A stone extraction and fragmentation device for lithotripsy

Abstract

This invention relates to a stone retrieval and lithotripsy device for stone surgery, belonging to the field of stone retrieval and lithotripsy technology, and solving the problem of difficulty in capturing and removing large stones. The stone retrieval and lithotripsy device of this invention includes: a stone-catching basket, a relatively rotating outer tube and an inner rotating rod, a rotating disk, and a sliding rod; the sliding rod has a spherical protrusion that mates with an arc-shaped guide groove on the rotating disk and is fixedly connected to the stone-catching basket; the rotating disk rotates synchronously with the inner rotating rod; a linear groove for mounting the sliding rod is formed on the end face of the outer tube; when the inner rotating rod drives the rotating disk to rotate, the spherical protrusion slides along the arc-shaped guide groove, simultaneously pushing the sliding rod out of the linear groove to achieve the expansion and contraction of the stone-catching basket; the inner rotating rod has an electrohydraulic lithotripsy channel inside, which is used to introduce an electrohydraulic lithotripsy probe for electrohydraulic lithotripsy of the stone. This invention achieves the capture and electrohydraulic lithotripsy of ultra-large stones, improving the success rate of surgery.

Description

Technical Field

[0001] This invention relates to the field of surgical instruments for kidney stones, and more particularly to a stone removal and fragmentation device for kidney stone surgery. Background Technology

[0002] Common bile duct stones are a common and frequently occurring disease in my country. When stones obstruct the common bile duct, they can easily lead to serious complications such as acute cholangitis, obstructive jaundice, and acute biliary pancreatitis. Patients often present with chills, high fever, abdominal pain, and jaundice; in severe cases, septic shock may even occur. Endoscopic retrograde cholangiopancreatography (ERCP) is the most common treatment for common bile duct stones. Compared to traditional open surgery or modern laparoscopic bile duct exploration and stone removal, ERCP has advantages such as minimal invasiveness, high safety, and rapid recovery, and is therefore gradually becoming a first-line treatment method.

[0003] Commonly used ERCP stone retrieval consumables in clinical practice mainly include stone retrieval balloons and stone retrieval baskets: stones smaller than 1 cm in diameter are mostly retrieved using balloons, while stones larger than 1 cm in diameter are mostly retrieved using baskets. For giant common bile duct stones larger than 1.5 cm in diameter, ERCP-assisted mechanical stone retrieval with a basket or direct visualization with a transoral cholangioscopy followed by stone fragmentation and retrieval is used. However, current ERCP techniques still have significant shortcomings in handling giant common bile duct stones larger than 1.5 cm in diameter: 1) Giant common bile duct stones often cause common bile duct obstruction, and due to the narrow space, it is difficult to retrieve giant common bile duct stones by inserting a stone fragmentation basket via ERCP; 2) The efficiency of mechanical stone fragmentation with a basket is low, and some hard stones are difficult to crush by the basket; 3) If the stone cannot be crushed after retrieval, and the stone cannot be pulled out of the common bile duct through the basket, the stone fragmentation basket cannot be removed, and only general anesthesia bile duct exploration surgery can be chosen, which carries high risks.

[0004] Therefore, for the need to remove and fragment stones in very large common bile duct stones, there is a need to provide a stone removal and fragmentation device for stone surgery to achieve integrated operation of stone capture, fragmentation and removal, thereby improving the success rate of stone removal. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a stone removal and lithotripsy device for stone removal surgery, in order to solve the problem that large stones are difficult to capture and remove during existing stone removal surgeries.

[0006] The objective of this invention is mainly achieved through the following technical solutions: A stone retrieval and lithotripsy device for kidney stone surgery includes: a stone-catching basket, an outer fixed tube, an inner rotating rod, a rotating disk, and a sliding rod; one end of the sliding rod is provided with a spherical protrusion, and the other end is fixedly connected to the spoke end of the stone-catching basket; the inner rotating rod is sleeved inside the outer fixed tube and the two can rotate relative to each other; the rotating disk is disposed outside the inner rotating rod and can rotate synchronously with the inner rotating rod; a linear groove is formed on the end face of the outer fixed tube, and an arc-shaped guide groove is formed on the end face of the rotating disk opposite to the outer fixed tube. The sliding rod is slidably installed in the linear groove, and the spherical protrusion is slidably installed in the arc-shaped guide groove. When the inner rotating rod drives the rotating disk to rotate, the spherical protrusion slides from one end of the arc-shaped guide groove to the other end, while simultaneously pushing the sliding rod to slide out of the linear groove to realize the expansion or contraction of the stone-catching basket. The inner rotating rod is provided with a hydraulic-electric lithotripsy channel extending along its own axis. The hydraulic-electric lithotripsy channel is used to pass through the hydraulic-electric lithotripsy probe to realize hydraulic-electric lithotripsy of stones.

[0007] Furthermore, a nose cone is provided at one end of the inner rotating rod near the stone-catching basket; the nose cone is used to limit the rotation disk; the end of the nose cone extends into the interior of the stone-catching basket, so that the electrohydraulic lithotripsy probe is away from the starting section of the stone-catching basket, preventing the electrohydraulic lithotripsy probe from damaging the stone-catching basket.

[0008] Furthermore, the nasal cone head includes: a cylindrical thin tube, a nasal cone tube, and a cylindrical tube; the cylindrical thin tube is disposed at the small end of the nasal cone tube, the cylindrical tube is disposed at the large end of the nasal cone tube, and the cylindrical tube is fixedly connected to the inner rotating rod.

[0009] Furthermore, multiple arc-shaped guide grooves are equally spaced along the circumference of the rotating disk; correspondingly, multiple linear sliding grooves are equally spaced along the circumference of the outer fixed tube.

[0010] Furthermore, a rectangular hole is provided at the center of the rotating disk, and a rectangular positioning part is provided at the end of the inner rotating rod, the rectangular positioning part being sleeved inside the rectangular hole.

[0011] Furthermore, one end of the arc-shaped guide groove is close to the rectangular hole, and the other end is close to the edge of the rotating disk.

[0012] Furthermore, a limiting ring is provided at the end of the inner rotating rod, which is used to limit the axial displacement of the outer fixed tube relative to the inner rotating rod.

[0013] Furthermore, the stone-catching basket is composed of multiple basket spokes; the ends of the basket spokes are provided with vertical rods; the vertical rods are fixedly connected to the outer end of the sliding rod.

[0014] Furthermore, the operating end of the outer tube is provided with a grip handle; the grip handle includes two symmetrically arranged annular grip portions.

[0015] Furthermore, the operating end of the inner rotating rod is provided with a rotating handle, which has a T-shaped structure.

[0016] The technical solution of this invention can achieve at least one of the following effects: 1. The lithotripsy device for stone removal in surgery of the present invention uses a rotating disk and an outer fixed tube to limit the position of a sliding rod. When the rotating disk rotates, it drives a spherical protrusion to slide along an arc-shaped guide groove. The spherical protrusion at one end of the sliding rod moves along the arc-shaped guide groove, pushing the sliding rod outward in the linear groove, thereby causing the spokes of the stone-catching basket to expand outward, forming a larger stone-catching space, which is convenient for catching large stones. When the rotating disk rotates in the opposite direction, it can drive the sliding rod to retract, thereby pulling the stone-catching basket to shrink, realizing the flexible expansion and contraction of the stone-catching basket. This enables the successful capture of large stones and the tightening of the basket after capture to constrict the stone. The contraction of the basket confines the stone between the stone-catching basket and the nasal cone to prevent stone displacement, improves the success rate of electrohydraulic directional lithotripsy, and provides a certain constricting force when the stone-catching basket is tightened, achieving the effect of controllable mechanical lithotripsy and electrohydraulic lithotripsy working together.

[0017] 2. The lithotripsy device for stone surgery of the present invention has an electrohydraulic lithotripsy channel arranged along its axis inside the inner rotating rod, which can be connected to the electrohydraulic lithotripsy probe, thus integrating the electrohydraulic lithotripsy function; at the same time, a nasal cone is arranged to extend into the inside of the stone-catching basket so that the protruding end of the electrohydraulic lithotripsy probe can contact the stone for lithotripsy, and the probe electrode is far away from the stone-catching basket to avoid damage to the basket structure; after the stone is caught in the stone-catching basket, the lithotripsy operation can be performed directly without changing instruments, which greatly shortens the operation time and reduces the operation risk. It is especially suitable for treating large common bile duct stones with a diameter greater than 1.5 cm, effectively solving the problem of stones that are too large to be captured and removed.

[0018] 3. The lithotripsy device for stone removal surgery of the present invention, by setting multiple circumferentially evenly distributed arc-shaped guide grooves and linear sliding grooves, enables the sliding rods to synchronously extend or retract along the radial direction of the outer fixed tube when the rotating disk rotates, ensuring the stability and reliability of the expansion and contraction of the stone-catching basket. Furthermore, the rectangular hole at the center of the rotating disk cooperates and sleeves with the rectangular positioning part at the end of the inner rotating rod, achieving synchronous rotation of both while enhancing the structural stability, preventing deviation or swaying during rotation, and improving the precision of the surgical operation.

[0019] 4. The lithotripsy device for stone removal surgery of the present invention has a limiting ring at the end of the inner rotating rod, which effectively restricts the axial displacement of the outer fixed tube relative to the inner rotating rod. This allows the nasal cone, rotating disk, outer fixed tube and limiting ring to be pressed together in the axial direction in sequence. The end faces of the arc-shaped guide groove and the linear sliding groove are in close contact with each other, so that the sliding rod can stably extend or retract from the linear sliding groove. During the operation, this ensures the reliability of instrument operation and enhances the safety of the operation.

[0020] 5. The lithotripsy device for stone surgery of the present invention belongs to the category of stone retrieval basket instruments in the field of ERCP. By setting an electrohydraulic lithotripsy channel in the inner rotating rod and introducing a coaxially set electrohydraulic lithotripsy (EHL) probe, it can realize the integrated operation of "large stone capture - stone clamping and positioning - directional lithotripsy - stone removal" under the guidance of endoscopic lens and X-ray fluoroscopy. Moreover, during the lithotripsy process, it can realize the combination of basket clamping and lithotripsy (mechanical lithotripsy) and electrohydraulic lithotripsy to fragment the stone, solving the problems of basket jamming, low lithotripsy efficiency, and poor positioning and fixation in the conventional stone retrieval process for large and hard common bile duct stones.

[0021] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0022] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Figure 1 The present invention relates to a stone removal and lithotripsy device for stone surgery; Figure 2 This is a partially enlarged view of the basket end of the lithotripsy device for stone removal surgery of the present invention; Figure 3 This is a partially enlarged view of the operating end of the stone removal and lithotripsy device for stone surgery of the present invention; Figure 4 This is a schematic diagram of the expanded state of the basket of the lithotripsy device for stone removal surgery according to the present invention. Figure 5 This is a schematic diagram of the groove end of the outer tube of the lithotripsy device for stone removal surgery of the present invention; Figure 6 This is a schematic diagram of the inner rotating rod of the stone removal and lithotripsy device for stone surgery of the present invention; Figure 7This is a schematic diagram of the nasal cone end of the inner rotating rod of the lithotripsy device for stone removal surgery of the present invention. Figure 8 This is a schematic diagram of the sliding rod of the lithotripsy device for stone removal surgery of the present invention; Figure 9 This is a schematic diagram showing the cooperation state between the sliding rod and the rotating disk of the lithotripsy device for stone removal surgery according to the present invention. Figure 10 This is a schematic diagram showing the cooperation state between the sliding rod and the outer tube of the stone removal and lithotripsy device for stone surgery of the present invention. Figure 11 This is one of the schematic diagrams showing the coordination state between the sliding rod, the outer fixed tube, and the inner rotating rod of the lithotripsy device for stone removal surgery of the present invention; Figure 12 This is the second schematic diagram showing the coordination between the sliding rod, the outer fixed tube, and the inner rotating rod of the lithotripsy device for stone removal surgery of the present invention. Figure 13 This is a schematic diagram showing the working relationship between the movable disc and the nasal cone of the lithotripsy device for stone removal surgery according to the present invention.

[0023] Figure label: 1-Stone-catching basket; 2-Outer fixed tube; 3-Inner rotating rod; 4-Holding handle; 5-Rotating handle; 6-Rotating disk; 7-Nose cone; 8-Moving disk; 9-Pull string; 10-Sliding rod; 11-Spherical protrusion; 101-Vertical rod part; 201-Central through hole; 202-Linear groove; 301-Rectangular positioning part; 302-Limiting ring; 303-Hydraulic-electric lithotripsy channel; 601-Rectangular hole; 602-Arc-shaped guide groove; 701-Cylindrical tube; 702-Nose cone tube; 703-Cylindrical tube; 704-Positioning bead; 801-Spiral groove. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0025] Example 1 A specific embodiment of the present invention discloses a stone removal and fragmentation device for stone surgery, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, it includes: a stone-catching basket 1, an outer fixed tube 2, an inner rotating rod 3, a rotating disk 6, and a sliding rod 10; the stone-catching basket 1 is composed of multiple basket spokes; one end of the sliding rod 10 is provided with a spherical protrusion 11, and the other end is fixedly connected to the end of the spoke of the stone-catching basket 1; the inner rotating rod 3 is sleeved inside the outer fixed tube 2 and the two can rotate relative to each other; the rotating disk 6 is located outside the inner rotating rod 3 and can rotate synchronously with the inner rotating rod 3; a linear groove 202 is opened on the end face of the outer fixed tube 2, and an arc-shaped guide groove 60 is provided on the end face of the rotating disk 6 opposite to the outer fixed tube 2. 2; The sliding rod 10 is slidably installed in the linear groove 202, and the spherical protrusion 11 is slidably installed in the arc-shaped guide groove 602; When the inner rotating rod 3 drives the rotating disk 6 to rotate, the spherical protrusion 11 slides from one end of the arc-shaped guide groove 602 to the other end, and at the same time pushes the sliding rod 10 to slide out of the linear groove 202 to realize the expansion of the stone-catching basket 1; The inner rotating rod 3 is provided with a hydraulic-electric lithotripsy channel 303 extending along its own axis, and the hydraulic-electric lithotripsy channel 303 is used to pass in a hydraulic-electric lithotripsy probe to realize hydraulic-electric lithotripsy of stones.

[0026] Specifically, the inner rotating rod 3 is sleeved and installed in the central through hole 201 of the outer fixed tube 2; the central through hole 201 is a cylindrical hole, which allows the inner rotating rod 3 to rotate relative to the outer fixed tube 2.

[0027] In this embodiment, the stone-catching basket 1 is made of nickel-titanium alloy (shape memory alloy), which has the characteristic of restoring a pre-set shape at a specific temperature and is easy to stretch and deform. When the stone-catching and lithotripsy device is pushed to the target position through the endoscopic channel, the stone-catching basket 1 gradually restores its preset expansion shape under the patient's body temperature environment, making it easy to catch the stone. For stones with larger diameters or harder textures, this invention can directly fragment the stones through the electrohydraulic lithotripsy probe after capture by the basket, avoiding excessive dilation of the sphincter or conversion to surgery, significantly improving the success rate of ERCP treatment and reducing patient trauma and hospitalization time.

[0028] The outer diameter of the outer tube 2 of this invention is controlled at 4mm, which can pass smoothly through the 4.2mm working channel of the mainstream duodenoscope, and the electrohydraulic lithotripsy channel is set at 0.9mm, which is compatible with the common 0.88mm electrohydraulic lithotripsy probe. It can be applied without replacing the existing ERCP system and has good clinical applicability.

[0029] like Figure 2 , Figure 4 , Figure 6As shown, the inner rotating rod 3 is provided with a nose cone 7 at one end near the stone-catching basket 1; the nose cone 7 is used to limit the rotation disk 6; the end of the nose cone 7 extends into the interior of the stone-catching basket 1, keeping the electrohydraulic lithotripsy probe away from the starting section of the stone-catching basket 1, preventing the electrohydraulic lithotripsy probe from damaging the stone-catching basket 1. The nose cone 7 is made of high-strength, heat-resistant insulating material (such as PEEK or ceramic), and the nose cone extends forward by about 2–3 mm and is provided with a central guide hole for positioning the electrode outlet of the electrohydraulic lithotripsy probe and for fixing the stone block against it; at the same time, it can keep the electrode away from the starting part of the stone-catching basket 1, keeping the basket spokes at a certain distance from the electrode, protecting the basket from damage by electrohydraulic lithotripsy.

[0030] Furthermore, such as Figure 7 As shown, the nasal cone tip 7 includes: a cylindrical thin tube 701, a nasal cone tube 702, and a cylindrical tube 703; the cylindrical thin tube 701 is located at the small end of the nasal cone tube 702, and the cylindrical tube 703 is located at the large end of the nasal cone tube 702, and the cylindrical tube 703 is fixedly connected to the inner rotating rod 3. The nasal cone tube 702 has a gradually changing diameter structure, with the outer diameter of the cylindrical thin tube 701 equal to the outer diameter of the small end of the nasal cone tube 702, and the outer diameter of the cylindrical tube 703 equal to the outer diameter of the large end of the nasal cone tube 702; the internal through holes of the cylindrical thin tube 701, the nasal cone tube 702, and the cylindrical tube 703 communicate with the electrohydraulic lithotripsy channel 303 to ensure that the electrohydraulic lithotripsy probe can pass smoothly. Traditional electrohydraulic lithotripsy under cholangioscopy often presents difficulties in lithotripsy operations due to unstable stone positions and difficulty in electrode alignment. The present invention fixes the position of the stone by using the stone-catching basket 1 and maintains the coaxial positioning of the electrode by using the central guide hole of the nasal cone 7, so that the energy of electrohydraulic lithotripsy is concentrated on the stone, which significantly improves the stone-breaking efficiency.

[0031] Specifically, the cylindrical tube 703 is fixedly installed at the end of the rectangular positioning part 301, which can axially limit the rotating disk 6, ensuring the mutual pressing effect between the rotating disk 6 and the outer fixed tube 2, thereby ensuring the stability of the sliding rod 10 during its movement in the linear groove 202. The extension of the cylindrical thin tube 701 extends into the interior of the rock-catching basket 1, forming a front-mounted guide structure, so that when the electrohydraulic lithotripsy probe is extended, it is located in the middle of the rock-catching basket 1, avoiding contact with the basket during electrohydraulic lithotripsy and preventing damage, while improving the accuracy and safety of the lithotripsy operation.

[0032] In one specific embodiment of the present invention, such as Figure 9 As shown, one end of the arc-shaped guide groove 602 is close to the rectangular hole 601, and the other end is close to the edge of the rotating disk 6.

[0033] Furthermore, such as Figure 5 , Figure 9 , Figure 10 , Figure 11 , Figure 12As shown, multiple arc-shaped guide grooves 602 are equally spaced along the circumference of the rotating disk 6; correspondingly, multiple linear sliding grooves 202 are equally spaced along the circumference of the outer fixed tube 2.

[0034] Specifically, such as Figure 8 , Figure 11 , Figure 12 As shown, a spherical protrusion 11 is provided on the side of the sliding rod 10; preferably, the spherical protrusion 11 is hemispherical.

[0035] Furthermore, such as Figure 11 , Figure 12 As shown, one end face of the arc-shaped guide groove 602 on the rotating disk 6 is in contact with one end face of the linear slide groove 202 on the outer fixed tube 2. The spherical protrusion 11 is embedded in the arc-shaped guide groove 602 and can slide along the arc-shaped guide groove 602. The sliding rod 10 is embedded in the linear slide groove 202 and can slide linearly along the linear slide groove 202. Therefore, when the rotating disk 6 rotates under the drive of an external force, the arc-shaped guide groove 602 drives the spherical protrusion 11 to move from the center of the rotating disk 6 to the edge of the rotating disk 6 (or from its edge to the center), thereby pushing the sliding rod 10 to move along the linear slide groove 202, realizing the radial movement of the sliding rod 10 relative to the outer fixed tube 2, and thus driving the stone-catching basket 1 to realize the opening and closing action.

[0036] In one specific embodiment of the present invention, a rectangular hole 601 is provided at the center of the rotating disk 6, and a rectangular positioning part 301 is provided at the end of the inner rotating rod 3. The rectangular positioning part 301 is sleeved inside the rectangular hole 601. The inner rotating rod 3 achieves circumferential positioning through the rectangular positioning part 301 and the rectangular hole 601 of the rotating disk 6, effectively transmitting torque so that the rotating disk 6 rotates synchronously with the inner rotating rod 3.

[0037] Furthermore, a limiting ring 302 is provided at the end of the inner rotating rod 3. The limiting ring 302 is used to limit the axial displacement of the outer fixed tube 2 relative to the inner rotating rod 3. The limiting ring 302 abuts against the outer end of the outer fixed tube 2 to prevent the outer fixed tube 2 from undergoing axial displacement during operation, and to ensure the relative position stability of the outer fixed tube 2, the rotating disk 6 and the nose cone 7, thereby ensuring the structural reliability and motion accuracy of the equipment during operation.

[0038] In this embodiment, as Figure 10As shown, the end of the spokes of the basket is provided with a vertical rod portion 101; the vertical rod portion 101 is fixedly connected to the outer end of the sliding rod 10. Further, multiple concave axial grooves are provided on the side of the rotating disk 6. When the sliding rod 10 is fully retracted into the outer fixed tube 2, the axial grooves align with the vertical rod portion 101 at the outer end of the sliding rod 10, and the vertical rod portion 101 can be inserted into the axial grooves on the outer surface of the rotating disk 6, forming an integral part with the rotating disk 6. During the process of the stone-retrieving and lithotripsy device being moved from inside the endoscope or retracted from the endoscope during stone retrieval, the vertical rod portion 101 is prevented from protruding from the rotating disk 6, thus avoiding an increase in the overall diameter of the device and ensuring the smooth operation of the stone retrieval.

[0039] Furthermore, in one specific embodiment of the present invention, compared to existing products, the stone retrieval and fragmentation device of the present invention can be directly used with an endoscope (cholecystoscope / duodenoscope / gastroscopy). The basket extends into the endoscope channel in a low-temperature contracted state and unfolds into a standard shape after being heated by body temperature. The endoscope channel can also guide the basket and the overall structure of the device. Alternatively, an outer sheath that can slide relative to the axis of the outer tube 2 is fitted over the outer tube 2. The outer sheath constrains the shape of the basket, facilitating its placement inside the patient's body.

[0040] Furthermore, such as Figure 3 As shown, the operating end of the outer tube 2 is provided with a grip handle 4; the grip handle 4 includes two symmetrically arranged annular grip portions.

[0041] Furthermore, such as Figure 3 As shown, the operating end of the inner rotating rod 3 is provided with a rotating handle 5, which has a T-shaped structure.

[0042] Furthermore, for easier operation, the lateral section of the rotating handle is perpendicular to the axis of the inner rotating rod, such as... Figure 3 , Figure 6 As shown. During the operation, the doctor can rotate the inner rotating rod 3 by rotating the handle 5, which in turn drives the rotating disk 6 to rotate. The arc-shaped guide groove 602 on the rotating disk 6 and the linear sliding groove 202 on the outer fixed tube 2 cooperate with each other, so that the sliding rod 10 and the spherical protrusion 11 can slide smoothly between the two, so as to realize the radial extension or retraction of the sliding rod 10, thereby realizing the expansion or tightening of the stone-catching basket 1.

[0043] A further improved design of the present invention is as follows: In order to achieve precise opening and closing control of the stone-catching net basket 1, a movable disk 8 is sleeved on the nose cone head 7, and multiple pull strings 9 are provided on the movable disk 8, with the ends of the pull strings 9 fixedly connected to the spokes of the net basket; as shown Figure 2 , Figure 4 , Figure 13 As shown.

[0044] Specifically, the drawstring 9 has an arc-shaped structure; and the connection point between the drawstring 9 and the basket spokes is lower than the center of the basket spokes, such as... Figure 13 As shown.

[0045] Specifically, the movable disc 8 slides with the nasal cone head 7, and the movable disc 8 has a spiral groove 801 inside. The nasal cone head 7 has a positioning bead 704 on the outside that cooperates with the spiral groove 801. When the inner rotating rod 3 drives the nasal cone head 7 to rotate, under the guidance of the positioning bead 704 and the spiral groove 801, the movable disc 8 moves up and down along the axis of the nasal cone head 7. Then, the pull string 9 drives the spokes of the basket to move synchronously. With the synchronous action of the extension and retraction of the sliding rod 10, the stone-catching basket 1 can be accurately expanded and contracted to ensure the effective capture and tightening of stones.

[0046] During implementation, the operator (doctor) holds the grip handle 4 with one hand, and uses the other hand to operate the rotating handle 5 to rotate the inner rotating rod 3. When the inner rotating rod 3 rotates clockwise (counterclockwise), the spherical protrusion 11 moves along the arc-shaped guide groove 602 toward the edge of the rotating disk 6, the sliding rod 10 extends out from the inside of the outer fixed tube 2, and the sliding rod 10 drives the basket spokes to unfold outward. At the same time, the positioning bead 704 slides along the spiral groove 801 to push the moving disk to move upward along the nose cone head 7, and the pull string 9 pushes the basket spokes outward. The stone-catching basket 1 gradually expands to the maximum working state.

[0047] When the inner rotating rod 3 rotates in the opposite direction (clockwise), the spherical protrusion 11 moves back towards the center of the rotating disk 6 along the arc-shaped guide groove 602, causing the sliding rod 10 to retract into the outer fixed tube 2, and the basket spokes retract towards the center; at the same time, the positioning bead 704 slides in the opposite direction along the spiral groove 801, causing the moving disk 8 to move downward along the axis of the nose cone 7, and the pull string 9 pulls the basket spokes downward to retract inward, and the stone-catching basket 1 gradually closes, firmly binding the stone in the center of the stone-catching basket 1 and contacting the end of the nose cone 7, so that the electrohydraulic lithotripsy probe can perform electrohydraulic lithotripsy when it extends from the end of the nose cone 7.

[0048] The entire operation can be completed simply by controlling the bidirectional rotation of the rotating handle 5. The structure is closely linked and the action is highly synchronized, which significantly improves the control precision and ease of operation of the basket opening and closing during surgery, thereby improving the success rate of the basket in capturing and fragmenting ultra-large stones.

[0049] It is worth noting that the stone removal and fragmentation device for gallstone surgery of the present invention can not only be used to remove and fragment gallstones, but also can be used in conjunction with a gastroscopy or duodenoscope to treat gastric stones or duodenal stones, and has a wide range of applications; the specific applications of the present invention are not intended to limit the scope of protection of the present invention.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A stone-removing and lithotripsy device for stone surgery, characterized in that, include: Stone-catching basket, outer fixed tube, inner rotating rod, rotating disk and sliding rod; One end of the sliding rod is provided with a spherical protrusion, and the other end is fixedly connected to the end of the stone-catching basket; the inner rotating rod is sleeved inside the outer fixed tube and the two can rotate relative to each other; the rotating disk is located outside the inner rotating rod and can rotate synchronously with the inner rotating rod. A linear groove is formed on the end face of the outer fixed tube, and an arc-shaped guide groove is formed on the end face of the rotating disk opposite to the outer fixed tube. The sliding rod is slidably installed in the linear groove, and the spherical protrusion is slidably installed in the arc-shaped guide groove. When the inner rotating rod drives the rotating disk to rotate, the spherical protrusion slides from one end of the arc-shaped guide groove to the other end, and at the same time pushes the sliding rod to slide out of the linear groove to realize the expansion or contraction of the rock-catching basket. A nose cone is provided at the end of the inner rotating rod near the rock-catching basket. The nose cone is used to limit the rotation disk. The end of the nose cone extends into the interior of the rock-catching basket, so that the electrohydraulic lithotripsy probe is away from the starting section of the rock-catching basket, preventing the electrohydraulic lithotripsy probe from damaging the rock-catching basket. A movable disc is fitted onto the nose cone head, and multiple drawstrings are provided on the movable disc. The drawstrings have an arc-shaped structure. The stone-catching net basket is composed of multiple basket spokes. The end of the drawstring is fixedly connected to the basket spoke, and the connection position between the drawstring and the basket spoke is lower than the center of the basket spoke. The movable disc slides with the nose cone head. When the inner rotating rod drives the nose cone head to rotate, the movable disc moves up and down along the axis of the nose cone head, and the basket spokes move synchronously through the drawstrings.

2. The lithotripsy device for stone removal surgery according to claim 1, characterized in that, The inner rotating rod has a hydraulic-electric lithotripsy channel extending along its own axis. The hydraulic-electric lithotripsy channel is used to pass a hydraulic-electric lithotripsy probe to achieve hydraulic-electric lithotripsy of stones.

3. The lithotripsy device for stone removal surgery according to any one of claims 1-2, characterized in that, Multiple arc-shaped guide grooves are equally spaced along the circumference of the rotating disk; correspondingly, multiple linear sliding grooves are equally spaced along the circumference of the outer fixed tube.

4. The lithotripsy device for stone removal surgery according to any one of claims 1-2, characterized in that, The rotating disk has a rectangular hole at its center, and the end of the inner rotating rod has a rectangular positioning part, which is fitted inside the rectangular hole.

5. The lithotripsy device for stone removal surgery according to claim 4, characterized in that, One end of the arc-shaped guide groove is close to the rectangular hole, and the other end is close to the edge of the rotating disk.

6. The lithotripsy device for stone removal surgery according to claim 5, characterized in that, The end of the inner rotating rod is provided with a limiting ring, which is used to limit the axial displacement of the outer fixed tube relative to the inner rotating rod.

7. The lithotripsy device for stone removal surgery according to claim 1, characterized in that, The basket spokes are provided with vertical rods at their ends; the vertical rods are fixedly connected to the outer end of the sliding rod.

8. The lithotripsy device for stone removal surgery according to claim 1, characterized in that, The operating end of the outer tube is provided with a grip handle; the grip handle includes two symmetrically arranged annular grip parts.

9. The lithotripsy device for stone removal surgery according to claim 1, characterized in that, The operating end of the inner rotating rod is provided with a rotating handle, which has a T-shaped structure.

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