Biliary tract sampling device under endoscope

Abstract

The invention belongs to the technical field of biliary tract sampling devices, and particularly relates to an endoscopic biliary tract sampling device which comprises a catheter sheath and a sampling inner core, a PLC is fixedly connected to the outer wall of the catheter sheath, a sampling threaded piece is arranged on the surface of the sampling inner core, the sampling inner core is of a cone structure, and the sampling threaded piece is arranged on the outer wall of the catheter sheath. A connecting pipe is inserted into the catheter sheath, and guide cavities are formed in the connecting pipe and the sampling inner core. When the sampling device is used for sampling a diseased region in a bile duct, large pathological tissues can be taken out at a time, multiple times of sampling can be carried out after one-time positioning, enough detection samples can be provided for medical staff, the medical staff can conveniently carry out diversified detection on the diseased tissues, and the detection efficiency is improved. Therefore, an accurate detection result can be obtained, and the condition of a patient can be truly reflected.

Description

Technical Field

[0001] The invention belongs to the technical field of bile duct sampling devices, and in particular relates to an endoscopic bile duct sampling device. Background Art

[0002] At present, bile duct stenosis is a common sign in patients with obstructive jaundice undergoing endoscopic retrograde cholangiopancreatography (ERCP) diagnosis and treatment. The causes of bile duct stenosis include tumors, inflammation, infection, deformity, injury, etc. Endoscopic bile duct tissue sampling biopsy can clarify the benign or malignant nature of the lesion, and usually requires the use of a bile duct biopsy forceps or a cell brush. For example, a bile duct biopsy forceps is disclosed in patent publication number CN219439229U.

[0003] When the existing biliary biopsy forceps take samples from the bile duct, the bile duct at the lesion is relatively narrow, which makes it inconvenient to move the sampling device. The biopsy forceps can only take samples at the lower edge of the narrow section. The bile duct lesions are hard in texture, resulting in a small single sampling amount of the biopsy forceps. The sampling range and sampling amount are therefore limited and cannot cover the entire lesion. The insufficient representativeness of the sample leads to the inability to accurately reflect the actual condition during pathological examination. In addition, many testing items have minimum requirements for sample size, such as bile duct tissue gene testing, immunohistochemical staining, and microbial culture. A small sampling amount will result in too low a concentration of the test substance or an insufficient number of microorganisms, making it impossible to obtain accurate results, which is not conducive to precise individualized medical care. In addition, when taking samples, the biliary biopsy forceps need to repeatedly enter and exit the bile duct and reposition the sampling point, which has the disadvantages of complicated operation and long time consumption. It may also cause congestion and edema at the bile duct opening, increase the difficulty and risk of subsequent operations, and may cause additional pain to patients, such as bile duct perforation and increased risk of 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 bile duct sampling device in order to solve the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: an endoscopic bile duct sampling device, comprising a catheter sheath and a sampling inner core, the outer wall of the catheter sheath is fixedly connected to a PLC controller, the surface of the sampling inner core is provided with a sampling threaded sheet, the sampling inner core is a cone structure, a connecting tube is plugged into the interior of the catheter sheath, a guide cavity is provided inside the connecting tube and the sampling inner core, a guide wire is plugged 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 catheter sheath is an arc structure, and further comprises:

[0007] The sampling tube is arranged inside the outer sheath of the catheter, the inner wall of the outer sheath of the catheter is provided with a sliding groove matching the sampling tube, the sampling tube slides in the sliding groove, the inner wall of the sampling tube is fixedly connected with a baffle, and the side wall of the baffle is provided with a through hole matching the connecting tube;

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

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

[0010] The angle adjustment component is arranged at the end of the connecting tube extending out of the outer sheath of the catheter, and is connected with a control handle through the angle adjustment component.

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

[0012] Preferably, the limit assembly includes a limit groove provided on the upper side wall of the sampling barrel, the inner wall of the limit groove is fixedly connected to a limit ring, the limit pin is inserted in the limit ring, the groove wall of the sliding groove is provided with a card groove matching the limit pin, the lower end of the limit pin is fixedly connected to a lifting plate, two springs are fixedly connected between the lifting plate and the limit ring, the lower side wall of the limit ring is fixedly connected to an annular tube, the lower side tube wall of the annular tube is fixedly connected to two telescopic air bags, the upper ends of the two telescopic air bags are connected to the annular tube, the lower ends of the two telescopic air bags are fixedly connected to the lifting plate, the right side wall of the annular tube is fixedly connected to a ventilation pipe, the ventilation pipe is an inverted L-shaped structure, the lower end of the ventilation pipe passes through the sampling barrel and the baffle, and is connected to the annular groove.

[0013] Preferably, the angle adjustment assembly includes two adjusting disks, the two adjusting disks are respectively connected to the upper and lower side tube walls of the connecting tube extending out of the outer sheath of the catheter, the adjusting disk is rotatably connected to a rotating rod at the side wall away from the connecting tube, the rotating rod is fixedly connected to a positioning disk at one end away from the adjusting disk, a plurality of locking grooves are provided on the side wall of the positioning disk close to the adjusting disk, the inner walls of the locking grooves are fixedly connected to locking pins by springs, the side walls of the adjusting disk are provided with adjusting grooves matching the locking pins, the side walls of the two positioning disks away from each other are fixedly connected to support rods, and the ends of the two support rods away from each other are respectively fixedly connected to the side walls of the control handle.

[0014] Preferably, a mounting groove is provided on the left side wall of the baffle, a trigger switch is fixedly connected to the inner wall of the mounting groove, the trigger switch is electrically connected to the PLC controller, an elastic sealing gasket is fixedly connected to the left side wall of the baffle and the outer wall of the connecting tube is fixedly sleeved with a pressing plate.

[0015] Preferably, a transverse groove is provided on the left side wall of the sampling tube, a control switch is fixedly connected to the inner wall of the transverse groove, the control switch is electrically connected to the PLC controller, a sliding block is connected to the trigger part of the control switch, a retaining ring is fixedly connected to the inner wall of the transverse groove, and the left side wall of the retaining ring is fixedly connected to the sliding block through a spring.

[0016] Preferably, an outer wall fixed sleeve of the catheter sheath is provided with an operating ring, a plurality of rubber strips are fixedly connected to the outer wall of the operating ring, and a manual switch is fixedly connected to the outer wall of the catheter sheath.

[0017] Preferably, the lower side wall of the sampling tube is fixedly connected to a limiting slide plate, and the groove wall of the sliding groove is provided with a limiting sliding groove that matches the limiting slide plate.

[0018] Preferably, the side wall of the catheter outer sheath is slidably connected to an indicator tube via a slide rail, the tube wall of the connecting tube at one end extending out of the catheter outer sheath is fixedly connected to a scale plate, the scale plate is an inverted L-shaped structure, the upper side wall of the indicator tube is provided with an indicating port that matches the scale plate, and the upper side wall of the indicator tube is fixedly connected to an indicator mark.

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

[0020] 1. Through the provision of the catheter sheath, sampling inner core, PLC controller, sampling threaded piece, connecting tube, guide cavity, guide wire, and sampling tube, when using the sampling device to sample the lesion site inside the bile duct, a larger pathological tissue can be taken out at one time, and the sampling range can cover the entire course of the lesion. Moreover, after one-time positioning, multiple samplings can be performed, which can provide sufficient test samples for medical staff, facilitate medical staff to perform various tests on the lesion tissue, thereby obtaining accurate test results, truly reflecting the patient's condition, and reducing the difficulty and risk of bile duct sampling.

[0021] 2. By setting up the sealing component, after the sampled pathological tissue is taken out from the sampling device, the sealing of the sampling tube can be guaranteed, thus preventing external impurities from contaminating the pathological tissue, and further improving the detection accuracy of the pathological tissue.

[0022] 3. By setting the limit component, when sampling and testing the patient's bile duct lesion area, the connection stability between the sampling tube and the catheter sheath can be guaranteed. After the pathological tissue is extracted, the sampling tube and the catheter sheath are separated, which makes it convenient for medical staff to remove the sampling tube from the device for repeated sampling of pathological tissue. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 The present invention provides an endoscopic biliary sampling device. Figure 1 A magnified schematic diagram of part A;

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

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

[0027] Figure 5 It is a schematic diagram of the shape structure of an indicator tube and a scale plate in an endoscopic bile duct sampling device provided by the present invention;

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

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

[0030] Figure 8 The present invention provides an endoscopic biliary sampling device. Figure 7 A magnified schematic diagram of part B;

[0031] Fig. 9 It is a structural schematic diagram of a sealing component in an endoscopic bile duct sampling device provided by the present invention;

[0032] Fig.10 The present invention provides a schematic diagram of the position relationship of a trigger switch in an endoscopic biliary sampling device.

[0033] In the figure: 1 catheter sheath, 2 sampling inner core, 3 PLC controller, 4 sampling threaded sheet, 5 connecting tube, 6 guide cavity, 7 guide wire, 8 sampling tube, 9 sliding groove, 10 baffle, 11 perforation, 12 control handle, 13 sealing assembly, 131 sealing tube, 132 micro electric push rod, 14 piston plate, 15 annular groove, 16 rubber ring, 17 air supply pipe, 18 limit assembly, 181 limit ring, 182 limit pin, 19 limit groove, 20 card slot, 21 lifting plate, 22 annular tube, 23 telescopic air bag, 24 ventilation tube, 25 angle adjustment assembly, 251 adjustment disk, 252 rotating rod, 26 positioning disk, 27 positioning groove, 28 positioning pin, 29 adjustment groove, 30 support rod, 31 installation groove, 32 trigger switch, 33 elastic sealing pad, 34 horizontal groove, 35 control switch, 36 sliding block, 37 retaining ring, 38 operating ring, 39 rubber strip, 40 limit slide plate, 41 limit slide groove, 42 indicator tube, 43 scale plate, 44 indicator port, 45 indicator mark, 46 manual switch, 47 pressing disk. DETAILED DESCRIPTION

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

[0035] like Figure 1-Figure 10 As shown, an endoscopic bile duct sampling device includes a catheter sheath 1 and a sampling inner core 2, the outer wall of the catheter sheath 1 is fixedly connected to a PLC controller 3, the surface of the sampling inner core 2 is provided with a sampling thread sheet 4, the sampling inner core 2 is a cone structure, the inner part of the catheter sheath 1 is plugged with a connecting tube 5, the connecting tube 5 and the inner part of the sampling inner core 2 are both provided with a guide cavity 6, a guide wire 7 is plugged into the guide cavity 6, the left end of the connecting tube 5 is connected to the sampling inner core 2, and the end of the sampling inner core 2 extending out of the catheter sheath 1 is an arc structure, and also includes:

[0036] The 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. The side wall of the baffle 10 is provided with a through hole 11 which matches the connecting tube 5.

[0037] The sealing component 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 component 13 includes 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 with a micro-electric push rod 132. 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. The hole wall of the perforation 11 is provided with an annular groove 15. The inner wall of the perforation 11 is fixedly connected with 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 with 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. After the sampled pathological tissue is taken out of the sampling device, the sealing of the sampling cylinder 8 can be guaranteed to prevent external impurities from contaminating the pathological tissue, thereby further improving the detection accuracy of the pathological tissue.

[0038] The limiting assembly 18 is arranged on the upper side wall of the sampling tube 8 and is used to fix the position of the sampling tube 8. The limiting assembly 18 includes a limiting groove 19 opened 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 in the limiting ring 181. The groove wall of the sliding groove 9 is provided with a card groove 20 that 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 lower side wall of the limiting ring 181 is fixedly connected to an annular tube 22. The lower side tube wall of the annular tube 22 is fixedly connected to two telescopic gas The upper ends of the two telescopic airbags 23 are connected to the annular tube 22, and the lower ends of the two telescopic airbags 23 are fixedly connected to the lifting plate 21. The right side wall of the annular tube 22 is fixedly connected with a ventilation tube 24. The ventilation tube 24 is an inverted L-shaped structure. The lower end of the ventilation tube 24 passes through the sampling tube 8 and the baffle 10, and is connected to the annular groove 15. When sampling and testing the patient's bile duct lesion area, the connection stability between the sampling tube 8 and the catheter sheath 1 can be guaranteed. After the pathological tissue is extracted, the sampling tube 8 and the catheter sheath 1 are separated, which is convenient for medical staff to take out the sampling tube 8 from the device, so as to facilitate repeated sampling of pathological tissue;

[0039] The 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 the control handle 12 through the angle adjustment component 25. The angle adjustment component 25 includes two adjustment disks 251, and 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 adjusting disk 251 is rotatably connected to a rotating rod 252 away from the side wall of the connecting tube 5, and the rotating rod 252 is fixedly connected to a positioning disk 26 at one end away from the adjusting disk 251. The positioning disk 26 is provided with a plurality of positioning grooves 27 on the side wall close to the adjusting disk 251. The inner wall of the positioning groove 27 is fixedly connected with a positioning pin 28 through a spring. The side wall of the adjusting disk 251 is provided with an adjustment groove 29 matching the positioning pin 28. The side walls of the two positioning disks 26 away from each other are fixedly connected with a support rod 30. 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, so that the medical staff can adjust the placement angle of the control handle 12 and the guide wire 7 can pass through the connecting tube 5.

[0040] A mounting groove 31 is provided on the left side wall of the baffle 10, and a trigger switch 32 is fixedly connected to the inner wall of the mounting groove 31. The trigger switch 32 is electrically connected to the PLC controller 3. An elastic sealing pad 33 is fixedly connected to the left side wall of the baffle 10 and is covered on the outside of the trigger switch 32. A pressing plate 47 is fixedly sleeved on the outer wall of the connecting tube 5. When the pressing plate 47 squeezes the trigger switch 32, the limit assembly 18 will be controlled to work through the PLC controller 3.

[0041] A transverse groove 34 is provided on the left side wall of the sampling tube 8, and a control switch 35 is fixedly connected to the inner wall of the transverse groove 34. The control switch 35 is electrically connected to the PLC controller 3, and 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 transverse groove 34, and the left side wall of the retaining ring 37 is fixedly connected to the sliding block 36 through a spring. After the sampling tube 8 is moved to the set position, it will contact the baffle 10 and the connecting tube 5 to be relatively fixed.

[0042] An operating ring 38 is fixedly mounted on the outer wall of the catheter sheath 1 , and a plurality of rubber strips 39 are fixedly connected to the outer wall of the operating ring 38 . A manual switch 46 is fixedly connected to the outer wall of the catheter sheath 1 , so that medical staff can control the movement of the catheter sheath 1 .

[0043] The lower side wall of the sampling tube 8 is fixedly connected to the limiting slide 40, and the groove wall of the sliding groove 9 is provided with a limiting slide 41 that matches the limiting slide 40, which can guide the limiting pin 182 to align with the card slot 20 when repeatedly sampling the pathological tissue.

[0044] The side wall of the catheter sheath 1 is slidably connected to an indicator tube 42 through a slide rail, and the tube wall of the connecting tube 5 extending out of one end of the catheter sheath 1 is fixedly connected to a scale plate 43, and the scale plate 43 is an inverted L-shaped structure. The upper side wall of the indicator tube 42 is provided with an indicator port 44 that matches the scale plate 43, and the upper side wall of the indicator tube 42 is fixedly connected to an indicator mark 45, which is convenient for medical staff to judge the distance between the catheter sheath 1 and the sampling inner core 2 from the outside.

[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 from the hole of the ERCP side-view mirror, then inserts the sampling inner core 2 and the connecting tube 5 from the end of the guide wire 7, and follows the guide wire 7 through the stricture section of the bile duct. After the catheter sheath 1 enters the bile duct upstream of the stricture section through X-ray observation, the medical staff first rotates the control handle 12, and the control handle 12 drives the upper and lower positioning disks 26 to rotate through the upper and lower support rods 30, so that the positioning disk 26 drives the two lower locking pins 28 to rotate, and the medical staff 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 tube 5, and fixes the placement angle of the control handle 12 by the mutual cooperation of the positioning pin 28 and the adjusting groove 29 (the contact surface of the positioning pin 28 and the adjusting groove 29 is arc-shaped, and the positioning pin 28 can slide in the adjusting groove 29. When the catheter sheath 1 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 rotates the control handle 12 to push the connecting tube 5 inward, and The connecting pipe 5 drives the sampling inner core 2 to extend from the catheter outer sheath 1, so that the sampling inner core 2 is located in the bile duct upstream of the stenosis section. Then the medical staff pulls the catheter outer sheath 1 outward through the operating ring 38, so that the end of the catheter outer sheath 1 is located in the bile duct at the lower end of the stenosis section (the guidance between the indicator tube 42 and the scale plate 43 can assist the medical staff in judging the distance between the sampling inner core 2 and the catheter outer sheath 1, and the indicator tube 42 is slidably connected to the catheter outer sheath 1 through the slide rail, and the indicator tube 42 can be moved on the outside of the catheter outer sheath 1 along with the scale plate 43. 3 rotates), so that the lesion area of ​​the bile duct is located between the sampling inner core 2 and the catheter outer sheath 1, and then the medical staff rotates and pulls back the control handle 12, and the control handle 12 drives the sampling inner core 2 to rotate and move toward the direction of the catheter outer sheath 1 through the connecting tube 5. During the movement of the sampling inner core 2, the sharp edge of the outer sampling thread sheet 4 will cut the lesion area throughout the process, and the sampling inner core 2 will bring the cut pathological sample back to the sampling tube 8, thereby completing the first sampling of the pathological area;

[0046] After the sampling inner core 2 enters the sampling tube 8 as a whole, the connecting tube 5 will be squeezed to the trigger switch 32 through the pressing plate, and the trigger switch 32 will control the micro electric push rod 132 to work through the PLC controller 3, and the micro electric push rod 132 will drive the piston plate 14 to move downward, and use 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 supply pipe 17, and a part of the gas will make the rubber ring 16 on the outside of the annular groove 15 expand, and the rubber ring 16 will expand and squeeze to the connecting tube 5 inside the through hole 11, so as to block the through hole 11 on the surface of the baffle 10, so that the sampling tube 8 remains in a sealed state, and at the same time, a part of the gas will pass through the through hole 11. The trachea 24 is transported into the annular tube 22, and then transported into the two telescopic airbags 23 through the annular tube 22, so that the telescopic airbags 23 are inflated. The telescopic airbags 23 will drive the lifting plate 21 to move in the direction of the limiting groove 19, so that the lifting plate 21 drives the limiting pin 182 to disengage from the card groove 20, thereby releasing the mutual fixation between the sampling tube 8 and the outer sheath of the catheter 1. When the medical staff continues to pull the connecting tube 5, the connecting tube 5 will drive the sampling inner core 2 to push the baffle 10 and the sampling tube 8 to slide out of the sliding groove 9 toward the end of the outer sheath of the catheter 1. When the sampling tube 8 slides out of the outer sheath of the catheter 1, the medical staff can control the micro electric push rod 132 through the manual switch 46 to drive the piston plate 14 to move upward. Referring to the above principle, the rubber ring 16 will return to its initial state, thereby separating from the connecting tube 5. The medical staff can manually slide and separate the sampling tube 8 and the sampling inner core 2 to take out the pathological tissue, tissue fluid and blood inside the sampling tube 8. Then the operator continues to close the sampling inner core 2 and the sampling tube 8, and uses the pressing plate 47 to squeeze the trigger switch 32. Referring to the above principle, the sampling inner core 2 and the sampling tube 8 are restored to a relatively fixed relationship. Then, the limiting slide plate 40 on the lower side of the sampling tube 8 and the limiting slide groove 41 on the lower side of the sliding groove 9 are aligned. By pushing the connecting tube 5, the sampling tube 8 and the sampling inner core 2 are pushed to continue to move to the initial position in the catheter sheath 1. When the sampling tube 8 moves to the initial position, the sliding groove 9 The side wall will be squeezed to the control switch 35 through the squeezing sliding block 36, and the control switch 35 will control the micro-electric push rod 132 through the PLC controller 3 to drive the piston plate 14 to move upward, so that the gas inside the annular groove 15 and the telescopic airbag 23 will flow back into the sealing tube 131, and the lifting plate 21, under the action of the spring tension, will drive the limit pin 182 to insert into the card slot 20, so that the sampling tube 8 and the catheter outer sheath 1 can be fixed, and at the same time, the relative fixation between the baffle 10 and the connecting tube 5 is released, thereby releasing the relative fixation between the sampling inner core 2 and the sampling tube 8. According to the detection requirements, the above steps can be continued to repeat the sampling of pathological tissues to provide medical staff with sufficient detection samples.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in 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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