Incision device for endoscope and endoscope

Abstract

The embodiment of the utility model provides an incision device for an endoscope and the endoscope. The incision device for the endoscope comprises an operation part; the sheathing canal comprises a first cavity; the cutting wire is at least partially arranged in the first cavity channel, the near end of the cutting wire is connected with the operation part, the far end of the cutting wire comprises a cutting section, the operation part drives the far end of the sheath tube to bend or rotate by controlling the cutting wire to move in the sheath tube, and the cutting section is connected with the operation part through high-frequency current. And the cutting section can form a knife part for cutting tissues.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and in particular to an endoscopic incision device and an endoscope. Background Art

[0002] Endoscopic sphincterotomy (EST) is a clinical procedure that uses endoscopic retrograde cholangiopancreatography (ERCP) to cut the duodenal sphincter with a high-frequency electric knife under the endoscope to expand the bile duct opening. During the operation, after the ERCP operation is completed, the cutting wire is gently retracted to bend the front end of the sheath into an arch shape, exposing the cutting knife and passing a high-frequency current through the cutting knife to cut the duodenal sphincter. Among them, if the force of pulling the cutting wire is not controlled well, it is easy to cause the cutting wire to break or fall off, so the experience of the operator is extremely high.

[0003] Therefore, it is necessary to provide an endoscope and an incision device thereof to solve the above-mentioned technical problems. Utility Model Content

[0004] One or more embodiments of the present specification provide an endoscopic incision device, comprising: an operating part; a sheath tube, comprising a first cavity; a filament, the filament being at least partially disposed in the first cavity, the proximal end of the filament being connected to the operating part, the distal end of the filament comprising: a cutting segment, the cutting segment extending from the side wall of the sheath tube to the outside of the sheath tube; a bending action segment, the bending action segment being disposed at the distal end side of the cutting segment, the bending action segment being configured to drive the distal end of the sheath tube to bend when the operating part pulls the filament from the distal end to the proximal end; and a rotating action segment, the rotating action segment being configured to drive the sheath tube to rotate around the axis of the proximal end of the filament when the operating part rotates the filament.

[0005] In some embodiments, the endoscopic incision device also includes a first limiter, which is disposed in the first cavity, and the bending action segment is fixed to the first limiter, and the first limiter is used to limit the axial displacement of the bending action segment relative to the first cavity.

[0006] In some embodiments, an axially limiting snap-fit ​​structure is formed between the first limiting member and the inner wall of the first cavity, and the snap-fit ​​structure includes at least one limiting recess and at least one limiting protrusion extending in the circumferential direction, one of the limiting recess and the limiting protrusion is arranged on the outer wall of the first limiting member, and the other is arranged on the inner wall of the first cavity, and the limiting recess and the limiting protrusion are engaged with each other.

[0007] In some embodiments, the cross-sectional shape of the first limiting member is circular, and the engaging structure includes one or more combinations of a tower-shaped structure, a sawtooth-shaped structure, and a threaded structure.

[0008] In some embodiments, at least a portion of the cross-sectional shape of the first limiting member is non-circular, and the first limiting member and the first cavity form a circumferential limit.

[0009] In some embodiments, the first limiting member is configured as a cylinder with a uniform cross-section along its axial direction, and the first limiting member is fixed in the first cavity by means of interference fit.

[0010] In some embodiments, the side wall of the first lumen is formed with a first perforation group and at least one second perforation group connected to the outer wall of the sheath, and the at least one second perforation group is arranged on the distal side of the first perforation group. The first perforation group includes a first hole and a second hole. The cut wire passes through the first hole to the outside of the sheath to form the cutting section, the bending action section passes through the second hole to the first lumen, and the rotating action section passes through the second perforation group in sequence and is fixed to the first lumen.

[0011] In some embodiments, the endoscopic cutting device also includes a second limiter, which is axially movably disposed in the first cavity, and at least a portion of the rotating action section is fixed to the second limiter, and the second limiter is used to limit the circumferential displacement of the rotating action section relative to the first cavity.

[0012] In some embodiments, a circumferentially limiting limiting structure is formed between the second limiting member and the inner wall of the first cavity, and the limiting structure includes at least one recess and at least one protrusion extending along the axial direction, one of the recess and the protrusion is arranged on the outer wall of the second limiting member, and the other is arranged on the inner wall of the first cavity, and the recess and the protrusion cooperate with each other.

[0013] In some embodiments, the endoscopic incision device further includes a second lumen connected to the first lumen, the second lumen is non-collinearly arranged with the first lumen, and the rotation action section is located in the second lumen.

[0014] In some embodiments, the second lumen is parallel to the first lumen, and the rotational action section enters the second lumen and extends toward the distal end of the sheath or toward the proximal end of the sheath.

[0015] In some embodiments, the inner diameter of the second cavity is equal to the outer diameter of the rotation section.

[0016] In some embodiments, the operating part includes a pulling part and a rotating part, the pulling part is used to control the movement of the cutting wire from the distal end to the proximal end, the bending action segment drives the distal end of the sheath to bend, the rotating part is used to control the rotation of the cutting wire, and the rotating action segment drives the sheath to rotate; the rotating part is connected to the proximal end of the pulling part; or, the rotating part and the pulling part are arranged at a distance.

[0017] One or more embodiments of the present specification also provide an endoscope, which includes the endoscopic incision device as described in any of the above embodiments.

[0018] According to the scheme in the above embodiment, the bending action section and the rotation action section of the wire cutting are separately arranged, so that the force applied to the wire cutting control sheath when it is bent and the force applied to the wire cutting control sheath when it is rotated can be dispersed at different positions of the wire cutting, thereby avoiding excessive concentration of stress when the control sheath is bent and rotated, and preventing the wire from breaking or falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0020] Figure 1 is a schematic diagram of an endoscopic incision device according to some embodiments of the present specification;

[0021] Figure 2 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 1 ;

[0022] Figure 3 is a cross-sectional view of the distal end of an endoscopic incision device according to some embodiments of the present specification;

[0023] Figure 4 is a schematic diagram of the distal end of an endoscopic cutting device in a bent state according to some embodiments of the present specification;

[0024] Figure 5 This is a schematic diagram of the structure of the first limiter shown in some embodiments of this specification. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the structure of the first limiter shown in some embodiments of this specification. Figure 2 ;

[0026] Figure 7 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 2 ;

[0027] Figure 8 is based on Figure 7 A schematic cross-sectional view of an endoscopic cutting device taken along AA shown in some embodiments;

[0028] Fig. 9 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 3 ;

[0029] Fig.10 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 4 ;

[0030] Fig.11A is based on Fig.10 A partial enlarged view of the endoscopic cutting device in area B shown in some embodiments;

[0031] Fig. 11B is based on Fig.10 A schematic cross-sectional view of an endoscopic cutting device taken along CC shown in some embodiments;

[0032] Fig.12 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 5 ;

[0033] Fig.13 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 6 ;

[0034] Fig.14 is based on Fig.12 A schematic cross-sectional view of an endoscopic cutting device taken along DD shown in some embodiments.

[0035] The accompanying drawings are marked as follows:

[0036] 100, operating part; 110, liner assembly frame; 120, metal electrode; 130, guide hose; 140, pulling part; 150, rotating part; 200, sheath; 210, first cavity; 220, first perforation group; 221, first hole; 222, second hole; 230, second perforation group; 231, exit hole; 232, entry hole; 240, second cavity; 250, through hole; 300, wire cutting; 310, cutting section; 320, bending action section; 330, rotating action section; 400, insulating sleeve; 500, first limit member; 510, locking structure; 600, second limit member; 610, limit structure. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0038] It should be understood that the "device", "structure" and / or "module" used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0039] As shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0040] Endoscopic cutting device refers to the main medical device used for endoscopic sphincterotomy (EST). The endoscopic cutting device includes an operating unit, a sheath, and a cutting wire. The operating unit is connected to the proximal end of the sheath. The cutting wire passes through the inside of the sheath to the distal end of the sheath and forms a cutting segment on the outside of the distal end of the sheath. The cutting of the papillary sphincter is achieved by passing a high-frequency current through the cutting segment. During the operation, the operator gently pulls the cutting wire through the operating unit to bend the front end of the sheath, or rotates the cutting wire to rotate the sheath. Due to concentrated force on the cutting wire or unstable connection, accidents such as wire breakage or detachment may occur, increasing the risk of surgery.

[0041] In view of this, some embodiments of the present specification provide an endoscopic cutting device, which solves the problem of the cut wire being broken due to stress concentration by dispersing the force exerted on the cut wire at different positions of the cut wire, for example, separating the rotation action section of the cut wire from the bending action section, and solves the problem of the cut wire falling off due to the large pulling force by improving the fixing method of the cut wire, for example, reinforcing the cut wire by a first limit member and / or a second limit member.

[0042] Figure 1 It is a schematic diagram of an endoscopic incision device according to some embodiments of the present specification.

[0043] like Figure 1 As shown, the endoscopic incision device includes an operation portion 100 , a sheath tube 200 , and a cutting wire 300 .

[0044] In some embodiments, the sheath 200 includes at least one internal lumen (not shown in the figure), for example, the sheath 200 includes an injection lumen for injecting solutions such as developer, a guidewire lumen for accommodating a guidewire, a cutting wire lumen for accommodating a cutting wire 300 (hereinafter referred to as the first lumen 210 and the second lumen 240), etc.

[0045] In some embodiments, the operating part 100 is disposed at the proximal end of the sheath 200, and the operating part 100 includes a handle (bracelet, hand wheel, etc.) for operating the wire cutter 300, a liner assembly frame 110 connected to the distal end of the handle, a metal electrode 120 disposed on the liner assembly frame 110, and a guide hose 130 disposed between the liner assembly frame 110 and the sheath 200 and other components.

[0046] In some embodiments, at least part of the cutting wire 300 is contained in the sheath tube 200, and the proximal end of the cutting wire 300 is connected to the operating part 100, and the operating part 100 can be held by an operator and control the cutting wire 300, for example, the operating part 100 can control the cutting wire 300 to move along the axial direction of the sheath tube 200 or rotate around its own axis, etc. The axial direction of the sheath tube 200 refers to the length direction of the sheath tube 200.

[0047] Figure 2 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 1 . Figure 3 It is a cross-sectional view of the distal end of the endoscopic incision device shown in some embodiments of the present specification. Figure 4 It is a schematic diagram of the distal end of the endoscopic cutting device in a bent state according to some embodiments of the present specification.

[0048] like Figures 1 to 4 As shown, in some embodiments, the sheath tube 200 includes a first lumen 210 for accommodating the cutting wire 300 , and the first lumen 210 extends from the proximal end of the sheath tube 200 to the distal end along the axial direction of the sheath tube 200 .

[0049] In some embodiments, at least a portion of the cutting wire 300 is movably disposed in the first lumen 210 , and at least another portion of the cutting wire 300 extends out of the sheath tube 200 from the side wall of the sheath tube 200 and is connected to the distal end of the sheath tube 200 .

[0050] In some embodiments, the distal end of the shredder 300 includes a cutting section 310, a bending section 320, and a rotating section 330. In some embodiments, the cutting section 310, the bending section 320, and the rotating section 330 are adjacently arranged on the shredder 300. In some embodiments, the cutting section 310, the bending section 320, and the rotating section 330 are spaced apart on the shredder 300. It should be noted that the cutting section 310, the bending section 320, and the rotating section 330 may refer to sections with corresponding functions on the shredder 300, and their edge ends do not have clear boundaries. For example, the bending section 320 may refer to an action section in which the shredder 300 drives the sheath 200 to bend, and the rotating section 330 may refer to an action section in which the shredder 300 drives the sheath 200 to rotate. Small sections at both ends of these action sections that do not have corresponding functions may also be divided into corresponding action sections.

[0051] In some embodiments, the cutting section 310 includes a section of the cutting wire 300 located outside the sheath 200, which is used to form a knife portion for cutting human tissue. For example, a high-frequency current is passed to the cutting section 310 through the metal electrode 120 on the liner assembly frame 110, so that the cutting section 310 can cut the target cutting object (such as the nipple sphincter, etc.). In some embodiments, the endoscopic cutting device also includes an insulating sleeve 400, at least part of which is arranged outside the sheath 200, a part of the cutting section 310 is sleeved in the insulating sleeve 400, and another part is exposed outside the insulating sleeve 400 as a cutting tool. The insulating layer can shorten the actual cutting distance of the cutting section 310 to reduce the wound. In some embodiments, a part of the insulating sleeve 400 is arranged in the first cavity 210 of the sheath 200, and another part is arranged on the outside of the sheath 200. In other embodiments, the insulating sleeve is entirely arranged on the outside of the sheath 200. In some embodiments, the insulating sleeve 400 is covered on the cut wire 300 and can move with the cut wire 300. When the operating part 100 controls the cut wire 300 to move axially relative to the first cavity 210, the insulating sleeve 400 located outside the sheath tube 200 will retract into the first cavity 210.

[0052] In some embodiments, the cutting wire 300 includes a bending action section 320, which may refer to a portion of the cutting wire 300 that contacts the sheath tube 200 and applies a pulling force to the sheath tube 200 when the distal end of the sheath tube 200 is pulled and bent. In some embodiments, the bending action section 320 is disposed at the distal end of the cutting section 310, and the bending action section 320 is configured to drive the distal end of the sheath tube 200 to bend when the operating unit 100 pulls the cutting wire 300 from the distal end to the proximal end.

[0053] In some embodiments, the wire cutter 300 includes a rotational action section 330, which may refer to a portion of the wire cutter 300 that contacts the sheath tube 200 and applies torque to the sheath tube 200 when the wire cutter 300 rotates around its own axis. In some embodiments, the rotational action section 330 may be disposed at the proximal side of the cutting section 310 and / or the bending action section 320, or may be disposed at the distal side of the cutting section 310 and / or the bending action section 320, and the rotational action section 330 is configured to drive the sheath tube 200 to rotate around the axis of the proximal end of the wire cutter 300 when the operating unit 100 rotates the wire cutter 300.

[0054] According to the scheme in the above embodiment, the bending action section 320 and the rotation action section 330 of the cutting wire 300 are separately arranged, so that the force applied to the cutting wire 300 when controlling the sheath tube 200 to bend and the force applied to the cutting wire 300 when controlling the sheath tube 200 to rotate can be dispersed at different positions of the cutting wire 300, thereby avoiding excessive concentration of stress on the cutting wire 300 when controlling the sheath tube 200 to bend and rotate, and preventing the cutting wire 300 from breaking or falling off.

[0055] Hereinafter, some exemplary embodiments of the bending action section 320 and its related components (such as the first limiting member 500 ) will be described in detail with reference to the accompanying drawings.

[0056] In some embodiments, the bending action section 320 forms an axial limit with the first lumen 210, so that the distal end of the sheath tube 200 is bent under the pulling force of the operating part 100 from the distal end to the proximal end. In some embodiments, the bending action section 320 forms an axial limit with the first lumen 210 in a manner including but not limited to providing a first limiter 500, interference fit, and the like.

[0057] In some embodiments, the endoscopic cutting device further includes a first stopper 500, which is disposed in the first lumen 210, and the bending action section 320 is fixed to the first stopper 500, and the first stopper 500 is used to limit the axial displacement of the bending action section 320 relative to the first lumen 210. After the axial displacement of the bending action section 320 relative to the first lumen 210 is limited, the operating unit 100 pulls the cutting wire 300 from the distal end to the proximal end, so that the proximal end of the cutting section 310 located outside the sheath tube 200 enters the first lumen 210, and drives the distal end of the sheath tube 200 to bend into an arch shape through the bending action section 320. At this time, the cutting section 310 changes from a state of being in contact with the side wall of the sheath tube 200 to a state of being spaced apart from the side wall of the sheath tube 200, so as to be used as a knife to cut human tissue.

[0058] In some embodiments, the bending section 320 is fixedly connected to the first stopper 500. In some embodiments, the bending section 320 is integrally formed with the first stopper 500.

[0059] like Figure 3As shown, in some embodiments, an axially limited snap-fit ​​structure 510 is formed between the first stopper 500 and the inner wall of the first lumen 210, and the snap-fit ​​structure 510 includes at least one limit recess and at least one limit protrusion extending in the circumferential direction, one of the limit recess and the limit protrusion is provided on the outer wall of the first stopper 500, and the other is provided on the inner wall of the first lumen 210, and the limit recess and the limit protrusion are engaged with each other. When the limit recess and the limit protrusion are engaged, the first stopper 500 is axially positioned relative to the first lumen 210, so that the bending action section 320 can drive the distal end of the sheath tube 200 to bend.

[0060] In some embodiments, the snap-fit ​​structure 510 includes a plurality of limiting protrusions and a plurality of limiting recesses, wherein the plurality of limiting protrusions are arranged at intervals along the axial direction on the inner wall of the first cavity 210 (or the outer wall of the first limiting member 500), and the plurality of limiting recesses are arranged at intervals along the axial direction on the outer wall of the first limiting member 500 (or the inner wall of the first cavity 210), and the limiting protrusions and the limiting recesses correspond to each other one by one and cooperate with each other.

[0061] In some embodiments, the engaging structure 510 includes a plurality of limiting protrusions and a plurality of limiting recesses. At least one of the plurality of limiting protrusions is disposed on the inner wall of the first cavity 210, and the remaining limiting protrusions are disposed on the outer wall of the first limiting member 500; at least one of the plurality of limiting recesses is disposed on the outer wall of the first limiting member 500, and the remaining limiting recesses are disposed on the inner wall of the first cavity 210. In some other embodiments, the limiting protrusions and limiting recesses of the engaging structure 510 may also be other configurations.

[0062] Figure 5 The structure of the first stopper 500 shown in some embodiments of this specification is shown in FIG. Figure 1 . Figure 6 The structure of the first stopper 500 shown in some embodiments of this specification is shown in FIG. Figure 2 .

[0063] like Figure 5 and Figure 6As shown, in some embodiments, the first stopper 500 only limits the axial displacement of the bending action section 320 relative to the first lumen 210, but does not limit the circumferential displacement of the bending action section 320 relative to the first lumen 210. In some embodiments, the cross-sectional shape of the first stopper 500 is circular, and the first stopper 500 can rotate relative to the first lumen 210. In some embodiments, the bending action section 320 includes a portion from the position where the distal end of the cutting section 310 enters the sheath 200 to the portion that penetrates the distal end of the first stopper 500. Since the first stopper 500 has a circumferential degree of freedom of movement relative to the first lumen 210, the rotation action section 330 can be driven to rotate by the first stopper 500. For example, during a surgical operation, when the rotating action segment 330 is disposed at the distal end of the bending action segment 320, the operating portion 100 drives the cutting wire 300 to rotate, the cutting wire 300 drives the first limiting member 500 to rotate, and the first limiting member 500 drives the rotating action segment 330 to rotate, thereby causing the rotating action segment 330 to drive the sheath 200 to rotate.

[0064] In some embodiments, the first limiting member 500 forms an axial limit through a snap-fit ​​structure 510 , and the snap-fit ​​structure 510 includes one or more combinations of a tower-like structure, a sawtooth-like structure, and a threaded structure.

[0065] like Figure 5 As shown, in some embodiments, the engaging structure 510 includes a tower-shaped structure, which is formed by overlapping multiple frustums with one end larger than the other end, and the end of the tower-shaped structure with a larger diameter engages with the inner wall of the first cavity 210 .

[0066] like Figure 6 As shown, in some embodiments, the engaging structure 510 includes a sawtooth structure, which is formed by a plurality of circular rings arranged on the first stopper 500. In some embodiments, the cross section of the circular ring includes but is not limited to a triangle, an arc, a quadrilateral, and the like.

[0067] In some other embodiments, the engaging structure 510 includes other structures such as a threaded structure.

[0068] According to the solution in the above embodiment, the first limiter 500 limits the axial displacement of the bending section 320, but does not limit the circumferential displacement of the bending section 320, so that the axial displacement and the circumferential displacement are dispersed to prevent the cut wire 300 from breaking and falling off.

[0069] Figure 7 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 2 . Figure 8 is based on Figure 7 A schematic cross-sectional view of an endoscopic cutting device taken along AA shown in some embodiments.

[0070] In some embodiments, the first stopper 500 can limit both the axial displacement of the bending action section 320 relative to the first cavity 210 and the circumferential displacement of the bending action section 320 relative to the first cavity 210 .

[0071] like Figures 7 and 8 As shown, in some embodiments, at least part of the cross-sectional shape of the first stopper 500 is non-circular, so that the first stopper 500 forms a circumferential limit with the first cavity 210. In some embodiments, the cross-sectional shape of the first stopper 500 includes but is not limited to a triangle, a rectangle, a pentagon, a gear shape, etc.

[0072] In some embodiments, the first stopper 500 includes an axial stopper engagement structure 510 and a circumferential stopper non-circular cross-section portion, so that the first stopper 500 not only limits the axial displacement of the cut wire 300 relative to the first cavity 210, but also limits the circumferential displacement of the cut wire 300 relative to the first cavity 210. For example, the first stopper 500 can be configured as a square tower structure, etc.

[0073] In some embodiments, the first stopper 500 is fixed to the first lumen 210 in both the axial and circumferential directions, the distal end of the cutting wire 300 is fixed to the first stopper 500, the bending action section 320 includes a portion from the position where the distal end of the cutting section 310 enters the sheath 200 to the proximal end of the first stopper 500, and the rotation action section 330 includes a portion fixed inside the first stopper 500. During the surgical operation, when the operating part 100 pulls the cutting wire 300 from the distal end to the proximal end, the cutting wire 300 drives the distal end of the sheath 200 to bend through the bending action section 320; when the operating part 100 drives the cutting wire 300 to rotate, the cutting wire 300 transmits torque to the first stopper 500, and the first stopper 500 transmits torque to the sheath 200 and drives the sheath 200 to rotate.

[0074] In some embodiments, the first stopper 500 is constructed as a column of equal cross-section along its axial direction, and the first stopper 500 is fixed in the first cavity 210 by interference fit, and the interference fit enables the first stopper 500 to simultaneously limit the axial and circumferential displacement of the cut wire 300 in the first cavity 210. Among them, the column of equal cross-section refers to a column whose shape and size of any cross section along the axial direction of the first stopper 500 remain unchanged. In some embodiments, the first stopper 500 includes but is not limited to a cylindrical shape, a triangular prism, a quadrangular prism, a pentagonal prism, etc. The columnar structure is easy to process and saves costs.

[0075] According to the above technical solution, the first stopper 500 limits the axial displacement and circumferential displacement of the cut wire 300 relative to the first cavity 210, so that the bending action section 320 and the rotation action section 330 are arranged adjacent to each other, simplifying the overall structure.

[0076] Hereinafter, some exemplary embodiments of the rotation acting section 330 and its related components (such as the second stopper 600 and the second cavity 240 ) will be described in detail with reference to the accompanying drawings.

[0077] In some embodiments, the rotational action section 330 forms a circumferential limit with the first cavity 210, so that under the torsional force transmitted from the proximal end to the distal end of the operating portion 100, the sheath tube 200 is driven to rotate around the axis of the proximal end of the cutting wire 300. The axis of the proximal end of the cutting wire 300 refers to the axis of the portion of the cutting wire 300 located on the proximal side of the cutting section 310. In some embodiments, the rotational action section 330 repeatedly penetrates the second perforation group 230 (as described below) Fig. 9 and its related description) form a circumferential limit with the first cavity 210. In some embodiments, the rotation action section 330 is provided with a second limit member 600 (as described below) disposed in the first cavity 210. Fig.10 and Fig.11A , 11B and its related description) form a circumferential limit with the first cavity 210. In some embodiments, the rotation action section 330 is arranged in the second cavity 240 (as described below). Figure 12 to Figure 14 and its related description) forms a circumferential limit with the first cavity 210.

[0078] Fig. 9 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 3 .

[0079] In some embodiments, the side wall of the first lumen 210 is formed with a first perforation group 220 and at least one second perforation group 230 communicating with the outer wall of the sheath tube 200, and the at least one second perforation group 230 is disposed at the distal end of the first perforation group 220. The perforation group includes holes that allow the cut wire 300 to pass from the inside of the first lumen 210 to the outside of the sheath tube 200 and holes that allow the cut wire 300 to pass from the outside of the sheath tube 200 to the inside of the first lumen 210.

[0080] In some embodiments, the first perforation group 220 includes a first hole 221 and a second hole 222, and the shredded wire 300 passes through the first hole 221 to the outside of the sheath tube 200 to form a cutting section 310. The cutting section 310 includes a section between the position of the shredded wire 300 at the first hole 221 and the position of the shredded wire 300 at the second hole 222.

[0081] In some embodiments, the bending section 320 penetrates from the second hole 222 to the first cavity 210. The bending section 320 includes a section between the position where the cut wire 300 is located at the second hole 222 and the position where the cut wire 300 first penetrates the second hole 222 group.

[0082] In some embodiments, the rotation section 330 passes through the second perforation group 230 in sequence and is fixed to the first cavity 210. The rotation section 330 includes a section from the position where the cut wire 300 first passes through the second perforation group 230 to the position where the cut wire 300 finally passes through the second perforation group 230.

[0083] In some embodiments, the side wall of the first lumen 210 is formed with one or more second perforation groups 230, each second perforation group 230 includes an exit hole 231 and an entry hole 232, and the rotation action section 330 passes through the exit hole 231 in the first lumen 210 to the outside of the sheath 200, and passes through the entry hole 232 outside the sheath 200 into the first lumen 210, and continues to pass through other perforation groups in sequence. The rotation action section 330 forms a circumferential limit with the first lumen 210 through the second perforation group 230, and when the operating part 100 rotates the shredder 300, the rotation action section 330 drives the sheath 200 to rotate.

[0084] In some embodiments, the plurality of second perforation groups 230 are sequentially arranged along the axial direction of the sheath tube 200. In some embodiments, the plurality of second perforation groups 230 are randomly arranged in the axial direction and circumferential direction of the sheath tube 200. The present specification does not limit the arrangement of the second perforation groups 230.

[0085] According to the solution in the above embodiment, by providing the second perforation group 230 to cooperate with the rotating operation section, the structure is simple, and the rotation stress and the bending stress can be dispersed, thereby reducing the risk of the cut wire 300 falling off.

[0086] Fig.10 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 4 . Fig.11A is based on Fig.10 A partial enlarged view of area B of the endoscopic cutting device shown in some embodiments. Fig. 11B is based on Fig.10 A schematic cross-sectional view of an endoscopic cutting device taken along CC shown in some embodiments.

[0087] like Fig.10 , Fig.11A As shown, in some embodiments, the rotation segment 330 is disposed in the first lumen 210. In some embodiments, the rotation segment 330 is disposed at the proximal side of the cutting segment 310, or the rotation segment 330 is disposed between the bending segment 320 and the first stopper 500.

[0088] In some embodiments, the endoscopic cutting device also includes a second limit member 600, which is axially movably disposed in the first cavity 210, and at least a portion of the rotating action segment 330 is fixed to the second limit member 600, and the second limit member 600 is used to limit the circumferential displacement of the rotating action segment 330 relative to the first cavity 210.

[0089] In some embodiments, the portion of the cutting wire 300 that penetrates into the second stopper 600 constitutes a rotational action section 330. When the operating unit 100 controls the cutting wire 300 to rotate, the rotational action section 330 drives the second stopper 600 to rotate, and the second stopper 600 drives the sheath tube 200 to rotate. In some embodiments, the rotational action section 330 and the second stopper 600 are integrally formed or fixed by means of clamping, bonding, etc.

[0090] like Fig. 11B As shown, in some embodiments, a circumferentially limiting limiting structure 610 is formed between the second limiting member 600 and the inner wall of the first cavity 210, and the limiting structure 610 includes at least one recess and at least one protrusion extending axially, one of the recess and the protrusion is arranged on the outer wall of the second limiting member 600, and the other is arranged on the inner wall of the first cavity 210, and the recess and the protrusion cooperate with each other to limit the circumferential displacement of the limiting structure 610 and the inner wall of the first cavity 210.

[0091] In some embodiments, the cross-section of the second limit member 600 constitutes a cross-shaped symmetrical structure, and the inner wall of the first cavity 210 includes a protrusion that cooperates with the second limit member 600. When the wire cutting 300 drives the second limit member 600 to rotate, the force applied by the second limit member 600 to the side wall of the first cavity 210 is relatively uniform in the circumferential direction, thereby avoiding the failure of the torque applied by the second limit member 600 sheath 200.

[0092] In some embodiments, the length of the concave and / or convex portion of the inner wall of the first cavity 210 along the axial direction is greater than the length of the second stopper 600 along the axial direction, ensuring that the second stopper 600 always maintains a matching state with the concave and / or convex portion of the inner wall of the first cavity 210 when moving along the axial direction. In some embodiments, the length of the concave and / or convex portion of the inner wall of the first cavity 210 along the axial direction is 5 to 20 times the length of the second stopper 600 along the axial direction. In some embodiments, the inner wall of the first cavity 210 is entirely provided with concave and / or convex portions along the axial direction to simplify the processing of the first cavity.

[0093] Fig.12 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 5 . Fig.13 This is a partial enlarged schematic diagram of the distal end of the endoscopic incision device shown in some embodiments of this specification. Figure 6 . Fig.14 is based on Fig.12 A schematic cross-sectional view of an endoscopic cutting device taken along DD shown in some embodiments.

[0094] like Figure 3 , Figure 12 to Figure 14 As shown, in some embodiments, the endoscopic incision device further includes a second lumen 240 connected to the first lumen 210, the second lumen 240 is non-collinearly arranged with the first lumen 210, and the rotation action section 330 is located in the second lumen 240. When the operating part 100 rotates the cutting wire 300, the rotation action section 330 located in the second lumen 240 can generate torque on the cutting wire 300, so that the sheath tube 200 rotates with it. Since the second lumen 240 is non-collinearly arranged with the first lumen 210, the force arm of the rotation action section 330 to apply force to the sheath tube 200 increases, the torque is increased, and the sheath tube 200 is easier to rotate.

[0095] In some embodiments, the second cavity 240 is parallel to or intersects the first cavity 210 at an angle. For example, the second cavity 240 is perpendicular to the first cavity 210, or the angle between the second cavity 240 and the first cavity 210 is 30°, 45°, 60°, etc.

[0096] In some embodiments, the length of the second lumen 240 can be set according to actual needs. For example, the length of the second lumen 240 can be equal to the length of the rotation section 330. For another example, the length of the second lumen 240 can be greater than the length of the rotation section 330 and less than the axial length of the sheath 200. For another example, the length of the second lumen 240 is equal to the axial length of the sheath 200.

[0097] In some embodiments, the second lumen 240 is parallel to the first lumen 210, and the rotation section 330 enters the second lumen 240 and extends toward the distal end of the sheath tube 200 (eg, Fig.13 ) or extending toward the proximal end of the sheath tube 200 (as shown Fig.12 shown).

[0098] In some embodiments, a through hole 250 communicating with the first cavity 210 is formed on the side wall of the second cavity 240, and the filament 300 passes through the through hole 250 in the first cavity 210 and enters the second cavity 240. In some embodiments, the through hole 250 is disposed at the end of the second cavity 240. In some embodiments, the through hole 250 is disposed between the two ends of the second cavity 240.

[0099] In some embodiments, the inner diameter of the second lumen 240 is equal to the outer diameter of the rotating section 330, so that the rotating section 330 fits closely with the inner wall of the second lumen 240, making it easier to apply the rotating force of the rotating section 330 to the sheath 200 and improving the torque transmission efficiency.

[0100] In some embodiments, the second cavity 240 is a straight cavity. In some embodiments, the second cavity 240 is a curved cavity.

[0101] In the following, we will combine the attached Figure 1 Some exemplary embodiments of the operating unit 100 are described in detail.

[0102] like Figure 1 As shown, in some embodiments, the operating part 100 includes a pulling part 140 and a rotating part 150. For example, the pulling part 140 is used to control the movement of the cutting wire 300 from the distal end to the proximal end, so that the bending action section 320 of the cutting wire 300 drives the distal end of the sheath tube 200 to bend. When the distal end of the sheath tube 200 is bent, the part of the cutting wire 300 located outside the sheath tube 200 constitutes a knife part, which is convenient for cutting human tissue (such as the nipple sphincter). For example, the rotating part 150 is used to control the rotation of the cutting wire 300, so that the rotating action section 330 of the cutting wire 300 drives the sheath tube 200 to rotate, which is convenient for the operator to direct the aforementioned knife part to the direction to be cut (such as the 11 o'clock direction towards the nipple sphincter). By separately arranging the pulling part 140 and the rotating part 150, the rotation operation and the axial movement operation of the cutting wire 300 are controlled separately to avoid misoperation.

[0103] In some embodiments, the rotating portion 150 and the pulling portion 140 are disposed adjacent to each other on the operating portion 100, for example, the rotating portion 150 is connected to the proximal end of the pulling portion 140, so as to facilitate the operator to control. In some embodiments, the rotating portion 150 and the pulling portion 140 are disposed at intervals, for example, the pulling portion 140 is disposed at the proximal end of the operating portion 100, and the rotating portion 150 is disposed on the liner assembly frame 110.

[0104] In some embodiments, the pulling portion 140 includes at least one slider, which is slidably disposed on the operating portion 100 , and the proximal end of the cutting wire 300 is fixed to the slider. When the operator pulls the slider, the slider drives the cutting wire 300 to move axially in the sheath tube 200 .

[0105] In some embodiments, the rotating portion 150 includes a rotating bracelet, which is rotatably disposed at the proximal end of the operating portion 100, and the rotating bracelet is fixedly connected to the pulling portion 140. When the operator controls the rotating bracelet to rotate, the rotating bracelet drives the pulling portion 140 to rotate together, and the pulling portion 140 drives the shredded wire 300 to rotate. In some embodiments, the rotating portion 150 includes a hand wheel (not shown in the figure), which is disposed on the liner assembly frame 110, and the proximal end of the shredded wire 300 passes through the hand wheel and cooperates with the hand wheel. When the operator controls the hand wheel to rotate, the hand wheel can drive the shredded wire 300 to rotate around its own axis.

[0106] Some embodiments of the present specification also provide an endoscope, which includes an endoscopic cutting device as described in any of the above embodiments.

[0107] The beneficial effects that may be brought about by the embodiments of the present application include but are not limited to:

[0108] (1) The bending action section and the rotation action section of the wire cutting are separately arranged, so that the force applied to the wire cutting control sheath tube when it is bent and the force applied to the wire cutting control sheath tube when it is rotated can be dispersed at different positions of the wire cutting, thereby avoiding excessive concentration of stress on the wire cutting when the control sheath tube is bent and rotated, and preventing the wire cutting from breaking or falling off.

[0109] (2) The first limiter limits the axial displacement of the bending action section, but does not limit the circumferential displacement of the bending action section, so that the axial displacement and the circumferential displacement are dispersed to prevent the cut wire from breaking and falling off.

[0110] (3) The first limiting member limits the axial displacement and circumferential displacement of the wire cutter relative to the first cavity, so that the bending action section and the rotation action section are arranged adjacent to each other, thereby simplifying the overall structure.

[0111] (4) By providing a second perforation group to cooperate with the rotating operation section, the structure is simple and the rotation stress and bending stress can be dispersed, thereby reducing the risk of the cut wire falling off.

[0112] (5) By providing a second lumen and arranging the second lumen non-collinearly with the first lumen, the force arm of the rotating action section exerting force on the sheath tube is increased, thereby increasing the torque and making it easier to drive the sheath tube to rotate.

[0113] It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other beneficial effects that may be obtained.

[0114] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are suggested in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0115] At the same time, this specification uses specific words to describe the embodiments of this specification. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of this specification can be appropriately combined.

[0116] Similarly, it should be noted that in order to simplify the description disclosed in this specification and thus help understand one or more embodiments, in the above description of the embodiments of this specification, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this specification are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0117] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0118] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. An endoscopic incision device, characterized in that: include: Operations Department; A sheath tube including a first lumen; The shreds are at least partially disposed in the first cavity, the proximal end of the shreds is connected to the operating part, and the distal end of the shreds comprises: A cutting section, the cutting section extending from the side wall of the sheath tube to the outside of the sheath tube; a bending action section, the bending action section being arranged at the distal end side of the cutting section, and the bending action section being configured to drive the distal end of the sheath tube to bend when the operating portion pulls the cutting wire from the distal end to the proximal end; The rotating action section is configured to drive the sheath tube to rotate around the axis of the proximal end of the cutting wire when the operating portion rotates the cutting wire.

2. The endoscopic incision device according to claim 1, characterized in that: The endoscopic cutting device also includes a first limiter, which is arranged in the first cavity. The bending action section is fixed to the first limiter, and the first limiter is used to limit the axial displacement of the bending action section relative to the first cavity.

3. The endoscopic incision device according to claim 2, characterized in that: An axially limiting snap-fit ​​structure is formed between the first limiting member and the inner wall of the first cavity, and the snap-fit ​​structure includes at least one limiting recess and at least one limiting protrusion extending in the circumferential direction, one of the limiting recess and the limiting protrusion is arranged on the outer wall of the first limiting member, and the other is arranged on the inner wall of the first cavity, and the limiting recess and the limiting protrusion are engaged with each other.

4. The endoscopic incision device according to claim 3, characterized in that: The cross-sectional shape of the first limiting member is circular, and the engaging structure includes one or more combinations of a tower-shaped structure, a sawtooth-shaped structure, and a threaded structure.

5. The endoscopic incision device according to claim 2, characterized in that: At least a portion of the cross-sectional shape of the first limiting member is non-circular, and the first limiting member and the first cavity form a circumferential limit.

6. The endoscopic incision device according to claim 2, characterized in that: The first limiting member is configured as a cylinder with a uniform cross section along its axial direction, and the first limiting member is fixed in the first cavity in a manner of interference fit.

7. The endoscopic incision device according to claim 1, characterized in that: The side wall of the first cavity is formed with a first perforation group and at least one second perforation group connected to the outer wall of the sheath tube. The at least one second perforation group is arranged on the distal side of the first perforation group. The first perforation group includes a first hole and a second hole. The cut wire passes through the first hole to the outside of the sheath tube to form the cutting section. The bending action section passes through the second hole to the first cavity. The rotating action section passes through the second perforation group in sequence and is fixed to the first cavity.

8. The endoscopic incision device according to claim 1, characterized in that: The endoscopic incision device also includes a second limiter, which is axially movably arranged in the first cavity, and at least part of the rotating action section is fixed to the second limiter, and the second limiter is used to limit the circumferential displacement of the rotating action section relative to the first cavity.

9. The endoscopic incision device according to claim 8, characterized in that: A circumferentially limiting limiting structure is formed between the second limiting member and the inner wall of the first cavity, and the limiting structure includes at least one recess and at least one protrusion extending along the axial direction, one of the recess and the protrusion is arranged on the outer wall of the second limiting member, and the other is arranged on the inner wall of the first cavity, and the recess and the protrusion cooperate with each other.

10. The endoscopic incision device according to claim 1, characterized in that: The endoscopic incision device also includes a second cavity communicated with the first cavity, the second cavity is non-collinearly arranged with the first cavity, and the rotation action section is located in the second cavity.

11. The endoscopic incision device according to claim 10, characterized in that: The second lumen is parallel to the first lumen, and the rotation action section enters the second lumen and extends toward the distal end of the sheath tube or toward the proximal end of the sheath tube.

12. The endoscopic incision device according to claim 10, characterized in that: The inner diameter of the second cavity is equal to the outer diameter of the rotating action section.

13. The endoscopic incision device according to claim 1, characterized in that: The operating part includes a pulling part and a rotating part, the pulling part is used to control the cutting wire to move from the distal end to the proximal end, the bending action section drives the distal end of the sheath tube to bend, the rotating part is used to control the cutting wire to rotate, and the rotating action section drives the sheath tube to rotate; The rotating portion is connected to the proximal end of the pulling portion; or, the rotating portion and the pulling portion are spaced apart.

14. An endoscope, characterized in that: It comprises an endoscopic incision device as described in any one of claims 1-13.

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