CN114469744A

CN114469744A - Stomach tube subassembly

Info

Publication number: CN114469744A
Application number: CN202011149077.7A
Authority: CN
Inventors: 余飞; 田朝阳
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

In a gastric tube assembly, it includes a gastric tube, a balloon and a syringe. The gastric tube has a first lumen and a second lumen. The air bag covers the outer wall of the stomach tube and is communicated with the second cavity in a sealing way. The injector is used for injecting gas into the second cavity so as to inflate the air bag. Wherein the limited volume of the air bag is larger than or equal to the air bag with the maximum gas injection amount injected by the injector at one time. Therefore, the user can inject gas by the injector more conveniently, and the injection amount at one time does not exceed the limited volume of the air bag, so that the problem of over-expansion of the air bag caused by over-injection of gas can be reduced, and the accuracy of pressure monitoring is improved.

Description

Stomach tube subassembly

Technical Field

The application relates to a medical instrument, in particular to an air bag structure of 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 the stomach tube, in order to monitor the pressure, a part of gas needs to be filled in the air bag, when the air bag is positioned in the esophagus or the stomach of a human body, the pressure in the air bag is equal to the pressure outside the air bag, namely the pressure in the esophagus or the stomach, because the pressure inside and outside the air bag is balanced. Generally, when performing pressure measurement, a syringe is used to inject a certain amount of air into the balloon, but the balloon cannot be completely filled. However, it is difficult to control the injection amount by manually injecting air using a syringe, and the bladder is often over-inflated, has surface tension, and cannot be measured for pressure.

Disclosure of Invention

The application provides a novel stomach tube subassembly to improve the convenience that the user pours into gas into in to the gasbag.

In accordance with the above purpose, there is provided in one embodiment of the present application a gastric tube assembly comprising:

the stomach tube is provided with a first cavity for supplying nutrition and a second cavity for detecting 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;

and an inflator for injecting gas into the second chamber to inflate the airbag;

wherein the defined volume of the airbag is greater than or equal to the maximum gas injection amount of one injection of the inflator.

In one embodiment, the defined volume of the balloon is less than or equal to 5 times the maximum gas inflow of one injection from the inflator.

In one embodiment, the defined volume of the balloon is greater than or equal to 1.25 times the maximum gas inflow of one injection from the inflator.

In one embodiment, the defined volume of the balloon is 1mL, 5mL, 10mL, or 20 mL.

In one embodiment, the maximum inflow of gas for one injection of the inflator is 1mL, 5mL, 10mL, or 20 mL.

In one embodiment, the inflation device comprises a syringe.

The utility model provides an in the embodiment, still include connector and air duct, the connector has body and rigid connection spare, the body has first passageway and second passageway, first passageway with the nasal feeding interface of first chamber way seals the intercommunication to form the nasal feeding passageway, the one end of second passageway with the gas interface of second chamber way seals the intercommunication, rigid connection spare has the gas passage who link up, rigid connection spare is located the second passageway, just rigid connection spare's one end is followed the gas interface stretches into in the second chamber way, the gas passage with the sealed intercommunication of second passageway.

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.

In one embodiment, the balloon has an integrally formed balloon body, the balloon body has a cavity and two oppositely disposed assembling ports, the stomach tube traverses the cavity from the assembling ports, the port wall of the assembling ports is connected with the outer wall of the stomach tube in a sealing manner, and the cavity is communicated with the second cavity in a sealing manner through the vent hole.

In one embodiment, the fitting opening has a diameter smaller than the diameter of the gastric tube outer wall.

In one embodiment, the balloon body is provided with an inflation part and two connecting parts positioned at two ends of the inflation part, each connecting part is provided with one assembling port, and the stomach tube extends into the inflation part from the assembling port of the connecting part at one side, penetrates through the inflation part and extends out from the assembling port of the connecting part at the other side; the inflatable part and the connecting part are both cylindrical, and the diameter of the inflatable part is larger than that of the connecting part.

the air bag covers the outer wall of the stomach tube, a cavity in the air bag is in sealed communication with the vent, and the limited volume of the air bag is 1.25-5 times of the standard specification of the syringe; the injector is used for injecting gas into the second cavity so as to inflate the air bag.

In one embodiment, the syringe standard size is 1mL, 5mL, 10mL, or 20 mL.

In the gastric tube assembly according to the above embodiment, it includes a gastric tube, a balloon and a syringe. The gastric tube has a first lumen and a second lumen. The air bag covers the outer wall of the stomach tube and is communicated with the second cavity in a sealing way. The injector is used for injecting gas into the second cavity so as to inflate the air bag. Wherein the limited volume of the air bag is larger than or equal to the air bag with the maximum gas injection amount injected by the injector at one time. Therefore, the user can inject gas by the injector more conveniently, and the injection amount at one time does not exceed the limited volume of the air bag, so that the problem of over-expansion of the air bag caused by over-injection of gas can be reduced, and the accuracy of pressure monitoring is improved.

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 a schematic diagram of the structure of a syringe according to an embodiment of the present application;

FIG. 4 is a schematic view of the construction of an air bag according to an embodiment of the present application;

fig. 5 is an enlarged view of a portion of the assembled structure of the gastric tube and the connector 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 ordinal numbers used herein for the components, such as "first," "second," etc., are used merely to distinguish between the objects described, and do 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).

Referring to fig. 1-3, in one embodiment, the gastric tube assembly includes a gastric tube 100, a balloon 200, and an inflation device.

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.

The inflator is used to inject gas into the second chamber to inflate the airbag 200. In order to improve the convenience and efficiency of gas injection by the user, in the present embodiment, the defined volume of the airbag 200 is greater than or equal to the maximum gas injection amount of one injection of the inflator. The limited volume is the maximum amount of gas that the balloon 200 can accommodate while ensuring that no tension is placed on the surface of the balloon 200 when the balloon 200 is in the esophagus or stomach. Thus, the user can inject air more conveniently by using the inflator, the change of the air bag 200 does not need to pay much attention, the air injected at one time can only be equal to or less than the limited volume of the air bag 200, the problem of over expansion of the air bag 200 caused by over injection of air can be reduced, and the accuracy of pressure monitoring is improved. The inflation device may include, but is not limited to, a syringe 700.

The inventor finds that the gas quantity injected into the air bag 200 is 0.2-0.8 times of the limited volume of the air bag 200 through repeated research and experiments, and the gas pressure monitoring accuracy is good. Thus, in one embodiment, the defined volume of the bladder 200 is less than or equal to 5 times the maximum gas inflow for a single injection from the inflator. Thus, the gas quantity injected by the inflator at one time is more than or equal to 0.2 times of the limited volume of the airbag 200, so as to obtain better monitoring effect.

In another embodiment, on the basis that the defined volume of the airbag 200 is less than or equal to 5 times of the maximum gas inflow amount injected by the inflator at one time, the defined volume of the airbag 200 may be greater than or equal to 1.25 times of the maximum gas inflow amount injected by the inflator at one time. Therefore, the gas quantity injected by the inflator at one time can be between 0.2 and 0.8 times of the limited volume of the airbag 200, and the monitoring accuracy is further improved.

To accommodate the maximum gas injection volume of various inflators, in one embodiment, the defined volume of the bladder 200 is 1mL, 5mL, 10mL, or 20 mL. The airbag 200 is used in combination with an inflator having a maximum gas injection amount of 1mL, 5mL, 10mL, or 20mL for one injection. Taking the syringe 700 as an example, in one embodiment, the syringe 700 is 1mL, 5mL, 10mL or 20mL in standard specification.

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 air bag 200 is directly sleeved on the gastric tube 100, and the inner wall of the assembling port 201 on the bag body 210 is attached to the axial direction of the outer wall of the gastric 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.

Referring to fig. 1-5, in another embodiment, the gastric tube assembly further comprises a connector 300 and an airway tube 400.

Referring to fig. 1 and 5, 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 700 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.

As shown in fig. 2, in one embodiment, 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 both 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. 5, 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. 5, 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 300 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. 5, 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. 5, 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. 5, 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 5, 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 syringe 700 for nasogastric procedures to drive the required nutrients into the gastric tube assembly.

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 balloon has a defined volume less than or equal to 5 times the maximum gas inflow for one injection of said inflatable device.

3. The gastric tube assembly of claim 2 wherein said balloon has a defined volume greater than or equal to 1.25 times the maximum gas inflow for one injection of said inflatable device.

4. The gastric tube assembly of claim 1, wherein said balloon defines a volume of 1mL, 5mL, 10mL or 20 mL.

5. The gastric tube assembly of claim 1 wherein said inflatable device has a maximum inflow of gas of 1mL, 5mL, 10mL or 20mL per injection.

6. The gastric tube assembly of claim 1 wherein said inflation device comprises a syringe.

7. A gastric tube assembly according to any one of claims 1 to 6 further comprising a connector and an airway tube, said connector having a body and a rigid connector, said body having a first channel and a second channel, said first channel being in sealed communication with said nasogastric port of said first lumen to form a nasogastric channel, one end of said second channel being in sealed communication with said gas port of said second lumen, said rigid connector having a gas channel therethrough, said rigid connector being disposed in said second channel and one end of said rigid connector extending from said gas port into said second lumen, said gas channel being in sealed communication with said second channel.

8. The gastric tube assembly of claim 7 wherein said body has a concave mounting cavity, said first and second passageways extending through the concave interior 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.

9. A gastric tube assembly according to any of claims 1-6 wherein said balloon has an integrally formed balloon having a cavity and two oppositely disposed fitting ports through which said gastric tube traverses said cavity, the port walls of said fitting ports being in sealed connection with the outer wall of said gastric tube, said cavity being in sealed communication with said second lumen via said vent.

10. The gastric tube assembly of claim 9 wherein said fitting port has a diameter less than a diameter of an outer wall of said gastric tube.

11. A gastric tube assembly according to claim 9, wherein said balloon has an inflatable portion and two connection portions at both ends of the inflatable portion, one of said mounting ports being provided on each connection portion, said gastric tube extending into the inflatable portion from the mounting port of one connection portion, through said inflatable portion, and out from the mounting port of the other connection portion; the inflatable part and the connecting part are both cylindrical, and the diameter of the inflatable part is larger than that of the connecting part.

12. A gastric tube assembly, comprising:

13. The gastric tube assembly of claim 12 wherein said syringe is 1mL, 5mL, 10mL or 20mL in standard format.