CN111481236A - Alimentary canal liquid biopsy sampling device for internal medicine - Google Patents

Abstract

The invention relates to a medical digestive tract liquid biopsy sampling device in the medical field, comprising a needle tube, the needle tube is provided with a cap, the cap is provided with a push rod, the push rod is provided with a first piston, the needle tube is provided with a connecting tube, and the connecting tube is provided with a second one-way valve , The connecting tube has a cover plate, the cover plate has a liquid accumulation bucket, the needle tube has a middle tube, the middle tube has a first one-way valve, the middle tube has a straight tube, the straight tube has a T-shaped push rod, and the T-shaped push rod has a reset structure. The reset structure is connected with a blocking cylinder, the blocking cylinder has a sleeve, and the sleeve is threadedly connected with the intermediate pipe, and the blocking cylinder and the sleeve have through holes. The connecting rope moves, the connecting rope drives the blocking cylinder to move through the straight rod, and drives the solid part of the blocking cylinder to move to the through hole of the sleeve to block the through hole of the sleeve, and it is convenient to block the through hole of the sleeve after sampling. so that the liquid in other parts will not enter the sampling device when the sleeve moves, which ensures the correctness of sampling and makes the inspection more accurate.

Description

A kind of internal medicine digestive tract liquid biopsy sampling device

technical field

The invention relates to the medical field, in particular to a liquid biopsy sampling device of the digestive tract for internal medicine.

Background technique

The digestive tract is a long muscular tube that starts from the mouth and continues into the pharynx, esophagus, stomach, small intestine, large intestine, and finally the anal canal, including the mouth, pharynx, esophagus, stomach, small intestine, duodenum, jejunum, ileum, and large intestine The cecum, appendix, colon, rectum and anal canal. There are two types of digestive glands: small digestive glands and large digestive glands. The small digestive glands are scattered in the walls of each part of the digestive tract. The large digestive glands have three pairs of salivary glands, parotid glands, submandibular glands, sublingual glands, liver and pancreas. They all use catheters to discharge secretions into the digestive canal.

Digestive tract biopsy technology is of great significance for the diagnosis of gastrointestinal diseases. Gastroenterology patients have problems with the digestive tract system, which affect the normal excretion operation of the body. In order to analyze the data of various digestive juice contents in the stomach, it is necessary to extract the mixture of the patient's stomach digestive juice and other mixtures through equipment, and then judge by testing. Stomach disease, the existing sampling device is easy to cause blockage due to the high viscosity of the digestive tract during sampling. At the same time, it is inconvenient to block the sampling site after sampling, and the liquid in other parts is easy to enter the sampling device, which is easy to cause confusion. make the inspection inaccurate.

Based on this, the present invention provides a medical digestive tract liquid biopsy sampling device, which has solved the above-mentioned technical problems.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a liquid biopsy sampling device of the digestive tract for internal medicine.

The present invention is achieved through the following technical solutions: a medical digestive tract liquid biopsy sampling device, comprising a needle tube, the left end of the needle tube is threadedly connected with a cap through a threaded groove, the cap is connected with a push rod through a sliding hole, and the The left end of the push rod is fixedly connected with a first piston that is fit and slidably connected to the needle tube, a connecting tube is fixedly connected to the bottom of the left end of the needle tube, a second one-way valve is fixedly connected to the connecting tube, and the bottom of the connecting tube is fixedly connected There is a cover plate, the cover plate is threadedly connected with a liquid accumulation bucket, the right end of the needle tube is fixedly connected with an intermediate pipe, the left end of the intermediate pipe is fixedly connected with a first one-way valve, and the intermediate pipe is connected to the first one-way valve. A straight pipe is fixedly connected to the right end of the straight pipe, and a T-shaped push rod is attached and slidably connected to the top of the straight pipe through a sliding hole. The bottom of the T-shaped push rod is provided with a reset structure, and the reset structure is connected with a blocking cylinder. A sleeve is attached and slidably connected to the outer wall of the cylinder, and the sleeve is threadedly connected with the intermediate pipe, and the blocking cylinder and the sleeve are evenly provided with through holes for sampling.

As a further improvement of the above solution, a push plate is fixedly connected to the outer end of the push rod.

As a further improvement of the above solution, a glass window is fixedly connected to the through hole of the side wall of the liquid accumulation bucket, and a scale line is fixedly connected to the outer wall of the glass window.

As a further improvement of the above solution, an air outlet pipe is fixedly connected to the top of the cover plate, and a third one-way valve is fixedly connected to the air outlet pipe.

As a further improvement of the above solution, the side wall of the T-shaped push rod is fixedly connected with a second piston in a sliding connection with the straight pipe.

As a further improvement of the above solution, the reset structure includes a connecting rope, a spring and a straight rod, the bottom of the T-shaped push rod is fixedly connected with a connecting rope, the right end of the connecting rope is connected with a straight rod, and the right end of the straight rod is connected to the The blocking cylinder is fixedly connected, the spring is arranged between the intermediate pipe and the blocking cylinder, and when the connecting rope is loose, the spring pushes the through hole of the blocking cylinder to coincide with the through hole of the sleeve.

As a further improvement of the above solution, the spring is sleeved on the outer end of the connecting rope, and both ends of the spring are not fixedly connected to the intermediate tube and the blocking cylinder.

As a further improvement of the above solution, the left end of the straight rod is fixedly connected with a convex block, the convex block is threadedly connected with a fixing bolt through a threaded hole, and the bottom of the fixing bolt is connected to the convex block through a connecting rope.

As a further improvement of the above solution, the outer wall of the blocking cylinder is evenly provided with limit sliding grooves along the circumferential direction, and the inner wall of the sleeve is evenly connected to the limit slider along the circumferential direction, and the limit slider is connected to the limit slider. Slot fit sliding connection.

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

1. When sampling in the present invention, the connecting rope is in a loose state, the push plate drives the push rod to move, the push rod drives the first piston to move to the left, the first piston makes the needle tube in negative pressure, the first one-way valve is opened, and the second one-way valve is opened. Close, the liquid in the digestive tract enters the intermediate tube through the through hole, and then enters the needle tube, and then pushes the first piston to move to the right, the first one-way valve is closed, the second one-way valve and the third one-way valve are opened, and the needle tube is closed. The liquid enters the effusion bucket for collection through the connecting pipe, which makes the device convenient to sample the liquid in the digestive tract. By designing a third one-way valve on the air outlet pipe, it can prevent the outside air from entering the effusion bucket and avoid the outside air from sampling. Then, by designing glass windows and scale lines on the outer wall of the effusion bucket, it is convenient for the staff to know the sampling amount in the effusion bucket in time.

2. In the present invention, the T-shaped push rod in the straight tube moves upward, the T-shaped push rod drives the connecting rope of the reset structure to move, the connecting rope drives the blocking cylinder to move through the straight rod, and drives the solid part of the blocking cylinder to move to the through hole of the sleeve , block the through hole of the sleeve, and it is convenient to block the through hole of the sleeve after sampling, so that the liquid in other parts will not enter the sampling device when the sleeve moves, which ensures the correctness of sampling and makes the inspection more accurate. , During sampling, the T-shaped push rod is intermittently active. When the T-shaped push rod is pulled, the blocking cylinder moves to the left. When the T-shaped push rod is released, the spring pushes the straight rod to move, and the straight rod pushes the blocking cylinder to move to the right. The barrel is convenient for stirring the viscous liquid to be sampled, which helps the viscous liquid to flow, avoids the viscous liquid from blocking the through hole of the sleeve, and ensures the continuity of sampling;

3. In the present invention, the bump and the connecting rope are connected by fixing bolts, so that the connecting rope can be easily separated from the bump. At the same time, the sleeve is threadedly connected with the intermediate pipe, so that the sleeve can be easily mounted and dismounted on the intermediate pipe. The chute is slidably connected with the limit slider of the sleeve, which makes the sleeve and the blocking cylinder easy to install and disassemble, and facilitates the cleaning and replacement of the blocking cylinder and the sleeve;

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the structural front view of the present invention;

Fig. 2 is the structural sectional view of the present invention;

3 is a sectional view of the sleeve of the present invention and its connection structure;

Fig. 4 is the left side view of the sleeve of the present invention and its connecting structure;

Fig. 5 is the enlarged schematic diagram of the structure at A place in Fig. 2 of the present invention;

The reference numbers are as follows:

1. Needle tube 2. Push plate 3. Push rod 4. Cap 5. Straight tube 6. Intermediate tube 7. Sleeve 8. First check valve 9. Second check valve 10. Connecting tube 11. Cover plate 12. Liquid bucket 13. Scale line 14. Glass window 15. Third one-way valve 16. Air outlet pipe 17. First piston 18. T-shaped push rod 19. Second piston 20. Connecting rope 21. Bump 22. Fixing bolt 23. Blocking cylinder 24. Through hole 25. Straight rod 26. Spring 27. Limit slider 28. Limit chute.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

The technical solutions of the present invention are further described below with reference to the accompanying drawings.

Example 1

As shown in Figures 1-5, a medical digestive tract liquid biopsy sampling device includes a needle tube 1, the left end of the needle tube 1 is threadedly connected with a cap 4 through a threaded groove, and the cap 4 is connected with a push rod 3 through a sliding hole, and the push rod 3 The left end of the needle tube 1 is fixedly connected with a first piston 17 that is fit and slidably connected to the needle tube 1, the bottom of the left end of the needle tube 1 is fixedly connected with a connecting tube 10, the connecting tube 10 is fixedly connected with a second one-way valve 9, and the bottom of the connecting tube 10 is fixedly connected with a The cover plate 11, the cover plate 11 is threadedly connected with the liquid accumulation bucket 12, the right end of the needle tube 1 is fixedly connected with an intermediate pipe 6, the left end of the intermediate pipe 6 is fixedly connected with a first one-way valve 8, and the intermediate pipe 6 is in the first one-way valve 8. The right end is fixedly connected with a straight pipe 5, the top of the straight pipe 5 is connected with a T-shaped push rod 3 through sliding holes, and the bottom of the T-shaped push rod 3 is provided with a reset structure, and the reset structure includes a connecting rope 20, a spring 26 and a straight rod 25. The bottom of the T-shaped push rod 3 is fixedly connected with a connecting rope 20, the right end of the connecting rope 20 is connected with a straight rod 25, the right end of the straight rod 25 is fixedly connected with the blocking cylinder 23, and the spring 26 is arranged between the intermediate tube 6 and the blocking cylinder 23. , and when the connecting rope 20 is loose, the spring 26 pushes the through hole 24 of the blocking cylinder 23 to coincide with the through hole 24 of the sleeve 7, the spring 26 is sleeved on the outer end of the connecting rope 20, and both ends of the spring 26 are not connected with the intermediate tube 6 and The blocking cylinder 23 is fixedly connected, which is convenient for the spring 26 to be mounted and dismounted between the blocking cylinder 23 and the intermediate pipe 6. The reset structure is connected with the blocking cylinder 23. Threaded connection, the blocking cylinder 23 and the sleeve 7 are evenly provided with through holes 24 for sampling, and the T-shaped push rod 18 in the straight pipe 5 moves upward, and the T-shaped push rod 18 drives the connecting rope 20 of the reset structure to move, and the connecting rope 20 The blocking cylinder 23 is driven to move by the straight rod 25, and the solid part of the blocking cylinder 23 is moved to the through hole 24 of the sleeve 7 to block the through hole 24 of the sleeve 7, which is convenient for the through hole 24 of the sleeve 7 after sampling. The parts are blocked, so that the liquid in other parts will not enter the sampling device when the sleeve 7 moves, which ensures the correctness of sampling and makes the inspection more accurate. During sampling, the T-shaped push rod 18 is intermittently moved to pull the T-shaped When the push rod is 8, the blocking cylinder 23 moves to the left. When the T-shaped push rod 25 is released, the spring 26 pushes the straight rod 25 to move, and the straight rod 25 pushes the blocking cylinder 23 to move to the right. The blocking cylinder 23 is convenient for sampling the viscous liquid. Stirring helps the viscous liquid to flow, prevents the viscous liquid from blocking the through hole 24 of the sleeve 7, and ensures the continuity of sampling.

Example 2

Embodiment 2 is a further improvement of Embodiment 1.

As shown in Figures 1-5, a medical digestive tract liquid biopsy sampling device includes a needle tube 1, the left end of the needle tube 1 is threadedly connected with a cap 4 through a threaded groove, and the cap 4 is connected with a push rod 3 through a sliding hole, and the push rod 3 The left end of the needle tube 1 is fixedly connected with a first piston 17 that is fit and slidably connected to the needle tube 1, the bottom of the left end of the needle tube 1 is fixedly connected with a connecting tube 10, the connecting tube 10 is fixedly connected with a second one-way valve 9, and the bottom of the connecting tube 10 is fixedly connected with a The cover plate 11, the cover plate 11 is threadedly connected with the liquid accumulation bucket 12, the right end of the needle tube 1 is fixedly connected with an intermediate pipe 6, the left end of the intermediate pipe 6 is fixedly connected with a first one-way valve 8, and the intermediate pipe 6 is in the first one-way valve 8. The right end is fixedly connected with a straight pipe 5, the top of the straight pipe 5 is connected with a T-shaped push rod 3 through sliding holes, and the bottom of the T-shaped push rod 3 is provided with a reset structure, and the reset structure includes a connecting rope 20, a spring 26 and a straight rod 25. The bottom of the T-shaped push rod 3 is fixedly connected with a connecting rope 20, the right end of the connecting rope 20 is connected with a straight rod 25, the right end of the straight rod 25 is fixedly connected with the blocking cylinder 23, and the spring 26 is arranged between the intermediate tube 6 and the blocking cylinder 23. , and when the connecting rope 20 is loose, the spring 26 pushes the through hole 24 of the blocking cylinder 23 to coincide with the through hole 24 of the sleeve 7, the spring 26 is sleeved on the outer end of the connecting rope 20, and both ends of the spring 26 are not connected with the intermediate tube 6 and The blocking cylinder 23 is fixedly connected, the left end of the straight rod 25 is fixedly connected with a convex block 21, the convex block 21 is threadedly connected with a fixing bolt 22 through a threaded hole, the bottom of the fixing bolt 22 is connected with the convex block 21 through the connecting rope 20, and the reset structure is connected with a stopper Tube 23, the outer wall of the blocking tube 23 is attached and slidably connected with the sleeve 7, and the sleeve 7 is threadedly connected with the intermediate pipe 6, the blocking tube 23 and the sleeve 7 are evenly provided with through holes 24 for sampling, and the outer wall of the blocking tube 23 is along the The limit chute 28 is evenly set in the circumferential direction, and the inner wall of the sleeve 7 is evenly connected to the limit slider 27 along the circumferential direction. The hole 24 moves left and right under the through hole 24 of the sleeve 7, and the protrusion 21 and the connecting rope 20 are connected by the fixing bolt 22, so that the connecting rope 29 is easily separated from the protrusion 21, and the sleeve 7 and the intermediate pipe 6 are threadedly connected, The sleeve 7 can be easily mounted and dismounted on the intermediate pipe 6. In addition, the blocking cylinder 23 is slidably connected with the limit slider 27 of the sleeve 7 through the limit chute 28, so that the sleeve 7 and the blocking cylinder 23 can be easily mounted and dismounted, and it is convenient for blocking The cartridge 23 and the sleeve 7 are cleaned and replaced.

Example 3

As shown in Figures 1-5, a medical digestive tract liquid biopsy sampling device includes a needle tube 1, the left end of the needle tube 1 is threadedly connected with a cap 4 through a threaded groove, and the cap 4 is connected with a push rod 3 through a sliding hole, and the push rod 3 The outer end is fixedly connected with a push plate 2, the left end of the push rod 3 is fixedly connected with a first piston 17 that is fit and slidably connected with the needle tube 1, the bottom of the left end of the needle tube 1 is fixedly connected with a connecting tube 10, and the connecting tube 10 is fixedly connected with a second piston 17. One-way valve 9, a cover plate 11 is fixedly connected to the bottom of the connecting pipe 10, an air outlet pipe 15 is fixedly connected to the top of the cover plate 11, a third one-way valve 16 is fixedly connected to the air outlet pipe 15, and a liquid accumulation bucket is threadedly connected to the cover plate 11. 12. A glass window 14 is fixedly connected to the through hole 24 of the side wall of the liquid accumulation bucket. A scale line 13 is fixedly connected to the outer wall of the liquid accumulation bucket 12. The right end of the needle tube 1 is fixedly connected to an intermediate tube 6, and the left end of the intermediate tube 6 is fixed A first one-way valve 8 is connected, the middle pipe 6 is fixedly connected with a straight pipe 5 at the right end of the first one-way valve 8, and the top of the straight pipe 5 is fitted and slidably connected with a T-shaped push rod 3 through a sliding hole, and the T-shaped push rod 3. The side wall is fixedly connected with a second piston 19 in a sliding connection with the straight pipe 5. The bottom of the T-shaped push rod 3 is provided with a reset structure. The reset structure is connected with a blocking cylinder 23. The cylinder 7, and the sleeve 7 is threadedly connected with the intermediate pipe 6, the blocking cylinder 23 and the sleeve 7 are evenly provided with through holes 24 for sampling, the connecting rope 20 is in a loose state during sampling, the push plate 2 drives the push rod 3 to move, and pushes the The rod 3 drives the first piston 17 to move to the left, the first piston 17 makes the needle tube 1 under negative pressure, the first one-way valve 8 is opened, the second one-way valve 9 is closed, and the liquid in the digestive tract enters the intermediate tube 6 through the through hole 24 Then enter the needle tube 1, and then push the first piston 17 to move to the right, the first one-way valve 8 is closed, the second one-way valve 9 and the third one-way valve 15 are opened, and the liquid in the needle tube 1 passes through the connecting tube 10. It enters the liquid accumulation bucket 12 for collection, so that the device can conveniently sample the liquid in the digestive tract. By designing the third one-way valve 15 on the air outlet pipe 16, the outside air can be prevented from entering the liquid accumulation bucket 12, and the accumulation of fluid can be ensured at the same time. The air pressure in the bucket 12 is balanced to avoid the influence of the outside air on the sampled liquid. Then, by designing the glass window 14 and the scale line 13 on the outer wall of the fluid accumulation bucket 12, it is convenient for the staff to know the sampling amount in the fluid accumulation bucket in time.

Specific use: when sampling, the connecting rope 20 is in a loose state, the push plate 2 drives the push rod 3 to move, the push rod 3 drives the first piston 17 to move to the left, the first piston 17 makes the needle tube 1 in negative pressure, the first one-way valve 8 Open, the second one-way valve 9 is closed, the liquid in the digestive tract enters the intermediate tube 6 through the through hole 24, and then enters the needle tube 1, and then pushes the first piston 17 to move to the right, the first one-way valve 8 is closed, and the second one-way valve 8 is closed. The one-way valve 9 and the third one-way valve 15 are opened, and the liquid in the needle tube 1 enters the fluid accumulation bucket 12 through the connecting tube 10 for collection, so that the device can conveniently sample the liquid in the digestive tract. The three-way valve 15 can prevent the outside air from entering the liquid accumulation tank 12, and at the same time can ensure the air pressure balance in the liquid accumulation tank 12, so as to avoid the influence of the external air on the sampled liquid. 14 and the scale line 13, it is convenient for the staff to know the sampling volume in the effusion tank in time. When sampling, the T-shaped push rod 18 is intermittently moved. When the T-shaped push rod 18 is pulled, the blocking cylinder 23 moves to the left, and the T-shaped push rod is released. When the rod is 18, the spring 26 pushes the straight rod 25 to move, and the straight rod 25 pushes the blocking cylinder 23 to move to the right. The blocking cylinder 23 facilitates agitation of the viscous liquid sampled, helps the viscous liquid to flow, and prevents the viscous liquid from pulling the sleeve. The through hole 24 of the cylinder 7 is blocked to ensure the continuity of sampling; after sampling, push the T-shaped push rod 18 in the straight pipe 5 to move upward, and the T-shaped push rod 18 drives the connecting rope 20 of the reset structure to move, and the connecting rope 20 passes through The straight rod 25 drives the blocking cylinder 23 to move, drives the solid part of the blocking cylinder 23 to move to the through hole 24 of the sleeve 7, blocks the through hole 24 of the sleeve 7, and facilitates the inspection of the through hole 24 of the sleeve 7 after sampling. Blocking, so that when the sleeve 7 moves, the liquid in other parts will not enter the sampling device, which ensures the correctness of sampling and makes the inspection more accurate;

The bump 21 and the connecting rope 20 are connected by the fixing bolts 22, so that the connecting rope 29 is easily separated from the bump 21, and the sleeve 7 is threadedly connected with the intermediate pipe 6, so that the sleeve 7 can be easily mounted and dismounted on the intermediate pipe 6. In addition, The blocking cylinder 23 is slidably connected to the limiting slider 27 of the sleeve 7 through the limiting chute 28 , so that the sleeve 7 and the blocking cylinder 23 can be easily assembled and disassembled, and the blocking cylinder 23 and the sleeve 7 can be cleaned and replaced conveniently.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (9)

1. A digestive tract liquid biopsy sampling device for internal medicine comprises a needle tube (1), and is characterized in that: the left end of the needle tube (1) is connected with a cap (4) through a thread groove and a thread, the cap (4) is connected with a push rod (3) through a sliding hole, the left end of the push rod (3) is fixedly connected with a first piston (17) which is in sliding connection with the needle tube (1) in a laminating manner, the bottom of the left end of the needle tube (1) is fixedly connected with a connecting tube (10), the connecting tube (10) is fixedly connected with a second one-way valve (9), the bottom of the connecting tube (10) is fixedly connected with a cover plate (11), the cover plate (11) is in threaded connection with a liquid accumulation barrel (12), the right end of the needle tube (1) is fixedly connected with an intermediate tube (6), the left end of the intermediate tube (6) is fixedly connected with a first one-way valve (8), the intermediate tube (6) is fixedly connected with a straight tube (5) at the right end of the first one-way valve (, t shape push rod (3) bottom is equipped with the structure that resets, the structure that resets is connected with a fender section of thick bamboo (23), keep off a section of thick bamboo (23) outer wall laminating sliding connection and have sleeve (7), and sleeve (7) and intervalve (6) threaded connection, keep off a section of thick bamboo (23) and sleeve (7) and evenly offer through-hole (24) that are used for the sample.

2. A medical digestive tract liquid biopsy sampling device according to claim 1, wherein: the outer end of the push rod (3) is fixedly connected with a push plate (2).

3. A medical digestive tract liquid biopsy sampling device according to claim 1, wherein: liquid accumulation barrel side wall through hole (24) department fixedly connected with glass window (14), liquid accumulation barrel (12) is at glass window (14) outer wall fixedly connected with scale mark (13).

4. A medical digestive tract liquid biopsy sampling device according to claim 1, wherein: the top of the cover plate (11) is fixedly connected with an air outlet pipe (15), and the air outlet pipe (15) is fixedly connected with a third one-way valve (16).

5. A medical digestive tract liquid biopsy sampling device according to claim 1, wherein: the side wall of the T-shaped push rod (3) is fixedly connected with a second piston (19) which is attached to the straight pipe (5) in a sliding connection mode.

6. A medical digestive tract liquid biopsy sampling device according to claim 1, wherein: the reset structure comprises a connecting rope (20), a spring (26) and a straight rod (25), the bottom of the T-shaped push rod (3) is fixedly connected with the connecting rope (20), the right end of the connecting rope (20) is connected with the straight rod (25), the right end of the straight rod (25) is fixedly connected with the blocking barrel (23), the spring (26) is arranged between the middle pipe (6) and the blocking barrel (23), and the connecting rope (20) pushes the through hole (24) of the blocking barrel (23) to coincide with the through hole (24) of the sleeve (7) when the spring (26) is loosened.

7. A medical digestive tract liquid biopsy sampling device according to claim 1, wherein: the spring (26) is sleeved at the outer end of the connecting rope (20), and both ends of the spring (26) are not fixedly connected with the middle pipe (6) and the blocking cylinder (23).

8. The biopsy sampling device for digestive tract liquid used in medical department according to claim 6, wherein: the left end of the straight rod (25) is fixedly connected with a bump (21), the bump (21) is connected with a fixing bolt (22) through a threaded hole in a threaded manner, and the bottom of the fixing bolt (22) is connected with the bump (21) through a connection rope (20).

9. A medical digestive tract liquid biopsy sampling device according to claim 1, wherein: keep off a section of thick bamboo (23) outer wall and evenly seted up spacing spout (28) along the circumferencial direction, sleeve (7) inner wall is along the even fixedly connected with spacing slider (27) of circumferencial direction, spacing slider (27) and spacing spout (28) laminating sliding connection.

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