A stone removal device and method of using the same

Abstract

The present invention provides a stone removal device and a method for using the same, and belongs to the technical field of medical devices. The stone removal device includes an optical fiber, a basket structure, and a limiting assembly. The optical fiber is used to transmit laser light. The basket structure includes a plurality of basket connecting wires arranged around the optical fiber, and the proximal ends of all the basket connecting wires are fixed to the optical fiber, and the distal ends of all the basket connecting wires are connected to each other to form a basket body on the distal side of the optical fiber. The limiting assembly includes a limiting structure and a control member. The limiting structure is sleeved outside the optical fiber, the limiting structure is located on the proximal side of the basket body, the distal end of the control member is connected to the limiting structure, and the proximal end of the control member extends toward the proximal end of the optical fiber. The control member is used to control the expansion or retraction of the limiting structure on the optical fiber to increase or decrease the diameter of the limiting structure. The present application fixes the optical fiber to the instrument channel of the insertion part by setting a limiting structure, stabilizes the position of the optical fiber in the instrument channel, and improves the coaxiality of the optical fiber and the instrument channel.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a stone removal device and a method for using the same. Background Art

[0002] Laser lithotripsy is a minimally invasive surgery mainly used to treat urinary stones, such as kidney stones, ureteral stones and bladder stones. This technology is widely used in clinical practice due to its high safety, low trauma and fast recovery.

[0003] Holmium laser lithotripsy is an advanced laser lithotripsy technique. The energy of holmium laser can vaporize the water between the end of the optical fiber and the stone, forming tiny cavitation bubbles, and transfer energy to the stone, crushing the stone into powder. Because water absorbs a lot of energy, it reduces damage to surrounding tissues. At the same time, the penetration depth of holmium laser into human tissue is very shallow, so the damage to surrounding tissues can be minimized during lithotripsy, and it is extremely safe.

[0004] However, in some intraoperative operations, laser lithotripsy requires inserting a stone removal basket and optical fiber into the insertion part of the endoscope, and the insertion action needs to be repeated twice, which is cumbersome. In addition, after the optical fiber passes through the instrument channel, the direction of the optical fiber is uncertain, and it is difficult for the doctor to judge the direction of the optical fiber, which affects the doctor's intraoperative operation and even affects the surgical results. Summary of the invention

[0005] The purpose of this application is to provide a stone removal device and a method of using the same to solve the above-mentioned technical problems existing in the prior art.

[0006] This application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a stone removal device, comprising an optical fiber, a basket structure and a limiting assembly, wherein the optical fiber is used to transmit laser light, the basket structure comprises a plurality of basket connecting wires arranged around the optical fiber, and the proximal ends of all the basket connecting wires are fixed to the optical fiber, and the distal ends of all the basket connecting wires are interconnected to form a basket body on the distal side of the optical fiber; the limiting assembly comprises a limiting structure and a control member, wherein the limiting structure is sleeved outside the optical fiber, the limiting structure is located on the proximal side of the basket body, the distal end of the control member is connected to the limiting structure, and the proximal end of the control member extends toward the proximal end of the optical fiber, and the control member is used to control the expansion or retraction of the limiting structure on the optical fiber to increase or decrease the diameter of the limiting structure.

[0008] In a second aspect, an embodiment of the present application provides a method for using a stone removal device. Using the stone removal device provided by the embodiment of the first aspect, the specific method of use includes: inserting the stone removal device into the instrument channel of the insertion portion of the endoscope, and pushing the stone removal device toward the distal end of the instrument channel so that the distal end of the basket structure and the distal end of the optical fiber are exposed in the instrument channel, so that the limiting assembly is located in the instrument channel; controlling the expansion of the limiting structure so that the limiting structure is pressed against the inner wall of the instrument channel to stabilize the position of the optical fiber and the instrument channel.

[0009] The technical solution adopted in this application can achieve the following beneficial effects:

[0010] In the present application, by fixing the basket structure and the optical fiber, the basket structure and the optical fiber form an integral structure. During the stone removal process, only one insertion action needs to be performed into the insertion part of the endoscope, which can simplify the process of stone removal operation; and the basket connecting wire is arranged around the optical fiber, which can improve the coaxiality of the basket structure and the optical fiber. During the stone removal operation, the probability of the optical fiber and the basket connecting wire touching each other is reduced, and the probability of the laser emitted by the optical fiber interrupting the basket connecting wire is also reduced. In addition, a limiting structure is also provided to be sleeved outside the optical fiber. By expanding the limiting structure, the diameter of the limiting structure is increased, so that the limiting structure can abut against the instrument channel of the insertion part, stabilize the position of the optical fiber in the instrument channel, reduce the probability of the optical fiber moving in the instrument channel, further improve the coaxiality of the optical fiber and the instrument channel, and make the direction of the optical fiber clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. 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 creative work.

[0012] Figure 1 is a schematic diagram of the overall structure of a stone removal device provided in some embodiments of the present application;

[0013] Figure 2 It is a partial structural schematic diagram of a stone removal device provided in some embodiments of the present application;

[0014] Figure 3 This application is about Figure 2 Detailed view of point A;

[0015] Figure 4 This is a schematic diagram of the use process of the limit assembly provided in some embodiments of the present application. Figure 1 ;

[0016] Figure 5This is a schematic diagram of the use process of the limit assembly provided in some embodiments of the present application. Figure 2 ;

[0017] Figure 6 This is a schematic diagram of the cooperation between the basket connecting wire and the optical fiber provided in some embodiments of the present application Figure 1 ;

[0018] Figure 7 This is a schematic diagram of the cooperation between the basket connecting wire and the optical fiber provided in some embodiments of the present application Figure 2 ;

[0019] Figure 8 This is a schematic diagram of the coordination between the stone removal device and the endoscope provided in some embodiments of the present application.

[0020] In the figure: 100-optical fiber, 110-core, 120-hard polymer cladding, 130-buffer layer, 200-basket structure, 210-basket connecting wire, 300-limiting assembly, 310-limiting structure, 311-control ring, 312-memory alloy wire, 313-fixing ring, 320-control part, 400-insertion part, 500-endoscope handle. DETAILED DESCRIPTION

[0021] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0022] In each embodiment of the present application, "proximal end" and "distal end" refer to the end of the endoscope and its accessories that are closer to the user in the use environment as the "proximal end" and the end that is farther from the user as the "distal end", where the "distal end" and "proximal end" also correspond to the front and back relationships respectively.

[0023] In the related art, since the holmium laser fiber is thin and its diameter is too different from that of the instrument tube of the endoscope insertion part, when the holmium laser fiber shuttles through the instrument tube, the fiber will touch the inner wall of the instrument tube multiple times, causing the fiber to bend in an uncertain direction inside the instrument tube, resulting in the fiber pointing in an uncertain direction after passing through the instrument channel.

[0024] The direction of the optical fiber is uncertain, and it is difficult for doctors to determine the direction of the optical fiber during the stone removal operation. For example, the optical fiber may point to the stone removal basket, causing the basket connection wire of the stone removal basket to be broken; or the optical fiber deviates from the stone and points to the inner wall of the tissue, causing damage to the inner wall of the tissue; or the optical fiber advances too far, causing the optical fiber and the stone to be squeezed and damaged, or the optical fiber pushes the stone to move, causing the stone to move to a position that is difficult to operate, or the optical fiber pushes the stone to squeeze the inner wall of the tissue, damaging the inner wall of the tissue.

[0025] In view of this, the present application embodiment provides a stone removal device, referring to Figures 1 to 7 As shown, the optical fiber 100 and the basket structure 200 are configured as an integral structure, and a limiting assembly 300 is used to limit the position of the optical fiber 100 in the instrument channel, thereby improving the coaxiality of the optical fiber 100, the basket structure 200 and the instrument channel.

[0026] The stone removal device provided in the embodiment of the present application includes three parts: an optical fiber 100, a basket structure 200, and a limit assembly 300. The optical fiber 100 is used to transmit laser, and a holmium laser is generally selected. The basket structure 200 includes a plurality of basket connecting wires 210. Figure 1 and Figure 2 As shown, multiple basket connecting wires 210 of the basket structure 200 are arranged around the optical fiber 100, and the proximal ends of all the basket connecting wires 210 are fixed to the optical fiber 100, and the distal ends of all the basket connecting wires 210 are connected to each other to form a basket body on the distal side of the optical fiber 100.

[0027] The distal end of the optical fiber 100 refers to the end of the optical fiber 100 away from the user during the stone removal process, and the proximal end of the optical fiber 100 refers to the end of the optical fiber 100 close to the user during the stone removal process. The proximal end and the distal end of the basket connecting wire 210 are similar.

[0028] The basket body is located at the distal end of the optical fiber 100 to block the stones at the distal end of the optical fiber 100. After the proximal end of the basket connecting wire 210 is fixed to the optical fiber 100, the distal end extends toward the distal end of the optical fiber 100, and after crossing the distal end of the optical fiber 100, they are connected to each other to form a basket body. The basket body encloses the distal end of the optical fiber 100 to block the stones that need to be treated by the optical fiber 100.

[0029] The basket body is generally prefabricated as a curved structure with the basket connecting wires 210 formed therein. All the basket connecting wires 210 are bent to form a storage space for accommodating stones in the middle of all the basket connecting wires 210. Figure 1 and Figure 2 As shown. In the absence of external force restrictions, the basket connecting wire 210 can be bent according to its pre-made bending angle. In the case of external force restrictions, the bending degree of the basket connecting wire 210 can be weakened, thereby reducing the overall size of the basket body, making it easier for the basket structure 200 to move in the endoscope. In some embodiments, the basket connecting wire 210 can be made of a memory metal material.

[0030] During the operation, the insertion part 400 of the endoscope is inserted into the human body, and the insertion part 400 is moved to the location of the stone. When the stone removal device is in use, the optical fiber 100 can be inserted into the instrument channel of the insertion part 400, and then the optical fiber 100 can be moved. Figure 8As shown, the distal ends of the optical fiber 100 and the basket structure 200 are exposed to the instrument channel to facilitate the control and manipulation of the stone.

[0031] When the basket body is in the instrument channel, the inner wall of the instrument channel is pressed against the basket connecting wire 210, and the instrument channel limits the bending angle of the basket connecting wire 210, reduces the overall size of the basket body, and ensures that the basket body can move smoothly in the instrument channel. After the distal end of the basket connecting wire 210 is exposed in the instrument channel, the instrument channel can no longer limit the basket connecting wire 210, and the basket connecting wire 210 can be bent according to its pre-fabricated angle, expanding the size of the basket body, and facilitating the blocking of stones. After the basket body is used, it can be moved back into the instrument channel.

[0032] The basket structure 200 is directly fixed to the optical fiber 100, so that the basket structure 200 and the optical fiber 100 form an integral structure. During the stone removal process, only one insertion action needs to be performed into the instrument channel to insert the basket structure 200 and the optical fiber 100 into the target position, which can simplify the process of the stone removal operation.

[0033] Moreover, in the prior art, the basket structure 200 located in the instrument channel together with the optical fiber 100 will also squeeze the optical fiber 100, further increasing the uncertainty of the extension direction of the optical fiber 100.

[0034] In the embodiment provided by the present application, a plurality of basket connecting wires 210 are arranged around the optical fiber 100, and the basket connecting wires 210 are fixed to the optical fiber 100 to stabilize the relative position between the basket structure 200 and the optical fiber 100, thereby improving the coaxiality of the basket structure 200 and the optical fiber 100, and even if the extension direction of the optical fiber 100 is offset, the optical fiber 100 and the basket structure 200 are synchronously offset. Since the relative position of the optical fiber 100 and the basket connecting wire 210 is stable, the probability of the optical fiber 100 contacting the basket connecting wire 210 can be reduced, and the probability of the laser emitted by the optical fiber 100 accidentally interrupting the basket connecting wire 210 can be reduced, thereby maintaining the integrity of the basket structure 200 as a whole to a certain extent.

[0035] The limiting assembly 300 includes a limiting structure 310 and a control member 320. Figure 1 As shown, the limiting structure 310 is sleeved outside the optical fiber 100, and the limiting structure 310 is located at the proximal side of the basket body. The distal end of the operating member 320 is connected to the limiting structure 310, and the proximal end of the operating member 320 is connected toward the proximal end of the optical fiber 100, and is arranged close to the operator, so that the operator can control the operating member 320. The operating member 320 is used to control the limiting structure 310 to expand or retract on the optical fiber 100, so as to increase or decrease the diameter of the limiting structure 310.

[0036] The control member 320 controls the expansion of the limiting structure 310, and the diameter of the limiting structure 310 increases. Figure 5 The operating member 320 controls the limiting structure 310 to retract, and the diameter of the limiting structure 310 decreases. Figure 4 shown.

[0037] During the stone removal process, the optical fiber 100 is inserted into the instrument channel. After the diameter of the limiting structure 310 increases, the limiting structure 310 can abut against the inner wall of the instrument channel, thereby fixing the position of the optical fiber 100 in the instrument channel and preventing the optical fiber 100 from moving randomly in the instrument channel, thereby improving the coaxiality of the optical fiber 100 and the instrument channel, clarifying the direction of the optical fiber 100, and being more conducive to the doctor's intraoperative operation. After the diameter of the limiting structure 310 decreases, the fixation of the optical fiber 100 and the instrument channel is released, and the optical fiber 100 can be moved in the instrument channel.

[0038] The limiting structure 310 can assist the optical fiber 100 in being fixed in the instrument channel, correct the axial direction of the optical fiber 100, and make the optical fiber 100 as coaxial as possible with the instrument channel. The fixed fit between the limiting structure 310 and the instrument channel is relative. When the optical fiber 100 is subjected to a strong force, the optical fiber 100 can still move in the instrument channel. In addition, the limiting structure 310 fixes the optical fiber 100 in the instrument channel, which can provide a positioning point for the optical fiber 100; the basket connecting wire 210 located at the distal end of the optical fiber 100 is bent and tightly matched with the inner wall of the tissue, which can also provide a positioning point for the optical fiber 100 and fix the optical fiber 100 relative to the inner wall of the tissue. The optical fiber 100 has two positioning points, which can further improve the coaxiality of the optical fiber 100 and the instrument channel, and improve the position stability of the distal end of the optical fiber 100. When the doctor operates during the operation, he can more accurately judge the axial direction of the optical fiber 100 to move the optical fiber 100 to the preset target position.

[0039] The limiting structure 310 expands when it is necessary to fix the optical fiber 100, and retracts when it is necessary to move the optical fiber 100. The limiting structure 310 has various implementations.

[0040] In some embodiments of the present application, reference Figures 2 to 5As shown, the limiting structure 310 includes a control ring 311 and a plurality of memory alloy wires 312. The control ring 311 is movably sleeved outside the optical fiber 100, and the operating member 320 is connected to the control ring 311, and is used to operate the control ring 311 to move along the axial direction of the optical fiber 100. The plurality of memory alloy wires 312 are arranged around the optical fiber 100, one end of the memory alloy wire 312 is fixed to the optical fiber 100, and the other end is fixed to the control ring 311, and the initial state of the memory alloy wire 312 is a bent state or a straight state. The operating member 320 can drive the control ring 311 to move under the action of an external force, thereby straightening the memory alloy wire 312 in a bent state, or driving the memory alloy wire 312 in a straight state to bend.

[0041] The memory alloy wire 312 in a bent state bulges toward the inner wall of the instrument channel where the optical fiber 100 is located and abuts against the inner wall of the instrument channel. Multiple memory alloy wires 312 are bent together and abut against the inner wall of the instrument channel at the same time, increasing the maximum diameter of the limiting structure 310 and completing the abutment and fixation between the limiting structure 310 and the instrument channel.

[0042] A plurality of memory alloy wires 312 are arranged around the optical fiber 100. When the memory alloy wires 312 abut against the inner wall of the instrument channel, the optical fiber 100 is restricted to the middle of the instrument channel as much as possible, thereby further improving the coaxiality of the optical fiber 100 and the instrument channel.

[0043] The initial state of the memory alloy wire 312 refers to the state that the memory alloy wire 312 will recover when no external force is applied. In actual operation, only one-way operation is required.

[0044] Exemplarily, when the initial state of the memory alloy wire 312 is a straight state, it is necessary to control the control ring 311 to move toward the other end of the memory alloy wire 312, so as to cause the memory alloy wire 312 to bend, so as to achieve the purpose of expanding the limiting structure 310. At this time, the limiting structure 310 can fix the optical fiber 100 inside the instrument channel. When it is not necessary to fix the optical fiber 100, directly release the control of the control member 320, release the force on the control ring 311, and the control ring 311 will no longer drive the memory alloy wire 312 to bend. The memory alloy wire 312 will restore the straight state under the action of its own properties. At this time, the connection between the limiting structure 310 and the instrument channel can be released, and the optical fiber 100 can be freely moved in the instrument channel. By controlling the unidirectional movement of the control ring 311 and cooperating with the properties of the memory alloy wire 312 itself, the expansion and retraction of the limiting structure 310 can be realized, and the operation steps of the limiting structure 310 can be simplified.

[0045] Exemplarily, when the initial state of the memory alloy wire 312 is a bent state, it is necessary to control the control ring 311 to move in a direction away from the other end of the memory alloy wire 312, so as to straighten the memory alloy wire 312 in the bent state. In the embodiment of the present application, the control ring 311 is pulled, the distance between the control ring 311 and the other end of the memory alloy wire 312 increases, and the bending degree of the memory alloy wire 312 gradually weakens until the memory alloy wire 312 is completely straightened. The memory alloy wire 312 with weakened bending degree can release the contact with the inner wall of the instrument channel. The higher the weakening degree, the smaller the diameter of the limiting structure 310, and the easier it is to move the optical fiber 100. When the limiting structure 310 needs to be expanded, it is only necessary to release the control of the control ring 311, and the memory alloy wire 312 can be restored to the bent state under its own properties, and the limiting structure 310 is expanded.

[0046] In some preferred embodiments of the present application, reference is made to Figure 4 and Figure 5 As shown, the control ring 311 is arranged at the proximal end of the memory alloy wire 312, the proximal end of the memory alloy wire 312 is directly fixed to the control ring 311, and the distal end of the memory alloy wire 312 is fixed to the optical fiber 100. The initial state of the memory alloy wire 312 is a bent state. When the operating member 320 is not operated, the memory alloy wire 312 abuts against the inner wall of the instrument channel to fix the position of the optical fiber 100. When the optical fiber 100 needs to be moved, the operating member 320 needs to be operated to move, thereby pulling the control ring 311 toward the proximal end to straighten the memory alloy wire 312 in the bent state.

[0047] When the optical fiber 100 needs to be moved, it is generally not necessary to use the optical fiber 100 to emit laser. At this time, the operator controls the moving position of the optical fiber 100 at the endoscope handle 500. In the above preferred embodiment, it is also necessary to stabilize the position of the operating member 320 so that the memory alloy wire 312 is straightened before the optical fiber 100 can be moved. The proximal end of the operating member 320 is also located at the endoscope handle 500. The operator can control the operating member 320 while operating the optical fiber 100. When the optical fiber 100 is fixed, it is necessary to use the optical fiber 100 to emit laser. At this time, the operator's attention is on the distal end of the optical fiber 100, and the control force on the proximal end of the optical fiber 100 will be weakened. In the above preferred embodiment, there is no need to control the operating member 320. The initial state of the memory alloy wire 312 is a bent state. The memory alloy wire 312 can directly abut the inner wall of the instrument tube to stabilize the position of the optical fiber 100. When the operator controls the optical fiber 100 to emit laser, there is no need to be distracted by the state of the memory alloy wire 312, which is more conducive to the operator to treat the stone.

[0048] In some preferred embodiments of the present application, the limiting structure 310 also includes a fixing ring 313, which is fixedly sleeved outside the optical fiber 100, and the memory alloy wire 312 is fixed to the optical fiber 100 through the fixing ring 313. The fixing ring 313 can improve the fixing stability between the memory alloy wire 312 and the optical fiber 100. The outermost surface of the optical fiber 100 is generally a buffer layer 130, which has a certain elasticity. The memory alloy wire 312 is directly fixed to the outer surface of the optical fiber 100, which is more difficult and has a poor fixing effect. Through the connection of the fixing ring 313, the fixing ring 313 is first fixed to the optical fiber 100, and the annular structure is more convenient for fixing to the optical fiber 100. In addition, the limiting assembly 300 as a whole can be prefabricated in advance, and the prefabricated limiting structure 310 can be directly installed outside the optical fiber 100 to improve the overall assembly efficiency of the stone removal device.

[0049] In addition, by providing a fixing ring 313 and a control ring 311, the memory alloy wire 312 can be fixed between the two ring structures at the same time, so that the distances between the two ends of the memory alloy wire 312 and the axis of the optical fiber 100 can be equal. When the memory alloy wire 312 is in a straight state, the memory alloy wire 312 is parallel to the optical fiber 100. When the control member 320 controls the control ring 311 to move, the two ends of the memory alloy wire 312, which is in a straight state in the initial state, are subjected to forces on the same straight line, and the memory alloy wire 312 is more likely to bend, which can reduce the control difficulty of the control member 320.

[0050] Further preferably, the plurality of memory alloy wires 312 are evenly distributed along the circumference of the optical fiber 100. The expansion size of each memory alloy wire 312 relative to the diameter of the limiting structure 310 is substantially consistent, so that the optical fiber 100 is fixed at the exact center of the instrument channel as much as possible, further improving the coaxiality between the optical fiber 100 and the instrument channel.

[0051] The multiple memory alloy wires 312 of the limiting structure 310 should be rotationally symmetrical around the axis of the optical fiber 100. After the shape of the memory alloy wire 312 changes, the change trend of each memory alloy wire 312 can be as consistent as possible, so that the size change of the limiting structure 310 in the circumferential direction of the optical fiber 100 is as consistent as possible, so that the optical fiber 100 and the instrument channel are arranged as coaxially as possible.

[0052] In other embodiments of the present application, the limiting structure 310 can directly select the airbag structure, the control member 320 can select the gas pipeline structure, and the control member 320 is connected with the limiting structure 310. When the limiting structure 310 needs to expand, the control member 320 supplies gas to the limiting structure 310, so that the limiting structure 310 expands to increase its diameter. When the limiting structure 310 needs to retract, the control member 320 deflates the limiting structure 310, so that the limiting structure 310 shrinks to reduce its diameter.

[0053] In some embodiments, after the airbag structure is expanded, the entirety of the airbag structure contacts the inner wall of the instrument channel. Due to the limitation of the instrument channel, the contact area between the limiting structure 310 and the instrument channel will gradually increase, thereby improving the connection stability between the limiting structure 310 and the instrument channel.

[0054] The limiting structure 310 is sleeved outside the optical fiber 100 to correct the position of the optical fiber 100 in the instrument channel, which can reduce the deformation of the optical fiber 100, thereby improving the coaxiality of the optical fiber 100 and the instrument channel. In some preferred embodiments of the present application, the limiting structure 310 is preferably arranged close to the distal end of the optical fiber 100. Because the distal end of the optical fiber 100 is in contact with the stone, improving the stability of the distal position of the optical fiber 100 can make the optical fiber 100 and the instrument channel have better coaxiality. According to different models of endoscopes, the required moving distance of the optical fiber 100 is different, and the distance between the limiting structure 310 and the distal end face of the optical fiber 100 is also different. Preferably, when the length of the optical fiber 100 exposed in the instrument channel is at the maximum, the limiting structure 310 is located at the distal outlet of the instrument channel, and abuts and cooperates with the inner wall at the distal outlet of the instrument channel. In addition, after the optical fiber 100 is exposed in the instrument channel, the optical fiber 100 can be positioned by the contact between the basket structure 200 and the inner wall of the tissue, thereby correcting the offset of the axis of the optical fiber 100 relative to the axis of the instrument channel caused by the structure of the optical fiber 100 itself.

[0055] refer to Figure 3 and Figure 6 As shown, the optical fiber 100 includes a core 110, a hard polymer cladding 120 and a buffer layer 130. The hard polymer cladding 120 is coated on the core 110, and the buffer layer 130 is coated on the hard polymer cladding 120. In some embodiments of the present application, reference Figure 6 As shown, the proximal end of the basket connecting wire 210 is fixed inside the buffer layer 130. With such a layout, the overall size of the stone removal device can be reduced, and the basket connecting wire 210 can enhance the structural strength of the buffer layer 130, reduce the deformation probability of the portion of the optical fiber 100 with the basket connecting wire 210, so that the optical fiber 100 can be kept in a straight state as much as possible, and improve the coaxiality of the optical fiber 100 and the instrument channel.

[0056] In some other embodiments of the present application, the optical fiber 100 includes a core 110 and a hard polymer cladding 120, wherein the hard polymer cladding 120 is coated on the core 110. Figure 7As shown, a plurality of basket connecting wires 210 are arranged spirally around the optical fiber 100 and fixedly wrapped with the hard polymer cladding 120. The basket connecting wires 210 replace the buffer layer 130 to protect the core 110. The basket connecting wires 210 spirally around the optical fiber 100 need to be fixed to the hard polymer cladding 120 to stabilize the position of the basket connecting wires 210 and prevent the position of the basket connecting wires 210 coated outside the optical fiber 100 from moving, resulting in a situation where part of the core 110 is exposed to the outside.

[0057] The present application also provides a method for using a stone removal device. The stone removal device provided by any of the above embodiments is used, and the specific method includes:

[0058] The stone removal device is inserted into the instrument channel of the endoscope insertion part 400, and the stone removal device is pushed toward the distal end of the instrument channel, so that the distal end of the basket structure 200 and the distal end of the optical fiber 100 are exposed in the instrument channel, so that the limiting assembly 300 is located in the instrument channel. The distal end of the basket structure 200 is a basket body formed by connecting multiple basket connecting wires 210 to each other, which is used to prevent the movement of stones.

[0059] After the distal end of the optical fiber 100 is moved into position, the control member 320 needs to be operated to control the expansion of the limiting structure 310 so that the limiting structure 310 is pressed against the inner wall of the instrument channel, thereby stabilizing the position of the optical fiber 100 and the instrument channel, improving the coaxiality of the optical fiber 100 and the instrument channel, and making it easier for doctors to handle stones.

[0060] The endoscope provided in the embodiment of the present application can be a pyeloscope, or it can be a bronchoscope, a suction endoscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stone removal device, characterized in that: include: An optical fiber (100), wherein the optical fiber (100) is used to transmit laser light, A basket structure (200), the basket structure (200) comprising a plurality of basket connecting wires (210) arranged around the optical fiber (100), the proximal ends of all the basket connecting wires (210) being fixed to the optical fiber (100), and the distal ends of all the basket connecting wires (210) being connected to each other to form a basket body on the distal end side of the optical fiber (100); A limiting assembly (300), the limiting assembly (300) comprising a limiting structure (310) and an operating member (320), the limiting structure (310) being sleeved outside the optical fiber (100), the limiting structure (310) being located on the proximal side of the basket body, the distal end of the operating member (320) being connected to the limiting structure (310), the proximal end of the operating member (320) extending toward the proximal end of the optical fiber (100), the operating member (320) being used to control the limiting structure (310) to expand or retract on the optical fiber (100) so as to increase or decrease the diameter of the limiting structure (310).

2. A stone removal device according to claim 1, characterized in that: The limiting structure (310) comprises a control ring (311) and a plurality of memory alloy wires (312); the control ring (311) is movably sleeved outside the optical fiber (100); the operating member (320) is connected to the control ring (311); the plurality of memory alloy wires (312) are arranged around the optical fiber (100); one end of the memory alloy wire (312) is fixed to the optical fiber (100) and the other end is fixed to the control ring (311); the initial state of the memory alloy wire (312) is a bent state or a straight state; The control member (320) can drive the control ring (311) to move under the action of an external force, thereby straightening the memory alloy wire (312) in a bent state, or driving the memory alloy wire (312) in a straight state to bend.

3. A stone removal device according to claim 2, characterized in that: The control ring (311) is located at the proximal end of the memory alloy wire (312); the proximal end of the memory alloy wire (312) is fixed to the control ring (311); the distal end of the memory alloy wire (312) is fixed to the optical fiber (100); and the initial state of the memory alloy wire (312) is a bent state.

4. A stone removal device according to claim 2, characterized in that: The limiting structure (310) further comprises a fixing ring (313), wherein the fixing ring (313) is fixedly sleeved outside the optical fiber (100), and the memory alloy wire (312) is fixed to the optical fiber (100) via the fixing ring (313).

5. The stone removal device according to claim 2, characterized in that: The plurality of memory alloy wires (312) are evenly distributed along the circumference of the optical fiber (100).

6. The stone removal device according to claim 1, characterized in that: The limiting structure (310) is an air bag structure, the operating member (320) is an air delivery pipeline structure, and the operating member (320) is in communication with the limiting structure (310).

7. The stone removal device according to claim 1, characterized in that: The limiting structure (310) is arranged close to the far end of the optical fiber (100).

8. The stone removal device according to claim 1, characterized in that: The optical fiber (100) comprises a core (110), a hard polymer cladding (120) and a buffer layer (130); the hard polymer cladding (120) is coated on the core (110), and the buffer layer (130) is coated on the hard polymer cladding (120); the proximal end of the basket connecting wire (210) is fixed inside the buffer layer (130).

9. The stone removal device according to claim 1, characterized in that: The optical fiber (100) comprises a core (110) and a hard polymer cladding (120), wherein the hard polymer cladding (120) is coated on the core (110), and a plurality of the basket connecting wires (210) are arranged spirally around the optical fiber (100) and fixedly wrap the hard polymer cladding (120).

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