Crushing appliance and accessory for a crushing appliance

Abstract

The crushing device comprises: a sheath; a front end member mounted on the front end of the sheath; and a basket line protruding from the front end of the front end member, the front end member having a line guide portion for guiding the basket line, the line guide portion being radially disposed at a position further outward than the front end face of the front end member.

Description

Technical Field

[0001] This disclosure relates to crushing tools and accessories for crushing tools. Background Technology

[0002] As a lithotripsy tool used to crush stones formed in the bile ducts, etc., basket pliers (basket grippers, basket-type grippers) are used. The basket pliers are formed into a basket shape from wire components. The user places the stone into the basket pliers, closes the pliers to secure the stone, and thus crushes it. Crushing stones with basket pliers is simple and inexpensive. On the other hand, the crushing force of basket pliers is sometimes insufficient, and sometimes it fails to crush the stone.

[0003] To properly crush stones, basket clamps with improved crushing force have been designed. For example, basket clamps that use crushing components other than wire members to crush stones are described in Patent Documents 1 and 2.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: US Patent No. 5,176,688

[0007] Patent Document 2: US Patent No. 9,168,099 Summary of the Invention

[0008] The problem the invention aims to solve

[0009] However, conventional basket clamps described in Patent Documents 1 and 2 sometimes fail to crush stones depending on their location. For example, when a stone is removed from a position off the central axis of the basket clamp, it is difficult to apply a uniform crushing force to the stone, thus making it difficult to crush the stone.

[0010] In view of the above, the purpose of this disclosure is to provide a crushing device and accessories for crushing devices that can properly crush stones regardless of the location of the stones being taken.

[0011] Solution for solving the problem

[0012] To address the aforementioned issues, this disclosure proposes the following solutions.

[0013] The crushing device of the first technical solution disclosed herein comprises: a sheath; a front end member mounted on the front end of the sheath; and a basket line protruding from the front end of the front end member, the front end member having a line guide portion for guiding the basket line, the line guide portion being radially disposed at a position further outward than the front end face of the front end member.

[0014] The second technical solution of this disclosure provides a crusher accessory having a guide cavity through which a wire basket passes, the guide cavity having an inclined surface that slopes radially outward as it moves from the base end toward the front end.

[0015] The third technical solution of this disclosure includes a crushing device comprising: a sheath; a front end member mounted on the front end of the sheath; and a basket formed by a basket line protruding from the front end of the front end member, wherein when the basket line is further pulled toward the base end of the sheath while the stone has been captured by the basket, the front end of the front end member is pressed against the stone.

[0016] The effects of the invention

[0017] According to the crushing apparatus and accessories disclosed herein, stones can be properly crushed regardless of their location. Attached Figure Description

[0018] Figure 1 This is an overall diagram of the endoscopic treatment system according to the first embodiment.

[0019] Figure 2 This is an overall diagram showing the breaking device of the aforementioned endoscopic treatment system.

[0020] Figure 3 This is a perspective view of the front end of the aforementioned crushing device.

[0021] Figure 4 This is a cross-sectional view of the aforementioned front end portion of the aforementioned crushing device.

[0022] Figure 5 This is a diagram showing the bile ducts that are the objects of treatment.

[0023] Figure 6 This is a diagram representing the take-in process.

[0024] Figure 7 This is a cross-sectional view of the front end of the aforementioned crushing device in the crushing process.

[0025] Figure 8 This is a cross-sectional view of the front end of the crushing device in the above-mentioned crushing process.

[0026] Figure 9 This is a cross-sectional view of the front end of the crushing device in the above-mentioned crushing process.

[0027] Figure 10 This is a diagram showing a conventional front end member (comparative example) that does not have a tapered section.

[0028] Figure 11 This is a perspective view of the front end of a modified example of the aforementioned crushing device.

[0029] Figure 12 This is a perspective view of the front end of the crushing device according to the second embodiment.

[0030] Figure 13 This is a cross-sectional view of the aforementioned front end portion of the aforementioned crushing device.

[0031] Figure 14 This is a front view of the front end of the aforementioned crusher when viewed from the front side.

[0032] Figure 15 This is a front view of a modified example of the front end of the aforementioned crushing device.

[0033] Figure 16 This is a perspective view of the front end of the crushing device according to the third embodiment.

[0034] Figure 17 This is a cross-sectional view of the aforementioned front end portion of the aforementioned crushing device.

[0035] Figure 18 This is a perspective view of the front end of a modified example of the aforementioned crushing device.

[0036] Figure 19 This is a sectional view of the front end of the above-described modified example.

[0037] Figure 20 This is a perspective view of the front end of the crushing device according to the third embodiment.

[0038] Figure 21 This is a cross-sectional view of the front end of the aforementioned crushing device.

[0039] Figure 22 This is a perspective view of the accessories according to the fifth embodiment.

[0040] Figure 23 This is a cross-sectional view of the aforementioned accessories.

[0041] Figure 24 It is a 3D diagram of a traditional crushing tool.

[0042] Figure 25 This is a perspective view of the aforementioned accessories installed on conventional crushing equipment. Detailed Implementation

[0043] (First Implementation)

[0044] Reference Figures 1 to 10 An endoscopic treatment system 300 having the crushing device 100 of the first embodiment of the present invention will be described.

[0045] [Endoscopic handling system 300]

[0046] Figure 1 This is an overall diagram of the endoscopic treatment system 300.

[0047] like Figure 1 As shown, the endoscopic treatment system 300 includes a shredder 100 and an endoscope 200. The shredder 100 is inserted into the endoscope 200 for use.

[0048] [Endoscope 200]

[0049] Endoscope 200 is a known side-viewing flexible endoscope, having a longitudinally elongated insertion portion 210 and an operating portion 220 provided at the base of the insertion portion 210. Alternatively, endoscope 200 may also be a direct-viewing flexible endoscope.

[0050] The insertion portion 210 includes: a front rigid portion 211 disposed at the front end; a bending portion 212 disposed at the base end side of the front rigid portion 211, capable of bending; and a flexible tube portion 213 disposed at the base end side of the bending portion 212. A light guide 215 and a camera unit 216 with a CCD are disposed on the side of the front rigid portion 211 in an exposed state.

[0051] A treatment device channel 230 is formed in the insertion portion 210 for the crushing device 100 to pass through. The front end portion 230a of the treatment device channel 230 opens on the side of the front hard portion 211. The base end portion of the treatment device channel 230 extends to the operation portion 220.

[0052] A lifting platform 214 is provided at the front end of the rigid part 211 of the treatment device channel 230 (see reference). Figure 6 The base end of the lifting platform 214 is rotatably supported on the front rigid part 211. A lifting platform operation line (not shown) fixed to the front end of the lifting platform 214 extends toward the base end side through the insertion part 210.

[0053] The bending portion 212 is configured to be flexible in both vertical and horizontal directions. The front end of the operation line is fixed to the front end of the bending portion 212. The operation line passes through the insertion portion 210 and extends to the operation portion 220.

[0054] A knob 223 for operating the operation line and a switch 224 for operating the camera unit 216 are provided on the base side of the operation section 220. By operating the knob 223, the user can bend the bending section 212 in the desired direction.

[0055] A clamping jaw 222 communicating with the treatment device channel 230 is provided at the front end of the operating section 220. The user can insert the crushing device 100 through the clamping jaw 222. A clamping bolt 225 is installed in the clamping jaw 222 to prevent leakage of bodily fluids.

[0056] [100 crushing tools]

[0057] Figure 2 This is an overall drawing representing the crushing device 100.

[0058] The crushing device 100 (also known as the endoscopic treatment device 100) has a sheath 1 and an operating line 2 (see reference). Figure 4 ), front end component 3, basket 4, and operating part 5. In the following description, along the length direction A of the crushing device 100, the side that is inserted into the patient's body is referred to as "front end side (distal side) A1", and the side of operating part 5 is referred to as "base side (proximal side) A2".

[0059] Figure 3 This is a perspective view of the front end of the crusher 100.

[0060] The sheath 1 is a flexible, longitudinally elongated member extending from the front end 1a to the base end 1b. The sheath 1 has an outer diameter capable of being inserted into the instrument channel 230 of the endoscope 200. Figure 1 As shown, with the sheath 1 inserted into the treatment device channel 230, the front end 1a of the sheath 1 can protrude and sink into the front opening 230a of the treatment device channel 230. An operating line 2 passes through the internal space (cavity) 1s of the sheath 1.

[0061] The operating line 2 is a metal wire component that penetrates the internal space 1s of the sheath 1. The front end of the operating line 2 is connected to the basket 4, and the base end of the operating line 2 is connected to the operating part 5.

[0062] Figure 4 This is a cross-sectional view of the front end of the crushing device 100.

[0063] The front end member 3 is installed at the front end 1a of the sheath 1. The front end member 3 is made of a metal such as stainless steel. The central axis O3 of the front end member 3 in the length direction A is consistent with the central axis O1 of the sheath 1 in the length direction A. The front end member 3 has a main body 31, a tapered portion 32, and a wire guide portion 34.

[0064] The main body 31 is formed into a cylindrical shape and is installed at the front end 1a of the sheath. The internal space 3s of the main body 31 is connected to the internal space 1s of the sheath 1.

[0065] The conical portion 32 is cone-shaped, and its radial length R decreases from the base end side A2 toward the front end side A1. A flat front end face 33 is formed at the front end of the conical portion 32. The front end face 33 is a plane perpendicular to the longitudinal direction A of the crusher 100. Four line guide portions 34 are formed in the conical portion 32 along the circumferential direction C relative to the longitudinal direction A. Furthermore, the front end face 33 does not necessarily need to be a plane perpendicular to the longitudinal direction A of the crusher 100; for example, it can also be a curved surface convex toward the front end side A1.

[0066] The line guide portion 34 is a groove extending along the length direction A on the outer periphery of the tapered portion 32. Four line guide portions 34 are arranged at different positions on the circumferential direction C of the tapered portion 32. The four line guide portions 34 are arranged radially outward relative to the central axis O3. The four line guide portions 34 are separated by a wall 35, which is provided radially inward on the inner side of the front end member 3.

[0067] The line guide 34 has a first line guide 341, a second line guide 342, a third line guide 343, and a fourth line guide 344. The first line guide 341, the second line guide 342, the third line guide 343, and the fourth line guide 344 are arranged at equal intervals along the circumferential direction C.

[0068] The first wire guide 341 and the third wire guide 343 are arranged on both sides of the central axis O3. The second wire guide 342 and the fourth wire guide 344 are arranged on both sides of the central axis O3.

[0069] The front end 34a of the wire guide portion 34 is located on the side 32s of the tapered portion 32. Therefore, the wire guide portion 34 does not extend to the front end face 33. In other words, the front end face 33 is located on the front end head 42 side (far side A1) of the wire guide portion 34.

[0070] The base end 34b of the wire guide portion 34 extends to the main body 31. An opening (wire penetration portion, guide cavity) 36 is formed between the main body 31 and the wire guide portion 34, communicating with the internal space 3s of the main body 31. The front end face 33 is located on the front end head 42 side (distal side A1) of the opening 36.

[0071] Preferably, the length L1 of the front end face 33 of the front end member 3 in the radial direction R is smaller than the inner diameter L2 of the front end of the main body 31. Moreover, preferably, the maximum distance L3 from the opening 36 to the front end face 33 is larger than the inner diameter L2 of the main body 31.

[0072] The basket 4 is formed into a basket shape by four basket lines 41. The front ends of the four basket lines 41 are attached to a front end head 42. The base ends of the four basket lines 41 are attached to a binding part 43 provided at the front end of the operating line 2. The basket lines 41 are made of single or stranded wires formed using a material with high elasticity. For example, nickel-titanium alloy, stainless steel, or stainless steel alloy can be used as the material for the basket lines 41.

[0073] The basket line 41 protrudes from the interior space 3s of the main body 31 toward the front end A1 through the opening 36. The direction of movement of the basket line 41 protruding from the opening 36 toward the front end A1 is guided by the line guide 34.

[0074] like Figure 4As shown, the net basket line 41 has multiple bends 41c between the front end 42 and the binding part 43. However, each net basket line 41 does not necessarily need to have multiple bends 41c; it can bend gently from the front end 42 to the binding part 43. The net basket 4 is configured such that the multiple net basket lines 41 bulge out in a cage-like shape in their natural state.

[0075] The basket line 41 has a first basket line 411, a second basket line 412, a third basket line 413, and a fourth basket line 414. The first basket line 411, the second basket line 412, the third basket line 413, and the fourth basket line 414 are arranged at equal intervals along the circumferential direction C.

[0076] The first basket line 411 and the third basket line 413 are positioned on either side of the central axis O3. The second basket line 412 and the fourth basket line 414 are positioned on either side of the central axis O3.

[0077] The first net basket line 411 is guided by the first line guide 341. The second net basket line 412 is guided by the second line guide 342. The third net basket line 413 is guided by the third line guide 343. The fourth net basket line 414 is guided by the fourth line guide 344.

[0078] Furthermore, the number of net basket strings 41 is not limited to four; for example, it can be three, five, or six. The number of string guides 34 varies depending on the number of net basket strings 41.

[0079] The operating part 5 is located on the base end side A2 of the sheath 1. The operating part 5 includes an operating part body 51, a sliding member 53, and a guide wire port 54.

[0080] The front end of the main body 51 of the operating part is connected to the base end 1b of the sheath 1. The operating line 2 extends from the base end 1b of the sheath 1. The operating line 2 is fixed to the sliding member 53.

[0081] A liquid supply port 52 is provided on the main body 51 of the operating unit. The liquid supply port 52 is connected to the base end of the sheath 1 via a pipe formed in the main body 51 of the operating unit. Liquid supplied from the liquid supply port 52 passes through the sheath 1 and is released from the front end member 3.

[0082] The slider 53 is mounted on the operating unit body 51 in a manner that allows it to move along the length direction A relative to the operating unit body 51. The base end of the operating line 2 is fixed to the slider 53. The operating line 2 moves forward and backward by the user moving the slider 53 relative to the operating unit body 51.

[0083] The guide wire port 54 is an opening that allows the guide wire to be inserted.

[0084] [Operation of the Endoscopic Handling System 300]

[0085] Next, the operation of the endoscopic treatment system 300 of this embodiment will be described. Specifically, the method for breaking up the stone S formed in the bile duct B will be described. Figure 5 This is a diagram showing bile duct B, which is the object of treatment.

[0086] <Step S1: Endoscope Insertion Procedure>

[0087] The surgeon inserts the insertion portion 210 of the endoscope 200 into the patient's lumen through a natural opening such as the mouth. The surgeon manipulates the manipulation portion 220 as needed to bend the bending portion 212. The surgeon inserts the rigid tip 211 of the endoscope 200 into the duodenum (DU). The surgeon positions the rigid tip 211 at the opening PA1 of the papilla PA for frontal capture.

[0088] <Step S2: Insertion Process>

[0089] The surgeon inserts the shredder 100 into the bile duct B through the opening PA1 of the papilla PA. Specifically, the shredder 100 is inserted into the instrument channel 230 of the endoscope 200, with the basket 4 of the shredder 100 protruding from the anterior end 230a. While keeping the basket 4 closed, the basket 4 of the shredder 100 is inserted into the bile duct B through the opening PA. Alternatively, the surgeon may leave a guide suture in the bile duct B and insert the basket 4 of the shredder 100 along the guide suture into the bile duct B.

[0090] <Step S3: Input Process>

[0091] Figure 6 This is a diagram representing the take-in process.

[0092] The surgeon opens the basket 4 and removes the stone S into it. Specifically, the stone S is removed from between the basket lines 41 and captured in the basket 4. At this point, with the stone S separated from the front face 33, the basket 4 holds the stone S with a force that does not crush it.

[0093] <Step S4: Crushing Process>

[0094] Figures 7 to 9 This is a sectional view of the front end of the crushing device 100 in the crushing process.

[0095] like Figure 7 As shown, assume that the stone S is removed at a position offset from the central axis O3 and closer to the third basket line 413 than the central axis O3. Figure 8As shown, the surgeon operates the slider 53 of the operating part 5 to retract the operating line 2, pulling the basket 4 closer to the base side A2. Because the line guide 34 guides the pulled basket lines 41, the four basket lines 41 are easily pulled in the same direction, D. As a result, as the four basket lines 41 are pulled in, the stone S moves closer to the central axis O3.

[0096] The four guide sections 34 are separated by a wall 35 located inside the radial direction R of the front end member 3. The wall 35 restricts the basket line 41 from moving across the central axis O3 to the opposite side in the radial direction R. As a result, the stone S is prevented from moving away from the central axis O3 as the four basket lines 41 are pulled in.

[0097] like Figure 9 As shown, the surgeon, having captured the stone S using the basket 4, further pulls the basket line 41 towards the basal side A2. Because the stone S is close to the central axis O3, it is firmly pressed against the front end face 33 of the front end member 3. Therefore, the stone S is less likely to shift from the front end face 33. Thus, the surgeon can use the basket line 41 on the front end side A1 and the front end face 33 on the basal side A2 to clamp the stone S and break it with relatively little force.

[0098] Figure 10 This is a diagram showing a conventional front end member P (comparative example) that does not have the tapered portion 32.

[0099] The conventional front-end member P is a cylindrical shape without the tapered portion 32 and the line guide portion 34 (wall 35). Therefore, when the basket 4 is pulled closer to the base end side A2, the direction D in which the four basket lines 41 are pulled in is not easily aligned. Furthermore, the conventional front-end member P lacks the wall 35. Therefore, it is impossible to restrict the basket lines 41 from moving radially to the opposite side across the central axis O3. Figure 10 In the middle, the first basket line 411 crosses the central axis O3 and moves to the opposite side in the radial direction R.

[0100] According to the crushing device 100 of this embodiment, the stones S can be properly crushed regardless of their position in the basket 4.

[0101] The first embodiment of the present invention has been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to this embodiment, and design changes that do not depart from the spirit of the present invention are also included. Furthermore, the constituent elements shown in the above-described embodiments and variations can be appropriately combined to form a configuration.

[0102] (Variation Example 1)

[0103] Figure 11This is a perspective view of the front end of a modified example of a crusher 100A.

[0104] Compared to the crusher 100, the crusher 100A includes a front-end member 3A, which is a modified example of the front-end member 3. An opening 33h is formed on the front-end surface 33 of the front-end member 3A. The opening 33h communicates with the internal space 3s of the main body 31. The opening is located radially R inward of the front end 34a of the line guide portion 34. Furthermore, the opening 33h does not necessarily need to communicate with the internal space 3s of the main body 31; it can also be a bottomed hole extending from the front-end surface 33 toward the opening 36.

[0105] (Second Implementation)

[0106] Reference Figures 12 to 14 The crushing device 100B according to the second embodiment of the present invention will be described. In the following description, the same reference numerals are used for structures that are common to those already described, and repeated descriptions are omitted.

[0107] Figure 12 This is a perspective view of the front end of the crusher 100B.

[0108] The crusher 100B, like the crusher 100 of the first embodiment, is used together with the endoscope 200 as an endoscope treatment system. The crusher 100B has a sheath 1, an operating line 2, a front end member 3B, a basket 4, and an operating section 5.

[0109] Figure 13 This is a cross-sectional view of the front end of the crusher 100B.

[0110] The front end member 3B is mounted on the front end 1a of the sheath 1. The front end member 3B is made of a metal such as stainless steel. The central axis O3 of the front end member 3B in the length direction A is consistent with the central axis O1 of the sheath 1 in the length direction A. The front end member 3B has a main body 31, a front end portion 32B, and four line guide portions 34.

[0111] Figure 14 This is a front view of the front end of the crusher 100B as seen from the front side A1.

[0112] The front end portion 32B has four protrusions 37. The line guide portion 34 and the protrusions 37 are arranged alternately along the circumferential direction C. A curved or flat front end surface 33B is formed at the front end of the four protrusions 37. A slit 38 is formed on the front end surface 33B.

[0113] The slit 38 extends radially R through the central axis O3 of the front end member 3. The slit 38 is connected to the front end of the line guide 34. Furthermore, as... Figure 15As shown, when viewed from the front end side A1 in the longitudinal direction A, the front ends of the slit 38 and the line guide 34 can also be arranged alternately along the circumferential direction C.

[0114] According to the crushing device 100B of this embodiment, since a slit 38 is formed on the front end face 33B, the stone S is not easily displaced from the front end face 33B.

[0115] The second embodiment of the present invention has been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to this embodiment, and design changes that do not depart from the spirit of the present invention are also included. Furthermore, the constituent elements shown in the above embodiments and variations can be appropriately combined to form a configuration.

[0116] In the above embodiment, the number of protrusions 37 having a front end face 33B is four, but the number of protrusions 37 is not limited to this. From the viewpoint of fixing the stone S, it is preferable that the number of protrusions 37 is at least three or more.

[0117] (Third Implementation)

[0118] Reference Figures 16 to 17 The crushing device 100C according to the third embodiment of the present invention will be described. In the following description, the same reference numerals are used for structures that are common to those already described, and repeated descriptions are omitted.

[0119] Figure 16 This is a perspective view of the front end of the crusher 100C.

[0120] The crusher 100C, like the crusher 100 of the first embodiment, is used together with the endoscope 200 as an endoscope treatment system. The crusher 100C has a sheath 1, an operating line 2, a front end member 3C, a basket 4, and an operating section 5.

[0121] Figure 17 This is a cross-sectional view of the front end of the crusher 100C.

[0122] The front end component 3C is mounted on the front end 1a of the sheath 1. The front end component 3C is made of a metal such as stainless steel. The central axis O3 of the front end component 3C in the length direction A is consistent with the central axis O1 of the sheath 1 in the length direction A. The front end component 3C has a main body 31C, a tapered portion 32, and a wire guide portion 34C.

[0123] The main body 31C is cylindrical and is mounted on the front end 1a of the sheath. The internal space 3s of the main body 31C is connected to the internal space 1s of the sheath 1. Four line guides 34C are formed in the main body 31C along the circumferential direction C relative to the length direction A.

[0124] The line guide portion 34C is a groove extending along the length direction A on the outer periphery of the main body 31C. Four line guide portions 34C are arranged at different positions on the circumferential direction C of the main body 31C. The four line guide portions 34C are arranged radially outward relative to the central axis O3. The four line guide portions 34C are separated by an inclined wall 35C, which is located radially inward on the inner side of the front end member 3C.

[0125] The inclined wall (inclined surface) 35C is a surface that is inclined outward toward the radial R as it moves from the base end of the front end member 3C toward the front end. When the basket line 41 is moved forward and backward, the basket line 41 is guided by the inclined wall 35C.

[0126] The front end 34a of the wire guide portion 34C is located on the side 32s of the tapered portion 32. Therefore, the wire guide portion 34C does not extend to the front end face 33. In other words, the front end face 33 is located on the front end head 42 side (far side A1) of the front end 34a of the wire guide portion 34C.

[0127] The base end 34b of the wire guide portion 34C extends to the main body 31C. An opening (wire penetration portion, guide cavity) 36 is formed in the main body 31C that communicates with the internal space 3s of the main body 31. The front end face 33 is located on the front end head 42 side (distal side A1) of the opening 36.

[0128] Preferably, the length L1 of the front end face 33 of the front end member 3C in the radial direction R is smaller than the inner diameter L2 of the front end of the main body 31C.

[0129] Furthermore, the number of net basket strings 41 is not limited to four; for example, it can be three, five, or six. The number of string guides 34C varies depending on the number of net basket strings 41.

[0130] According to the crushing device 100C of this embodiment, since the wire guide portion 34C has an inclined wall 35C, the basket wire 41 is easily penetrated, and the opening and closing force of the basket 4 is reduced. Furthermore, the force transmitted from the operating portion 5 to the stone S is increased. Additionally, when the exposed position of the basket wire 41 is on the outer side of the radial R, the basket wire 41 easily follows the stone S while holding it. Therefore, the length of the tapered portion 32 in the longitudinal direction A can be shortened. As a result, the endoscope penetration performance is improved, and the stability when the front end face 33 abuts against the stone S is also improved.

[0131] The third embodiment of the present invention has been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to this embodiment, and design changes that do not depart from the spirit of the present invention are also included. Furthermore, the constituent elements shown in the above embodiments and variations can be appropriately combined to form a configuration.

[0132] (Modified example)

[0133] Figure 18 This is a perspective view of the front end of a crusher 100D, a variant of the crusher 100C. The crusher 100D has a sheath 1, an operating line 2, a front end member 3D, a basket 4, and an operating section 5.

[0134] Figure 19 This is a cross-sectional view of the front end of the crusher 100D.

[0135] Compared to front-end component 3C, front-end component 3D has a line guide portion 34D instead of line guide portion 34C. Front-end component 3D has a main body 31C, a tapered portion 32, and a line guide portion 34D.

[0136] The line guide portion 34D is a groove extending along the length direction A on the outer periphery of the main body 31C and the tapered portion 32. Four line guide portions 34D are arranged at different positions on the circumferential direction C of the main body 31C. The four line guide portions 34D are arranged radially outward relative to the central axis O3. The four line guide portions 34D are separated by an inclined wall 35C, which is provided radially inward on the inner side of the front end member 3C.

[0137] The front end 34a of the wire guide portion 34D extends to the front end face 33 of the tapered portion 32. The front end 34a of the wire guide portion 34D is disposed at the periphery of the front end face 33.

[0138] (Fourth Implementation)

[0139] Reference Figures 20 to 21 The crushing device 100E according to the fourth embodiment of the present invention will be described. In the following description, the same reference numerals are used for structures that are common to those already described, and repeated descriptions are omitted.

[0140] Figure 20 This is a perspective view of the front end of the crusher 100E.

[0141] The crusher 100E, like the crusher 100 of the first embodiment, is used together with the endoscope 200 as an endoscope treatment system. The crusher 100E has a sheath 1, an operating line 2, a front end member 3E, a basket 4, and an operating part 5.

[0142] Figure 21 This is a cross-sectional view of the front end of the crusher 100E.

[0143] The front end member 3E is mounted on the front end 1a of the sheath 1. The front end member 3E is made of a metal such as stainless steel. The central axis O3 of the front end member 3E in the length direction A is consistent with the central axis O1 of the sheath 1 in the length direction A. The front end member 3E has a main body 31, a tapered portion 32, and a wire guide portion 34E.

[0144] The line guide portion 34E is a groove extending along the length direction A on the outer periphery of the tapered portion 32. Four line guide portions 34E are arranged at different positions on the circumferential direction C of the main body 31. The four line guide portions 34E are arranged radially outward relative to the central axis O3. The four line guide portions 34E are separated by an inclined wall 35C, which is provided radially inward on the inner side of the front end member 3E.

[0145] The front end 34a of the wire guide portion 34E is located on the side 32s of the tapered portion 32. Therefore, the wire guide portion 34E does not extend to the front end face 33. In other words, the front end face 33 is located on the front end head 42 side (far side A1) of the wire guide portion 34E, compared to the front end 34a of the wire guide portion 34E.

[0146] The base end 34b of the wire guide portion 34E extends to the main body 31. An opening (wire penetration portion, guide cavity) 36 is formed between the main body 31 and the wire guide portion 34E, communicating with the internal space 3s of the main body 31. The front end face 33 is located on the front end head 42 side (distal side A1) of the opening 36.

[0147] Preferably, the length L1 of the front end face 33 of the front end member 3E in the radial direction R is smaller than the inner diameter L2 of the front end of the body 31.

[0148] Furthermore, the number of net basket strings 41 is not limited to four; for example, it can be three, five, or six. The number of string guides 34E varies depending on the number of net basket strings 41.

[0149] According to the crushing device 100E of this embodiment, since the wire guide portion 34E has an inclined wall 35C, the basket wire 41 is easily penetrated, and the opening and closing force of the basket 4 is reduced. Furthermore, the force transmitted from the operating portion 5 to the stone S is increased. Additionally, when the exposed position of the basket wire 41 is on the outer side of the radial R, the basket wire 41 easily follows the stone S while holding it. Therefore, the length of the tapered portion 32 in the longitudinal direction A can be shortened. As a result, the endoscope penetration performance is improved, and the stability when the front end face 33 abuts against the stone S is also improved.

[0150] The fourth embodiment of the present invention has been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to this embodiment, and design changes that do not depart from the spirit of the present invention are also included. Furthermore, the constituent elements shown in the above embodiments and variations can be appropriately combined to form a configuration.

[0151] In the above embodiments, the wire guide portions 34, 34C, 34D, and 34E are grooves. However, the shape of the wire guide portion is not limited to this. The wire guide portion is not limited to a groove, but may also be a guide cavity that is at least partially formed as a tube.

[0152] (Fifth implementation method)

[0153] Reference Figures 22 to 25 The accessory 3F of the fifth embodiment of the present invention will be described. In the following description, the same reference numerals are used for structures that are common to the structures already described, and repeated descriptions are omitted.

[0154] Figure 22 This is a 3D view of accessory 3F.

[0155] Accessory 3F is installed in such Figure 24 The components of the conventional crusher Q are shown. Fitting 3F is made of a metal such as stainless steel. Fitting 3F has a conical portion 32 and a loading / unloading portion 39.

[0156] The loading / unloading section 39 is cylindrical in shape, and four line guides 34F are formed along the circumferential direction C relative to the length direction A. At the end of the loading / unloading section 39 on the base end side A1, a plurality of engaging protrusions 39p protruding inward toward the radial direction R are provided.

[0157] The line guide portion 34F is a groove extending along the length direction A on the outer periphery of the loading / unloading portion 39. Four line guide portions 34F are arranged at different positions on the circumferential direction C of the loading / unloading portion 39. The four line guide portions 34F are arranged radially outward relative to the central axis O3.

[0158] The front end 34a of the wire guide portion 34F is located on the side 32s of the tapered portion 32. Therefore, the wire guide portion 34F does not extend to the front end face 33. In other words, the front end face 33 is located at a position A1 further distal than the front end 34a of the wire guide portion 34F.

[0159] The base end 34b of the wire guide portion 34F extends to the base end of the loading and unloading portion 39. That is, the wire guide portion 34F is a slit.

[0160] Figure 23 This is a sectional view of accessory 3F.

[0161] The line guide portion 34F has a guide cavity 36F that communicates with the internal space 3s of the loading and unloading portion 39. The guide cavity 36F has an inclined surface 35C that slopes radially outward from the base end toward the front end.

[0162] Furthermore, the number of net basket strings 41 is not limited to four; for example, it can also be three, five, or six. The number of string guides 34F varies depending on the number of net basket strings 41.

[0163] Figure 25 This is a perspective view of accessory 3F, which is installed on the front end component P of a conventional crusher Q. The loading / unloading part 39 can be loaded and unloaded relative to the front end component P of the conventional crusher Q via fitting (including snap-fit ​​engagement). For example, as... Figure 24As shown, multiple engaging recesses 31r are provided on the main body 31 of the front component P of the crusher Q. Figure 25 As shown, the engaging protrusion 39p of the loading / unloading part 39 and the engaging recess 31r of the front end member P of the crusher Q are engaged by a snap-fit, thereby mounting the loading / unloading part 39 to the front end member P. Furthermore, the mounting method of the loading / unloading part 39 is not limited to fitting. For example, the loading / unloading part 39 can also be fixed to the front end member P using adhesive tape.

[0164] When the loading / unloading part 39 is installed on the front end member P, the internal space 3s of the loading / unloading part 39 communicates with the internal space 1s of the sheath 1. With the loading / unloading part 39 installed on the front end member P, the front end face 33 is located closer to the front end head 42 (far side A1) than the front end 34a of the line guide part 34F. Furthermore, with the loading / unloading part 39 installed on the front end member P, the basket line 41 passes through the slit of the line guide part 34F, and when the basket line 41 is moved forward or backward, it is guided by the inclined surface 35C.

[0165] According to accessory 3F of this embodiment, by installing it on a conventional crusher Q, the conventional crusher Q can be used as a crusher 100F having the same function as the crusher 100 of the first embodiment.

[0166] The fifth embodiment of the present invention has been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to this embodiment, and design changes that do not depart from the spirit of the present invention are also included. Furthermore, the constituent elements shown in the above embodiments and variations can be appropriately combined to form a configuration.

[0167] Industrial availability

[0168] This invention can be applied to endoscopic treatment devices with a basket wire, etc.

[0169] Explanation of reference numerals in the attached figures

[0170] 300. Endoscopic treatment system; 200. Endoscope; 100, 100A, 100B, 100C, 100D, 100E, 100F. Disruptor (Endoscopic treatment device); 1. Sheath; 1s. Internal space (lumen); 2. Operating line; 3. 3A, 3B, 3C. Front end component; 3F. Accessory; 3s. Internal space; 31, 31C. Main body; 32. Conical part; 32B. Front end; 33, 33B. Front end face; 33h. Opening; 34, 34C, 34F. Line guide; 341. First line guide; 342. Second line guide; 343. Third line guide; 34 4. Fourth guide section; 35. Wall; 35C. Inclined wall (inclined surface); 36. Opening (line penetration); 37. Protrusion; 38. Slit; 39. Loading / unloading section; 4. Net basket; 41. Net basket line; 411. First net basket line; 412. Second net basket line; 413. Third net basket line; 414. Fourth net basket line; 42. Front end head; 43. Binding section; 5. Operating section; 51. Main body of operating section; 52. Liquid supply port; 53. Sliding element; 54. Guide line port; A. Length direction; A1. Front end side (distal side); A2. Base end side (proximal side); B. Bile duct; C. Circumferential direction; R. Radial direction; S. Stone.

Claims

1. A crushing device, wherein, This crushing device has the following features: jacket; A front-end component, which is mounted on the front end of the sheath; as well as The basket lines protrude from the front end of the front end component. The front end component has a line guide portion for guiding the basket line. The line guide portion is radially positioned outside the front end face of the front end member.

2. The crushing device according to claim 1, wherein, The line guide is arranged in multiple positions at different locations in the circumferential direction of the front end member.

3. The crushing device according to claim 1, wherein, The line guide portion is separated by a wall disposed on the radially inner side of the front end member.

4. The crushing device according to claim 1, wherein, The line guide portion has an inclined surface that slopes outward in the radial direction as it moves from the base end of the front end member toward the front end.

5. The crushing device according to claim 1, wherein, The front end member has a tapered portion that tapers towards the front end of the front end member. The front end of the line guide is located at the tapered portion.

6. The crushing device according to claim 1, wherein, The front end surface of the front end component is flat.

7. The crushing device according to claim 1, wherein, The front end surface of the front end component is a curved surface that protrudes from the base end of the front end component toward the front end.

8. The crushing device according to claim 1, wherein, The front end face of the front end member has at least three protrusions. The front end of the line guide and the protrusion are arranged alternately along the circumference of the front end member.

9. The crushing device according to claim 1, wherein, An opening is formed on the front end face of the front end member. The opening is positioned radially inward of the front end of the line guide.

10. The crushing device according to claim 1, wherein, An opening is formed on the front end face of the front end member. The front end face of the front end component is located at a position further away from the opening.

11. The crushing device according to claim 1, wherein, On the front end face of the front end member, a slit extending radially through the central axis of the front end member is provided. The front end of the line guide and the slit are arranged alternately in the circumferential direction of the front end member.

12. The crushing device according to claim 1, wherein, On the front end face of the front end member, a slit extending radially through the central axis of the front end member is provided. The slit is connected to the front end of the line guide.

13. The crushing device according to claim 1, wherein, The line guide has a guide lumen.

14. The crushing device according to claim 9, wherein, The front end member has a cylindrical main body and a tapered part that tapers towards the front end of the front end member. The radial length of the front end face of the front end member is smaller than the inner diameter of the main body.

15. The crushing device according to claim 14, wherein, The maximum distance from the opening to the front end face is greater than the inner diameter of the main body.

16. An accessory for a crushing device, wherein, The crusher's fittings have a guide cavity through which the wire mesh can pass. The guide lumen has an inclined surface that slopes radially outward as it moves from the base towards the front end.

17. A crushing device, wherein, This crushing device has the following features: jacket; The front-end component, which is mounted on the front end of the sheath; and A basket, formed by basket lines protruding from the front end of the front end member. When the basket line is further pulled toward the base end of the sheath while the stone has been captured using the basket, the front end of the front end member is pressed against the stone.

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