CN114469745A

CN114469745A - Stomach tube subassembly

Info

Publication number: CN114469745A
Application number: CN202011150379.6A
Authority: CN
Inventors: 田朝阳; 余飞
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2022-05-13

Abstract

A stomach tube subassembly, it includes stomach tube, gasbag, connector and air duct. The stomach tube is provided with a first cavity for supplying nutrition and a second cavity for monitoring pressure, the cavity in the air bag is communicated with the second cavity in a sealing way, and the second cavity is provided with an air interface. The connector is provided with a body and a rigid connecting piece, wherein the body is provided with a first channel and a second channel, the first channel is communicated with the first cavity in a sealing mode, and one end of the second channel is communicated with the second cavity in a sealing mode. One end of the rigid connecting piece extends into the second cavity channel, and the gas channel of the rigid connecting piece is communicated with the second channel in a sealing way. The air duct is communicated with the other end of the second channel in a sealing way, so that the air duct is communicated with the cavity of the air bag in a sealing way. Compared with a capillary tube, the rigid connecting piece is firmer, is not easy to break and leak, and is more reliable in connection of the connector and the stomach tube.

Description

Stomach tube subassembly

Technical Field

The application relates to a medical instrument, in particular to a stomach tube assembly.

Background

In the medical field, patients commonly use a variety of catheters, with a gastric tube being one of many. Gastric tubes are typically inserted from the patient's nasal cavity, through the esophagus and into the patient's stomach to provide the patient with a supply of nutrients or gastrointestinal decompression.

Monitoring the pressure in the esophagus or stomach and calculating parameters therefrom is of great importance in reducing lung damage during mechanical ventilation of a patient. For measuring esophageal or intragastric pressure, a combination of a flexible airway tube and a balloon is often used for pressure measurement purposes.

A stomach tube with an air bag is characterized in that the air bag is adhered to the stomach tube, the stomach tube has the functions of supplying nutrition to the stomach tube and reducing the pressure of the stomach and intestines, and the pressure in the esophagus or the stomach of a human body can be monitored. In order to realize the pressure monitoring function, a gas transmission channel must be established to transmit the air in the air bag to the pressure monitoring equipment outside the human body.

In order to transfer the air in the air sac to the pressure monitoring equipment, the gastric tube is generally provided with a side hole at the position of a side cavity close to the head of the gastric tube, then a capillary tube is inserted into the side cavity, the capillary tube is connected to the side cavity by using an adhesive, and then the capillary tube is connected with an air guide tube through the capillary tube, and the air guide tube is connected with the corresponding pressure monitoring equipment.

However, when the capillary tube is subjected to an external force, the capillary tube is prone to cracking at the bonding position, so that the gas transmission channel leaks gas, and the pressure measurement accuracy is affected.

Disclosure of Invention

The application provides a stomach tube subassembly to a gas channel switching mode in the new stomach tube subassembly is provided.

In accordance with the above purposes, one embodiment provides a gastric tube assembly comprising:

the stomach tube is provided with a first cavity for supplying nutrition and a second cavity for monitoring gas pressure, the first cavity is provided with a nasal feeding interface for inputting nutrition, the second cavity is provided with a gas interface, the wall of the second cavity is provided with a vent hole penetrating to the outer wall of the stomach tube, and the vent hole is communicated with the second cavity;

the air bag covers the outer wall of the stomach tube, and a cavity in the air bag is in sealed communication with the vent;

the connector is provided with a body and a rigid connecting piece, the body is provided with a first channel and a second channel, the first channel is communicated with a nasal feeding interface of the first cavity channel in a sealing mode to form a nasal feeding channel, one end of the second channel is communicated with an air interface of the second cavity channel in a sealing mode, the rigid connecting piece is provided with a through air channel, the rigid connecting piece is arranged in the second channel, one end of the rigid connecting piece extends into the second cavity channel from the air interface, and the air channel is communicated with the second channel in a sealing mode;

and the air duct is communicated with one end of the second channel, which deviates from the second cavity channel, in a sealing manner, so that the air duct is communicated with the cavity of the air bag in a sealing manner, and the air duct is used for being connected with pressure monitoring equipment.

In one embodiment, the number of the second channels is two or more, the number of the second channels of the connector is the same as that of the second channels, one second channel is in sealed communication with one second channel, and a rigid connecting piece is arranged in each second channel.

In one embodiment, the second channel is disposed around the first channel, and the second channel is disposed around the first channel.

In one embodiment, the second channel extends obliquely to the outside of the second channel, the rigid connecting member has a first extending section and a second extending section, the first extending section is located in the second channel, the second extending section is located in the second channel and is obliquely arranged in the same direction as the second channel, and the first channel is located between all the second channel enclosing areas.

In one embodiment, the air duct and one end of the rigid connecting piece departing from the second cavity are directly sealed and fixedly connected, or the air duct and one end of the second channel departing from the second cavity are directly sealed and fixedly connected.

In one embodiment, the diameter of the inner cavity of the airway tube is not smaller than the diameter of the inner cavity of the second channel.

In one embodiment, the rigid connecting member is a metal connecting member or a hard polymer material connecting member.

In one embodiment, the body and the rigid connector are an injection molded integral structure.

In one embodiment, the nasal feeding device further comprises a nasal feeding joint, wherein the nasal feeding joint is in sealed communication with the first channel of the connector.

In one embodiment, the body is provided with a concave assembly cavity, the first channel and the second channel penetrate through the concave surface of the assembly cavity, and one end of the stomach tube extends into the assembly cavity and is in sealed butt joint with the cavity wall of the assembly cavity.

According to the stomach tube assembly shown in the above embodiment, it comprises a stomach tube, a balloon, a connector and an airway tube. The stomach tube is provided with a first cavity for supplying nutrition and a second cavity for monitoring pressure, the cavity in the air bag is communicated with the second cavity in a sealing way, and the second cavity is provided with an air interface. The connector is provided with a body and a rigid connecting piece, wherein the body is provided with a first channel and a second channel, the first channel is communicated with the first cavity in a sealing mode, and one end of the second channel is communicated with the second cavity in a sealing mode. One end of the rigid connecting piece extends into the second cavity channel, and the gas channel of the rigid connecting piece is communicated with the second channel in a sealing way. The air duct is communicated with the other end of the second channel in a sealing way, so that the air duct is communicated with the cavity of the air bag in a sealing way. Compared with a capillary tube, the rigid connecting piece is firmer, is not easy to break and leak, and is more reliable in connection of the connector and the stomach tube.

Drawings

FIG. 1 is a schematic view of a gastric tube assembly according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a gastric tube according to an embodiment of the present application;

FIG. 3 is an enlarged view of a portion of the assembled stomach tube and connector structure of an embodiment of the present application;

FIG. 4 is a schematic view of an airbag according to an embodiment of the present application.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The present embodiment provides a gastric tube assembly. The stomach tube component can enter the stomach of a patient from the nasal cavity of the patient through the esophagus to provide nutrition supply or gastrointestinal decompression for the patient.

Referring to fig. 1-3, in one embodiment, the gastric tube assembly includes a gastric tube 100, a balloon 200, a connector 300, and an airway tube 400.

The gastric tube 100 has a first lumen 110 for nutrient supply and a second lumen 120 for gas pressure monitoring. The first lumen 110 typically extends through the entire gastric tube 100. The first channel 110 has a nasal feeding port for the input of nutrients, which can be connected to external connectors and pipes, etc. to paste food with a grinder under special conditions to form nutrients, and the nutrients are injected into the first channel 110 through the nasal feeding port by a syringe to help patients who cannot swallow autonomously replenish water and food, and maintain metabolism, weight and nutrition in the body. The second channel 120 is one of the gas monitoring channels. This second lumen 120 has a gas interface, and the wall of the second lumen 120 has a vent through to the outer wall of the gastric tube 100, the vent communicating with the second lumen 120.

The balloon 200 covers the outer wall of the gastric tube 100, and may be wrapped around the circumference of the gastric tube 100 or may cover only a portion of the outer wall of the gastric tube 100. The bladder 200 has a chamber therein for inflation that is in sealed communication with a vent for injecting gas into the chamber.

Referring to fig. 1 and 3, the connector 300 is used to interface the gastric tube 100 with other components for adapting. The connector 300 has a body 310 and a rigid connector 320. Wherein the body 310 has a first passage 311 and a second passage 312. The first channel 311 is in sealed communication with the nasogastric interface of the first channel 110 to form a nasogastric channel. One end of the second channel 312 is in sealed communication with the gas interface of the second chamber 120.

The rigid connector 320 can increase the reliability of the connection of the connector 300 to the gastric tube 100. The rigid connector 320 is provided in the second channel 312 and has a gas channel therethrough. One end of the rigid connector 320 extends from the gas port into the second channel 120, which is in sealed communication with the second channel 312. The airway tube 400 is in sealed communication with an end of the second channel 312 that faces away from the second channel 120, such that the airway tube 400 is in sealed communication with the cavity of the balloon 200, and the airway tube 400 is configured to be connected to a pressure monitoring device. The balloon 200 may be inflated via the airway tube 400, such as by injection of gas via a syringe or other gas supply. In addition, airway tube 400 may be used to communicate with an external pressure monitoring device to monitor pressure within balloon 200, and thus obtain and monitor gas pressure in the patient's esophagus and stomach. Referring to fig. 1, when there are more than two air ducts 400, the air ducts 400 can be collected at one position by the adapter 500 and then led out together, which facilitates subsequent docking.

In this embodiment, the rigid connector 320 is more secure than the capillary tube, and is not easy to break or leak, and the connector 300 is more reliably connected to the gastric tube 100, thereby avoiding the occurrence of problems due to inaccurate air pressure detection caused by gas leakage. And a part of the rigid connector 320 extends into the second channel 120, and another part is located in the second channel 312, so that a reinforcing structure can be formed between the gastric tube 100 and the connector 300, and the connection failure caused by the bending of the gastric tube 100 and the connector 300 under pressure can be avoided.

In one embodiment, the rigid connector 320 may be a metal connector made of a metal material or a hard polymer connector made of a hard polymer material. In addition, other materials that can improve the stability of the rigid connector 320 can be used.

Further, the first channel 110 requires nutrients to be infused and therefore has a lumen that is generally larger than the second channel 120. The number of the second channels 120 can be more than one, and the specific number can be determined according to the design and the use requirement of the gastric tube assembly.

Referring to fig. 2, in one embodiment, there are more than two second channels 120. The number of the second channels 312 of the connector 300 is set to be equal to the number of the second channels 120 in order to be respectively communicated with the two or more second channels 120. A second channel 120 is in sealed communication with a second channel 312, and a rigid connector 320 is disposed in each second channel 312.

In the case where there are two or more second channels 120, the second channel 120 may be disposed around the first channel 110 in order to make the gastric tube 100 as thin as possible. And correspondingly, a second channel 312 interfacing with the second channel 120 is also disposed around the first channel 311.

In one embodiment, as shown in fig. 2, the number of the second channels 120 is two, and the two second channels 120 surround the outside of the first channel 110, for example, are symmetrically distributed on two sides of the first channel 110.

Further, since the first channel 311 is a nasal feeding channel, the requirement for the size of the inner cavity is large. In order to ensure the dimensions of the first passageway 311 and the second passageway 312 without enlarging the size of the gastric tube 100, referring to fig. 3, in one embodiment, the second passageway 312 extends obliquely outward of the second lumen 120, so that enough room is left for forming the first passageway 311.

In particular, when there are more than two first channels 311, as shown in fig. 3, the first channels 311 may be located between the enclosed areas of all the second channels 312. The first channel 311 and the second channel 312 do not interfere with each other.

Further, the second channel 312 extends obliquely to the outside of the second channel 120, so that the assembly space of the airway tube 400 is larger, and therefore, in an embodiment, the diameter of the lumen of the airway tube 400 can be set to be not smaller than the diameter of the lumen of the second channel 120, that is, larger than or equal to the diameter of the lumen of the second channel 120, so that the air resistance of the whole airway system can be reduced, the gas inside the balloon 200 can be more easily transmitted to the pressure monitoring device, and the response time of pressure monitoring can be reduced.

Of course, in some embodiments, the diameter of the lumen of airway tube 400 may also be configured to be smaller than the diameter of the lumen of second lumen 120.

To adapt to the extended shape of the first channel 311, referring to fig. 3, in an embodiment, the rigid connection member 320 has a first extension 321 and a second extension 322, the first extension 321 is located in the second channel 120, and the second extension 322 is located in the second channel 312 and is disposed obliquely in the same direction as the second channel 312.

Referring to fig. 3, in one embodiment, the airway tube 400 is directly sealed and fixedly connected to the end of the rigid connector 320 facing away from the second lumen 120. In another embodiment, the airway tube 400 may also be directly sealed and fixedly connected to the end of the second channel 312 facing away from the second channel 120, rather than being directly connected to the rigid connector 320. The fixed connection may be achieved by adhesive or other fixing means, such as a tight fit, welding, etc.

Further, the connector 300 is fixedly connected to the gastric tube 100, and the fixed connection can be achieved by various means such as adhesive, tight fit, welding, etc. The rigid connector 320 and the body 310 may be fixedly connected or may be an injection molded integral structure.

Referring to fig. 3, in one embodiment, the body 310 has a concave assembly cavity 313, and the first channel 311 and the second channel 312 penetrate through the inner concave surface of the assembly cavity 313 (i.e., the inner end surface 314 of the assembly cavity 313). One end of the gastric tube 100 extends into the mounting cavity 313 and sealingly abuts against a cavity wall (e.g., a side wall, an inner end surface 314, etc.) of the mounting cavity 313. The fixed sealing between the gastric tube 100 and the wall of the assembling cavity 313 can be realized by various modes such as adhesive, tight fit, welding and the like.

Further, referring to fig. 1 and 3, in one embodiment, the gastric tube assembly further comprises a nasogastric connector 600, wherein the nasogastric connector 600 is in sealed communication with the first channel 311 of the connector 300. The nasogastric adapter 600 can be used to externally connect tubing or syringes for nasogastric procedures to drive the required nutrients into the gastric tube assembly.

Referring to fig. 1 and 4, on the other hand, in one embodiment, the bladder 200 has an integrally formed bladder 210, and the bladder 210 has a cavity and two oppositely disposed fitting ports 201. This gasbag 200 is integrated into one piece structure, and the surface is smooth, does not have the piece, can avoid the fish tail risk that arouses by the piece, can not damage patient's mucous membrane at the catheterization in-process.

This stomach tube 100 crosses the cavity from assembly port 201, and the inner wall of assembly port 201 and stomach tube 100 outer wall sealing connection, cavity are through air vent and second chamber 120 sealing communication. The gasbag 200 is directly sleeved on the stomach tube 100, and the inner wall of the assembling port 201 on the gasbag body 210 is attached to the axial direction of the outer wall of the stomach tube 100, so that the sealing is easier, the sealing reliability can be improved, and the air leakage risk is greatly reduced.

The inner wall of the assembling port 201 and the gastric tube 100 can be fixed in a sealing manner by an adhesive, or can be fixed in a sealing manner by other manners, such as heat shrinkage treatment, welding, tight fit and the like.

Referring to fig. 1 and 4, in one embodiment, the bladder 210 has an inflation portion 211 and two connection portions 212 at both ends of the inflation portion 211. One fitting opening 201 is provided on each connecting portion 212. The gastric tube 100 extends from the mounting port 201 of the one side connecting portion 212 into the inflation portion 211, passes through the inflation portion 211, and extends from the mounting port 201 of the other side connecting portion 212.

In one embodiment, the dimension of the inflatable portion 211 in the radial direction of the gastric tube 100 is larger than the dimension of the fitting opening 201 on the connecting portion 212. The connecting portion 212 has a smaller diameter and is more easily fit and seal with the outer wall of the gastric tube 100. The diameter of the inflating part 211 is larger, which can satisfy the inflation of gas.

In one embodiment, the inflated portion 211 and the connecting portion 212 are cylindrical, and the diameter of the inflated portion 211 is larger than the diameter of the connecting portion 212.

In one embodiment, the diameter of the mounting port 201 is smaller than the diameter of the outer wall of the gastric tube 100, so that when the gastric tube 100 passes through the balloon 200, the inner wall of the mounting port 201 will be tightly attached to the gastric tube 100. When the balloon 200 is bonded, the two ends are slightly spread apart and then the gastric tube 100 is inserted. Because the diameter of the two ends of the air bag 200 is slightly smaller than that of the gastric tube 100, after the air bag 200 is sleeved on the gastric tube 100, the two ends can be automatically contracted and attached to the outer surface of the gastric tube 100. Then coating the adhesive on the joint for sealing and fixing. This method of assembly can significantly reduce the risk of air leakage from the bladder 200 and is relatively aesthetically pleasing.

Of course, in other embodiments, the diameter of the mounting port 201 may be greater than or equal to the diameter of the outer wall of the gastric tube 100.

Further, in one embodiment, the plurality of vents are arranged along the axial direction of the second chamber 120. The airbag 200 is directly covered over the vent to form communication.

Further, in one embodiment, the bladder 210 is a unitary structure made of a polymer material. The high polymer material has good ductility and is more suitable for inflation.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A gastric tube assembly, comprising:

2. The gastric tube assembly of claim 1 wherein said second channels are two or more, said connector has a number of second channels corresponding to the number of said second channels, one of said second channels is in sealed communication with one of said second channels, and a rigid connector is disposed in each of said second channels.

3. The gastric tube assembly of claim 2 wherein said second passageway is disposed about a first passageway and said second passageway is disposed about said first passageway.

4. The gastric tube assembly of claim 2 wherein said second passageway extends diagonally to the outside of said second passageway, said rigid connection having a first extension and a second extension, said first extension being located within said second passageway, said second extension being located within said second passageway and diagonally co-directional with said second passageway, said first passageway being located between all of said second passageway enclosure regions.

5. The gastric tube assembly of claim 1, wherein said airway tube is directly sealed and fixedly connected to an end of said rigid connector facing away from said second lumen, or said airway tube is directly sealed and fixedly connected to an end of said second passageway facing away from said second lumen.

6. The gastric tube assembly of claim 1 wherein the diameter of the lumen of the airway tube is no less than the diameter of the lumen of the second lumen.

7. The gastric tube assembly of claim 1 wherein said rigid connector is a metal connector or a rigid polymeric material connector.

8. The gastric tube assembly of claim 1 wherein the body and rigid connector are an injection molded unitary structure.

9. The gastric tube assembly of claim 1, further comprising a nasogastric connector in sealed communication with the first passageway of the connector.

10. A gastric tube assembly according to any of claims 1-9 wherein said body has a concave mounting cavity, said first and second passageways extending through the concave inner surface of said mounting cavity, one end of said gastric tube extending into said mounting cavity and sealingly engaging the wall of said mounting cavity.