CN216675852U - Snare with adjustable catheter - Google Patents

Abstract

The utility model provides a snare with an adjustable catheter, which comprises a catheter body; a handle; a snare member comprising a snare loop, a pull member connected to the snare loop, and a cinch assembly connected to the pull member, wherein the snare loop is inserted into a tube from the handle end and the snare loop is ejected out of the tube; the pipe body is internally provided with a first control piece and a second control piece in a penetrating mode, and the handle is provided with a driving piece for controlling the second control piece to pull the pipe body to be bent. In the use process of the utility model, the second control piece can be pulled by the driving piece, so that the second control piece can guide the pipe body to be bent, and the first control piece can form the elastic force recovered after the pipe body is bent, so that the bending of the pipe body becomes more controllable, and the bending of the pipe body is better controlled.

Description

Snare with adjustable catheter

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to a snare with an adjustable catheter.

Background

Snares are a well established medical device commonly used in clinical procedures, and have been used in many medical procedures, including Endoscopic Mucosal Resection (EMR) and Endoscopic Submucosal Resection (ESR), polypectomy, mucosectomy, and the like, to resect tissue from a target site. The existing snare is difficult to control on bending, and the snare is difficult to guide to bend in use, so that the snare is difficult to reach a required position in a complex pipeline.

SUMMERY OF THE UTILITY MODEL

The utility model addresses the deficiencies of the prior art by providing a snare with an adjustable catheter that is easy to bend.

In order to achieve the above object, the present invention provides a snare with an adjustable catheter, comprising

A pipe body;

a handle;

a snare member comprising a snare loop, a pull member connected to the snare loop, and a cinch assembly connected to the pull member, wherein the snare loop is inserted into a tube from the handle end, and the snare loop is passed out of the tube;

the pipe body is internally provided with a first control piece and a second control piece in a penetrating mode, and the handle is provided with a driving piece for controlling the second control piece to pull the pipe body to be bent.

In the use process of the utility model, the second control piece can be pulled by the driving piece, so that the second control piece can guide the pipe body to be bent, and the first control piece can form the elastic force recovered after the pipe body is bent, so that the bending of the pipe body becomes more controllable, and the bending of the pipe body is better controlled.

Optionally, a square pipe is arranged on the pipe body, a first connecting pipe and a second connecting pipe which are connected with the pipe body are arranged on the square pipe, the hoop ring is inserted into the guide pipe from the second connecting pipe, and the driving piece is arranged on the square pipe.

Optionally, a rotating shaft is further arranged on the driving piece, the second control piece is partially wound on the driving piece, the rotating shaft is rotatably connected with the inner wall of one side of the square pipe, and a gap is formed between the rotating shaft and the inner wall of the other side of the square pipe.

Optionally, a positioning piece is further arranged on the square pipe, a shaft is arranged on the positioning piece, a sliding through groove is formed in the square pipe, and the shaft is arranged in the sliding through groove in a penetrating mode.

Optionally, the shaft is provided with a positioning abutting block abutted against the outer wall of the square pipe.

Optionally, the tightening assembly includes a square tube, a screw member disposed on the pulling member, and a screw tube disposed on the screw member, wherein a sealing member for fixing the pulling member is disposed on the screw member.

Optionally, the pipe body includes composite weaving layer and inner liner, hydrophilic coating has been scribbled on the composite weaving layer.

Optionally, the composite woven layer is formed by spirally winding a plurality of metal wires with each other.

In summary, in the process of using the present invention, the driving member can pull the second control member, so that the second control member can guide the bending of the tube body, and the first control member can form the elastic force for restoring the bent tube body, so that the bending of the tube body becomes more controllable, and the bending of the tube body is better controlled.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a cross-sectional view of the handle portion at a-a of fig. 2.

Fig. 4 is a sectional view in another direction in fig. 4.

Fig. 5 is a cross-sectional view of the portion of the snare loop of fig. 1.

Fig. 6 is an exploded view of fig. 1.

Fig. 7 is an exploded view of the handle portion of fig. 6.

Fig. 8 is a schematic view of the snare loop and pull member portions of fig. 6.

Fig. 9 is a schematic structural view of the composite braid in the tubular body.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Referring to fig. 1-9, a snare with an adjustable catheter comprises a tube body 1, a handle 2, and a snare unit 3, wherein the snare unit 3 and the handle 2 are respectively disposed at the fore and aft ends of the tube body 1. The body 1 is multilayer structure, and body 1 includes hydrophilic coating, composite braid and inner liner, and wherein hydrophilic coating is for coating the tubular structure on composite braid or the cover is established on composite braid 11 on composite braid, and such composite braid 11 sets up between hydrophilic coating and inner liner 12, and wherein inner liner 13 is made for common rubber material on the market.

The composite braid 11 is formed by spirally winding a plurality of metal wires, as shown in fig. 9, so that the tube body 1 has good bending and springback capabilities under the action of the composite braid, and the tube body 1 is more highly operable when the tube body 1 is guided to be bent.

Further, a necking portion 101 is provided at an end portion of the pipe body 1, the entire necking portion 101 is provided in a tapered shape, and the ring set 3 is provided in the necking portion 101, wherein the necking portion 101 is formed by shrinking the composite braid 11.

Specifically, the snare 3 includes a snare loop 31, a pulling member 32 and a tightening assembly, wherein the snare loop 31 is a wire-shaped metal having two free ends and has a certain resilience, the pulling member 103 is a sleeved structure covering the two free ends of the snare loop 31, and the snare 103 is made of polyethylene material.

Therefore, after the hoop ring is pulled to be folded into the pipe body 1, the hoop ring 31 can be shrunk under the constraint of the pipe body 1; after the snare loop 31 is pushed out of the tube body 1, it will expand under the effect of the elasticity.

Wherein, one end of the pulling part 32 is connected with the snare loop 31, the other end passes through the tube body 1 and penetrates out of the handle 2 to be connected with the tightening component, the tightening component comprises a square tube 22, a screw part 23 and a screw tube 24,

wherein, square pipe 22 and handle 2 are all equipped with the passageway that supplies to draw and move the piece 32 and pass, the tip of drawing the piece 32 is connected and is linked to each other with spiral piece 23 after wearing out from square pipe 22, the surface of spiral piece 23 has the friction pattern, spiral piece 23 has the passageway that supplies to draw the piece 32 to pass, and be equipped with sealing member 231 at the tip of spiral piece 23, sealing member 231 is spiral piece 23 tip rubber support piece, sealing member 231 and the piece 32 butt of drawing, so can play the effect of fixed drawing the piece 32, further, draw the piece 32 after passing spiral piece 23, still be connected with spiral pipe 24, so draw spiral pipe 24, can guide the shrink of circle external member 3.

The traditional snare is not easy to control the bending of the snare in the using process, and is inconvenient in use.

Specifically, the head and the tail of the pipe body 1 are both provided with the fixing blocks 41, the fixing blocks 41 are connected with the inner wall of the pipe body 1, and then the fixing blocks are fixed at the head and the tail of the pipe body 1, the fixing shell 102 is connected with the fixing blocks 41, and the fixing shell 102 is arranged on the inner wall of the pipe body 1.

Further, the pipe body 1 is provided with a first control piece 42 and a second control piece 43 in a penetrating mode, the first control piece and the second control piece are both elastic steel wires, the fixing block 41 is further provided with a through hole, and the first control piece and the second control piece penetrate through the through hole.

Wherein, the head and the tail of the first control member 42 have annular protrusions 421, so that the head and the tail of the first control member 42 are mutually abutted with the fixing block 41.

The second controlling member 43 is provided with a protrusion 431 at an end close to the throat 101 so that the protrusion 431 and the fixing block 41 are abutted against each other, and when the second controlling member 43 is pulled, the pipe body 1 can be guided to be bent.

Specifically, the handle 2 is provided with a square pipe 21a, one end of the square pipe 21a is provided with a first connecting pipe 201, the other end of the square pipe 21a is provided with a second connecting pipe 202, the square pipe 21a is integrally arranged in a hollow mode, the first connecting pipe 201 is connected with the pipe body 1, the second connecting pipe 202 is arranged at the top end of the square pipe 21a, the ring sleeve member 3 can insert the ring sleeving ring 31 into the square pipe 21a from the second connecting pipe 21, then the ring sleeving ring 31 enters the pipe body 1 from the second connecting pipe 202 of the square pipe 21a, and then the ring sleeving ring 31 comes out from the necking part 11.

The square tube 21a is further provided with a driving member 22a, the driving member 22a is disposed on the inner wall of the square tube 21a through a rotating shaft 23a, and the rotating shaft 23a does not penetrate through the whole square tube 21a, so as to ensure that the ferrule 31 can pass through the square tube.

The driving member 22a is provided with a gear at its edge, and the portion of the driving member 22a provided with the gear at its edge is passed through the square tube 2a, so that the driving member 22a can be rotated from the side of the square tube 21 a. Further, the end of the second control member 43 is wound on the rotating shaft 23a, and the rotating driving member 22a can pull the second control member 43, so as to control the bending of the pipe body 1.

For convenience, the driving member 22a is locked to control the bending of the pipe body 1 at a proper angle.

Still be equipped with the setting element 24a on the square pipe 21a, the direction that the setting element 24a arranged is mutually perpendicular with the direction that driving piece 22a arranged, be equipped with axle 25a on the setting element 24a, this axle 25a usually is for running through whole square pipe 21a to be equipped with slip logical groove 211a on square pipe 21a, the end of axle 25a is equipped with the location and supports piece 251a, promote location and support piece 251a so, can promote setting element 24a to the position with the mutual butt of driving piece 22a, thereby play the effect of locking driving piece 22 a.

It is to be understood that the described embodiments are merely a few embodiments of the utility model and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (8)

1. A snare with an adjustable catheter is characterized by comprising

A pipe body;

a handle;

a snare member comprising a snare loop, a pull member connected to the snare loop, and a cinch assembly connected to the pull member, wherein the snare loop is inserted into a tube from the handle end and the snare loop is ejected out of the tube;

the pipe body is internally provided with a first control piece and a second control piece in a penetrating mode, and the handle is provided with a driving piece for controlling the second control piece to pull the pipe body to be bent.

2. A snare according to claim 1, wherein the tube has a square tube, the square tube has a first connection tube and a second connection tube connected to the tube, the snare loop is inserted into the catheter from the second connection tube, and the driving member is provided on the square tube.

3. A snare according to claim 2, wherein a rotation shaft is further provided on the driving member, the second control member is partially wound around the driving member, and the rotation shaft is rotatably connected to one inner wall of the square tube and has a gap with the other inner wall of the square tube.

4. A snare according to claim 3, wherein the square tube is further provided with a positioning member, the positioning member is provided with a shaft, the square tube is provided with a sliding through groove, and the shaft is inserted into the sliding through groove.

5. A snare according to claim 4, wherein a positioning block is provided on the shaft to abut against the outer wall of the square tube.

6. A snare according to claim 1, wherein the cinch assembly includes a square tube, a threaded member on the pull member, and a threaded tube on the threaded member, wherein a seal is provided on the threaded member to secure the pull member.

7. A snare with an adjustable catheter according to claim 1, wherein the tube body includes a composite woven layer with a hydrophilic coating applied thereon and an inner liner layer.

8. A snare having an adjustable catheter according to claim 7, wherein the composite braid is formed by a plurality of wires helically wound around each other.

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