A lithotripter for residual bile duct stones after ERCP

Abstract

The present invention relates to the technical field of medical devices, and in particular to a lithotripter for residual bile duct stones after ERCP surgery, comprising a mounting mechanism, a lithotripter mechanism and a clamping mechanism; the mounting mechanism comprises an outer tube, a rotary handle and a transparent tube; the clamping mechanism comprises a pressure rod, a torsion spring, a holding rod and a fixing assembly; the pressure rod has a slide groove, and after the lithotripter mechanism is pushed out of the transparent tube by the rotary handle, the holding rod is pressed toward the rotary handle by the pressure rod, so that the holding rod presses the rotary handle downward; when the holding rod clamps the rotary handle in the outer tube, the fixing assembly pops out from the outer tube to fix the holding rod on the outer tube, and at this time, the force applied to the pressure rod can be canceled, and the bile duct stone removal surgery is performed by the lithotripter, thereby solving the problem that the rotary handle rotates on the outer tube due to the torque generated during the process of removing bile duct stones.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a lithotripter for residual bile duct stones after ERCP surgery. Background Art

[0002] Biliary stones are a common surgical condition. Stones in the common bile duct can cause biliary obstruction, leading to jaundice, cholangitis, and even pancreatitis, which can be life-threatening. In clinical practice, after ERCP stone removal, patients need to use a lithotripter to remove any remaining bile duct stones.

[0003] At present, the existing technology (CN113662625A) discloses a stone remover for residual bile duct stones after ERCP surgery, which specifically relates to the technical field of medical devices. A stone remover for residual bile duct stones after ERCP surgery, comprising an outer tube and a rotary handle threadedly connected to one end of the outer tube, the rotary handle being provided with a transmission wire slidably connected to the outer tube, the transmission wire being further coated with a transparent tube detachably connected to the outer tube, the free end of the transmission wire being further connected to a steel wire and a sealing head located at the free end of the steel wire, the steel wire being coated with a sponge, a plurality of arc-shaped guide wires being equidistantly distributed circumferentially at both ends of the steel wire, the sealing head being engaged with the transparent tube; the outer tube being further provided with a Luer connector. The technical solution of the present invention solves the problem that the existing ERCP stone removal cannot completely remove the patient's bile duct stones, and can be used for the removal of bile duct stones.

[0004] When using the above method, when removing bile duct stones, it is necessary to rotate the outer tube to drive the sponge to rotate, so that the sponge can fully absorb the bile duct stones in the body. However, the friction between the sponge and the human body will generate torque on the rotating handle, causing the rotating handle to rotate on the outer tube due to the torque, and then the rotating handle drives the sponge into the transparent tube through the transmission wire, thereby affecting the effect of removing bile duct stones. Summary of the Invention

[0005] The purpose of the present invention is to provide a lithotripter for residual bile duct stones after ERCP surgery, aiming to solve the problem that the handle rotates on the outer tube due to the torque generated during the removal of bile duct stones.

[0006] To achieve the above-mentioned object, the present invention provides a lithotripter for residual bile duct stones after ERCP surgery, comprising a mounting mechanism, a lithotripter mechanism, and a clamping mechanism;

[0007] The mounting mechanism includes an outer tube, a rotating handle and a transparent tube. The rotating handle is threadedly connected to the outer tube and is located on the inner side wall of the outer tube. The transparent tube is fixedly connected to the outer tube and is located on the inner side wall of the outer tube. The stone removal mechanism is arranged on a side of the rotating handle close to the transparent tube.

[0008] The clamping mechanism includes a pressure rod, a torsion spring, a supporting rod and a fixing assembly, the pressure rod has a sliding groove, the pressure rod is rotatably connected to the outer tube and is located on the outer side wall of the outer tube, one side of the torsion spring is fixedly connected to the pressure rod, and the other side of the torsion spring is fixedly connected to the outer tube and is located between the pressure rod and the outer tube, the supporting rod is slidably connected to the pressure rod and the outer tube and is located in the sliding groove, and the fixing assembly is arranged on the side of the inner side wall of the outer tube close to the supporting rod.

[0009] Among them, the supporting rod includes a sliding rod and a slider, the sliding rod is slidably connected to the outer tube and passes through the outer tube, the sliding rod has a fixing groove, and the fixing groove is located on the side close to the fixed component. One side of the slider is rotatably connected to the sliding rod, and the other side of the sliding rod is slidably connected to the pressure rod and is located in the sliding groove.

[0010] In which, the fixing assembly includes a return spring and a supporting block, the outer tube has a guide groove, the return spring is fixedly connected to the outer tube and is located in the guide groove, the supporting block is slidingly connected to the return spring and the outer tube and is located in the guide groove, and the supporting block fits into the fixed groove.

[0011] Wherein, the fixing assembly further includes a shifting block, which is fixedly connected to the supporting block and passes through the outer tube.

[0012] Wherein, the stone removal mechanism includes a transmission wire and an absorber, the transmission wire is fixedly connected to the rotating handle and is located in the transparent tube, and the absorber is arranged on the side of the transmission wire away from the rotating handle.

[0013] Among them, the adsorber includes a steel wire, an adsorption sponge and a guide wire. The steel wire is fixedly connected to the transmission wire and is located on the side away from the rotating handle. The adsorption sponge is detachably connected to the steel wire and is located on the outer side wall of the steel wire. The guide wire is detachably connected to the steel wire and is located around the adsorption sponge.

[0014] The present invention provides a lithotripter for residual bile duct stones after ERCP surgery. After the stone removal mechanism is pushed out of the transparent tube by the rotating handle, the holding rod is pressed toward the rotating handle by the pressure rod, so that the holding rod presses the rotating handle downward. When the holding rod clamps the rotating handle in the outer tube, the fixing assembly pops out from the outer tube to fix the holding rod on the outer tube. At this time, the force applied to the pressure rod can be canceled, and the bile duct stone removal surgery is performed using the lithotripter, which solves the problem that the rotating handle may rotate on the outer tube due to the torque generated during the process of removing bile duct stones. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic structural diagram of a lithotripsy for residual bile duct stones after ERCP provided by the present invention.

[0017] Figure 2 This is a top view of a lithotripter for residual bile duct stones after ERCP surgery provided by the present invention.

[0018] Figure 3 yes Figure 2 Section view along plane AA.

[0019] Figure 4 yes Figure 3 Enlarged view of detail B.

[0020] 1-installation mechanism, 2-stone removal mechanism, 3-clamping mechanism, 4-outer tube, 5-rotating handle, 6-transparent tube, 7-pressure rod, 8-torsion spring, 9-holding rod, 10-fixing component, 11-slide groove, 12-slide rod, 13-sliding block, 14-fixing groove, 15-reset spring, 16-holding block, 17-guide groove, 18-shift block, 19-transmission wire, 20-absorber, 21-steel wire, 22-absorption sponge, 23-guide wire, 24-rotating handle body, 25-friction pad, 26-rotating shaft, 27-ball, 28-matching plate, 29-anti-slip pad. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0023] See also Figures 1 to 4 The present invention provides a lithotripter for residual bile duct stones after ERCP surgery, comprising a mounting mechanism 1, a lithotripter mechanism 2, and a clamping mechanism 3;

[0024] The mounting mechanism 1 includes an outer tube 4, a rotary handle 5, and a transparent tube 6. The rotary handle 5 is threadedly connected to the outer tube 4 and is located on the inner side wall of the outer tube 4. The transparent tube 6 is fixedly connected to the outer tube 4 and is located on the inner side wall of the outer tube 4. The stone removal mechanism 2 is provided on a side of the rotary handle 5 close to the transparent tube 6.

[0025] The clamping mechanism 3 includes a pressure rod 7, a torsion spring 8, a supporting rod 9 and a fixing assembly 10. The pressure rod 7 has a slide groove 11. The pressure rod 7 is rotatably connected to the outer tube 4 and is located on the outer side wall of the outer tube 4. One side of the torsion spring 8 is fixedly connected to the pressure rod 7, and the other side of the torsion spring 8 is fixedly connected to the outer tube 4 and is located between the pressure rod 7 and the outer tube 4. The supporting rod 9 is slidably connected to the pressure rod 7 and the outer tube 4 and is located in the slide groove 11. The fixing assembly 10 is arranged on the side of the inner side wall of the outer tube 4 close to the supporting rod 9.

[0026] In this embodiment, the mounting mechanism 1 provides mounting conditions for the stone-removing mechanism 2 and the clamping mechanism 3. When the stone-removing mechanism 2 needs to be used, the rotary handle 5 is first rotated to make the rotary handle 5 rotate in the outer tube 4 and move toward the transparent tube 6 until the rotary handle 5 pushes the stone-removing mechanism 2 out of the transparent tube 6. Then, the pressure rod 7 is used to press the supporting rod 9 toward the direction close to the rotary handle 5 so that the supporting rod 9 presses the rotary handle 5 downward. When the supporting rod 9 clamps the rotary handle 5 in the outer tube 4, the fixing The fixed component 10 pops out from the outer tube 4 to fix the holding rod 9 on the outer tube 4. At this time, the force applied to the pressure rod 7 can be cancelled, and the bile duct stone removal operation is performed through the lithotripter. After the operation, the fixing component 10 is toggled to separate the fixing component 10 from the holding rod 9. At this time, the torsion spring 8 between the pressure rod 7 and the outer tube 4 is reset, pushing the pressure rod 7 to drive the holding rod 9 to slide out of the outer tube 4 and separate from the rotary handle 5, solving the problem that the rotary handle 5 will rotate on the outer tube 4 due to the torque generated during the removal of bile duct stones.

[0027] Furthermore, the supporting rod 9 includes a sliding rod 12 and a slider 13, the sliding rod 12 is slidably connected to the outer tube 4 and passes through the outer tube 4, the sliding rod 12 has a fixing groove 14, and the fixing groove 14 is located on one side close to the fixing component 10, one side of the slider 13 is rotatably connected to the sliding rod 12, and the other side of the sliding rod 12 is slidably connected to the pressure rod 7 and is located in the sliding groove 11; the fixing component 10 includes a return spring 15 and a supporting block 16, the outer tube 4 has a guide groove 17, the return spring 15 is fixedly connected to the outer tube 4 and is located in the guide groove 17, the supporting block 16 is slidably connected to the return spring 15, and is slidably connected to the outer tube 4 and is located in the guide groove 17, and the supporting block 16 fits into the fixing groove 14; the fixing component 10 also includes a shift block 18, the shift block 18 is fixedly connected to the supporting block 16 and passes through the outer tube 4.

[0028] When the lever 7 is pressed down, the sliding bar 12 and the lever 7 slide in the sliding groove 11 on the lever 7 through the slider 13, and the angle difference between the lever 7 and the sliding bar 12 is caused by the slider 12 rotating on the slider 13. When the slider 12 tightens the handle 5 to the bottom of the outer tube 4, the fixing groove 14 on the sliding bar 12 coincides with the guide groove 17 on the outer tube 4. At this time, the return spring 15 in the guide groove 17 pushes the retaining block 16 to slide from the guide groove 17 into the fixing groove 14, thereby clamping the slide bar 12 on the outer tube 4. After the operation is completed, the retaining block 16 can be driven by the shifting block 18 to slide out of the sliding groove 11 in the fixing groove 14, so that the torsion spring 8 drives the slide bar 12 to slide out of the outer tube 4 through the lever 7.

[0029] Furthermore, the stone removal mechanism 2 includes a transmission wire 19 and an absorbent 20, the transmission wire 19 is fixedly connected to the rotary handle 5 and is located in the transparent tube 6, and the absorbent 20 is arranged on the side of the transmission wire 19 away from the rotary handle 5; the absorbent 20 includes a steel wire 21, an absorption sponge 22 and a guide wire 23, the steel wire 21 is fixedly connected to the transmission wire 19 and is located on the side away from the rotary handle 5, the absorption sponge 22 is detachably connected to the steel wire 21 and is located on the outer wall of the steel wire 21, and the guide wire 23 is detachably connected to the steel wire 21 and is located around the absorption sponge 22.

[0030] In this embodiment, the absorbent 20 on the transmission wire 19 is pushed out of the transparent tube 6 by the rotary handle 5, and the adsorption sponge 22 on the steel wire 21 of the absorbent 20 is expanded. The adsorption sponge 22 is used to absorb and remove flocculent and muddy stones. The expansion degree of the adsorption sponge 22 is restricted by the guide wire 23 to protect the patient's bile duct.

[0031] Furthermore, the fixing assembly 10 also includes a rotating shaft 26 and a ball 27. The rotating shaft 26 is fixed to the supporting rod 9 and is located on the inner side wall of the supporting rod 9. The ball 27 is rotatably connected to the rotating shaft 26 and is located on the outer side wall of the rotating shaft 26; the supporting rod 9 also includes a fitting plate 28 and an anti-slip pad 29. The fitting plate 28 is fixedly connected to the sliding rod 12 and is located on the side away from the slider 13. The anti-slip pad 29 is fixedly connected to the fitting plate 28 and is located on the side away from the sliding rod 12; the handle 5 includes a handle body 24 and a friction pad 25. The handle body 24 is threadedly connected to the outer tube 4 and is located on the inner side wall of the outer tube 4. The friction pad 25 is fixedly connected to the handle body 24 and is located on the outer side wall of the handle body 24.

[0032] In this embodiment, the friction pad 25 can increase the friction between the handle body 24 and the hand, thereby increasing the force effect on the handle body 24, and the engaging plate 28 on the slide bar 12 engages with the outer surface of the handle body 24, thereby increasing the contact area between the slide bar 12 and the handle body 24, and the anti-slip pad 29 on the engaging plate 28 can increase the friction between the engaging plate 28 and the handle body 24, thereby increasing the clamping effect of the handle body 24. After the fixing groove 14 of the slide bar 12 is staggered with the guide groove 17, the rebound force of the return spring 15 pushes the ball 27 on the abutting rod 9 to contact the outer side wall of the slide bar 12. When the slide bar 12 slides on the outer tube 4, the ball 27 rotates on the abutting rod 9 following the moving direction of the slide bar 12 through the rotating shaft 26, thereby reducing the friction between the slide bar 12 and the anti-slip pad 29.

[0033] The above disclosure is only a preferred embodiment of the lithotripsy for residual bile duct stones after ERCP surgery of the present invention. Of course, this cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that implementing all or part of the processes of the above embodiment and making equivalent changes in accordance with the claims of the present invention still fall within the scope of the invention.

Claims

1. A lithotripter for residual bile duct stones after ERCP, characterized in that: It includes an installation mechanism, a stone removal mechanism and a clamping mechanism; The mounting mechanism includes an outer tube, a rotating handle and a transparent tube. The rotating handle is threadedly connected to the outer tube and is located on the inner side wall of the outer tube. The transparent tube is fixedly connected to the outer tube and is located on the inner side wall of the outer tube. The stone removal mechanism is arranged on a side of the rotating handle close to the transparent tube. The clamping mechanism includes a pressure rod, a torsion spring, a holding rod and a fixing assembly, the pressure rod having a slide groove, the pressure rod being rotatably connected to the outer tube and being located on the outer side wall of the outer tube, one side of the torsion spring being fixedly connected to the pressure rod, the other side of the torsion spring being fixedly connected to the outer tube and being located between the pressure rod and the outer tube, the holding rod being slidably connected to the pressure rod and the outer tube and being located in the slide groove, and the fixing assembly being arranged on a side of the inner side wall of the outer tube close to the holding rod; The stone removal mechanism includes a transmission wire and an absorber, wherein the transmission wire is fixedly connected to the rotating handle and is located in the transparent tube, and the absorber is arranged on a side of the transmission wire away from the rotating handle; The adsorber includes a steel wire, an adsorption sponge and a guide wire. The steel wire is fixedly connected to the transmission wire and is located on a side away from the rotary handle. The adsorption sponge is detachably connected to the steel wire and is located on the outer side wall of the steel wire. The guide wire is detachably connected to the steel wire and is located around the adsorption sponge. The holding rod includes a sliding rod and a slider. The sliding rod is slidably connected to the outer tube and passes through the outer tube. The sliding rod has a fixing groove, which is located on a side close to the fixing component. One side of the slider is rotatably connected to the sliding rod, and the other side of the sliding rod is slidably connected to the pressure rod and is located in the sliding groove. The fixing assembly includes a return spring and a supporting block. The outer tube has a guide groove. The return spring is fixedly connected to the outer tube and is located in the guide groove. The supporting block is slidably connected to the return spring and the outer tube and is located in the guide groove, and the supporting block fits into the fixed groove.

2. The lithotripter for residual bile duct stones after ERCP as claimed in claim 1, characterized in that: The fixing assembly further comprises a shifting block, which is fixedly connected to the abutting block and passes through the outer tube.

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