Bile duct stone extractor

Abstract

The invention discloses a bile duct stone extractor, and relates to the technical field of medical auxiliary instruments, the bile duct stone extractor comprises a first external connection pipe and a second external connection pipe, the outer side of the second external connection pipe is fixedly connected with a storage shell, and a picking assembly is arranged between the first external connection pipe and the second external connection pipe; the picking assembly comprises clamping plates symmetrically and movably connected to the outer side of the second external connecting pipe, a first pull rod in the picking assembly pulls the clamping plates away from the clamping plates to drive a third pull rod to move, the two clamping plates are opened and loosened, then the clamping plates are recycled under the action of a third spring to clamp stones, operation is easy and convenient, and the clamping action can be accurately controlled; then the second pull rod is pulled to drive the fourth pull rod to move, and the stone can be flexibly moved into the second external pipe; and finally, the first pull rod is pulled to open the clamping plate, the calculus smoothly falls off, tedious operations such as placement of a calculus bag are not needed in the whole process, calculus picking and transferring can be efficiently completed, convenience is provided for subsequent calculus collection, and the calculus picking efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment, and in particular to a bile duct lithotripsy. Background Art

[0002] Bile duct stones are stones formed in the bile duct system. The causes are diverse and are related to bile stasis, biliary infection, abnormal cholesterol metabolism, etc. Once formed, the stones will block the bile duct, hinder the flow of bile, and cause colic in the upper abdomen or right upper abdomen, accompanied by nausea, vomiting, fever, jaundice and other symptoms. If not treated in time, it may induce serious complications such as acute cholangitis and biliary pancreatitis. In terms of treatment, stones smaller than 1 cm and without lesions can be treated conservatively; stones larger than 1 cm are recommended for surgery. The surgery often uses laparoscopic technology to make a small incision in the patient's abdomen and affected area. Depending on the size of the stone, such as complete stones, incomplete stones or sand-like stones, it is removed by grasping or suction.

[0003] For stones that are not completely expelled during extracorporeal lithotripsy and stones of special shapes and sizes such as sand, the operation of removing the stones during laparoscopic surgery is more complicated. During the operation, a stone bag must be placed first, and then the removed stones are placed in the stone bag. Then, the stone bag and the stones are removed from the body through a specific channel. Near the end of the operation, the stone bag must be carefully pulled out, and the entire stone removal process is completed. The process is relatively complicated, so a bile duct lithotripter is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the existing technology that a stone bag needs to be placed first during surgery, and then the removed stones are placed in the stone bag, and then the stone bag and the stones are taken out of the body through a specific channel. When the operation is about to end, the stone bag needs to be carefully pulled out, and the entire stone removal process is completed. The process is relatively cumbersome.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A bile duct stone remover comprises a first external tube and a second external tube, the outer side of the second external tube is fixedly connected to a storage shell, a picking assembly is commonly provided between the first external tube and the second external tube, the picking assembly comprises a splint, a third pull rod and a fourth pull rod, a third spring, which are symmetrically and movably connected on the outer side of the second external tube, and a first pull rod and a second pull rod movably connected inside the first external tube, the first pull rod is pulled away from the splint, driving the third pull rod to move, thereby causing the two splints to open to both sides, after releasing the first pull rod, the splint that loses external force control is retracted inwardly under the action of the third spring, thereby clamping the stone, pulling the second pull rod away from the splint, driving the fourth pull rod to move, thereby allowing the stone clamped on the splint to be released. Move to the inside of the second external tube, pull the first pull rod again, and the third pull rod will cause the splint to open outward to loosen the stone, and the stone will fall into the second external tube. A storage assembly is provided inside the second external tube, and the storage assembly includes threaded leaves and a rotating shell, a slider that are rotatably connected inside the second external tube, and a rotating slide opened on the inside of the rotating shell and a first spring that is movably connected inside the first external tube. After the splint is loosened to allow the stone to fall therein, the fourth pull rod first drives the slider to slide in the horizontal groove of the rotating slide, and then the first spring rebounds and pushes the fourth pull rod back into position. During the returning process, the fourth pull rod drives the slider to slide in the arc groove of the rotating slide, prompting the rotating shell to rotate, and the rotating rotating shell drives the threaded leaves to rotate, and then the stones are collected in the storage shell.

[0006] The above technical solution further includes: The first external tube is threadedly connected to the second external tube, the second pull rod is threadedly connected to the fourth pull rod, the first pull rod is threadedly connected to the third pull rod, and the first external tube and the second external tube are rotated with each other and are combined together.

[0007] The end of the second pull rod away from the splint is fixedly connected to the first block, and the end of the first pull rod away from the splint is fixedly connected to the second block. The first spring and the second pull rod are fixedly connected. By pulling the second block, the second block pulls the first pull rod.

[0008] A cylindrical groove is formed inside the second pull rod, and a second spring is fixedly connected inside the cylindrical groove. The second spring is fixedly connected to the first pull rod, and the second spring returns the first pull rod to its original position.

[0009] The inner sides of the second external tube, the first external tube, the fourth pull rod and the second pull rod are symmetrically provided with first limiting grooves, and the outer sides of the fourth pull rod, the second pull rod and the first pull rod and the third pull rod are symmetrically fixedly connected with limiting plates, and the two limiting plates are slidably connected to the first limiting grooves. The first limiting grooves limit the sliding position of the limiting plates, so that the second pull rod and the fourth pull rod slide within a certain range.

[0010] The first pull rod is slidably connected to the second pull rod, the third pull rod is movably connected to the fourth pull rod, and the end of the fourth pull rod away from the second block is movably connected to the splint. The second pull rod is pulled away from the splint to drive the fourth pull rod to follow the movement.

[0011] The fourth pull rod is symmetrically fixedly connected to a fixed block at one end close to the splint, and ropes are movably connected to the outer sides of the two fixed blocks. The ropes are fixedly connected to the third pull rod, and the first pull rod pulls the third pull rod away from the splint to follow the movement.

[0012] One end of the rope away from the third pull rod is fixedly connected to the clamping plate, and the third spring is fixedly connected to the clamping plate. The pulling of the rope causes the two clamping plates to open outwards.

[0013] A rubber pad is fixedly connected to the inside of the second external tube, the rubber pad is movably connected to the fourth pull rod, the fourth pull rod is movably connected to the rotating shell, the rotating shell is fixedly connected to the threaded leaf, and the fourth pull rod drives the slider to slide in the horizontal groove on the rotating slide.

[0014] A second limiting groove is provided inside the fourth pull rod, a fourth spring is fixedly connected inside the second limiting groove, the fourth spring is fixedly connected to the second limiting groove, the slider is slidably connected to the second limiting groove, the slider is slidably connected to the rotating slide groove, and the fourth pull rod drives the slider to slide in the arc groove on the rotating slide groove to rotate the rotating shell.

[0015] The present invention has the following beneficial effects: 0. In the present invention, the first pull rod in the picking assembly is pulled away from the splint to drive the third pull rod to move, so that the two splints are opened. After loosening, the splint is recovered and clamped by the third spring. The operation is simple and the clamping action can be accurately controlled; then the second pull rod is pulled to drive the fourth pull rod to move, and the stone can be flexibly moved to the second external tube; finally, the first pull rod is pulled again to open the splint, and the stone falls smoothly. The whole process does not require tedious operations such as inserting a stone bag, and can efficiently complete the picking and transfer of stones, provide convenience for subsequent stone collection, and effectively improve the efficiency of stone removal.

[0016] 1. In the present invention, after the splint in the storage assembly is loosened to allow the stone to fall into the second external tube, the fourth pull rod drives the slider to slide in the horizontal groove of the rotating slide groove, and then is pushed back to its position by the rebound of the first spring. The slider slides in the arc groove to rotate the rotating shell, and then drives the threaded leaves to rotate, which can automatically collect the stones into the storage shell without the need for additional complicated operations. It avoids the risk of stones remaining in the tube and realizes efficient collection and storage of stones, greatly improving the convenience and safety of stone removal surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a bile duct lithotripsy proposed by the present invention; Figure 2 It is a schematic diagram of the overall side sectional structure of the present invention; Figure 3 It is a schematic diagram of the structure of the pickup component in the present invention; Figure 4 This is a schematic diagram of the storage component structure of the present invention; Figure 5 This is a schematic diagram of the front cross-sectional structure of the storage assembly of the present invention; Figure 6 It is a schematic diagram of the side cross-sectional structure of the storage assembly in the present invention; Figure 7 for Figure 2 A schematic diagram of the structure at center A; Figure 8 for Figure 6 Enlarged schematic diagram of the structure at point B in the middle.

[0018] In the figure: 1. First external tube; 2. Second external tube; 3. Clamp; 4. Storage shell; 5. First block; 6. Second block; 7. First pull rod; 8. First spring; 9. Second spring; 10. Second pull rod; 11. Third pull rod; 12. Fourth pull rod; 13. Rotating shell; 14. Threaded leaf; 15. Rubber pad; 16. Third spring; 17. Fixed block; 18. Rope; 19. Limiting plate; 20. First limiting groove; 21. Rotating slide groove; 22. Second limiting groove; 23. Fourth spring; 24. Slider; 25. Cylindrical groove. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1 like Figures 1-8As shown, a bile duct stone remover proposed by the present invention includes a first external tube 1 and a second external tube 2, the outer side of the second external tube 2 is fixedly connected to a storage shell 4, and a picking assembly is commonly provided between the first external tube 1 and the second external tube 2, and the picking assembly includes a splint 3, a third pull rod 11 and a fourth pull rod 12, and a third spring 16 symmetrically and movably connected on the outer side of the second external tube 2, and a first pull rod 7 and a second pull rod 10 movably connected inside the first external tube 1. The first pull rod 7 pulls it away from the splint 3, drives the third pull rod 11 to move, and prompts the two splints 3 to open to both sides. The first pull rod 7 is released, and the splint 3 is retracted inwardly to clamp the stones under the action of the third spring 16. Then the second pull rod 10 is pulled away from the splint 3, and the fourth pull rod 12 is driven to move, so that the splint 3 is moved upward. The stones are moved into the second external tube 2, and finally the first pull rod 7 is pulled to open the splint 3 and the stones fall out. A storage assembly is provided inside the second external tube 2, and the storage assembly includes a threaded leaf 14 and a rotating shell 13, a slider 24 that are rotatably connected inside the second external tube 2, and a rotating slide 21 opened on the inner side of the rotating shell 13 and a first spring 8 that is movably connected inside the first external tube 1. After the splint 3 is loosened to allow the stones to fall into it, the fourth pull rod 12 first drives the slider 24 to slide in the horizontal groove of the rotating slide 21, and then the first spring 8 rebounds and pushes the fourth pull rod 12 back to its position. During the returning process, the fourth pull rod 12 drives the slider 24 to slide in the arc groove of the rotating slide 21, prompting the rotating shell 13 to rotate. The rotating rotating shell 13 drives the threaded leaf 14 to rotate, and then the stones are collected in the storage shell 4.

[0021] The first external tube 1 and the second external tube 2 are threadedly connected, the second pull rod 10 and the fourth pull rod 12 are threadedly connected, the first pull rod 7 and the third pull rod 11 are threadedly connected, and the first external tube 1 and the second external tube 2 rotate with each other and are combined together.

[0022] The end of the second pull rod 10 away from the splint 3 is fixedly connected to the first block 5, and the end of the first pull rod 7 away from the splint 3 is fixedly connected to the second block 6. The first spring 8 is fixedly connected to the second pull rod 10. By pulling the second block 6, the second block 6 pulls the first pull rod 7.

[0023] A cylindrical groove 25 is formed inside the second pull rod 10 , and a second spring 9 is fixedly connected inside the cylindrical groove 25 . The second spring 9 is fixedly connected to the first pull rod 7 , and the second spring 9 returns the first pull rod 7 to its original position.

[0024] The inner sides of the second external tube 2, the first external tube 1, the fourth pull rod 12 and the second pull rod 10 are symmetrically provided with first limiting grooves 20, and the outer sides of the fourth pull rod 12, the second pull rod 10 and the first pull rod 7 and the third pull rod 11 are symmetrically fixedly connected with limiting plates 19. The two limiting plates 19 are slidably connected to the first limiting grooves 20. The first limiting grooves 20 limit the sliding position of the limiting plates 19, so that the second pull rod 10 and the fourth pull rod 12 slide within a certain range.

[0025] The first pull rod 7 is slidably connected to the second pull rod 10, the third pull rod 11 is movably connected to the fourth pull rod 12, and the end of the fourth pull rod 12 away from the second block 6 is movably connected to the splint 3. The second pull rod 10 pulls in the direction away from the splint 3 to drive the fourth pull rod 12 to follow the movement.

[0026] The fourth pull rod 12 is symmetrically fixedly connected to a fixed block 17 at one end close to the splint 3, and the outer sides of the two fixed blocks 17 are movably connected to ropes 18. The ropes 18 are fixedly connected to the third pull rod 11. The first pull rod 7 pulls in the direction away from the splint 3 to drive the third pull rod 11 to follow the movement.

[0027] One end of the rope 18 away from the third pull rod 11 is fixedly connected to the clamping plate 3 , and the third spring 16 is fixedly connected to the clamping plate 3 . The pulling of the rope 18 causes the two clamping plates 3 to open outwards.

[0028] In this embodiment, the location of the stone is found by a cholecystoscopic or other device, and the first external tube 1 and the second external tube 2 are rotated with each other, and the two are combined together. At this time, the hand holds the handle on the first external tube 1, and at this time, by pulling the second block 6, the second block 6 pulls the first pull rod 7, the first pull rod 7 squeezes the second spring 9, and the first pull rod 7 is pulled in the direction away from the splint 3 to drive the third pull rod 11 to follow the movement, and the third pull rod 11 pulls the rope 18, and the pulling of the rope 18 causes the two splints 3 to open outward, and by loosening and pulling the second block 6, the squeezed second spring 9 rebounds the first pull rod 7, so that the first pull rod 7 drives the third pull rod 11 to follow the movement. The rod 11 returns to its original position, and the splint 3, which is not pulled by the rope 18, is retracted inward by the third spring 16 to clamp the stone. At this time, by pulling the first pull block 5, the first pull block 5 pulls the second pull rod 10, so that the second pull rod 10 is pulled away from the splint 3 and drives the fourth pull rod 12 to follow the movement. The movable fourth pull rod 12 drives the stone clamped on the splint 3 to move to the inside of the second external tube 2. The second pull block 6 is pulled again, and the second pull block 6 drives the first pull rod 7 through the third pull rod 11 to make the splint 3 open outward to release the clamped stone, so that the stone falls into the second external tube 2, thereby retracting the stone into the second external tube 2.

[0029] Example 2 like Figures 1-8As shown, based on the first embodiment, a rubber pad 15 is fixedly connected to the inside of the second external tube 2, the rubber pad 15 is movably connected to the fourth pull rod 12, the fourth pull rod 12 is movably connected to the rotating shell 13, the rotating shell 13 is fixedly connected to the threaded leaf 14, and the fourth pull rod 12 drives the slider 24 to slide in the horizontal groove on the rotating slide 21.

[0030] A second limiting groove 22 is opened inside the fourth pull rod 12, and a fourth spring 23 is fixedly connected inside the second limiting groove 22. The fourth spring 23 is fixedly connected to the second limiting groove 22, and the slider 24 is slidably connected to the second limiting groove 22. The slider 24 is slidably connected to the rotating slide 21. The fourth pull rod 12 drives the slider 24 to slide in the arc groove on the rotating slide 21 to rotate the rotating shell 13.

[0031] The movement of the slider 24 drives the threaded leaves 14 to rotate by sliding on the rotating slot 21, so that the stone is gradually collected in the storage shell 4.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A bile duct stone removal device, comprising a first external tube (1) and a second external tube (2), characterized in that: The outer side of the second external tube (2) is fixedly connected to a storage shell (4), and a picking assembly is commonly provided between the first external tube (1) and the second external tube (2), and the picking assembly includes a splint (3), a third pull rod (11), a fourth pull rod (12), and a third spring (16) symmetrically connected on the outer side of the second external tube (2), and a first pull rod (7) and a second pull rod (10) connected inside the first external tube (1). The first pull rod (7) pulls it away from the splint (3), drives the third pull rod (11) to move, and prompts the two splints (3) to open to both sides. The first pull rod (7) is released, and the splint (3) is retracted inwardly to clamp the stone under the action of the third spring (16). Then the second pull rod (10) is pulled away from the splint (3), and the fourth pull rod (12) is driven to move, so that the stone on the splint (3) moves into the second external tube (2), and finally Pull the first pull rod (7) to open the splint (3) and let the stone fall. A storage assembly is provided inside the second external tube (2), and the storage assembly includes a threaded leaf (14) and a rotating shell (13), a slider (24) that are rotatably connected inside the second external tube (2), and a rotating slide (21) opened on the inner side of the rotating shell (13) and a first spring (8) that is movably connected inside the first external tube (1). After the splint (3) is loosened to let the stone fall therein, the fourth pull rod (12) first drives the slider (24) to slide in the transverse groove of the rotating slide (21), and then the first spring (8) rebounds and pushes the fourth pull rod (12) back to its original position. During the returning process, the fourth pull rod (12) drives the slider (24) to slide in the arc groove of the rotating slide (21), prompting the rotating shell (13) to rotate. The rotating rotating shell (13) drives the threaded leaf (14) to rotate, and then the stone is collected in the storage shell (4).

2. The bile duct stone removal device according to claim 1, characterized in that: The first external tube (1) and the second external tube (2) are threadedly connected, the second pull rod (10) and the fourth pull rod (12) are threadedly connected, and the first pull rod (7) and the third pull rod (11) are threadedly connected.

3. The bile duct stone removal device according to claim 1, characterized in that: The end of the second pull rod (10) away from the splint (3) is fixedly connected to the first pull block (5), the end of the first pull rod (7) away from the splint (3) is fixedly connected to the second pull block (6), and the first spring (8) is fixedly connected to the second pull rod (10).

4. The bile duct stone removal device according to claim 1, characterized in that: A cylindrical groove (25) is provided inside the second pull rod (10), a second spring (9) is fixedly connected inside the cylindrical groove (25), and the second spring (9) is fixedly connected to the first pull rod (7).

5. The bile duct stone removal device according to claim 1, characterized in that: The second external tube (2), the first external tube (1), the fourth pull rod (12), and the second pull rod (10) are all symmetrically provided with first limiting grooves (20) on their inner sides, and the fourth pull rod (12), the second pull rod (10), the first pull rod (7), and the third pull rod (11) are all symmetrically fixedly connected to limiting plates (19) on their outer sides, and the two limiting plates (19) are both slidably connected to the first limiting grooves (20).

6. The bile duct stone removal device according to claim 1, characterized in that: The first pull rod (7) is slidably connected to the second pull rod (10), the third pull rod (11) is movably connected to the fourth pull rod (12), and the end of the fourth pull rod (12) away from the second block (6) is movably connected to the splint (3).

7. The bile duct stone removal device according to claim 1, characterized in that: One end of the fourth pull rod (12) close to the splint (3) is symmetrically fixedly connected to a fixed block (17), and the outer sides of the two fixed blocks (17) are movably connected to ropes (18), and the ropes (18) are fixedly connected to the third pull rod (11).

8. The bile duct stone removal device according to claim 7, characterized in that: One end of the rope (18) away from the third pull rod (11) is fixedly connected to the clamping plate (3), and the third spring (16) is fixedly connected to the clamping plate (3).

9. The bile duct stone removal device according to claim 1, characterized in that: A rubber pad (15) is fixedly connected to the interior of the second external tube (2); the rubber pad (15) is movably connected to the fourth pull rod (12); the fourth pull rod (12) is movably connected to the rotating shell (13); and the rotating shell (13) is fixedly connected to the threaded leaf (14).

10. The bile duct stone removal device according to claim 1, characterized in that: A second limiting groove (22) is provided inside the fourth pull rod (12), a fourth spring (23) is fixedly connected inside the second limiting groove (22), the fourth spring (23) is fixedly connected to the second limiting groove (22), the slider (24) is slidably connected to the second limiting groove (22), and the slider (24) is slidably connected to the rotating slide groove (21).

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