Gastric cancer pathological tissue biopsy forceps

Abstract

The utility model discloses a kind of gastric carcinoma pathological tissue biopsy forceps, specifically related to biopsy instrument technical field, including the head of forceps, the head of forceps one end is connected with the body of forceps hose, the body of forceps hose one end is connected with handle, the handle and the body of forceps hose inside are equipped with steel wire, the head of forceps outer end is equipped with the steel wire pull ring connected with one end of steel wire;The steel wire pull ring inside one side is fixed with lock male head, the handle inside is rotatably connected with lock female head, when control head of forceps closure, the steel wire pull ring pulls steel wire and moves in handle interior and drives lock male head one end to insert lock female head interior and realize locking.The utility model locks by lock male head and lock female head are clamped together, to make the head of forceps keep closed state, so that medical staff even in the process of back suction body of forceps hose hand loosening also cannot cause the tissue block dropped in the head of forceps clamping, to improve the success rate of gastric carcinoma pathological tissue taking process, reduce operation difficulty.

Description

Technical Field

[0001] This utility model relates to the field of biopsy instruments, and more specifically to a biopsy forceps for gastric cancer pathological tissue. Background Technology

[0002] A definitive diagnosis of gastric cancer relies on pathological tissue examination (i.e., biopsy), which is the "gold standard" for clinical diagnosis. The main reasons include: 1. Early gastric cancer may appear similar to benign ulcers, gastritis, and polyps under gastroscopy (e.g., mucosal erosion, bulging, or depression), making accurate differentiation impossible using imaging techniques (e.g., gastroscopy, CT); 2. Pathological examination allows for microscopic observation of cell morphology (e.g., mitotic figures, abnormal nuclear-cytoplasmic ratio) and disordered tissue structure (e.g., glandular destruction), clarifying whether it is cancerous; 3. Gastric cancer is divided into various subtypes (e.g., adenocarcinoma, signet ring cell carcinoma, neuroendocrine carcinoma, etc.), with significant differences in treatment plans and prognosis between different subtypes. Biopsy can accurately determine the subtype of gastric cancer, guiding targeted therapy.

[0003] Currently, endoscopic biopsy is the most common clinical method for obtaining pathological tissues from hollow organs such as the digestive tract (stomach, intestines), respiratory tract (bronchus), and urinary system (bladder). This involves inserting biopsy forceps through an endoscope (such as a gastroscope, colonoscope, or bronchoscope) to directly examine and extract suspicious mucosal tissue. It is often used to diagnose gastric cancer, esophageal cancer, colorectal cancer, and bronchogenic carcinoma.

[0004] Biopsy forceps, used in conjunction with endoscopy, are a primary instrument for obtaining pathological tissue. They mainly consist of a forceps head, handle, and body. The body is typically made of stainless steel threaded tubing with an internal wire or spring structure. The handle controls the opening and closing of the forceps head via the wire to grasp pathological tissue, as seen in prior art publications CN221865800U and CN222533328U. When these forceps grasp pathological tissue, medical personnel must manually operate the handle to control the closure of the forceps head before withdrawing it along the endoscopic cavity. During this process, the medical personnel must maintain a consistent control posture on the handle; otherwise, if the forceps head opens, the grasped tissue will be lost, increasing the difficulty of the operation. Furthermore, during the withdrawal of the forceps head, because it is concealed within the endoscopic cavity, medical personnel cannot directly observe its position. This can easily lead to contact between the forceps head and the pathological tissue grasped by the forceps head during withdrawal, causing contamination and affecting the accuracy of pathological examination. Utility Model Content

[0005] To overcome the aforementioned deficiencies in the prior art, this utility model provides a gastric cancer pathological tissue biopsy forceps. By locking the male and female locking heads together, the forceps head is kept in a closed state. This prevents the tissue block gripped in the forceps head from falling out even if the medical staff loosens their hands during the retraction of the forceps body tubing. This improves the success rate of gastric cancer pathological tissue collection and reduces the difficulty of operation, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a forceps for gastric cancer pathological tissue biopsy, comprising a forceps head, one end of which is connected to a forceps body flexible tube, one end of which is connected to a handle, and a steel wire inside the handle and the forceps body flexible tube. The opening and closing of the forceps head is achieved by controlling the movement of the steel wire inside the handle. A steel wire pull ring connected to one end of the steel wire is provided at the outer end of the forceps head.

[0007] A locking male head is fixed on one side inside the wire pull ring. The locking male head is located inside the handle. A locking female head is rotatably connected inside the handle. When the control clamp head is closed, the wire pull ring pulls the wire to move inside the handle and drives one end of the locking male head to insert into the locking female head to achieve locking.

[0008] The outer end of the forceps body is fitted with a sampling capsule for accommodating the tissue block taken from the forceps head, and one end of the sampling capsule is inserted into the inlet of the endoscope lumen.

[0009] In a preferred embodiment, the locking male connector includes a connecting rod disposed inside the handle, a connecting seat a fixed at one end of the connecting rod, and four limiting blocks connected in a circular array on the side of the connecting seat a away from the connecting rod. The limiting blocks are machined with notches, and the end of the limiting blocks away from the connecting seat a is machined into a bevel.

[0010] The locking female connector includes a connecting seat b, which contains four plugs arranged in a circular array inside the connecting seat b. The end of each plug away from the connecting seat b is machined into a bevel, and the bevel at one end of the plug has the same angle as the bevel at one end of the connecting seat b. Two springs b arranged side by side are fixed to the end of the plug near the connecting seat b. One end of each spring b is fixedly connected to the side wall of the connecting seat b. When the connecting rod moves with the wire pull ring, it first pushes the plug back into the side wall of the connecting seat b through the limiting block, and then the compressed spring b pushes the bottom end of the plug into the notch of the limiting block to achieve locking.

[0011] In a preferred embodiment, a connecting cylinder is fixed to the side of the connecting seat b away from the connecting seat a. A limiting plate is fixed to one end of the connecting cylinder. The limiting plate is embedded in the inner wall of the handle to fix the position of the connecting seat b. A short rod is fixed to the top of the limiting plate. The top of the short rod passes through the handle and is fixedly connected to a lever. By rotating the lever along the outer wall of the handle, the plug is turned out from the notch of the limiting block, thereby releasing the locking of the male and female plugs.

[0012] In a preferred embodiment, a coil spring is fitted around the outer end of the connecting cylinder. One end of the coil spring is fixed to the outer wall of the connecting cylinder, and the other end of the coil spring is fixed to the inner wall of the handle. This is used to reset the connecting seat b and the plug after the toggle block drives the connecting seat b to rotate.

[0013] An annular plate is fixed to the inner wall of the handle. A spring a is fixed to one side of the annular plate. A circular plate is fixed to the end of the spring a away from the annular plate. The steel wire passes through the circular plate and is fixed to the circular plate. When the steel wire pull ring pulls the steel wire upward, it pulls the spring a to extend through the circular plate. After the plug is turned out from the notch, the spring a pulls the steel wire downward and controls the opening of the pliers.

[0014] In a preferred embodiment, the handle includes a hollow rod fixed to one end of the clamp body tubing, a rod head rotatably connected to one end of the hollow rod, and a thumb ring for medical personnel to insert their thumbs at the end of the rod head away from the hollow rod.

[0015] The outer diameters of connecting seat a and connecting seat b are the same as the inner diameter of the hollow rod, and the outer diameter of the limiting plate is larger than the inner diameter of the hollow rod. The limiting plate is embedded in the inner wall of the hollow rod.

[0016] In a preferred embodiment, the sampling capsule includes a transparent balloon, one side of which is machined into a plane and the other side into a spherical surface, so as to facilitate the opening of the forceps inside the balloon;

[0017] Both ends of the balloon are fixedly connected to transparent threaded tubes. The inner diameter of the threaded tubes is larger than the outer diameter of the forceps tubing, and the outer diameter of the threaded tubes is smaller than the inner diameter of the endoscope lumen. The two threaded tubes are of different lengths. The longer threaded tube is used to insert into the endoscope lumen. The ends of the two threaded tubes away from the balloon are threaded with threaded caps to seal the tissue block inside the balloon.

[0018] In a preferred embodiment, the wire pull ring includes a pull ring seat fitted around the outside of the hollow rod. A movable plate that slides in the inner wall of the hollow rod is fixed in the middle of the pull ring seat. Both sides of the movable plate are machined with protrusions that slide in the strip holes on the outer wall of the hollow rod.

[0019] In a preferred embodiment, a marking strip is machined on the outer wall of the forceps tubing near the handle, and the front end of the marking strip moves to the inlet position of the endoscope lumen when the front end of the forceps head extends out of the endoscope lumen.

[0020] The technical effects and advantages of this utility model are as follows:

[0021] 1. This utility model can lock the locking male and female heads together when the steel wire pull ring pulls the steel wire to control the closing of the clamp head, thereby fixing the position of the steel wire pull ring and the steel wire at this time, keeping the clamp head in a closed state. This prevents the tissue block clamped in the clamp head from falling out even if the medical staff loosens their hands during the retraction of the clamp body tubing, thereby improving the success rate of gastric cancer pathological tissue collection and reducing the difficulty of operation.

[0022] 2. This utility model inserts one end of the sampling capsule into the inlet of the endoscope lumen, so that the collected tissue sample passes through the sampling capsule during the aspiration process. Then, by controlling the forceps to open, the collected tissue block can fall into the sampling capsule. This design not only eliminates the need for medical staff to take extra containers to collect the tissue block, but also avoids contact between the operator and the tissue block, which helps to prevent contamination of the tissue block and ensure the accuracy of the biopsy results. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a top view of the present invention after the sampling balloon has been removed;

[0025] Figure 3 This is a schematic diagram of the internal structure of the handle of this utility model;

[0026] Figure 4 This is a schematic diagram of the steel wire pull ring structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the locking male and locking female connectors of this utility model;

[0028] Figure 6 An explosion-proof view of the locking male and locking female connectors of this utility model. Figure 1 ;

[0029] Figure 7 An explosion-proof view of the locking male and locking female connectors of this utility model. Figure 2 ;

[0030] Figure 8 This is a schematic diagram showing the forceps head of this invention after it has been moved into the sampling balloon.

[0031] Figure 9This is a schematic diagram of the sampling capsule structure of this utility model.

[0032] The attached figures are labeled as follows:

[0033] 1. Pliers head; 2. Pliers body flexible hose; 3. Handle; 4. Steel wire; 5. Steel wire pull ring; 6. Sampling bag; 7. Marking strip; 8. Locking male connector; 9. Locking female connector;

[0034] 31. Hollow club; 32. Club head; 33. Thumb ring;

[0035] 41. Ring plate; 42. Spring a; 43. Circular plate;

[0036] 51. Pull ring seat; 52. Moving plate; 53. Protrusion;

[0037] 61. Balloon; 62. Threaded tube; 63. Threaded cap;

[0038] 81. Connecting rod; 82. Connecting seat a; 83. Limiting block;

[0039] 91. Connecting seat b; 92. Plug; 93. Spring b; 94. Connecting cylinder; 95. Coil spring; 96. Limiting plate; 97. Short rod; 98. Toggle block. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Refer to the instruction manual appendix Figure 1 and 2 This utility model provides a forceps for gastric cancer pathological tissue biopsy, including a forceps head 1, a forceps body flexible tube 2 connected to one end of the forceps head 1, a handle 3 connected to one end of the forceps body flexible tube 2, and a steel wire 4 disposed inside the handle 3 and the forceps body flexible tube 2. One end of the steel wire 4 passes through the handle 3 and the forceps body flexible tube 2 and connects to the forceps head 1, as detailed below. Figure 3 As shown: The handle 3 includes a hollow rod 31 fixed to one end of the forceps body tubular tube 2. A rod head 32 is rotatably connected to one end of the hollow rod 31. A thumb ring 33 for medical personnel to insert their thumb is fixed to the end of the rod head 32 away from the hollow rod 31.

[0042] A wire pull ring 5, which is connected to one end of the wire 4, is also provided at the outer end of the pliers head 1, as shown in the details. Figure 4As shown: The wire pull ring 5 includes a pull ring seat 51 sleeved on the outside of the hollow rod 31. A movable plate 52 that slides in the inner wall of the hollow rod 31 is fixed in the middle of the pull ring seat 51. The end of the wire 4 away from the forceps head 1 is fixed to the side wall of the movable plate 52. Both sides of the movable plate 52 are processed with protrusions 53. The protrusions 53 slide in the strip hole on the outer wall of the hollow rod 31. When in use, the medical staff inserts their thumb into the thumb ring 33, and their index and middle fingers hold the pull ring seat 51. Then, the other hand inserts the forceps head 1 and the forceps body tubing 2 into the endoscope cavity. Since the medical staff's field of vision through the endoscope is limited, in order to prevent the front end of the forceps head 1 from protruding from the endoscope cavity and puncturing the gastric mucosa, this utility model also processes a marking strip 7 on the outer wall of the forceps body tubing 2 near the handle 3. When the front end of the forceps head 1 protrudes from the endoscope cavity, the front end of the marking strip 7 moves to the endoscope cavity inlet position.

[0043] Next, medical staff observe the location of abnormal tissue in the stomach through endoscopy, and then use the fingers holding the pull ring seat 51 to pull the pull ring seat 51 towards the thumb ring 33, so that the steel wire 4 can move upward, control the clamp head 1 inserted into the patient's stomach to close, so as to grab the tissue block suspected of being gastric cancer in the patient's stomach, and then send the grabbed tissue block for biopsy to determine whether the patient has gastric cancer.

[0044] When grasping tissue, if the location is too narrow for the forceps head 1 to open, or if the location is unsuitable for grasping tissue, then the forceps head 1 needs to be rotated or its angle adjusted. Figure 3 As shown: In this invention, the outer wall of the hollow rod 31 near the rod head 32 is convex and is locked inside the rod head 32. This design allows medical personnel to keep their thumb stationary and rotate the hollow rod 31 independently. The hollow rod 31 drives the pull ring seat 51 and the steel wire 4 inside it to rotate, thereby rotating the forceps head 1 and adjusting its angle. The rotation process can be observed by medical personnel through the endoscope display screen until the forceps head 1 is rotated to the appropriate position.

[0045] In this embodiment, since the biopsy forceps need to be sterilized before use, the marking strip 7 needs to be made of a material that can be sterilized together with the biopsy forceps, such as thermoplastic elastomer. In order to play a prominent role in indicating the presence of the forceps, the marking strip 7 can also be processed into a different color from the forceps body tubing 2, such as red, yellow, green, etc., to facilitate identification by medical staff.

[0046] In addition, since the endoscopes used in gastroenterology include different types such as gastroscopes, colonoscopes, and enteroscopes, and different types of endoscopes have different lengths, the length of the forceps tube 2 and the length of the marking strip 7 in this utility model can be flexibly set according to the specific type of endoscope.

[0047] After the forceps 1 grasps the tissue block, the medical staff needs to withdraw the forceps 1 from the endoscopic cavity. During this process, traditional biopsy forceps require the medical staff to maintain a fixed hand position gripping the pull ring seat 51. Because the forceps body flexible tube 2 has a certain length, withdrawing it takes a certain amount of time. To prevent the medical staff from accidentally loosening their grip due to tension or other interference, causing the grasped tissue block to fall, etc. Figure 3 As shown, the present invention has a locking male head 8 fixed inside one side of the wire pull ring 5. The locking male head 8 is located inside the handle 3. A locking female head 9 is also rotatably connected inside the handle 3. When the control clamp head 1 is closed, the wire pull ring 5 pulls the wire 4 to move inside the handle 3 and drives one end of the locking male head 8 to be inserted into the locking female head 9 to lock and fix the position of the wire pull ring 5.

[0048] Specifically, such as Figures 5-7 As shown, the locking male connector 8 includes a connecting rod 81 disposed inside the hollow rod 31. One end of the connecting rod 81 is fixed to the side wall of the moving plate 52. A connecting seat a82 is fixed to one end of the connecting rod 81. Four limiting blocks 83 are connected in a ring array on the side of the connecting seat a82 away from the connecting rod 81. Notches are machined on the limiting blocks 83.

[0049] The locking female connector 9 includes a connecting seat b91, which contains four plugs 92 arranged in a circular array inside the connecting seat b91. Two springs b93 are fixed at one end of each plug 92 near the connecting seat b91. One end of each spring b93 is fixedly connected to the side wall of the connecting seat b91. A connecting cylinder 94 is fixed on the side of the connecting seat b91 away from the connecting seat a82. A limiting plate 96 is fixed at one end of the connecting cylinder 94. The outer diameters of the connecting seat a82 and the connecting seat b91 are the same as the inner diameter of the hollow rod 31. The outer diameter of the limiting plate 96 is larger than the inner diameter of the hollow rod 31. The limiting plate 96 is embedded in the inner wall of the hollow rod 31 to fix the position of the connecting seat b91.

[0050] As medical staff use their index and middle fingers to grip and move the pull ring seat 51 upwards, they also move the connecting rod 81 synchronously. This allows the connecting rod 81 to drive the limiting block 83 on one side of the connecting seat a82 into the connecting seat b91. Since the end of the limiting block 83 away from the connecting seat a82 and the end of the connector 92 away from the connecting seat b91 are both machined into bevels with the same angle, the limiting block 83 will first push the connector 92 back into the side wall of the connecting seat b91 along the bevel during the insertion process. The retraction of the connecting seat b91 will compress the spring b93. When the limiting block 83 continues to move until the notch on the limiting block 83 aligns with the connector 92, the compressed spring b93 will push the bottom end of the connector 92 into the notch of the limiting block 83, thus locking it in place. Figure 5As shown in the diagram, this fixes the positions of the connecting rod 81 and the connecting seat a82, thus fixing the positions of the movable plate 52, the pull ring seat 51, and the steel wire 4 connected to the connecting rod 81, ensuring that the forceps head 1 remains closed. Even if the medical staff's hand loosens during the retraction of the forceps body tubing 2, the tissue block gripped in the forceps head 1 will not fall out, eliminating the need for the medical staff to maintain a constant hand position and reducing the difficulty of operation.

[0051] When it is necessary to release the tissue block gripped in the forceps head 1, the locking between the male locking head 8 and the female locking head 9 must be released first. This invention utilizes a short rod 97 fixed to the top of the limiting plate 96. The top of the short rod 97 passes through the handle 3 and is fixedly connected to a lever 98. By rotating the lever 98 along the outer wall of the handle 3, the connector 92 is rotated out of the notch in the limiting block 83, so that the connector 92 no longer restricts the movement of the limiting block 83. Additionally, a [missing information - likely a device or mechanism] is fixed to the inner wall of the handle 3. A ring plate 41 is provided, and a spring a42 is fixed to one side of the ring plate 41. A circular plate 43 is fixed to the end of the spring a42 away from the ring plate 41. A steel wire 4 passes through the circular plate 43 and is fixed to the circular plate 43. When the steel wire pull ring 5 pulls the steel wire 4 upward, it pulls the spring a42 through the circular plate 43 to extend. When the connector 92 is turned out from the notch, the extended spring a42 will pull the steel wire 4 downward and control the clamp head 1 to open. At this time, the tissue block can fall out from the opened clamp head 1.

[0052] In this embodiment, in order to ensure that the connector 92 remains locked to the limiting block 83 during the next use, a coil spring 95 is fitted on the outer end of the connecting cylinder 94. One end of the coil spring 95 is fixed to the outer wall of the connecting cylinder 94, and the other end is fixed to the inner wall of the handle 3. When the lever 98 drives the limiting plate 96 to rotate, the connecting cylinder 94 will stretch the coil spring 95. Therefore, when the medical staff stops pushing the lever 98, the connecting cylinder 94 and the limiting plate 96 will rotate in the opposite direction under the elastic force of the coil spring 95, thereby rotating the connecting seat b91 and the connector 92 back to their original positions and achieving reset.

[0053] After medical staff remove the forceps 1 from the endoscopic cavity, they need to take another container to hold the tissue block. To prevent the medical staff's hands from coming into contact with the tissue block, this utility model also has a sampling capsule 6 attached to the outer end of the forceps body tube 2 to hold the tissue block taken from the forceps 1, as detailed below. Figure 8 and Figure 9As shown: the sampling capsule 6 includes a transparent balloon 61, both ends of which are fixedly connected to transparent threaded tubes 62. The ends of the two threaded tubes 62 away from the balloon 61 are threaded with threaded caps 63. The inner diameter of the threaded tube 62 is larger than the outer diameter of the forceps body tubing 2, and the outer diameter of the threaded tube 62 is smaller than the inner diameter of the endoscope lumen. The two threaded tubes 62 are of different lengths. The longer threaded tube 62 needs to be inserted into the endoscope lumen inlet before use, and then the forceps head 1 and the forceps body tubing 2 are passed through the balloon 61 and the threaded tube 62 to complete the installation.

[0054] Furthermore, balloon 61 is machined with one side flat and the other side spherical, with the flat end facing the endoscope to save space and facilitate installation of balloon 61 into the endoscope lumen inlet. When the forceps body tubing 2 is withdrawn, since both balloon 61 and threaded tubing 62 are transparent, medical staff can observe the forceps head 1 moving into balloon 61. At this point, medical staff can remove balloon 61 from the endoscope lumen inlet, then with the spherical side of balloon 61 facing down, use the thumb to move the lever 98 to open the forceps head 1. Figure 8 As shown in the diagram, the tissue block being clamped will fall into the balloon 61. Then, the steel wire 4 can be pulled to control the clamp head 1 to close again, and the clamp head 1 and the clamp body tubing 2 can be pulled out from the balloon 61. Then, the threaded cap 63 can be screwed onto the outer end of the threaded tube 62, so that the collected tissue block can be placed inside the balloon 61 for easy delivery and isolation from the outside.

[0055] This invention, by placing the tissue block inside the balloon 61, allows medical personnel to directly take the balloon 61 containing the tissue block for testing. This design not only isolates medical personnel from the tissue block, preventing contamination of the material, but also saves on containers for holding the tissue, achieving two goals at once and further improving the practicality of this invention.

[0056] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A forceps for gastric cancer pathological tissue biopsy, comprising a forceps head (1), one end of which is connected to a forceps body flexible tube (2), and one end of which is connected to a handle (3). A steel wire (4) is provided inside the handle (3) and the forceps body flexible tube (2). The opening and closing of the forceps head (1) is achieved by controlling the movement of the steel wire (4) inside the handle (3). The forceps head (1) is characterized in that: The outer end of the pliers (1) is provided with a wire pull ring (5) that is connected to one end of the wire (4); A locking male head (8) is fixed inside one side of the wire pull ring (5). The locking male head (8) is located inside the handle (3). A locking female head (9) is rotatably connected inside the handle (3). When the control clamp head (1) is closed, the wire pull ring (5) pulls the wire (4) to move inside the handle (3) and drives one end of the locking male head (8) to be inserted into the locking female head (9) to achieve locking. The outer end of the forceps body tube (2) is fitted with a sampling capsule (6) for accommodating the tissue block in the forceps head (1), and one end of the sampling capsule (6) is inserted into the inlet of the endoscope lumen.

2. The gastric cancer pathological tissue biopsy forceps according to claim 1, characterized in that: The locking male connector (8) includes a connecting rod (81) located inside the handle (3). One end of the connecting rod (81) is fixed with a connecting seat a (82). The side of the connecting seat a (82) away from the connecting rod (81) is connected in a circular array with four limiting blocks (83). The limiting blocks (83) are machined with notches, and the end of the limiting blocks (83) away from the connecting seat a (82) is machined into a bevel. The locking female connector (9) includes a connecting seat b (91), which has four plugs (92) arranged in a ring array inside the connecting seat b (91). The end of the plug (92) away from the connecting seat b (91) is machined into a bevel, and the bevel of the end of the plug (92) has the same inclination angle as the bevel of the end of the connecting seat a (82). Two springs b (93) are fixed at the end of the plug (92) near the connecting seat b (91). One end of the springs b (93) is fixedly connected to the side wall of the connecting seat b (91). When the connecting rod (81) moves with the wire pull ring (5), it first pushes the plug (92) back into the side wall of the connecting seat b (91) through the limiting block (83), and then pushes the bottom end of the plug (92) into the notch of the limiting block (83) through the compressed springs b (93) to achieve locking.

3. The gastric cancer pathological tissue biopsy forceps according to claim 2, characterized in that: A connecting cylinder (94) is fixed on the side of the connecting seat b (91) away from the connecting seat a (82). A limiting plate (96) is fixed at one end of the connecting cylinder (94). The limiting plate (96) is embedded in the inner wall of the handle (3) to fix the position of the connecting seat b (91). A short rod (97) is fixed at the top of the limiting plate (96). The top of the short rod (97) passes through the handle (3) and is fixedly connected to a lever (98). By moving the lever (98) to rotate along the outer wall of the handle (3), the plug (92) is turned out from the notch of the limiting block (83) to release the locking of the male plug (8) and the female plug (9).

4. The gastric cancer pathological tissue biopsy forceps according to claim 3, characterized in that: The outer end of the connecting cylinder (94) is fitted with a coil spring (95). One end of the coil spring (95) is fixed to the outer wall of the connecting cylinder (94), and the other end of the coil spring (95) is fixed to the inner wall of the handle (3). It is used to pull the connecting seat b (91) and the plug (92) to reset after the toggle block (98) drives the connecting seat b (91) to rotate. The inner wall of the handle (3) is fixed with an annular plate (41), and a spring a (42) is fixed on one side of the annular plate (41). A circular plate (43) is fixed at the end of the spring a (42) away from the annular plate (41). The steel wire (4) passes through the circular plate (43) and is fixed to the circular plate (43). When the steel wire pull ring (5) pulls the steel wire (4) upward, it pulls the spring a (42) through the circular plate (43) to extend. After the connector (92) rotates out of the notch, the spring a (42) pulls the steel wire (4) downward and controls the pliers (1) to open.

5. The gastric cancer pathological tissue biopsy forceps according to claim 3, characterized in that: The handle (3) includes a hollow rod (31) fixed to one end of the clamp body hose (2), a rod head (32) is rotatably connected to one end of the hollow rod (31), and a thumb ring (33) for medical personnel to insert their thumb is fixed to the end of the rod head (32) away from the hollow rod (31). The outer diameter of the connecting seat a (82) and the outer diameter of the connecting seat b (91) are the same as the inner diameter of the hollow rod (31). The outer diameter of the limiting plate (96) is larger than the inner diameter of the hollow rod (31). The limiting plate (96) is embedded in the inner wall of the hollow rod (31).

6. The gastric cancer pathological tissue biopsy forceps according to claim 1, characterized in that: The sampling capsule (6) includes a transparent balloon (61), one side of which is machined into a plane and the other side into a spherical surface, so that the forceps (1) can open inside the balloon (61); Both ends of the balloon (61) are fixedly connected to transparent threaded tubes (62). The inner diameter of the threaded tube (62) is larger than the outer diameter of the forceps body hose (2), and the outer diameter of the threaded tube (62) is smaller than the inner diameter of the endoscope lumen. The two threaded tubes (62) are of different lengths. The longer threaded tube (62) is used to be inserted into the endoscope lumen. The ends of the two threaded tubes (62) away from the balloon (61) are threaded with threaded caps (63) to seal the tissue block inside the balloon (61).

7. The gastric cancer pathological tissue biopsy forceps according to claim 5, characterized in that: The wire pull ring (5) includes a pull ring seat (51) sleeved on the outside of the hollow rod (31). The pull ring seat (51) has a movable plate (52) fixed in the middle that slides in the inner wall of the hollow rod (31). Both sides of the movable plate (52) are machined with protrusions (53), and the protrusions (53) slide in the strip hole on the outer wall of the hollow rod (31).

8. The gastric cancer pathological tissue biopsy forceps according to claim 1, characterized in that: The outer wall of the forceps body hose (2) near the handle (3) is machined with a marking strip (7). When the front end of the forceps head (1) extends out of the endoscope lumen, the front end of the marking strip (7) moves to the endoscope lumen inlet position.

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