An endoscopic biliary sampling device

Abstract

The present invention belongs to the technical field of biliary sampling devices, and in particular relates to an endoscopic biliary sampling device, which includes an outer catheter sheath and a sampling inner core. A PLC controller is fixedly connected to the outer wall of the outer catheter sheath. Sampling thread pieces are provided on the surface of the sampling inner core. The sampling inner core is of a conical structure. A connecting tube is inserted into the inner part of the outer catheter sheath. Guide cavities are formed in both the connecting tube and the sampling inner core. When the sampling device of the present invention is used to sample the diseased part inside the bile duct, a relatively large pathological tissue can be taken out at one time, and multiple samplings can be carried out after one positioning, which can provide sufficient detection samples for medical staff, facilitate the medical staff to perform various detections on the diseased tissue, so as to obtain accurate detection results and truly reflect the patient's condition.

Description

Technical Field

[0001] The present invention belongs to the technical field of biliary sampling devices, and particularly relates to an endoscopic biliary sampling device. Background Art

[0002] Currently, bile duct stenosis is a common sign during the diagnosis and treatment of patients with obstructive jaundice by endoscopic retrograde cholangiopancreatography (ERCP). The causes of bile duct stenosis include tumors, inflammation, infections, malformations, injuries, etc. Endoscopic biliary tissue sampling biopsy can clarify the benign or malignant nature of the lesion. Usually, biliary biopsy forceps or cytology brushes are required. For example, a biliary biopsy forceps with the patent publication number CN219439229U.

[0003] When the existing biliary biopsy forceps sample the bile duct, due to the relatively narrow bile duct at the lesion site, it is inconvenient for the sampling device to move. The biopsy forceps can only sample at the lower edge of the narrow segment, and the hard texture of the bile duct lesion results in a small amount of sample taken by the biopsy forceps at one time. Therefore, the sampling range and the amount of sample are limited, and the whole picture of the lesion cannot be covered. The lack of sample representativeness leads to the inability to accurately reflect the true condition during pathological examination. In addition, many detection items have a minimum requirement for the sample amount, such as gene detection of bile duct tissue, immunohistochemical staining, microbial culture, etc. A small sample amount will result in too low concentration of the detected substance or insufficient number of microorganisms, making it impossible to obtain accurate results, which is not conducive to precise individualized medicine. Moreover, when the biliary biopsy forceps sample, it needs to repeatedly enter and exit the bile duct and reposition the sampling point, which has the disadvantages of complex operation and long time consumption. It may also cause congestion and edema at the bile duct opening, increasing the difficulty and risk of subsequent operations, and may bring additional pain to the patient, such as an increased risk of bile duct perforation and infection.

[0004] Therefore, an endoscopic biliary sampling device is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an endoscopic biliary sampling device for the above problems.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: An endoscopic biliary sampling device includes an outer catheter sheath and a sampling inner core. A PLC controller is fixedly connected to the outer wall of the outer catheter sheath. Sampling thread pieces are provided on the surface of the sampling inner core. The sampling inner core is a conical structure. A connecting tube is inserted into the inner part of the outer catheter sheath. Guide cavities are opened in both the connecting tube and the sampling inner core. A guide wire is inserted into the guide cavity. The left end of the connecting tube is connected to the sampling inner core. The end of the sampling inner core extending out of the outer catheter sheath is an arc structure. It further includes:

[0007] A sampling cylinder is arranged inside the outer sheath of the catheter. A sliding groove matching the sampling cylinder is provided on the inner wall of the outer sheath of the catheter. The sampling cylinder slides in the sliding groove. A baffle is fixedly connected to the inner wall of the sampling cylinder. A perforation matching the connecting pipe is provided on the side wall of the baffle.

[0008] A sealing assembly is arranged on the right side wall of the baffle to prevent tissue fluid and blood from flowing out through the perforation.

[0009] A limiting assembly is arranged on the upper side wall of the sampling cylinder for fixing the position of the sampling cylinder.

[0010] An angle adjustment assembly is arranged at the end of the connecting pipe extending out of the outer sheath of the catheter, and a control handle is connected through the angle adjustment assembly.

[0011] Preferably, the sealing assembly includes a sealing cylinder fixedly connected to the right side of the baffle. A micro electric push rod is fixedly connected to the upper side wall of the sealing cylinder. The moving end of the micro electric push rod passes through the sealing cylinder and is fixedly connected with a piston plate. An annular groove is provided on the hole wall of the perforation. A rubber ring arranged outside the annular groove is fixedly connected to the inner wall of the perforation. An air supply pipe is fixedly connected to the lower side wall of the sealing cylinder. The air supply pipe is of an inverted L-shaped structure, and the lower end of the air supply pipe communicates with the annular groove.

[0012] Preferably, the limiting assembly includes a limiting groove opened on the upper side wall of the sampling cylinder. A limiting ring is fixedly connected to the inner wall of the limiting groove. A limiting pin is inserted into the limiting ring. A clamping groove matching the limiting pin is opened on the groove wall of the sliding groove. A lifting plate is fixedly connected to the lower end of the limiting pin. Two springs are fixedly connected between the lifting plate and the limiting ring. An annular pipe is fixedly connected to the lower side wall of the limiting ring. Two telescopic air bags are fixedly connected to the lower side wall of the annular pipe. The upper ends of the two telescopic air bags are both communicated with the annular pipe. The lower ends of the two telescopic air bags are both fixedly connected to the lifting plate. A ventilation pipe is fixedly and communicatively connected to the right side wall of the annular pipe. The ventilation pipe is of an inverted L-shaped structure. The lower end of the ventilation pipe passes through the sampling cylinder and the baffle and communicates with the annular groove.

[0013] Preferably, the angle adjustment assembly includes two adjustment discs which are respectively connected to the upper and lower side walls of the connecting pipe extending out of the outer sheath of the catheter. A rotating rod is rotatably connected to the side wall of the adjustment disc far away from the connecting pipe. A positioning disc is fixedly connected to the end of the rotating rod far away from the adjustment disc. A plurality of clamping grooves are opened on the side wall of the positioning disc close to the adjustment disc. A clamping pin is fixedly connected to the inner wall of the clamping groove through a spring. An adjustment groove matching the clamping pin is opened on the side wall of the adjustment disc. Support rods are fixedly connected to the side walls of the two positioning discs far away from each other. The ends of the two support rods far away from each other are respectively fixedly connected to the side wall of the control handle.

[0014] Preferably, an installation groove is formed in the left side wall of the baffle, a trigger switch is fixedly connected to the inner wall of the installation groove, the trigger switch is electrically connected to the PLC controller, an elastic sealing pad covering the outside of the trigger switch is fixedly connected to the left side wall of the baffle, and a pressing disc is fixedly sleeved on the outer wall of the connecting pipe.

[0015] Preferably, a horizontal groove is formed in the left side wall of the sampling cylinder, a control switch is fixedly connected to the inner wall of the horizontal groove, the control switch is electrically connected to the PLC controller, a sliding block is connected to the triggering part of the control switch, a retaining ring is fixedly connected to the inner wall of the horizontal groove, and the left side wall of the retaining ring is fixedly connected to the sliding block through a spring.

[0016] Preferably, an operating ring is fixedly sleeved on the outer wall of the outer sheath of the catheter, a plurality of rubber strips are fixedly connected to the outer wall of the operating ring, and a manual control switch is fixedly connected to the outer wall of the outer sheath of the catheter.

[0017] Preferably, a limiting sliding plate is fixedly connected to the lower side wall of the sampling cylinder, and a limiting sliding groove matching the limiting sliding plate is formed in the groove wall of the sliding groove.

[0018] Preferably, an indicating cylinder is slidably connected to the side wall of the outer sheath of the catheter through a slide rail, a scale plate is fixedly connected to the pipe wall at one end of the connecting pipe extending out of the outer sheath of the catheter, the scale plate is of an inverted L-shaped structure, an indicating port matching the scale plate is formed in the upper side wall of the indicating cylinder, and an indicating mark is fixedly connected to the upper side wall of the indicating cylinder.

[0019] Compared with the existing technology, the advantages of an endoscopic biliary sampling device are as follows:

[0020] 1. By arranging the outer sheath of the catheter, the sampling inner core, the PLC controller, the sampling thread piece, the connecting pipe, the guiding cavity, the guide wire, and the sampling cylinder, when using the sampling device to sample the diseased part inside the bile duct, a relatively large pathological tissue can be taken out at one time, the sampling range can cover the whole process of the disease, and multiple samplings can be carried out after one positioning, which can provide sufficient detection samples for medical staff, facilitate the medical staff to perform various detections on the diseased tissue, so as to obtain accurate detection results, truly reflect the patient's condition, and reduce the difficulty and risk of biliary sampling.

[0021] 2. By arranging the sealing assembly, after taking out the sampled pathological tissue from the sampling device, the sealing performance of the sampling cylinder can be ensured, preventing external impurities from contaminating the pathological tissue, and further improving the detection accuracy of the pathological tissue.

[0022] 3. Through the provided limit component, when sampling and detecting the diseased area of the patient's bile duct, the connection stability between the sampling cylinder and the catheter outer sheath can be ensured. After extracting the pathological tissue, the sampling cylinder and the catheter outer sheath are separated, facilitating the medical staff to take out the sampling cylinder from the device for repeated sampling of the pathological tissue. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of an endoscopic biliary sampling device provided by the present invention;

[0024] Figure 2 is an endoscopic biliary sampling device provided by the present invention Figure 1 an enlarged schematic diagram of part A therein;

[0025] Figure 3 is a schematic diagram of the positional relationship between the guiding cavity and the guide wire in an endoscopic biliary sampling device provided by the present invention;

[0026] Figure 4 is a schematic structural diagram of an angle adjustment component in an endoscopic biliary sampling device provided by the present invention;

[0027] Figure 5 is a schematic diagram of the shape structure of the indicating cylinder and the scale plate in an endoscopic biliary sampling device provided by the present invention;

[0028] Figure 6 is a schematic diagram of the shape structure of the sampling inner core and the sampling thread piece in an endoscopic biliary sampling device provided by the present invention;

[0029] Figure 7 is a schematic diagram of the surface structure of the baffle in an endoscopic biliary sampling device provided by the present invention;

[0030] Figure 8 is an endoscopic biliary sampling device provided by the present invention Figure 7 an enlarged schematic diagram of part B therein;

[0031] Figure 9 is a schematic structural diagram of a sealing component in an endoscopic biliary sampling device provided by the present invention;

[0032] Figure 10 is a schematic diagram of the positional relationship of the trigger switch in an endoscopic biliary sampling device provided by the present invention.

[0033] In the figure: 1 catheter outer sheath, 2 sampling inner core, 3 PLC controller, 4 sampling thread piece, 5 connecting pipe, 6 guiding cavity, 7 guide wire, 8 sampling cylinder, 9 sliding groove, 10 baffle, 11 perforation, 12 control handle, 13 sealing assembly, 131 sealing cylinder, 132 micro electric push rod, 14 piston plate, 15 annular groove, 16 rubber ring, 17 air supply pipe, 18 limiting assembly, 181 limiting ring, 182 limiting pin, 19 limiting groove, 20 clamping groove, 21 lifting plate, 22 annular pipe, 23 telescopic airbag, 24 ventilation pipe, 25 angle adjusting assembly, 251 adjusting disc, 252 rotating rod, 26 positioning disc, 27 clamping position groove, 28 clamping position pin, 29 adjusting groove, 30 support rod, 31 mounting groove, 32 trigger switch, 33 elastic sealing pad, 34 transverse groove, 35 control switch, 36 sliding block, 37 retaining ring, 38 operating ring, 39 rubber strip, 40 limiting slide plate, 41 limiting slide groove, 42 indicating cylinder, 43 scale plate, 44 indicating port, 45 indicating mark, 46 manual control switch, 47 pressing disc. Detailed implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0035] As Figures 1 - 10 shown, an endoscopic biliary sampling device includes a catheter outer sheath 1 and a sampling inner core 2. A PLC controller 3 is fixedly connected to the outer wall of the catheter outer sheath 1. Sampling thread pieces 4 are arranged on the surface of the sampling inner core 2. The sampling inner core 2 is of a conical structure. A connecting pipe 5 is inserted into the inside of the catheter outer sheath 1. Guiding cavities 6 are opened in both the connecting pipe 5 and the sampling inner core 2. A guide wire 7 is inserted into the guiding cavity 6. The left end of the connecting pipe 5 is connected to the sampling inner core 2. The end of the sampling inner core 2 extending out of the catheter outer sheath 1 is of an arc structure. It further includes:

[0036] A sampling cylinder 8 is arranged inside the catheter outer sheath 1. A sliding groove 9 matching the sampling cylinder 8 is opened on the inner wall of the catheter outer sheath 1. The sampling cylinder 8 slides in the sliding groove 9. A baffle 10 is fixedly connected to the inner wall of the sampling cylinder 8. A perforation 11 matching the connecting pipe 5 is opened on the side wall of the baffle 10;

[0037] The sealing assembly 13 is arranged on the right side wall of the baffle 10. In order to prevent tissue fluid and blood from flowing out of the perforation 11, the sealing assembly 13 includes a sealing cylinder 131 fixedly connected to the right side of the baffle 10. A micro electric push rod 132 is fixedly connected to the upper side wall of the sealing cylinder 131. The moving end of the micro electric push rod 132 passes through the sealing cylinder 131 and is fixedly connected with a piston plate 14. An annular groove 15 is formed in the hole wall of the perforation 11, and a rubber ring 16 arranged outside the annular groove 15 is fixedly connected to the inner wall of the perforation 11. A gas delivery pipe 17 is fixedly connected to the lower side wall of the sealing cylinder 131. The gas delivery pipe 17 is of an inverted L-shaped structure, and the lower end of the gas delivery pipe 17 is communicated with the annular groove 15. After the sampled pathological tissue is taken out of the sampling device, the sealing performance of the sampling cylinder 8 can be ensured, preventing external impurities from contaminating the pathological tissue and further improving the detection accuracy of the pathological tissue;

[0038] The limiting assembly 18 is arranged on the upper side wall of the sampling cylinder 8 and is used for fixing the position of the sampling cylinder 8. The limiting assembly 18 includes a limiting groove 19 formed in the upper side wall of the sampling cylinder 8. A limiting ring 181 is fixedly connected to the inner wall of the limiting groove 19. A limiting pin 182 is inserted into the limiting ring 181. A clamping groove 20 matching with the limiting pin 182 is formed in the groove wall of the sliding groove 9. A lifting plate 21 is fixedly connected to the lower end of the limiting pin 182. Two springs are fixedly connected between the lifting plate 21 and the limiting ring 181. An annular pipe 22 is fixedly connected to the lower side wall of the limiting ring 181. Two telescopic air bags 23 are fixedly connected to the lower side wall of the annular pipe 22. The upper ends of the two telescopic air bags 23 are communicated with the annular pipe 22, and the lower ends of the two telescopic air bags 23 are fixedly connected to the lifting plate 21. A ventilation pipe 24 is fixedly communicated with the right side wall of the annular pipe 22. The ventilation pipe 24 is of an inverted L-shaped structure, and the lower end of the ventilation pipe 24 passes through the sampling cylinder 8 and the baffle 10 and is communicated with the annular groove 15. When sampling and detecting the bile duct lesion area of a patient, the connection stability between the sampling cylinder 8 and the catheter outer sheath 1 can be ensured. After the pathological tissue is extracted, the sampling cylinder 8 is separated from the catheter outer sheath 1, which is convenient for medical staff to take out the sampling cylinder 8 from the device, facilitating repeated sampling of the pathological tissue;

[0039] The angle adjustment assembly 25 is arranged at the end of the connecting tube 5 extending out of the catheter outer sheath 1, and a control handle 12 is connected through the angle adjustment assembly 25. The angle adjustment assembly 25 includes two adjustment discs 251, and the two adjustment discs 251 are respectively connected to the upper and lower side walls of the connecting tube 5 extending out of the catheter outer sheath 1. A rotating rod 252 is rotatably connected to the side wall of the adjustment disc 251 away from the connecting tube 5. One end of the rotating rod 252 away from the adjustment disc 251 is fixedly connected with a positioning disc 26. A plurality of clamping grooves 27 are formed in the side wall of the positioning disc 26 close to the adjustment disc 251. A clamping pin 28 is fixedly connected to the inner wall of the clamping groove 27 through a spring. An adjustment groove 29 matching the clamping pin 28 is formed in the side wall of the adjustment disc 251. Support rods 30 are fixedly connected to the side walls of the two positioning discs 26 away from each other. The ends of the two support rods 30 away from each other are respectively fixedly connected to the side wall of the control handle 12, which is convenient for medical staff to adjust the placement angle of the control handle 12 and convenient for the guide wire 7 to pass through the connecting tube 5.

[0040] An installation groove 31 is formed in the left side wall of the baffle 10. A trigger switch 32 is fixedly connected to the inner wall of the installation groove 31. The trigger switch 32 is electrically connected to the PLC controller 3. An elastic sealing pad 33 covering the outside of the trigger switch 32 is fixedly connected to the left side wall of the baffle 10. A pressing disc 47 is fixedly sleeved on the outer wall of the connecting tube 5. When the pressing disc 47 presses the trigger switch 32, the limit assembly 18 will be controlled to work through the PLC controller 3.

[0041] A horizontal groove 34 is formed in the left side wall of the sampling cylinder 8. A control switch 35 is fixedly connected to the inner wall of the horizontal groove 34. The control switch 35 is electrically connected to the PLC controller 3. A sliding block 36 is connected to the triggering part of the control switch 35. A retaining ring 37 is fixedly connected to the inner wall of the horizontal groove 34. The left side wall of the retaining ring 37 is fixedly connected to the sliding block 36 through a spring. After the sampling cylinder 8 is moved to the set position, the relative fixation between the baffle 10 and the connecting tube 5 will be achieved.

[0042] An operation ring 38 is fixedly sleeved on the outer wall of the catheter outer sheath 1. A plurality of rubber strips 39 are fixedly connected to the outer wall of the operation ring 38. A manual control switch 46 is fixedly connected to the outer wall of the catheter outer sheath 1, which is convenient for medical staff to control the movement of the catheter outer sheath 1.

[0043] A limit sliding plate 40 is fixedly connected to the lower side wall of the sampling cylinder 8. A limit sliding groove 41 matching the limit sliding plate 40 is formed in the groove wall of the sliding groove 9. When repeatedly sampling pathological tissues, it can guide the limit pin 182 to align with the card slot 20.

[0044] The side wall of the outer sheath 1 of the catheter is slidably connected with an indicating cylinder 42 through a slide rail. One end of the connecting pipe 5 extending out of the wall of the outer sheath 1 of the catheter is fixedly connected with a scale plate 43. The scale plate 43 is of an inverted L-shaped structure. An indicating opening 44 matching the scale plate 43 is formed in the upper side wall of the indicating cylinder 42. An indicating mark 45 is fixedly connected to the upper side wall of the indicating cylinder 42, which is convenient for medical staff to judge the distance between the outer sheath 1 of the catheter and the sampling inner core 2 outside the body.

[0045] The operating principle of the present invention is described as follows: The medical staff inserts the guide wire 7 into the patient's bile duct through the channel of the ERCP side-view endoscope, and then inserts the sampling inner core 2 and the connecting pipe 5 from the end of the guide wire 7 and follows the guide wire 7 through the bile duct stricture segment. After observing through X-ray that the outer sheath 1 of the catheter enters the bile duct upstream of the stricture segment, the medical staff first rotates the control handle 12. The control handle 12 will drive the positioning disks 26 on the upper and lower sides to rotate through the support rods 30 on the upper and lower sides, so that the positioning disks 26 drive the two clamping pins 28 on the lower side to rotate. The medical staff rotates the control handle 12 to make the control handle 12 rotate to a position aligned with the end of the connecting pipe 5, and fixes the placement angle of the control handle 12 through the mutual cooperation of the clamping pin 28 and the adjustment groove 29 (the contact surface between the clamping pin 28 and the adjustment groove 29 is arc-shaped, and the clamping pin 28 can slide in the adjustment groove 29. When the outer sheath 1 of the catheter moves along the guide wire 7, the control handle 12 rotates to one side to facilitate the extension of the guide wire 7). Then, the medical staff pushes the connecting pipe 5 inward by rotating the control handle 12, drives the sampling inner core 2 to extend out of the outer sheath 1 of the catheter through the connecting pipe 5, so that the sampling inner core 2 is located in the bile duct upstream of the stricture segment. Then, the medical staff pulls the outer sheath 1 of the catheter outward by operating the ring 38, so that the end of the outer sheath 1 of the catheter is located in the bile duct at the lower end of the stricture segment (through the guiding effect between the indicating cylinder 42 and the scale plate 43, it can assist the medical staff to judge the distance between the sampling inner core 2 and the outer sheath 1 of the catheter, and the indicating cylinder 42 is slidably connected with the outer sheath 1 of the catheter through a slide rail, and the indicating cylinder 42 can rotate on the outside of the outer sheath 1 of the catheter along with the rotation of the scale plate 43), so that the diseased area of the bile duct is located between the sampling inner core 2 and the outer sheath 1 of the catheter. Then, the medical staff rotates and pulls back the control handle 12. The control handle 12 drives the sampling inner core 2 to rotate and move toward the outer sheath 1 of the catheter through the connecting pipe 5. During the movement of the sampling inner core 2, the sharp edge of the sampling thread piece 4 on the outside will cut the diseased area throughout the process, and the sampling inner core 2 will bring the cut pathological sample back into the sampling cylinder 8, thus completing the first sampling of the pathological area;

[0046] After the entire sampling core 2 enters the sampling cylinder 8, the connecting pipe 5 will squeeze the trigger switch 32 through the pressing plate. The trigger switch 32 will control the operation of the micro electric push rod 132 through the PLC controller 3. The micro electric push rod 132 will drive the piston plate 14 to move downward, using the piston plate 14 to squeeze the gas below, so that the air pressure below the piston plate 14 enters the annular groove 15 through the air delivery pipe 17. Part of the gas will cause the rubber ring 16 outside the annular groove 15 to expand. The rubber ring 16 will expand and squeeze the connecting pipe 5 inside the through hole 11, thereby blocking the through hole 11 on the surface of the baffle 10 and keeping the sampling cylinder 8 in a sealed state. At the same time, part of the gas will be transported to the annular pipe 22 through the ventilation pipe 24 and then transported to the two telescopic air bags 23 through the annular pipe 22, causing the telescopic air bags 23 to inflate and expand. The telescopic air bags 23 will drive the lifting plate 21 to move towards the limiting groove 19, causing the lifting plate 21 to drive the limiting pin 182 to disengage from the clamping groove 20, thereby releasing the mutual fixation between the sampling cylinder 8 and the catheter outer sheath 1. When the medical staff continues to pull the connecting pipe 5, the connecting pipe 5 will drive the sampling core 2 to push the baffle 10 and the sampling cylinder 8 to slide out towards the end of the catheter outer sheath 1 in the sliding groove 9. After the sampling cylinder 8 slides out of the catheter outer sheath 1, the medical staff can control the micro electric push rod 132 to drive the piston plate 14 to move upward through the manual control switch 46. Referring to the above principle, the rubber ring 16 will return to its initial state and thus separate from the connecting pipe 5. The medical staff can manually slide and separate the sampling cylinder 8 and the sampling core 2 to take out the pathological tissue, tissue fluid and blood inside the sampling cylinder 8. Then the operator continues to close the sampling core 2 and the sampling cylinder 8, uses the pressing disc 47 to squeeze the trigger switch 32, and referring to the above principle, makes the sampling core 2 and the sampling cylinder 8 return to a relatively fixed relationship. Then align the limiting slide plate 40 below the sampling cylinder 8 and the limiting slide groove 41 below the sliding groove 9, and push the sampling cylinder 8 and the sampling core 2 to continue moving towards the initial position in the catheter outer sheath 1 by pushing the connecting pipe 5. When the sampling cylinder 8 moves to the initial position, the side wall of the sliding groove 9 will squeeze the control switch 35 by squeezing the sliding block 36. The control switch 35 will control the micro electric push rod 132 to drive the piston plate 14 to move upward through the PLC controller 3, so that the gas inside the annular groove 15 and the telescopic air bag 23 flows back into the sealing cylinder 131. Under the action of the spring tension, the lifting plate 21 will drive the limiting pin 182 to insert into the clamping groove 20, which can fix the sampling cylinder 8 and the catheter outer sheath 1, and at the same time release the relative fixation between the baffle 10 and the connecting pipe 5, thereby releasing the relative fixation between the sampling core 2 and the sampling cylinder 8. According to the detection requirements, the above steps can be continued to repeatedly sample the pathological tissue to provide sufficient detection samples for the medical staff.

[0047] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An endoscopic bile duct sampling device, comprising a catheter sheath (1) and a sampling core (2), wherein the outer wall of the catheter sheath (1) is fixedly connected to a PLC controller (3), the surface of the sampling core (2) is provided with a sampling thread sheet (4), the sampling core (2) is a cone structure, a connecting tube (5) is inserted into the interior of the catheter sheath (1), a guide cavity (6) is provided in the interior of the connecting tube (5) and the sampling core (2), a guide wire (7) is inserted into the guide cavity (6), the left end of the connecting tube (5) is connected to the sampling core (2), the end of the sampling core (2) extending out of the catheter sheath (1) is an arc structure, and is characterized in that: Also includes: A sampling tube (8) is arranged inside the outer sheath of the catheter (1), the inner wall of the outer sheath of the catheter (1) is provided with a sliding groove (9) which matches the sampling tube (8), the sampling tube (8) slides in the sliding groove (9), the inner wall of the sampling tube (8) is fixedly connected with a baffle (10), and the side wall of the baffle (10) is provided with a through hole (11) which matches the connecting tube (5); A sealing component (13) is arranged on the right side wall of the baffle (10) to prevent tissue fluid and blood from flowing out of the perforation (11); A limiting assembly (18), arranged on the upper side wall of the sampling cylinder (8) and used for fixing the position of the sampling cylinder (8); An angle adjustment component (25) is arranged at the end of the connecting tube (5) extending out of the catheter sheath (1), and is connected to a control handle (12) via the angle adjustment component (25).

2. An endoscopic biliary sampling device according to claim 1, characterized in that: The sealing assembly (13) comprises a sealing cylinder (131) fixedly connected to the right side of the baffle (10); the upper side wall of the sealing cylinder (131) is fixedly connected to a micro electric push rod (132); the movable end of the micro electric push rod (132) passes through the sealing cylinder (131) and is fixedly connected to a piston plate (14); the hole wall of the through hole (11) is provided with an annular groove (15); the inner wall of the through hole (11) is fixedly connected to a rubber ring (16) arranged on the outside of the annular groove (15); the lower side wall of the sealing cylinder (131) is fixedly connected to an air supply pipe (17); the air supply pipe (17) is an inverted L-shaped structure; the lower end of the air supply pipe (17) is connected to the annular groove (15).

3. An endoscopic biliary sampling device according to claim 2, characterized in that: The limiting assembly (18) comprises a limiting groove (19) provided on the upper side wall of the sampling tube (8); the inner wall of the limiting groove (19) is fixedly connected to a limiting ring (181); a limiting pin (182) is inserted into the limiting ring (181); the groove wall of the sliding groove (9) is provided with a clamping groove (20) which matches the limiting pin (182); the lower end of the limiting pin (182) is fixedly connected to a lifting plate (21); two springs are fixedly connected between the lifting plate (21) and the limiting ring (181); the limiting ring (181) is provided with a spring to prevent the limiting pin (182) from sliding; The lower side wall is fixedly connected to an annular tube (22), and the lower side tube wall of the annular tube (22) is fixedly connected to two telescopic airbags (23), the upper ends of the two telescopic airbags (23) are both connected to the annular tube (22), and the lower ends of the two telescopic airbags (23) are both fixedly connected to the lifting plate (21), and the right side wall of the annular tube (22) is fixedly connected to a ventilation pipe (24), and the ventilation pipe (24) is an inverted L-shaped structure, and the lower end of the ventilation pipe (24) passes through the sampling tube (8) and the baffle (10), and is connected to the annular groove (15).

4. The endoscopic biliary sampling device according to claim 1, characterized in that: The angle adjustment assembly (25) comprises two adjustment disks (251), the two adjustment disks (251) are respectively connected to the upper and lower side tube walls of the connecting tube (5) extending out of the catheter sheath (1), the side wall of the adjustment disk (251) away from the connecting tube (5) is rotatably connected to a rotating rod (252), one end of the rotating rod (252) away from the adjustment disk (251) is fixedly connected to a positioning disk (26), a side wall of the positioning disk (26) close to the adjustment disk (251) is provided with a plurality of locking grooves (27), the inner wall of the locking groove (27) is fixedly connected to a locking pin (28) through a spring, the side wall of the adjustment disk (251) is provided with an adjustment groove (29) matching the locking pin (28), the side walls of the two positioning disks (26) away from each other are fixedly connected to a support rod (30), and the ends of the two support rods (30) away from each other are respectively fixedly connected to the side walls of the control handle (12).

5. The endoscopic biliary sampling device according to claim 1, characterized in that: The left side wall of the baffle (10) is provided with a mounting groove (31), the inner wall of the mounting groove (31) is fixedly connected with a trigger switch (32), the trigger switch (32) is electrically connected to the PLC controller (3), the left side wall of the baffle (10) is fixedly connected with an elastic sealing pad (33) which is arranged on the outside of the trigger switch (32), and the outer wall of the connecting pipe (5) is fixedly sleeved with a pressing plate (47).

6. The endoscopic biliary sampling device according to claim 1, characterized in that: The left side wall of the sampling tube (8) is provided with a transverse groove (34), the inner wall of the transverse groove (34) is fixedly connected with a control switch (35), the control switch (35) is electrically connected to the PLC controller (3), the triggering part of the control switch (35) is connected with a sliding block (36), the inner wall of the transverse groove (34) is fixedly connected with a retaining ring (37), and the left side wall of the retaining ring (37) is fixedly connected to the sliding block (36) via a spring.

7. The endoscopic biliary sampling device according to claim 1, characterized in that: The outer wall of the catheter sheath (1) is fixedly sleeved with an operating ring (38), the outer wall of the operating ring (38) is fixedly connected to a plurality of rubber strips (39), and the outer wall of the catheter sheath (1) is fixedly connected to a manual switch (46).

8. The endoscopic biliary sampling device according to claim 1, characterized in that: The lower side wall of the sampling tube (8) is fixedly connected to a limiting slide plate (40), and the groove wall of the sliding groove (9) is provided with a limiting sliding groove (41) that matches the limiting slide plate (40).

9. The endoscopic biliary sampling device according to claim 1, characterized in that: The side wall of the catheter outer sheath (1) is slidably connected to an indicator tube (42) via a slide rail, the tube wall of the connecting tube (5) at one end extending out of the catheter outer sheath (1) is fixedly connected to a scale plate (43), the scale plate (43) is an inverted L-shaped structure, the upper side wall of the indicator tube (42) is provided with an indicating port (44) matching the scale plate (43), and the upper side wall of the indicator tube (42) is fixedly connected to an indicating mark (45).

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