Endoscopic incision device and endoscope

Abstract

The embodiments of this specification provide an endoscopic incision device and an endoscope. The endoscopic incision device comprises: an operating unit; a sheath tube including a first lumen; and a cutting wire, the cutting wire being at least partially disposed within the first lumen, the proximal end of the cutting wire being connected to the operating unit, the distal end of the cutting wire comprising a cutting segment, the operating unit controlling the movement of the cutting wire within the sheath tube to cause the distal end of the sheath tube to bend or rotate, and the cutting segment being capable of forming a tissue-cutting blade by supplying a high-frequency current to the cutting segment.

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 performed under endoscopic retrograde cholangiopancreatography (ERCP) using a high-frequency electrosurgical unit to incise the duodenal sphincter and widen the bile duct opening. During the procedure, after the ERCP procedure is completed, the sheath is gently retracted to bend the distal end into an arch, exposing the incisor. A high-frequency current is then passed through the incisor to incise the sphincter. However, poor control of the pulling force on the incisor can easily lead to breakage or dislocation of the incisor, requiring a high level of operator experience.

[0003] Therefore, it is necessary to provide an endoscope and an incision device thereof to solve the above technical problems. Summary of the Invention

[0004] One or more embodiments of the present specification provide an endoscopic incision device, comprising: an operating part; a sheath tube comprising a first lumen; a cutting wire, the cutting wire being at least partially disposed in the first lumen, the proximal end of the cutting wire being connected to the operating part, the distal end of the cutting wire comprising: a cutting segment, the cutting segment extending from the side wall of the sheath tube outside the sheath tube; a bending action segment, the bending action segment being disposed on 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 cutting wire 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 cutting wire when the operating part rotates the cutting wire.

[0005] In some embodiments, the endoscopic incision device also includes a first limiter, which is arranged 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 constant 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 cutting 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 incision device also includes a second limiter, which is axially movably arranged in the first cavity, and at least a portion of the rotational action section is fixed to the second limiter, and the second limiter is used to limit the circumferential displacement of the rotational 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 axially, one of the recess and the protrusion is provided on the outer wall of the second limiting member, and the other is provided 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-collinear 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 lumen is equal to the outer diameter of the rotational action 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, and the bending action segment drives the distal end of the sheath to bend, and 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 intervals.

[0017] One or more embodiments of the present specification further 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 cutting wire are set separately, so the force applied to the cutting wire control sheath when it bends and the force applied to the cutting wire control sheath when it rotates can be dispersed at different positions of the cutting wire, thereby avoiding excessive stress concentration when the control sheath bends and rotates, and preventing the cutting 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 with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, like numbers represent like structures, wherein:

[0020] Figure 1 is a schematic diagram of an endoscopic incision device according to some embodiments of this 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 incision 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] Figure 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] Figure 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] Figure 11A is based on Figure 10 A partial enlarged view of area B of the endoscopic incision device shown in some embodiments;

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

[0032] Figure 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] Figure 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] Figure 14 is based on Figure 12 Schematic cross-sectional view of an endoscopic cutting device taken along DD shown in some embodiments.

[0035] The accompanying drawings are:

[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. Cutting wire; 310. Cutting section; 320. Bending action section; 330. Rotating action section; 400. Insulating sleeve; 500. First limiting member; 510. Engaging structure; 600. Second limiting member; 610. Limiting structure. DETAILED DESCRIPTION

[0037] To more clearly illustrate the technical solutions of the embodiments of this specification, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this specification. Those skilled in the art can apply this specification to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

[0038] It should be understood that the terms "device," "structure," and / or "module" used herein are a method for distinguishing different components, elements, parts, portions, or assemblies at different levels. However, other terms may be used to replace the terms if they achieve the same purpose.

[0039] As used in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not refer to the singular but also include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus 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 part, a sheath, and a cutting wire. The operating part 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. By passing a high-frequency current through the cutting segment, the papillary sphincter is cut. During the operation, the operator gently pulls the cutting wire through the operating part 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 falling off 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 acting 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 through 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 this specification.

[0043] like Figure 1 As shown, the endoscopic incision device includes an operating 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 arranged at the proximal end of the sheath 200, and the operating part 100 includes a handle (bracelet, hand wheel, etc.) for operating the cutting wire 300, a liner assembly frame 110 connected to the distal end of the handle, a metal electrode 120 arranged on the liner assembly frame 110, and a guide hose 130 arranged between the liner assembly frame 110 and the sheath 200 and other components.

[0046] In some embodiments, at least a portion of the cutting wire 300 is housed within the sheath tube 200, and the proximal end of the cutting wire 300 is connected to the operating portion 100. The operating portion 100 allows an operator to hold and control the cutting wire 300. For example, the operating portion 100 can control the cutting wire 300 to move axially along the sheath tube 200 or rotate about its own axis. 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 is a cross-sectional view of the distal end of an endoscopic incision device according to some embodiments of the present specification. Figure 4 This is a schematic diagram of the distal end of an endoscopic incision 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 axially from the proximal end of the sheath tube 200 to the distal end 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 from the sidewall of the sheath tube 200 outside 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 cutting wire 300 includes a cutting segment 310, a bending segment 320, and a rotating segment 330. In some embodiments, the cutting segment 310, the bending segment 320, and the rotating segment 330 are adjacently disposed on the cutting wire 300. In some embodiments, the cutting segment 310, the bending segment 320, and the rotating segment 330 are spaced apart on the cutting wire 300. It should be noted that the cutting segment 310, the bending segment 320, and the rotating segment 330 may refer to sections of the cutting wire 300 that have corresponding functions, and their edge ends do not have clear boundaries. For example, the bending segment 320 may refer to the section of the cutting wire 300 that drives the sheath 200 to bend, and the rotating segment 330 may refer to the section of the cutting wire 300 that drives the sheath 200 to rotate. Small sections at both ends of these sections that do not have corresponding functions may also be classified as corresponding 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 supplied 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 papillary sphincter, etc.). In some embodiments, the endoscopic cutting device also includes an insulating sleeve 400, at least a portion of the insulating sleeve 400 is arranged outside the sheath 200, a portion of the cutting section 310 is sleeved inside the insulating sleeve 400, and the other portion is exposed outside the insulating sleeve 400, serving 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 portion of the insulating sleeve 400 is arranged in the first lumen 210 of the sheath 200, and the other portion is arranged outside the sheath 200. In other embodiments, the entire insulating sleeve is arranged outside the sheath 200. In some embodiments, the insulating sleeve 400 is wrapped around 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 lumen 210, the insulating sleeve 400 located outside the sheath tube 200 will retract into the first lumen 210.

[0052] In some embodiments, the cutting wire 300 includes a bending section 320. The bending section 320 may refer to the 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 section 320 is disposed distal to the cutting section 310 and is configured to cause 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 cutting wire 300 includes a rotational section 330. The rotational section 330 may refer to the portion of the cutting wire 300 that contacts the sheath tube 200 and applies torque to the sheath tube 200 when the cutting wire 300 rotates about its own axis. In some embodiments, the rotational section 330 may be disposed proximal to the cutting section 310 and / or the bending section 320, or distal to the cutting section 310 and / or the bending section 320. The rotational section 330 is configured to drive the sheath tube 200 to rotate about the axis proximal to the cutting wire 300 when the operating unit 100 rotates the cutting wire 300.

[0054] According to the scheme in the above embodiment, the bending section 320 and the rotation section 330 of the cutting wire 300 are set separately, so 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 stress concentration 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 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 section 320 forms an axial limit with the first lumen 210, so that the distal end of the sheath 200 is bent under the pulling force from the distal end to the proximal end of the operating portion 100. In some embodiments, the bending section 320 and the first lumen 210 are axially limited by, but not limited to, providing a first limiter 500, interference fit, and other methods.

[0057] In some embodiments, the endoscopic incision device further includes a first stopper 500, which is disposed within the first lumen 210. The bending section 320 is fixed to the first stopper 500 and is configured to limit the axial displacement of the bending section 320 relative to the first lumen 210. After the axial displacement of the bending 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, causing the proximal end of the cutting section 310 located outside the sheath 200 to enter the first lumen 210. The bending section 320 then causes the distal end of the sheath 200 to bend into an arch shape. At this point, the cutting section 310 changes from being in contact with the sidewall of the sheath 200 to being spaced apart from the sidewall of the sheath 200, facilitating its use as a blade to cut human tissue.

[0058] In some embodiments, the bending section 320 is fixedly connected to the first position-limiting member 500. In some embodiments, the bending section 320 and the first position-limiting member 500 are integrally formed.

[0059] like Figure 3As shown, in some embodiments, an axially limiting engaging structure 510 is formed between the first stopper 500 and the inner wall of the first lumen 210. The engaging structure 510 includes at least one circumferentially extending concave and at least one circumferentially extending convex. One of the concave and convex is located on the outer wall of the first stopper 500, and the other is located on the inner wall of the first lumen 210. The concave and convex engage with each other. When the concave and convex engage, the first stopper 500 is axially positioned relative to the first lumen 210, thereby enabling the bending section 320 to drive the distal end of the sheath 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 axially at intervals 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 axially at intervals 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 limiting protrusions is located on the inner wall of the first cavity 210, and the remaining limiting protrusions are located on the outer wall of the first limiting member 500; at least one of the limiting recesses is located on the outer wall of the first limiting member 500, and the remaining limiting recesses are located on the inner wall of the first cavity 210. In other embodiments, the limiting protrusions and limiting recesses of the engaging structure 510 can also have other configurations.

[0062] Figure 5 This is a schematic diagram of the structure of the first limiting member 500 shown in some embodiments of this specification. Figure 1 . Figure 6 This is a schematic diagram of the structure of the first limiting member 500 shown in some embodiments of this specification. 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 segment 320 relative to the first lumen 210, but does not limit the circumferential displacement of the bending segment 320 relative to the first lumen 210. In some embodiments, the first stopper 500 has a circular cross-section and is rotatable relative to the first lumen 210. In some embodiments, the bending segment 320 includes the portion from the distal end of the cutting segment 310 entering the sheath 200 to the distal end of the first stopper 500. Due to the circumferential freedom of movement of the first stopper 500 relative to the first lumen 210, the rotation segment 330 can be driven to rotate by the first stopper 500. For example, during surgical operation, when the rotating action section 330 is set at the distal end of the bending action section 320, the operating part 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 section 330 to rotate, so that the rotating action section 330 drives the sheath tube 200 to rotate.

[0064] In some embodiments, the first limiting member 500 is axially limited by 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, and the end with the larger diameter of the tower-shaped structure 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 limiting member 500. In some embodiments, the cross-section of the circular ring includes but is not limited to a triangle, an arc, a quadrilateral, etc.

[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 Schematic cross-sectional view of an endoscopic cutting device taken along AA shown in some embodiments.

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

[0071] like Figures 7 and 8 As shown, in some embodiments, at least a portion of the cross-section 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-section of the first stopper 500 includes, but is not limited to, a triangle, a rectangle, a pentagon, a gear, etc.

[0072] In some embodiments, the first stopper 500 includes an axially limiting snap-fit structure 510 and a circumferentially limiting non-circular cross-sectional portion. Thus, the first stopper 500 limits both the axial displacement of the cut wire 300 relative to the first lumen 210 and the circumferential displacement of the cut wire 300 relative to the first lumen 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 both axially and circumferentially, the distal end of the cutting wire 300 is fixed to the first stopper 500, the bending section 320 includes a portion extending 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 section 330 includes a portion fixed within the first stopper 500. During surgical operation, when the operating unit 100 pulls the cutting wire 300 from the distal end to the proximal end, the cutting wire 300 causes the distal end of the sheath 200 to bend via the bending section 320; when the operating unit 100 causes the cutting wire 300 to rotate, the cutting wire 300 transmits torque to the first stopper 500, which in turn transmits the torque to the sheath 200, causing the sheath 200 to rotate.

[0074] In some embodiments, the first stopper 500 is configured as a cylinder with a constant cross-section along its axial direction. The first stopper 500 is secured within the first cavity 210 via an interference fit. This interference fit enables the first stopper 500 to simultaneously limit the axial and circumferential displacement of the cut wire 300 within the first cavity 210. A cylinder with a constant cross-section refers to a cylinder whose shape and dimensions remain constant at any cross-section along the axial direction of the first stopper 500. In some embodiments, the first stopper 500 includes, but is not limited to, cylindrical, triangular, quadrangular, and pentagonal prisms. Columnar structures are simple to manufacture and cost-effective.

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

[0076] Hereinafter, some exemplary embodiments of the rotation section 330 and its related components (such as the second limiting member 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 action of the torsional force transmitted from the proximal end to the distal end of the operating portion 100, the sheath 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 is inserted into the second perforation group 230 (as described below) multiple times. Figure 9 and its related description) forms 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) provided on the first cavity 210. Figure 10 and Figure 11A 、 11B and its related description) forms 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) Figures 12 to 14 and related descriptions) form a circumferential limit with the first cavity 210.

[0078] Figure 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 sidewall of the first lumen 210 is formed with a first perforation group 220 and at least one second perforation group 230 that communicate with the outer wall of the sheath 200. The at least one second perforation group 230 is disposed distally to the first perforation group 220. The perforation group includes holes that allow the cut wire 300 to pass from the first lumen 210 out of the sheath 200 and holes that allow the cut wire 300 to pass from the outside of the sheath 200 into the first lumen 210.

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

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

[0082] In some embodiments, the rotation section 330 sequentially passes through the second perforation set 230 and is fixed to the first lumen 210. The rotation section 330 includes a section from the position where the cut wire 300 first passes through the second perforation set 230 to the position where the cut wire 300 last passes through the second perforation set 230.

[0083] In some embodiments, the sidewall of the first lumen 210 is formed with one or more second perforation groups 230, each of which includes an exit hole 231 and an entry hole 232. The rotational action segment 330 passes through the exit hole 231 within the first lumen 210 to the outside of the sheath 200, and then passes through the entry hole 232 outside the sheath 200 into the first lumen 210, and continues to pass through the other perforation groups in sequence. The rotational action segment 330 forms a circumferential limit with the first lumen 210 through the second perforation group 230. When the operating unit 100 rotates the shredder 300, the rotational action segment 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 and circumferential directions of the sheath tube 200. This 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 bending stress can be dispersed, thereby reducing the risk of the cut wire 300 falling off.

[0086] Figure 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 . Figure 11A is based on Figure 10 A partial enlarged view of area B of the endoscopic incision device shown in some embodiments. Figure 11B is based on Figure 10 Schematic cross-sectional view of an endoscopic cutting device taken along CC in some embodiments.

[0087] like Figure 10 、 Figure 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 on 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 arranged in the first cavity 210, and at least a portion of the rotating action section 330 is fixed to the second limit member 600. The second limit member 600 is used to limit the circumferential displacement of the rotating action section 330 relative to the first cavity 210.

[0089] In some embodiments, the portion of the shredded wire 300 that penetrates the second stopper 600 constitutes the rotational section 330. When the operating unit 100 controls the shredded wire 300 to rotate, the rotational section 330 drives the second stopper 600 to rotate, and the second stopper 600 drives the sheath 200 to rotate. In some embodiments, the rotational section 330 and the second stopper 600 are integrally formed or fixed by means of a snap connection, adhesive bonding, or the like.

[0090] like Figure 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. The limiting structure 610 includes at least one recess and at least one protrusion extending axially. One of the recess and the protrusion is provided on the outer wall of the second limiting member 600, and the other is provided on the inner wall of the first cavity 210. 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 limiter 600 constitutes a cross-shaped symmetrical structure, and the inner wall of the first cavity 210 includes a protrusion that cooperates with the second limiter 600. When the wire cutter 300 drives the second limiter 600 to rotate, the force applied by the second limiter 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 sheath 200 of the second limiter 600.

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

[0093] Figure 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 . Figure 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 . Figure 14 is based on Figure 12 Schematic cross-sectional view of an endoscopic cutting device taken along DD shown in some embodiments.

[0094] like Figure 3 、 Figures 12 to 14 As shown, in some embodiments, the endoscopic incision device further includes a second lumen 240 in communication with the first lumen 210. The second lumen 240 is non-collinear with the first lumen 210, and the rotational action section 330 is located within the second lumen 240. When the operating portion 100 rotates the cutting wire 300, the rotational action section 330 located in the second lumen 240 can generate torque on the cutting wire 300, causing the sheath 200 to rotate with it. Because the second lumen 240 is non-collinear with the first lumen 210, the force arm through which the rotational action section 330 applies force to the sheath 200 is increased, thereby increasing the torque and making the sheath 200 easier to rotate.

[0095] In some embodiments, the second lumen 240 is parallel to or intersects the first lumen 210 at an angle. For example, the second lumen 240 is perpendicular to the first lumen 210, or the angle between the second lumen 240 and the first lumen 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 rotational section 330. For another example, the length of the second lumen 240 can be greater than the length of the rotational section 330 and less than the axial length of the sheath 200. For another example, the length of the second lumen 240 can be 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, Figure 13 as shown) or extending toward the proximal end of the sheath 200 (as shown Figure 12 shown).

[0098] In some embodiments, a through hole 250 is formed on the sidewall of the second cavity 240 and communicates with the first cavity 210. The shredded wire 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 an end of the second cavity 240. In some embodiments, the through hole 250 is disposed between 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 to the inner wall of the second lumen 240, making it easier to apply the rotational force of the rotating section 330 to the sheath 200 and improve the torque transmission efficiency.

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

[0101] In the following, we will combine the 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 portion 100 includes a pulling portion 140 and a rotating portion 150. For example, the pulling portion 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 segment 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 portion of the cutting wire 300 located outside the sheath tube 200 constitutes a knife portion, which is convenient for cutting human tissue (such as the nipple sphincter). For example, the rotating portion 150 is used to control the rotation of the cutting wire 300, so that the rotating action segment 330 of the cutting wire 300 drives the sheath tube 200 to rotate, making it convenient for the operator to direct the aforementioned knife portion toward the direction to be cut (such as the 11 o'clock direction toward the nipple sphincter). By separately providing the pulling portion 140 and the rotating portion 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 to facilitate operator control. In some embodiments, the rotating portion 150 and the pulling portion 140 are spaced apart. 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 slidably mounted 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 within the sheath 200 .

[0105] In some embodiments, the rotating portion 150 includes a rotating wristband that is rotatably mounted on the proximal end of the operating portion 100 and fixedly connected to the pulling portion 140. When the operator controls the rotating wristband to rotate, the rotating wristband 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 handwheel (not shown) that is mounted on the liner assembly frame 110. The proximal end of the shredded wire 300 passes through the handwheel and cooperates with the handwheel. When the operator controls the handwheel to rotate, the handwheel can drive the shredded wire 300 to rotate about its own axis.

[0106] Some embodiments of the present specification also provide an endoscope, which includes an endoscopic incision 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 cutting wire are set separately, so that the force applied to the cutting wire control sheath when it is bent and the force applied to the cutting wire control sheath when it is rotated can be dispersed at different positions of the cutting wire, thereby avoiding excessive stress concentration on the cutting wire when the control sheath is bent and rotated, and preventing the cutting wire 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 cut wire relative to the first cavity, so that the bending action section and the rotation action section are arranged adjacent to each other, simplifying the overall structure.

[0111] (4) By setting up 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 possible beneficial effects.

[0114] While the basic concepts have been described above, it will be apparent to those skilled in the art that the detailed disclosure is merely illustrative and does not limit this specification. Although not explicitly stated herein, various modifications, improvements, and revisions to this specification may be made by those skilled in the art. Such modifications, improvements, and revisions are suggested in this specification and remain within the spirit and scope of the exemplary embodiments of this specification.

[0115] This specification also uses specific terms to describe the embodiments of this specification. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "one embodiment," "an embodiment," or "an alternative embodiment" two or more times in different locations in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of this specification may be appropriately combined.

[0116] Similarly, it should be noted that, in order to simplify the description of this specification and facilitate understanding of one or more embodiments, the foregoing description of the embodiments of this specification sometimes combines multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this specification requires more features than those recited in the claims. In fact, the features of an embodiment may be fewer than all the features of the individual embodiments disclosed above.

[0117] In some embodiments, numbers are used to describe the quantity of components and attributes. 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 stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required characteristics 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 settings of such numerical values are as accurate as possible within the feasible range.

[0118] Finally, it should be understood that the embodiments described in this specification are intended only to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not 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 described and illustrated in this specification.

Claims

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

2. The endoscopic incision device according to claim 1, wherein: The endoscopic incision 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, wherein: An axially limiting snap-fit structure is formed between the first limiting member and the inner wall of the first cavity. 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. The limiting recess and the limiting protrusion are engaged with each other.

4. The endoscopic incision device according to claim 3, wherein: The cross-section of the first limiting member is circular, and the engaging structure includes one or more combinations of a tower-like structure, a sawtooth-like structure, and a threaded structure.

5. The endoscopic incision device according to claim 2, wherein: The cross-sectional shape of at least a portion 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, wherein: The first limiting member is configured as a column with a constant cross-section along its axial direction, and is fixed in the first cavity in an interference fit manner.

7. The endoscopic incision device according to claim 1, wherein: 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 cutting 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, wherein: 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, wherein: 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, wherein: The endoscopic incision device further includes a second lumen communicated with the first lumen, the second lumen and the first lumen are arranged non-collinearly, and the rotation action section is located in the second lumen.

11. The endoscopic incision device according to claim 10, wherein: 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 extends toward the proximal end of the sheath tube.

12. The endoscopic incision device according to claim 10, wherein: The inner diameter of the second cavity is equal to the outer diameter of the rotation section.

13. The endoscopic incision device according to claim 1, wherein: The operating portion includes a pulling portion and a rotating portion, wherein the pulling portion is used to control the cutting wire to move from the distal end to the proximal end, and the bending action section drives the distal end of the sheath tube to bend; the rotating portion 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 the endoscopic incision device according to any one of claims 1 to 13.

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