between the outer wall of the second end 312 of the shaft portion 31 and the inner wall of the second through hole 2112 for the liquid food to pass through.

Fig. 7 is a schematic view of the anti-reflux nasogastric tube of the first embodiment of the present invention used in a human body. As shown in fig. 7, in the first embodiment of the present invention, the tube body 10 is placed in the stomach through the nasal cavity and the esophagus, and the positioning sleeve 60 is engaged with the nostril of the human body. When the patient wants to eat, the external tube connector 51 of the external tube 50 is connected to the connection portion 23 of the backflow prevention connector 20, so that the liquid food can flow to the tube body 10 through the external tube 50, the external tube connector 51, the first through hole 2111, the accommodating space 2113 and the second through hole 2112 in sequence and enter the stomach of the human body.

When the food is not needed to be fed, the outer tube connector 51 is only required to be removed from the anti-reflux connector 20, and at this time, since no external force is applied to the abutting portion 313, the spring 32 will rebound to enable the convex ring 314 and the rubber ring 33 to re-seal the first through hole 2111, thereby achieving the effects of preventing the food remained in the tube body 10 from flowing backwards and preventing the nasogastric tube from being polluted by the environment.

FIG. 8 is a perspective view of an anti-reflux nasogastric tube according to a second embodiment of the present invention; FIG. 9A is a front view of an anti-reflux nasogastric tube according to a second embodiment of the present invention; fig. 9B is a cross-sectional view of an anti-reflux nasogastric tube of a second embodiment of the present invention. As shown in fig. 8, 9A and 9B, the second embodiment of the present invention is different from the first embodiment in that the structure of a housing 21a and a non-return assembly 30a included in the anti-reverse flow joint 20a is different from that of the first embodiment, and the following detailed description is made for each component.

The housing 21a has a channel 211a, the channel 211a has a first through hole 2111a, a second through hole 2112a and an accommodating space 2113a, and the accommodating space 2113a is communicated between the first through hole 2111a and the second through hole 2112 a; a backstop assembly 30a is disposed in passage 211 a.

Preferably, one end of the housing 21a is provided with a connecting portion 23a, the connecting portion 23a is connected to an outer tube connector 51 of the integrated outer tube 50; specifically, the coupling portion 23a is a male screw for screwing with a female screw of the outer joint 51 of the body outer tube 50.

In the second embodiment of the present invention, the housing 21a further includes a bottom shell 22a having an internal thread 222a and an extension tube 221a, the extension tube 221a has a second through hole 2112a, and when the tube 10 is sleeved on the extension tube 221a, the second through hole 2112a is communicated with the tube 10; it should be noted that the bottom shell 22a of the present invention has internal threads 222a, and can be further screwed with a pipe body (not shown) having an external thread joint at one end.

In the second embodiment of the present invention, check assembly 30a is disposed in passage 211 a; the backstop device 30a has a sealing portion 31a, a through hole 32a and a blocking portion 33 a; the sealing portion 31a is located in the accommodating space 2113a, the through hole 32a penetrates through the sealing portion 31a, the blocking portion 33a is disposed at one end of the sealing portion 31a and located in the first through hole 2111a, and the top of the blocking portion 33a is provided with at least one gap 34 a.

Preferably, the non-return assembly 30a is made of elastic material, such as plastic, rubber or silicone.

FIG. 10A is a front view of the anti-reflux nasogastric tube of the second embodiment of the present invention in connection with the external tube connector 51; fig. 10B is a sectional view showing the connection of the anti-reflux nasogastric tube of the second embodiment of the present invention with the external tube connector 51. As shown in fig. 10A and 10B, in the second embodiment of the present invention, when one end of the housing 21a is screwed with the outer tube connector 51 of the outer tube 50, a protruding tube 52 of the outer tube connector 51 will press on the blocking portion 33a, as shown by the dotted line in fig. 10A. When the outer pipe joint 51 and the connection portion 23a are rotated by screwing, the protruding pipe 52 presses the blocking portion 33a to rotate, and at this time, the slit 34a on the blocking portion 33a is opened by the pressing of the protruding pipe 52.

FIG. 11A is a front view of the anti-reflux nasogastric tube of the second embodiment of the present invention after being connected to the outer tube connector 51; fig. 11B is a cross-sectional view of the anti-reflux nasogastric tube of the second embodiment of the present invention after being connected to the external tube connector 51. As shown in fig. 11A and 11B, when the outer tube connector 51 and the connection portion 23a continue to rotate in a threaded manner, the slit 34a of the blocking portion 33a is completely opened by the rotation of the protruding tube 52 and the pressing of the blocking portion 33a, so that the outer tube 50 is communicated with the through hole 32 a.

In the second embodiment of the present invention, the tube body 10 is placed in the stomach through the nasal cavity and the esophagus, and the positioning sleeve 60 is engaged with the nostril of the human body. When the patient wants to take food, the outer tube connector 51 of the outer tube 50 is connected to the connection portion 23a of the backflow-preventing connector 20a, so that the liquid food flows to the tube body 10 through the outer tube 50, the outer tube connector 51, the through hole 32a and the second through hole 2112a in sequence and enters the stomach of the human body.

When the food is not needed to be infused, the outer tube connector 51 is only needed to be detached from the anti-reflux connector 20a, and at this time, since no external force presses the blocking portion 33a, the pressure blocking portion 33a deformed by the rotation pressure will rebound to the original state, so that the slit 34a is closed again, thereby achieving the effects of preventing the food remained in the tube body 10 from flowing backwards and preventing the nasogastric tube from being polluted by the environment.

It should be noted that in the preferred embodiment of the present invention, the

connection portions

23 and 23a are external threads, however, the

connection portions

23 and 23a may be modified to be internal threads having the same function as required for being screwed with an external thread of the external pipe joint 51 of another external pipe 50.

Fig. 12 is a perspective view of an anti-reflux nasogastric tube according to a third embodiment of the present invention. As shown in fig. 12, in the third embodiment of the present invention, the anti-reflux nasogastric tube further comprises a plug 40, wherein the outer diameter of the plug 40 is smaller than the inner diameter of the positioning sleeve 60, so that the plug 40 can be plugged into the positioning sleeve 60, thereby achieving the effects of preventing the food remained in the positioning sleeve 60 and the tube body 10 from flowing backwards and preventing the nasogastric tube from being polluted by the environment. In the third embodiment of the present invention, the plug 40 is connected to the positioning sleeve 60, however, the arrangement of the plug 40 is not limited to this, and may be separated from the positioning sleeve 60.

In summary, the

anti-reflux joints

20 and 20a are clamped in the nasal cavity of the human body through the positioning sleeve 60, and are not required to be adhered to the cheek of the human body in an adhering manner, so that the discomfort of the patient is reduced, the aesthetic property is improved, and the situation of accidental pulling can be avoided.

Furthermore, by means of the

non-return assemblies

30 and 30a of the

anti-reverse flow connectors

20 and 20a, when the non-return assembly is connected to the outer tube connector 51 for feeding, the passage 211 of the non-return assembly 30 or the through hole 32a of the non-return assembly 30 is automatically opened, and when the non-return assembly is separated from the outer tube connector 51, the passage 211 of the non-return assembly 20 or the through hole 32a of the non-return assembly 20 is automatically closed, so that the effects of preventing the food remained in the tube body 10 from reversely flowing and preventing the nasogastric tube from being polluted by the environment are achieved.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. An anti-reflux nasogastric tube, comprising:

the pipe body is provided with a first end and a second end, the first end is provided with an opening, the second end is provided with at least one hole, and the opening is communicated with the at least one hole through a pipeline; and

the positioning sleeve is arranged at the opening and is provided with a sleeving part and an outer edge, the outer edge is positioned at one end of the sleeving part, and the outer diameter of the outer edge is larger than the inner diameter of the nostril of the human body.

2. The anti-reflux nasogastric tube of claim 1, further comprising an anti-reflux fitting disposed at the first end of said tube body and within said socket; the anti-reflux joint comprises a shell and a non-return component, the shell is provided with a channel, one end of the shell is provided with a connecting part, the connecting part is used for connecting an integrated outer pipe, and the non-return component is arranged in the channel.

3. The anti-reflux nasogastric tube of claim 2, wherein said channel has a first through hole, a second through hole and a receiving space, said receiving space being in communication between said first through hole and said second through hole, said first through hole being for communication with said extracorporeal tube.

4. The anti-reflux nasogastric tube of claim 3, wherein the backstop assembly comprises a shaft portion and a spring, the shaft portion has a first end, a second end, an abutting portion and a collar, the first end of the shaft portion extends into the first through hole, the abutting portion is disposed at the first end of the shaft portion and has at least one through hole, the collar is disposed between the first end and the second end of the shaft portion and located in the receiving space, the outer diameter of the collar is larger than the inner diameter of the first through hole, the outer diameter of the collar is smaller than the inner diameter of the receiving space, the spring is sleeved at the second end of the shaft portion, one end of the spring abuts against the collar, and the other end of the spring abuts against the bottom wall of the receiving space.

5. The anti-reflux nasogastric tube of claim 4, wherein said backstop assembly further comprises a rubber ring, said rubber ring is disposed on a side of said protruding ring adjacent to said first end of said shaft portion, an outer diameter of said rubber ring is larger than an inner diameter of said first through hole, and an inner diameter of said rubber ring is smaller than an outer diameter of said protruding ring.

6. The anti-reflux nasogastric tube of claim 4, wherein said spring has an outer diameter greater than an inner diameter of said second through hole.

7. The anti-reflux nasogastric tube according to claim 3, wherein the non-return assembly has a sealing portion, a through hole and a blocking portion, the sealing portion is located in the accommodating space, the through hole penetrates through the sealing portion, the blocking portion is disposed at one end of the sealing portion and located in the first through hole, and the top of the blocking portion is opened with at least one slit.

8. The anti-reflux nasogastric tube of claim 7, wherein said housing further comprises a bottom shell having an internal thread and an elongated tube having said second through hole.

9. The anti-reflux nasogastric tube of claim 2, wherein the housing further comprises a positioning portion protruding from the middle section of the housing, the outer diameter of the positioning portion being larger than the inner diameter of the socket portion, so that the socket portion is expanded outward by the positioning portion to be positioned in the housing.

10. The anti-reflux nasogastric tube of claim 1, further comprising a plug having an outer diameter smaller than an inner diameter of said positioning sleeve for being disposed in said positioning sleeve.