CN106726615A - A kind of stomach tube and Nasal feeding device - Google Patents

Abstract

The invention provides a gastric tube and a nasal feeding device, which belong to the technical field of medical instruments. The gastric tube includes a gastric tube body, the gastric tube body has an inlet end and an outlet end for extending into the gastric cavity, an umbrella-shaped stopper and a first pressure sensor are arranged on the outside of the gastric tube body, and the umbrella-shaped stopper includes an expansion part With the connection part connected with the stomach tube body, the stomach tube body has a first state in which the expansion part is closed and connects the gastric cavity and the esophagus, and a second state is in which the expansion part is expanded and separates the gastric cavity and the esophagus. The gastric tube can receive the pressure signal in the gastric cavity through the first pressure sensor to control the retraction or deployment of the expansion part, so as to avoid the occurrence of reflux phenomenon. The patient has high comfort when using it, the structure is reasonable in design, compact in mechanism, and has great market application potential. The nasal feeding device includes the aforementioned gastric tube, which has all the functions of the gastric tube.

Description

Gastric tube and nasal feeding device

technical field

The invention relates to the technical field of medical devices, in particular to a gastric tube and a nasal feeding device.

Background technique

Nasogastric tube is also called nasogastric tube, nasogastric tube feeding. The gastric tube is inserted through the nostril, passes through the pharynx, and reaches the stomach through the esophagus. Care should be taken to avoid contamination of the gastric tube and prolapse of the gastric tube, resulting in aspiration.

Gastric intubation is a technique that a clinician must master, and its operational purposes include:

1. Drain the gastrointestinal contents through the gastrointestinal decompression tube, and prepare for abdominal surgery.

2. For patients who cannot take food orally, inject liquid food from the stomach tube to ensure that the patient takes in sufficient nutrition, water and medicine to facilitate early recovery.

The inventor found in research that the traditional gastric tube has at least the following disadvantages:

Esophageal reflux is prone to occur when patients undergo nasal feeding;

The use effect is poor.

Contents of the invention

The purpose of the present invention is to provide a gastric tube that improves the deficiencies of the prior art. It can receive the pressure signal in the gastric cavity through the first pressure sensor to control the retraction or deployment of the expansion part. When the reflux situation is about to occur , The expansion part is deployed to isolate the esophagus and gastric cavity, preventing the fluid in the gastric cavity from entering the esophagus, and avoiding the occurrence of reflux. The overall use effect is better, the patient has a higher degree of comfort when using it, the structure design is reasonable, the mechanism is compact, and the market application potential is huge.

Another object of the present invention is to provide a nasal feeding device, which includes the above-mentioned gastric tube, which has all the functions of the gastric tube.

Embodiments of the present invention are achieved like this:

An embodiment of the present invention provides a gastric tube, which includes a gastric tube body, the gastric tube body has an inlet end and an outlet end for extending into the gastric cavity, an umbrella-shaped stopper and a first The pressure sensor, the umbrella-shaped stopper includes an expansion part and a connecting part connected with the gastric tube body, the gastric tube body has a first state in which the expansion part is folded and the gastric cavity and the esophagus are communicated, and the expansion part is expanded to separate the gastric cavity and the esophagus In the second open state, the first pressure sensor is located between the stopper and the outlet port, and the first pressure sensor is used to detect the pressure in the gastric cavity and control the expansion part to fold or expand.

Specifically, the stomach tube can receive the pressure signal in the gastric cavity through the first pressure sensor to control the retraction or expansion of the expansion part. When the reflux situation is about to occur, the expansion part is expanded to isolate the esophagus and the gastric cavity, preventing gastric cavity The fluid in the esophagus enters the esophagus, avoiding the occurrence of reflux. The overall use effect is better, the patient has a higher degree of comfort when using it, the structure design is reasonable, the mechanism is compact, and the market application potential is huge.

Optionally, a valve is provided inside the gastric tube body, and the valve has a third state in which fluid flows unidirectionally from the inlet end to the outlet end, and a fourth state in which fluid flows bidirectionally in the gastric tube body.

Optionally, the valve is located between the stopper and the outlet end and is closer to the stopper relative to the outlet end.

Optionally, a control part is further provided on the outside of the stomach tube body, and the control part receives the signal from the first pressure sensor and controls the valve to be in the third state or the fourth state.

Optionally, a control part is further provided on the outside of the gastric tube body, and the control part receives a signal from the first pressure sensor and controls the expansion part to collapse or expand.

Optionally, the control part is located between the connection part and the inlet end and is close to the connection part relative to the inlet end, and the gastric tube further includes an external switch for controlling the control part to be turned on or off.

Optionally, a second pressure sensor is provided on the outside of the gastric tube body, and the second pressure sensor is located between the inlet end and the stopper and is used to detect the pressure in the esophagus.

Optionally, a pH sensor is also provided on the outside of the stomach tube body, the pH sensor is located between the inlet end and the stopper and is used to detect the pH in the esophagus, the number of the pH sensor is the same as the number of the second pressure sensor One, the pH sensor and the second pressure sensor are arranged alternately.

Optionally, the gastric tube further includes a detection part, the detection part is provided with an indicator light, and the detection part receives signals from the pH sensor and the second pressure sensor and controls the indicator light to turn on or off.

An embodiment of the present invention also provides a nasal feeding device, which includes the above-mentioned gastric tube, which has all the functions of the gastric tube.

Compared with the prior art, the beneficial effects of the embodiments of the present invention are:

To sum up, the gastric tube can receive the pressure signal in the gastric cavity through the first pressure sensor to control the retraction or expansion of the expansion part. When the reflux situation is about to occur, the expansion part will be expanded to isolate the esophagus and gastric cavity, preventing The fluid in the gastric cavity enters the esophagus, avoiding the occurrence of reflux. The overall use effect is better, the patient has a higher degree of comfort when using it, the structure design is reasonable, the mechanism is compact, and the market application potential is huge.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the first gastric tube provided in Embodiment 1 of the present invention inside a human body;

Fig. 2 is a schematic diagram of the unfolded state of the unfolding part of the first gastric tube shown in Fig. 1;

Fig. 3 is a schematic diagram of the unfolded part of the first gastric tube shown in Fig. 1 in a folded state;

Fig. 4 is a schematic diagram of a second gastric tube provided by Embodiment 2 of the present invention.

Icons: 100-gastric tube; 11-gastric tube body; 101-inlet end; 102-outlet end; 111-stopper; 1111-connection; 1113-expansion; - valve; 117 - control part; 118 - second pressure sensor; 119 - pH sensor; 13 - external switch; 15 - detection part; 20 - esophagus; 30 - cardia; 40 - stomach; 41 - gastric cavity.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer" etc. is based on the orientation or positional relationship shown in the drawings, or the The usual orientation or positional relationship of the invention product in use is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or an optional connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example 1

Please refer to FIG. 1 , this embodiment provides a gastric tube 100 , which includes a gastric tube body 11 having an inlet end 101 and an outlet end 102 for extending into the gastric cavity 41 .

The gastric tube 100 passes through the nostrils, passes through the pharynx, and passes through the esophagus 20 to reach the stomach 40. The stomach 40 has a gastric cavity 41 for containing and digesting liquid food. After the gastric tube 100 is installed, the outlet end 102 is located in the gastric cavity 41 , the liquid food enters the gastric tube body 11 through the inlet port 101 , and finally enters the gastric cavity 41 through the outlet port 102 .

The junction of the esophagus 20 and the stomach 40 is the cardia 30 .

The cardia 30 is a part of the human or animal digestive tract, and is the interface between the esophagus 20 and the stomach 40 . Food in the esophagus enters the stomach through the cardia 30 . Cardia 30 has muscles that can stretch and contract, preventing food and gastric acid that enter the stomach from flowing back into the esophagus. Relaxation of the cardia 30 leads to erosion and inflammation of the esophagus.

Please refer to FIG. 2 and FIG. 3 , an umbrella-shaped stopper 111 and a first pressure sensor 113 are provided on the outside of the gastric tube body 11. The umbrella-shaped stopper 111 includes an expansion part 1113 and a connecting part 1111 connected with the gastric tube body 11. The tube body 11 has a first state in which the expansion part 1113 is closed and communicates the gastric cavity 41 and the esophagus 20, and a second state in which the expansion part 1113 is expanded and separates the gastric cavity 41 and the esophagus 20, and the first pressure sensor 113 is located at the stopper Between 111 and the outlet port 102 , the first pressure sensor 113 is used to detect the pressure in the gastric cavity 41 and control the expansion part 1113 to collapse or expand.

Optionally, there are multiple first pressure sensors 113 , and the first pressure sensors 113 are distributed within a range of 0-8 cm near the outlet end 102 of the gastric tube body 11 .

Optionally, the number of the first pressure sensors 113 is 6 or 8.

Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools , pipelines and many other industries, as well as medical pressure sensors.

Medical pressure sensor is a special medical pressure sensor. That is, a sensor for special medical use that can sense pressure and convert it into a usable output signal. (And because the commonly used pressure sensors are mainly manufactured using the piezoelectric effect, pressure sensors can also be called piezoelectric sensors.)

Optionally, the connecting portion 1111 of the stopper 111 is located 10 cm away from the outlet end 102 of the gastric tube body 11 . When the gastric tube 100 is placed inside the human body, the connecting part 1111 is located at the cardia 30 between the esophagus 20 and the stomach 40. When the unfolding part 1113 of the stopper 111 is in the unfolded state, the stopper 111 connects the esophagus 20 and the gastric cavity 41 partition, the barrier effect is better, the patient has no obvious discomfort, and the overall use effect is better.

What needs to be explained here is that brackets 1115 are distributed on the expansion part 1113. When it needs to be expanded, the stopper 111 will expand the expansion part 1113 under the support of the brackets 1115 to form an umbrella-like structure. The effect is better.

Specifically, the gastric tube 100 can receive the pressure signal in the gastric cavity 41 through the first pressure sensor 113 to control the retraction or deployment of the expansion part 1113. When the reflux situation is about to occur, the expansion part 1113 is expanded to isolate the esophagus 20 and the The gastric cavity 41 prevents the fluid in the gastric cavity 41 from entering the esophagus 20 and avoids the occurrence of reflux. The overall use effect is better, the patient has a higher degree of comfort when using it, the structure design is reasonable, the mechanism is compact, and the market application potential is huge.

Optionally, a valve 115 is provided inside the gastric tube body 11 , and the valve 115 has a third state in which fluid flows unidirectionally from the inlet port 101 to the outlet port 102 , and a fourth state in which fluid flows bidirectionally in the gastric tube body 11 .

Fluid here is liquid food, also can be other liquids.

During normal nasal feeding, the valve 115 is in the fourth state, and liquid food passes through the gastric tube body 11, and flows into the gastric cavity 41 from the outlet port 102; when the reflux state is expected to occur, the valve 115 is in the third state, and the fluid It can flow in one direction. The valve 115 is similar to a one-way valve. Liquid food can only flow from the inlet port 101 to the outlet port 102 through the gastric tube body 11, and the liquid food in the gastric cavity 41 cannot flow back. Can significantly reduce the patient's discomfort.

Optionally, the valve 115 is located between the stopper 111 and the outlet port 102 and is closer to the stopper 111 relative to the outlet port 102 .

When the valve 115 is at the position close to the outlet end 102 of the gastric tube body 11, no matter whether it is normal nasal feeding or reflux, the patient does not feel any obvious discomfort, and the overall use effect is better.

It should be noted here that the valve 115 can also be located between the stopper 111 and the outlet end 102 and is closer to the outlet end 102 relative to the stopper 111 .

Optionally, a control part 117 is further provided on the outside of the gastric tube body 11, and the control part 117 receives a signal from the first pressure sensor 113 and controls the valve 115 to be in the third state or the fourth state.

The control part 117 is located between the inlet port 101 and the connecting part 1111 and is close to the connecting part 1111 relative to the inlet port 101. The control part 117 is used to receive the signal sent by the first pressure sensor 113 and determine whether a reflux situation is about to occur. When judging When the reflux phenomenon is about to occur, the control part 117 controls the valve 115 to be in the third state. At this time, the valve 115 is equivalent to a one-way valve, and the liquid food in the gastric cavity 41 cannot flow to the inlet port 101 through the gastric tube body 11 to avoid reflux occurs.

Optionally, a control part 117 is further provided on the outside of the gastric tube body 11, and the control part 117 receives a signal from the first pressure sensor 113 and controls the expansion part 1113 to collapse or expand.

The control part 117 is located between the inlet port 101 and the connecting part 1111 and is close to the connecting part 1111 relative to the inlet port 101. The control part 117 is used to receive the signal sent by the first pressure sensor 113 and determine whether a reflux situation is about to occur. When judging When the reflux phenomenon is about to occur, the control part 117 controls the expansion part 1113 to be in the unfolded state, so that the esophagus 20 and the gastric cavity 41 are in an isolated state, so as to prevent the liquid food in the gastric cavity 41 from flowing to the esophagus 20 through the cardia 30 . The overall effect is better.

What needs to be explained here is that, in a specific implementation, the control unit 117 controls the stopper 111 and the valve 115 at the same time. In the expanded state, the valve 115 is in the third state, and the two work simultaneously to avoid backflow phenomenon. The patient has no obvious discomfort, and the overall effect is better.

Optionally, the control part 117 is located between the connection part 1111 and the inlet end 101 and is close to the connection part 1111 relative to the inlet end 101. The gastric tube 100 also includes an external switch 13 for controlling the control part 117 to open or close.

What needs to be explained here is that under normal circumstances, the external switch 13 is in the closed state, the expansion part 1113 is in the retracted state, the valve 115 is in the fourth state, liquid food can enter the gastric cavity 41 normally, and the gastric cavity 41 and the esophagus 20 are also in communication. state. When it is predicted that reflux is about to occur, the external switch 13 is turned on to make the control unit 117 in a standby state. When the first pressure sensor 113 detects that the pressure in the gastric cavity 41 is abnormal and reflux is about to occur, the first The pressure sensor 113 feeds back the signal to the control part 117, and the control part 117 automatically activates the stopper 111 and the valve 115, so that the expansion part 1113 is expanded, and the valve 115 is in the third state, so as to prevent the liquid food in the gastric cavity 41 from flowing back through the cardia 30 And reflux through the stomach tube body 11. The overall effect is better, greatly reducing the patient's discomfort.

Example 2

Please refer to FIG. 4 , this embodiment also provides a stomach tube 100 , the technical solution described in embodiment 1 is also applicable to this embodiment, and the technical solution disclosed in embodiment 1 will not be described again.

What is shown in FIG. 4 is that the unfolding part 1113 of the gastric tube 100 is in an unfolded state.

Specifically, the difference between this embodiment and Embodiment 1 is that a second pressure sensor 118 is provided on the outside of the gastric tube body 11, and the second pressure sensor 118 is located between the inlet end 101 and the stopper 111 and is used to detect the pressure of the esophagus. Pressure within 20.

When the gastric tube body 11 is placed inside the human body, the second pressure sensor 118 is located in the esophagus 20 of the human body.

Optionally, a pH sensor 119 is also provided on the outside of the gastric tube body 11. The pH sensor 119 is located between the inlet end 101 and the stopper 111 and is used to detect the pH in the esophagus 20. The number of the pH sensors 119 and the second pressure sensor The number of 118 is the same and all are plural, and the pH sensors 119 and the second pressure sensors 118 are arranged alternately.

Optionally, the pH sensor 119 and the second pressure sensor 118 are located within the range of 15-30 cm from the outlet end 102 of the gastric tube body 11, the pH sensors 119 and the second pressure sensors 118 are evenly distributed and staggered, and the detection sensitivity higher.

Optionally, the number of the pH sensor 119 and the second pressure sensor 118 are both 6 or 8.

The pH sensor 119 is a sensor used to detect the hydrogen ion concentration in the measured object and convert it into a corresponding usable output signal.

What needs to be mentioned here is that the first pressure sensor 113 , the pH sensor 119 and the second pressure sensor 118 mentioned above can be installed on the outside of the stomach tube body 11 , or can be arranged around the outside of the stomach tube body 11 .

Optionally, the gastric tube 100 further includes a detection part 15, the detection part 15 is provided with an indicator light, and the detection part 15 receives signals from the pH sensor 119 and the second pressure sensor 118 and controls the indicator light to turn on or off.

The detection part 15 detects the pH value and pressure value in the esophagus 20 of the human body, and judges whether the reflux phenomenon is about to occur through the pH value or the pressure value.

According to a gastric tube 100 provided in an embodiment of the present invention, the working principle of the gastric tube 100 is:

Under normal circumstances, the pH value in the human esophagus 20 is 5-7, the pH value in the gastric cavity 41 is 0.9-1.5, the pressure value in the esophagus 20 at rest is 10-30mmHg, and the pressure ratio in the gastric cavity 41 is Less than 5-10mmHg in the esophagus 20.

When the patient has clinical conditions such as severe cough, nausea, vomiting, muscle spasm, or neurological reasons after brain damage, the patient may experience gastric pressure exceeding 20 pressure in the esophagus, regurgitation of gastric contents and swallowing, and eventually lead to pulmonary Infect. When the patient has reflux of gastric content, the pH value in the esophagus 20 will drop to 4 o'clock or below, and the pressure in the esophagus 20 will also drop to 13.1±6.7mmHg.

When the detection part 15 detects that the pH in the esophagus 20 drops to 4 or below through the pH sensor 119, or detects that the pressure in the esophagus 20 drops to 10 mmHg or below through the second pressure sensor 118, the indicator light will light up to remind the staff, The patient has developed regurgitation.

When the patient has clinical conditions such as severe cough, nausea, vomiting, muscle spasm, or neurological reasons after brain damage, the pressure in the patient's gastric cavity 41 will increase, and when it reaches and exceeds the pressure in the esophagus 20, reflux will occur .

When the pressure in the patient's gastric cavity 41 is greater than or equal to 30mmHg, the first pressure sensor 113 transmits a signal to the control part 117, and the control part 117 realizes the anti-reflux effect by controlling the stopper 111 and the valve 115.

When the pressure in the gastric cavity 41 drops to 30mmHg or below, the control part 117 controls the expansion part 1113 to close, so that the valve 115 is in the fourth state, reaching a normal state.

According to a gastric tube 100 provided in an embodiment of the present invention, the working process of the gastric tube 100 is:

Step 1: Make the unfolding part 1113 in a folded state, and the unfolding part 1113 fits the gastric tube body 11;

Step 2: Insert the outlet end 102 of the gastric tube 100 into the nostril of the patient, and then pass through the pharynx, esophagus 20 and cardia 30 to reach the gastric cavity 41;

Step 3: After the gastric tube 100 is placed, the connecting part 1111 is located near the cardia 30;

Step 4: The unfolding part 1113 is in the folded state, the valve 115 is in the fourth state, and the normal nasal feeding work is performed;

Step 5: When the detection part 15 detects that the pH in the esophagus 20 has dropped to 4 or below or the pressure value has dropped to 10mmHg or below, the indicator light will emit light and give an alarm. , body position and the relationship with medical care behaviors are monitored to provide evidence for clinical medical care behaviors;

Step 6: When it is determined that there is backflow, turn on the external switch 13, so that the control unit 117 is in a standby state;

Step 7: When the control part 117 detects that the pressure in the gastric cavity 41 has risen to 30mmHg or above, it controls the stopper 111 and the valve 115, so that the expansion part 1113 of the stopper 111 is expanded, and the valve 115 is in the third state. 41 is separated from the esophagus 20;

Step 8: When the control part 117 detects that the pressure in the gastric cavity 41 has dropped to 30mmHg or below, it controls the stopper 111 and the valve 115, so that the expansion part 1113 of the stopper 111 is closed, and the valve 115 is in the fourth state, so that the gastric cavity 41 communicates with the esophagus 20 for normal nasal feeding.

What needs to be explained here is that the gastric tube 100 also has the functions of monitoring and controlling reflux after completing the basic nasal feeding work, and can also detect the effect of control. The overall use effect is better and the market application potential is huge.

Example 3

This embodiment also provides a nasal feeding device, which includes the aforementioned gastric tube 100 and has all the functions of the gastric tube 100 . The structure of gastric tube 100 can refer to Embodiment 1 or 2.

The nasal feeding device also includes a detection instrument, which is used to detect and control the external switch 13 and the detection part 15 . Realize the effect of automatic control.

To sum up, the present invention provides a gastric tube 100, which can receive the pressure signal in the gastric cavity 41 through the first pressure sensor 113 to control the retraction or expansion of the expansion part 1113. When the reflux situation is about to When it occurs, the expansion part 1113 is expanded to isolate the esophagus 20 and the gastric cavity 41, preventing the fluid in the gastric cavity 41 from entering the esophagus 20, and avoiding the reflux phenomenon. The overall use effect is better, the patient has a higher degree of comfort when using it, the structure design is reasonable, the mechanism is compact, and the market application potential is huge.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of stomach tube, it is characterised in that including stomach tube body, the stomach tube body has entrance point and for stretching into gastral cavity The port of export, be provided with umbrella block piece and first pressure sensor on the outside of the stomach tube body, the umbrella block piece includes exhibition Portion and the connecting portion being connected with the stomach tube body are opened, the stomach tube body there is the expanding unit to draw in and makes gastral cavity and esophagus The first state of connection, and the second state that the expanding unit is launched and separates gastral cavity and esophagus, the first pressure are passed Sensor is located between the block piece and the port of export, and the first pressure sensor is used to detect pressure and the control in gastral cavity Draw in or launch in the expanding unit.

2. stomach tube according to claim 1, it is characterised in that the stomach tube body is internally provided with valve, the valve Door is two-way in the stomach tube body with the third state of the fluid from the entrance point one-way flow to the port of export, and fluid 4th state of flowing.

3. stomach tube according to claim 2, it is characterised in that the valve is located between the block piece and the port of export And relative to the port of export near the block piece.

4. stomach tube according to claim 2, it is characterised in that be additionally provided with control unit on the outside of the stomach tube body, institute Control unit is stated to receive signal that the first pressure sensor sends and control the valve to be in the third state or described 4th state.

5. stomach tube according to claim 1, it is characterised in that be additionally provided with control unit on the outside of the stomach tube body, institute Control unit is stated to receive signal that the first pressure sensor sends and control the expanding unit to draw in or launch.

6. the stomach tube according to claim 4 or 5, it is characterised in that the controlling position in the connecting portion with it is described enter Near the connecting portion between mouth end and relative to the entrance point, the stomach tube also includes outside connected switch, the outside connected switch For controlling the control unit to open or close.

7. the stomach tube according to claim any one of 1-5, it is characterised in that also set up also on the outside of the stomach tube body Second pressure sensor, the second pressure sensor is located between the entrance point and the block piece and for detecting in esophagus Pressure.

8. stomach tube according to claim 7, it is characterised in that be additionally provided with pH sensors on the outside of the stomach tube body, The pH sensors are located between the entrance point and the block piece and for detecting the pH in esophagus, the number of the pH sensors Amount is identical with the quantity of the second pressure sensor and is multiple, and the pH sensors and the second pressure sensor are handed over Mistake is set.

9. stomach tube according to claim 8, it is characterised in that the stomach tube also includes test section, the test section is set There is indicator lamp, the signal that the test section receiving pH sensors and the second pressure sensor send simultaneously controls indicator lamp Open or close.

10. a kind of Nasal feeding device, it is characterised in that including the stomach tube described in claim any one of 1-9.