An instrument and method for lithotripsy of gastric stones

Abstract

This invention relates to a gastric stone fragmentation instrument, comprising: a steel wire forming a loop to encircle the gastric stone; a pushing component driving the steel wire to extend and guide it to the location of the gastric stone; an elastic pressure component providing elastic contraction force after the steel wire encircles the gastric stone, causing the steel wire to tightly bind the gastric stone; and a reciprocating drive component driven by the steel wire to reciprocate while the steel wire is tightly bound to the gastric stone, thereby cutting the gastric stone. Furthermore, this invention also relates to a corresponding gastric stone fragmentation method. This invention improves fragmentation efficiency and enhances operational stability, avoiding the time wasted on repeated operations and adjustments, thus effectively shortening the overall operation time, reducing patient discomfort during surgery and the risk of complications that may arise from prolonged operation. Simultaneously, stable operation reduces accidental damage to the gastric mucosa that may be caused by repeated pulling, improving the safety of the surgery.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a lithotripsy device and method for gastric stones. Background Technology

[0002] Gastric stones are a common digestive tract condition in clinical practice. For larger gastric stones, endoscopic lithotripsy is currently the most common treatment method. The core idea is to break the stone into smaller pieces using endoscopic guidance instruments, then soften it with medication, and finally expel it from the body through the digestive tract.

[0003] The mainstream approach in current endoscopic lithotripsy procedures involves using a wire loop to encircle the gastric stone under endoscopic guidance. External force is then applied to pull the wire, relying on the tension to cut or tear the stone into smaller pieces. However, gastric stones are often hard and smooth, posing significant limitations to current lithotripsy techniques. Firstly, the high hardness of the stone makes it difficult to quickly cut it by simply pulling the wire, resulting in a prolonged lithotripsy process. Secondly, the smooth surface makes the wire loop prone to slipping off the stone, requiring the surgeon to repeatedly adjust its position and pull it multiple times. This not only increases the difficulty and efficiency of the procedure but may also increase patient discomfort and surgical risks due to the prolonged operation time. Therefore, current techniques for gastric stone lithotripsy struggle to cut the stone by forcefully pulling the wire, impacting surgical efficiency.

[0004] Therefore, given the hard and smooth nature of gastric stones, optimizing endoscopic lithotripsy instruments and procedures to prevent wire loop slippage, shorten lithotripsy time, and improve lithotripsy stability and efficiency has become a pressing technical problem in clinical practice. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention addresses the issue of hard, smooth gastric stones. Under endoscopic guidance, a wire is looped around the gastric stone, and a certain force is applied to its surface. The wire moves back and forth against the stone, acting like a micro-toothed saw to cut it. This avoids the problem of the stone slipping out of the wire loop during conventional wire pulling, shortening the fragmentation time, providing stability for the surgeon, and improving fragmentation efficiency. Therefore, this invention solves the problem of difficult gastric stone fragmentation and improves surgical efficiency.

[0006] To solve the above-mentioned technical problems or achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] According to one aspect of the present invention, a gastric stone lithotripsy device is provided, comprising:

[0008] A steel wire, formed into a loop to secure a stomach stone;

[0009] The pusher component drives the steel wire to extend and guide it to the location of the gastric stone.

[0010] The elastic pressure assembly provides an elastic contraction force after the steel wire is looped around the gastric stone, so that the steel wire tightly binds the gastric stone;

[0011] A reciprocating drive assembly is connected to a steel wire to drive the steel wire to reciprocate while tightly bound to a gastric stone in order to cut the gastric stone.

[0012] In one embodiment of the present invention, the push component includes:

[0013] A wire conduit, with a retractable wire inside;

[0014] Support sleeve, which is installed at the end of the wire conduit where the wire extends out;

[0015] The fixing tube is connected to the other end of the wire conduit.

[0016] Headgear, the headgear is connected to the fixing tube;

[0017] The pusher, which drives the steel wire to extend through the head sleeve, fixation tube, steel wire conduit and support sleeve to guide the steel wire to the location of the gastric stone.

[0018] In one embodiment of the invention, the headgear engages with the endoscope's slot.

[0019] In one embodiment of the present invention, the elastic pressure application component includes:

[0020] The first spring is mounted on the push handle. The first spring is compressed as the push handle is pushed and provides an elastic contraction force to tighten the steel wire as the push handle is released.

[0021] A wire-fixed component is connected to a wire and is linked to a push handle.

[0022] The second spring is mounted on the wire fixing component. The second spring is compressed as the wire fixing component is pushed and provides an elastic contraction force to tighten the wire as the wire fixing component retracts.

[0023] In one embodiment of the present invention, the reciprocating drive component includes:

[0024] A reciprocating motion structure, which is connected to a steel wire;

[0025] The motor is connected to the reciprocating motion structure. The motor drives the reciprocating motion structure to make the steel wire move back and forth while tightly binding the gastric stone to cut the gastric stone.

[0026] The motor fixing guide box is movable and encloses the motor, reciprocating motion structure, steel wire fixing component and second spring, and the motor fixing guide box is linked to the push handle.

[0027] In one embodiment of the present invention, the reciprocating motion structure includes a gear and a gear meshing frame, wherein the gear meshing frame meshes with the gear and is connected to a steel wire. The motor drives the gear to rotate, thereby driving the gear meshing frame to reciprocate and drive the steel wire to reciprocate.

[0028] In one embodiment of the present invention, the reciprocating motion structure includes a rotary cam and a hydraulic cylinder, wherein the rotary cam is connected to the hydraulic cylinder, the hydraulic cylinder is connected to the steel wire, and the motor drives the rotary cam to rotate, thereby pushing the hydraulic cylinder to perform reciprocating motion to drive the steel wire to perform reciprocating motion.

[0029] In one embodiment of the present invention, the reciprocating motion structure includes a rocking gear, wherein the rocking gear is connected to the motor shaft of the motor and is connected to a steel wire, and the motor shaft drives the rocking gear to rock to drive the steel wire to perform reciprocating motion.

[0030] In one embodiment of the present invention, the gastric stone lithotripsy device further includes:

[0031] The housing assembly is connected between the head cover and the push handle. The housing assembly includes a detachable and mating upper housing and a lower housing. The housing assembly encloses a motor fixing guide box and is equipped with a motor on / off switch for controlling the start and stop of the motor.

[0032] In one embodiment of the present invention, a guide rail is formed within the housing assembly, the motor fixing guide box moves on the guide rail, the wire fixing member moves with the overall movement of the motor fixing guide box, and the wire fixing member reciprocates along the guide rail when the wire reciprocates.

[0033] According to another aspect of the present invention, a method for fragmenting gastric stones is provided, employing the gastric stone fragmentation instrument as described above, comprising the following steps:

[0034] The pusher component extends and guides the steel wire to the location of the gastric stone, causing the wire to form a loop to encircle the gastric stone.

[0035] Release the push component, and the elastic contraction force provided by the elastic pressure component will cause the steel wire to be tightly bound to the surface of the gastric stone;

[0036] The reciprocating drive assembly is activated, which drives the steel wire tightly bound to the gastric stone to reciprocate. At the same time, the elastic pressure assembly provides elastic contraction force to keep the steel wire tightly bound to the gastric stone, so as to saw the gastric stone apart.

[0037] After the gastric stones are cut into fragments, the reciprocating drive component is stopped, and the push component is operated to retract the steel wire.

[0038] In one embodiment of the present invention, the method for breaking up gastric stones further includes the following steps:

[0039] Remove the head cover of the pusher component from the endoscope slot, hold the housing assembly, and pull out the wire cannula, support sleeve, and wire to complete the lithotripsy operation.

[0040] The technical solution provided by this invention has the following advantages compared with the prior art:

[0041] This invention utilizes a reciprocating drive component to drive a steel wire in a reciprocating frictional motion while tightly binding a gastric stone, similar to the cutting action of a micro-toothed saw. Compared to the existing method of simply pulling the steel wire, this method can cut through hard and smooth gastric stones more quickly, avoiding repeated pulling operations due to the stone slipping out of the loop or its high hardness, thus significantly improving stone fragmentation efficiency. Simultaneously, the elastic compression force provided by the elastic pressure component ensures that the steel wire remains tightly bound to the surface of the gastric stone, effectively avoiding the problem of the stone easily slipping out of the loop when pulling the wire in existing technologies. This provides stable stone fragmentation conditions for doctors and reduces the number of adjustments required during the procedure.

[0042] This invention improves lithotripsy efficiency and enhances operational stability, avoiding the time wasted on repeated operations and adjustments, thereby effectively shortening the overall operation time, reducing patient discomfort during the operation and the risk of complications that may be caused by prolonged operation. At the same time, stable operation reduces the accidental damage to the gastric mucosa that may be caused by repeated pulling, thus improving the safety of the operation. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 A three-dimensional structural schematic diagram of a gastric stone lithotripsy device provided in one embodiment of the present invention is shown;

[0046] Figure 2 A top view of a gastric stone lithotripsy device provided in one embodiment of the present invention is shown;

[0047] Figure 3 A side view of a gastric stone lithotripsy device provided in one embodiment of the present invention is shown;

[0048] Figure 4 This diagram illustrates the internal structure of a gastric stone lithotripsy device provided in one embodiment of the present invention.

[0049] Figure 5 This diagram shows a partial structural schematic of a gastric stone lithotripsy device in a lithotripsy state according to an embodiment of the present invention;

[0050] Figure 6 This diagram shows a partial cross-sectional view of a gastric stone lithotripsy device in its retracted state, according to one embodiment of the present invention.

[0051] Figure 7 This diagram illustrates a reciprocating motion structure in a gastric stone lithotripsy device according to an embodiment of the present invention.

[0052] Figure 8 This diagram illustrates a reciprocating motion structure in a gastric stone lithotripsy device according to another embodiment of the present invention;

[0053] Figure 9 A schematic flowchart of a method for breaking up gastric stones according to one embodiment of the present invention is shown.

[0054] The components are as follows: 1. Push handle; 2. First spring; 3. Upper housing; 4. Lower housing; 5. Head cover; 6. Fixing tube; 7. Steel wire conduit; 8. Support sleeve; 9. Steel wire; 10. Motor on / off switch; 11. Motor; 12. Gear; 13. Gear meshing frame; 14. Steel wire fixing component; 15. Second spring; 16. Motor fixing guide box; 17. Housing assembly; 18. Gastric stone; 19. Rocking gear; 20. Guide rail. Detailed Implementation

[0055] To better understand the above-mentioned objectives, features, and advantages of the present invention, embodiments of the present invention will be further described below. It should be noted that, unless otherwise specified, embodiments of the present invention and features thereof can be combined with each other.

[0056] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways than those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of the invention.

[0057] like Figure 1-6 As shown, one embodiment of the present invention provides a gastric stone lithotripsy device, comprising:

[0058] Steel wire 9, steel wire 9 forms a loop to loop around the gastric stone 18;

[0059] The push component drives the steel wire 9 to extend and guide the steel wire 9 to the location of the gastric stone;

[0060] The elastic pressure component provides an elastic contraction force after the steel wire 9 is looped around the gastric stone 18, so that the steel wire 9 tightly binds the gastric stone 18;

[0061] A reciprocating drive assembly is connected to a steel wire 9 to drive the steel wire 9 to reciprocate in a state of tightly binding the gastric stone 18 in order to cut the gastric stone 18.

[0062] This invention utilizes a reciprocating drive component to drive a steel wire in a reciprocating frictional motion while tightly binding a gastric stone, similar to the cutting action of a micro-toothed saw. Compared to the existing method of simply pulling the steel wire, this method can cut through hard, smooth gastric stones more quickly, avoiding repeated pulling operations due to the stone slipping out of the loop or its high hardness, thus significantly improving stone fragmentation efficiency. Simultaneously, the elastic contraction force provided by the elastic pressure component ensures that the steel wire remains tightly bound to the surface of the gastric stone, effectively avoiding the problem of the stone easily slipping out of the loop when pulling the wire in existing technologies. This provides stable conditions for the surgeon's operation, reducing the number of adjustments required during the procedure. The above-mentioned technical solution of this invention improves stone fragmentation efficiency and enhances operational stability, avoiding the time wasted on repeated operations and adjustments, thereby effectively shortening the overall operation time, reducing patient discomfort during surgery and the risk of complications that may arise from prolonged operation. At the same time, stable operation reduces the potential for accidental damage to the gastric mucosa caused by repeated pulling, improving the safety of the surgery.

[0063] In the above embodiments of the present invention, such as Figure 1-4 As shown, the push component includes:

[0064] A steel wire conduit 7, with a retractable steel wire 9 sleeved inside the steel wire conduit 7;

[0065] Support sleeve 8 is installed at the end of the wire guide 7 that extends out of the wire 9;

[0066] Fixing tube 6 is connected to the other end of the wire conduit 7;

[0067] Head cover 5, head cover 5 is connected to fixing tube 6;

[0068] Push handle 1 drives steel wire 9 to extend through head sleeve 5, fixing tube 6, steel wire conduit 7 and support sleeve 8 to introduce steel wire 9 to the location of gastric stone.

[0069] In the above embodiments of the present invention, such as Figure 1-4 As shown, the headgear 5 engages with the endoscope's slot (not shown).

[0070] In the above embodiments of the present invention, such as Figure 1-5 As shown, the elastic pressure application component includes:

[0071] The first spring 2 is disposed on the push handle 1. The first spring 2 is compressed as the push handle 1 is pushed and provides elastic contraction force to tighten the steel wire 9 as the push handle 1 is released.

[0072] The wire fixing component 14 is connected to the wire 9 and is linked to the push handle 1.

[0073] The second spring 15 is disposed on the wire fixing member 14. The second spring 15 is compressed as the wire fixing member 14 is pushed and provides elastic contraction force to tighten the wire 9 as the wire fixing member 14 retracts.

[0074] In the above embodiments of the present invention, such as Figure 4 As shown, the reciprocating drive component includes:

[0075] A reciprocating motion structure is connected to steel wire 9;

[0076] Motor 11 is connected to the reciprocating motion structure for transmission. Motor 11 drives the reciprocating motion structure to make the steel wire 9 reciprocate in the state of tightly binding the gastric stone 18 to cut the gastric stone 18.

[0077] The motor fixing guide box 16 is movable and encloses the motor 11, the reciprocating motion structure, the steel wire fixing component 14 and the second spring 15, and the motor fixing guide box 16 is linked to the push handle 1.

[0078] In the above embodiments of the present invention, such as Figure 4 and 7 As shown, the reciprocating motion structure includes a gear 12 and a gear meshing frame 13, wherein the gear meshing frame 13 meshes with the gear 12 and is connected to the steel wire 9. The motor 11 drives the gear 12 to rotate, thereby driving the gear meshing frame 13 to reciprocate and drive the steel wire 9 to reciprocate.

[0079] In the above embodiments of the present invention, optionally, the reciprocating motion structure includes a rotary cam (not shown in the figure) and a hydraulic cylinder (not shown in the figure), wherein the rotary cam is connected to the hydraulic cylinder, the hydraulic cylinder is connected to the steel wire 9, and the motor 11 drives the rotary cam to rotate, thereby pushing the hydraulic cylinder to perform reciprocating motion to drive the steel wire 9 to perform reciprocating motion.

[0080] In the above embodiments of the present invention, alternatively, such as Figure 8 As shown, the reciprocating motion structure includes a rocking gear 19, which is connected to the motor shaft of the motor 11 and to the steel wire 9. The motor shaft drives the rocking gear 19 to rock, thereby driving the steel wire 9 to perform reciprocating motion.

[0081] In the above embodiments of the present invention, such as Figure 1-4As shown, the lithotripsy equipment for gastric stones also includes:

[0082] The housing assembly 17 is connected between the head cover 5 and the push handle 1. The housing assembly 17 includes a detachable and matched upper housing 3 and a lower housing 4. The housing assembly 17 encloses the motor fixing guide box 16, and the housing assembly 17 is provided with a motor on / off switch 10 for controlling the start and stop of the motor.

[0083] In the above embodiments of the present invention, a guide rail 20 is formed inside the housing assembly 17, the motor fixing guide box 16 moves on the guide rail 20, the wire fixing member 14 moves with the overall movement of the motor fixing guide box 16, and the wire fixing member 14 reciprocates along the guide rail 20 when the wire 9 reciprocates.

[0084] In addition, such as Figure 9 As shown, an embodiment of the present invention also provides a method for fragmenting gastric stones, using the gastric stone fragmentation instrument as described above, including the following steps:

[0085] S1: Push the pusher component to extend and guide the steel wire to the location of the gastric stone, so that the steel wire forms a loop to encircle the gastric stone;

[0086] S2: Release the push component, and the elastic contraction force provided by the elastic pressure component will make the steel wire tightly bound to the surface of the gastric stone;

[0087] S3: Activate the reciprocating drive assembly to drive the steel wire tightly binding the gastric stone to reciprocate, while the elastic pressure assembly provides elastic contraction force to keep the steel wire tightly binding the gastric stone, so as to saw the gastric stone apart.

[0088] S4: After the gastric stones are cut into fragments, stop the reciprocating drive component and operate the push component to retract the steel wire.

[0089] In the above embodiments of the present invention, the method for breaking up gastric stones further includes the following steps:

[0090] Remove the head cover of the pusher component from the endoscope slot, hold the housing assembly, and pull out the wire cannula, support sleeve, and wire to complete the lithotripsy operation.

[0091] The technical solutions of the present invention will be described in detail below through specific embodiments.

[0092] Refer again Figure 1-7As shown, one embodiment of the present invention provides a gastric stone lithotripsy device, comprising: a push handle 1, a first spring 2, a housing assembly 17 (upper housing 3 and lower housing 4), a head cover 5, a fixing tube 6, a steel wire conduit 7, a support sleeve 8, a steel wire 9, a motor on / off switch 10, a motor 11, a gear 12, a gear meshing frame 13, a steel wire fixing component 14, a second spring 15, and a motor fixing guide box 16.

[0093] A retractable steel wire 9 is fitted inside the wire cannula 7. A support sleeve 8 is installed at the end of the wire cannula 7 that extends beyond the steel wire 9, i.e., the left end shown in the figure. A fixing tube 6 is connected to the other end of the wire cannula 7, i.e., the right end shown in the figure. A headpiece 5 is connected to the fixing tube 6 and can engage with the endoscope's slot (not shown). The headpiece 5 is connected to the left end of the housing assembly 17, and a push handle 1 is connected to the right end of the housing assembly 17. The push handle 1 drives the steel wire 9 to extend through the headpiece 5, fixing tube 6, wire cannula 7, and support sleeve 8 to guide the steel wire 9 to the location of the gastric stone. The extended steel wire 9 forms a loop to enclose the gastric stone 18, specifically as shown in the figure. Figure 5 As shown.

[0094] The first spring 2 is mounted on the push handle 1. The first spring 2 is compressed as the push handle 1 is pushed and provides an elastic contraction force to tighten the steel wire 9 as the push handle 1 is released. The housing assembly 17 includes a detachable and mating upper housing 3 and a lower housing 4. A motor fixing guide box 16 is enclosed within the housing assembly 17, and a motor on / off switch 10 for controlling the start and stop of the motor 11 is provided on the housing assembly 17 (preferably on the lower housing 4). The motor fixing guide box 16 is linked to the push handle 1, and a guide rail 20 is also formed within the housing assembly 17, allowing the motor fixing guide box 16 to move on the guide rail 20. The motor fixing guide box 16 encloses the motor 11, gear 12, gear meshing frame 13, steel wire fixing member 14, and the second spring 15. The motor switch 10 is used to start and stop the motor 11. The wire fixing member 14 is connected to the wire 9 (the wire forming the wire loop side), and the wire fixing member 14 is linked to the push handle 1. The second spring 15 is disposed on the wire fixing member 14. The second spring 15 is compressed as the wire fixing member 14 is pushed and provides an elastic contraction force to tighten the wire 9 as the wire fixing member 14 retracts. Thus, the first spring 2 and the second spring 15 can provide an elastic contraction force to tightly bind the gastric stone 18 after the wire 9 is looped around it.

[0095] In the above structure, pushing the push handle 1 causes the motor fixing guide box 16 to move forward along the guide rail 20 inside the housing assembly 17 via a linkage structure. The steel wire fixing component 14 moves forward synchronously with the motor fixing guide box 16. At this time, the second spring 15 is compressed and stores elastic potential energy. Simultaneously, the steel wire 9 extends through the steel wire conduit 7 and the support sleeve 8 to form a collar and encircle the gastric stone 18. After releasing the push handle 1, the elastic contraction force of the first spring 2 and the second spring 15 pulls the push handle 1 and the steel wire fixing component 14 to move in the opposite direction, causing the steel wire 9 to retract and the collar to tightly bind the surface of the gastric stone 18.

[0096] The gear meshing frame 13 and the gear 12 form a reciprocating motion structure. This reciprocating motion structure is connected to the steel wire 9. The motor 11 drives the reciprocating motion structure so that the steel wire 9, while tightly bound to the gastric stone 18, undergoes reciprocating frictional motion to cut the gastric stone 18. Specifically, in the reciprocating motion structure, the gear 12 meshes with the gear meshing frame 13, and the gear meshing frame 13 is connected to the steel wire 9 (the steel wire forming the other side of the steel wire collar). The motor 11 drives the gear 12 to rotate, causing the gear meshing frame 13 to reciprocate, thereby driving the steel wire 9 to undergo reciprocating frictional motion to cut the gastric stone 18. Figure 5 The wire moves in a reciprocating friction motion in the direction indicated by the middle arrow. Since the wire fixing component 14 is also connected to the wire 9, the reciprocating motion of the wire 9 is directly transmitted to the wire fixing component 14, causing it to slide back and forth along the guide rail 20 inside the housing assembly 17.

[0097] When the above-mentioned gastric stone fragmentation instrument is used, the head cover 5 is fixed in the endoscope slot. The push handle 1 can be pushed to guide the steel wire 9 to the location of the gastric stone. The distance the push handle 1 is moved according to the size of the gastric stone. After the steel wire 9 is wrapped around the gastric stone 18, the push handle 1 is released. The first spring 2 and the second spring 15 provide elastic recoil force to make the steel wire tightly bind the gastric stone 18. Then, the motor switch 10 on the housing 4 is pressed to start the motor 11 to rotate and drive the gear 12 on the motor shaft. The gear drives the gear meshing frame 13 to reciprocate. Thus, the steel wire 9 fixedly connected to the gear meshing frame 13 also reciprocates. When the steel wire 9 reciprocates, the steel wire fixing part 14 and the second spring 15 reciprocate along the guide rail 20 under the drive of the steel wire 9. At the same time as the steel wire 9 moves, the elastic recoil force of the first spring 2 and the second spring 15 is applied to the gastric stone 18 through the steel wire 9. The gastric stone 18 is sawed apart when the steel wire 9 has a certain force applied and is reciprocating. After the gastric stone 18 is broken up, press the motor on / off switch 10 again to stop the motor 11. Then, operate the push handle 1 to retract the steel wire 9, remove the head cover 5 from the endoscope slot, hold the shell assembly 17 consisting of the upper shell 3 and the lower shell 4 with your left hand, and pull out the steel wire sheath 7, the support sheath 8, and the steel wire 9. At this point, mark the end of the surgery.

[0098] Of course, alternatively, this procedure can also be followed when operating the aforementioned gastric stone lithotripsy device. Secure the headgear 5 in the endoscope slot. The operator can hold the housing assembly 17 (comprising the upper housing 3 and lower housing 4) with their left hand and push the push handle 1 to its maximum stroke with their right hand, guiding the steel wire 9 to the location of the gastric stone. After wrapping around the gastric stone 18, slowly release the push handle 1. At this time, the first spring 2 and the second spring 15 retract, tightening the gastric stone 18. Press the motor switch 10 to start the motor 11. The motor shaft of the motor 11 rotates, driving the gear 12. The gear 12 drives the gear meshing frame 13, which in turn drives the steel wire 9. The steel wire 9 pulls the steel wire fixing component 14 and the second spring 15, causing them to slide and reciprocate on the guide rail 20 formed within the housing assembly 17 (comprising the upper housing 3 and lower housing 4). Under the elastic contraction force of the first spring 2 and the second spring 15, the steel wire 9 simultaneously tightens the gastric stone 18. The rapid reciprocating friction of the steel wire 9 saws the gastric stone 18 apart. After the gastric stone 18 is cut open, press the motor on / off switch 10 again to stop the motor 11. Then, operate the push handle 1 to retract the steel wire 9, remove the head cover 5 from the endoscope slot, hold the shell assembly 17 consisting of the upper shell 3 and the lower shell 4 with your left hand, and pull out the steel wire cannula 7, the support cannula 8 and the steel wire 9. The operation is complete.

[0099] Furthermore, in the structure of the above embodiments, alternatively, the reciprocating motion structure of the steel wire 9 under applied pressure is not necessarily the structure of gear 12 and gear meshing frame 13. It can also adopt a structure of a rotary cam and a hydraulic cylinder, with the rotary cam connected to the hydraulic cylinder, the hydraulic cylinder connected to the steel wire 9, and the motor 11 driving the rotary cam to rotate, thus pushing the hydraulic cylinder to reciprocate and drive the steel wire 9 to reciprocate. Of course, in other alternative embodiments, the reciprocating motion structure of the steel wire 9 under applied pressure can also be achieved by a structure in which a motor shaft drives a rocking gear 19 to rock, such as... Figure 8 As shown, the oscillating gear 19 is connected to the motor shaft of the motor 11, and the oscillating gear 19 is directly connected to the steel wire 9. The motor shaft drives the oscillating gear 19 to oscillate back and forth in counterclockwise and clockwise directions to drive the steel wire 9 to reciprocate.

[0100] Therefore, this invention enables the steel wire to perform reciprocating frictional motion while tightly binding the gastric stone, similar to the cutting action of a micro-toothed saw. Compared to the existing method of simply pulling the steel wire, this method can cut through hard and smooth gastric stones more quickly, avoiding repeated pulling operations due to the stone slipping out of the loop or its high hardness, significantly improving stone fragmentation efficiency. Simultaneously, this invention ensures the steel wire remains tightly bound to the surface of the gastric stone, effectively avoiding the problem of the stone easily slipping out of the loop when pulling the wire in existing technologies. This provides stable conditions for the surgeon's operation, reducing the number of adjustments required during the procedure. Therefore, this invention improves stone fragmentation efficiency and enhances operational stability, avoiding the time wasted on repeated operations and adjustments, thereby effectively shortening the overall surgical time, reducing patient discomfort during surgery and the risk of complications that may arise from prolonged operation. At the same time, stable operation reduces the potential for accidental damage to the gastric mucosa caused by repeated pulling, improving surgical safety. Thus, this invention solves the problem of difficult gastric stone fragmentation, improving surgical efficiency and safety.

[0101] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to the process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0102] The above description is merely an embodiment of the present invention, which enables those skilled in the art to understand and implement the invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

Claims

1. A lithotripsy device for gastric stones, characterized in that, include: A steel wire, which forms a loop to secure a gastric stone; A pushing component, wherein the pushing component drives the wire to extend and guide the wire to the location of the gastric stone, the pushing component comprising: A wire conduit, wherein a retractable wire is sleeved inside the wire conduit; A support sleeve is installed at the end of the wire guide tube that extends out of the wire; A fixing tube, which is connected to the other end of the wire conduit; A headgear, which is connected to the fixing tube; A push handle drives the steel wire to extend through the headgear, the fixing tube, the steel wire conduit, and the support sleeve to introduce the steel wire to the location of the gastric stone; An elastic compression assembly, wherein after the steel wire is looped around the gastric stone, the elastic compression assembly provides an elastic contraction force to tightly bind the gastric stone with the steel wire, the elastic compression assembly comprising: A first spring is disposed on the push handle, the first spring being compressed as the push handle is pushed and providing an elastic contraction force to tighten the steel wire as the push handle is released; A wire fixing component, wherein the wire fixing component is connected to the wire and is linked to the push handle; A second spring is disposed on the wire fixing member. The second spring is compressed as the wire fixing member is pushed and provides an elastic contraction force to tighten the wire as the wire fixing member retracts. A reciprocating drive assembly is drivably connected to the steel wire to drive the steel wire to reciprocate while tightly binding the gastric stone to cut the gastric stone.

2. The gastric stone lithotripsy device according to claim 1, characterized in that, The headgear engages with the endoscope's slot.

3. The gastric stone lithotripsy device according to claim 1, characterized in that, The reciprocating drive component includes: A reciprocating motion structure, wherein the reciprocating motion structure is connected to the steel wire; An electric motor is connected to the reciprocating motion structure for transmission. The electric motor drives the reciprocating motion structure to make the steel wire reciprocate in a state of tightly binding the gastric stone in order to cut the gastric stone. A motor fixing guide box is movable and encloses the motor, the reciprocating motion structure, the steel wire fixing component, and the second spring, and the motor fixing guide box is linked to the push handle.

4. The gastric stone lithotripsy device according to claim 3, characterized in that, The reciprocating motion structure includes a gear and a gear meshing frame, wherein the gear meshing frame meshes with the gear and is connected to the steel wire. The motor drives the gear to rotate, thereby causing the gear meshing frame to reciprocate and drive the steel wire to reciprocate.

5. The gastric stone lithotripsy device according to claim 3, characterized in that, The reciprocating motion structure includes a rotary cam and a hydraulic cylinder, wherein the rotary cam is connected to the hydraulic cylinder, the hydraulic cylinder is connected to the steel wire, and the motor drives the rotary cam to rotate, thereby pushing the hydraulic cylinder to perform reciprocating motion and driving the steel wire to perform reciprocating motion.

6. The gastric stone lithotripsy device according to claim 3, characterized in that, The reciprocating motion structure includes a rocking gear, wherein the rocking gear is connected to the motor shaft of the motor and to the steel wire, and the motor shaft drives the rocking gear to rock to drive the steel wire to reciprocate.

7. The gastric stone lithotripsy device according to any one of claims 3-6, characterized in that, The gastric stone lithotripsy device also includes: A housing assembly is connected between the head cover and the push handle. The housing assembly includes a detachable and mating upper housing and a lower housing. The housing assembly encloses the motor fixing guide box and is provided with a motor on / off switch for controlling the start and stop of the motor.

8. The gastric stone lithotripsy device according to claim 7, characterized in that, The housing assembly has a guide rail formed inside it. The motor fixing guide box moves on the guide rail. The wire fixing component moves with the overall movement of the motor fixing guide box. The wire fixing component moves back and forth along the guide rail when the wire makes reciprocating motion.

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