CN116725633A

CN116725633A - Cold cutting snare

Info

Publication number: CN116725633A
Application number: CN202310647819.6A
Authority: CN
Inventors: 郭明文
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2023-09-12

Abstract

The application relates to the technical field of medical instruments, in particular to a cold cutting snare which comprises a driving assembly, a first flexible connecting pipe, a second flexible connecting pipe and a snare assembly, wherein the driving assembly is used as a control mechanism for reciprocating movement to control the cold cutting snare to work, and the first flexible connecting pipe is fixedly connected to one end of the driving assembly. The application has the following advantages: through arranging the second flexible connecting pipe capable of moving back and forth, the cutting mechanism arranged at the pipe end side of the first flexible connecting pipe can be hidden or exposed, the cutter can be prevented from damaging equipment or human tissues during hiding, and the cutting mechanism can be matched with a snare loop for cutting during exposing, so that the cutting quality and the cutting speed are improved; through set up the cockscomb structure spacer on first constriction, make it behind the snare treat the cutting polyp, when contracting, the sawtooth on the spacer can insert the polyp lateral wall to a certain extent to realize the location, avoid the snare ring slippage, guarantee the cutting abundant.

Description

Cold cutting snare

Technical Field

The application relates to the technical field of medical appliances, in particular to a cold cutting snare.

Background

In recent years, with the development of medical instruments and the progress of operation techniques, endoscopic gastrointestinal surgery has been increasingly used. The endoscope loop device is one of the endoscopic electric cutting instruments with the earliest application time and the widest application range, and can be used for cutting the bulge lesions, the pedicel lesions and the flat lesions of different parts.

The snare is one commonly used surgical instrument for EMR, which includes a cold snare and a hot snare. Thermal snares cut by providing a high frequency power source to energize when in use, however conventional electrical snares resect polyps, often with the risk of perforation, intrA-And post-operative bleeding and burning of the patient, while the polyp tissue resected by the electrical snares is burned, making adequate histological examination difficult. The cold snare is not electrified even when in use, and only cuts by the cutting force of the snare itself, so that the risk of burning tissues and burning patients can be effectively avoided.

However, the existing cold loop snare has weaker cutting force than the hot loop snare, and the outer part of the cutter is easy to deform when grabbing a large polyp, so that the problem of incapability of cutting is solved, and the outer wall of the polyp is slippery, so that the cutter is difficult to take, and the cutter is possibly incomplete.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. To this end, it is an object of the present application to propose a cold cut snare which is reliable to take, cut quickly, smoothly, and with high safety.

In order to solve the technical problems, the technical scheme provided by the application is as follows: a cold cut snare comprising:

a driving assembly as a control mechanism for reciprocating movement;

the first flexible connecting pipe is fixedly connected to one end of the driving assembly, and a cutting mechanism is detachably connected to one side, away from the driving assembly, of the first flexible connecting pipe;

the second flexible connecting pipe is sleeved on the outer side of the first flexible connecting pipe and can reciprocate along the axial direction of the first flexible connecting pipe, so that the cutting mechanism is completely hidden or partially exposed;

the snare assembly comprises a metal wire inserted into the hollow part of the first flexible connecting pipe and extending to one side of the driving assembly and a snare loop connected with the metal wire, the metal wire is connected with the end part of the driving assembly, the snare loop is arranged at one end of the metal wire away from the driving assembly and driven by the driving assembly to move, so that the snare loop is contracted under the cooperation of the first flexible connecting pipe, and a positioning mechanism is arranged on the snare assembly and used for assisting the snare assembly to cut.

Preferably, the driving assembly comprises a fixed pipe which is arranged in a hollow mode, a first pull ring is fixedly arranged at one side end portion of the fixed pipe away from the first flexible connecting pipe, a traction pipe which axially slides along the hollow portion of the fixed pipe is arranged at the end portion of the fixed pipe, the snare assembly is detachably connected with the end portion of the traction pipe, at least one sliding groove which is arranged along the axial direction of the fixed pipe is formed in the side wall of the fixed pipe, and a second pull ring which penetrates through the sliding groove is arranged in the side wall of the traction pipe, and the push-pull effect of the snare assembly is achieved through the cooperation of the first pull ring and the second pull ring.

Preferably, the end face of one side of the first flexible connecting pipe far away from the driving assembly is arranged in an arc shape.

Preferably, the cutting mechanism comprises a cutter detachably arranged on the first flexible connecting pipe, and the cutter is arranged on a side wall away from the driving assembly.

Preferably, the snare loop is pear-shaped in shape.

Preferably, the snare loop comprises a first constriction and a second constriction, the second constriction being disposed between the first constriction and the wire.

Preferably, the cross section of the first constriction part is U-shaped, and two ends of the second constriction part are respectively and smoothly connected with the first constriction part and the metal wire.

Preferably, the positioning mechanism comprises a positioning sheet arranged on the first contraction part, and the positioning sheet is arranged on the side wall of the first contraction part close to one side of the snare loop area and is perpendicular to the side wall.

Preferably, the positioning sheet is arranged in a zigzag manner.

Preferably, the connecting part which is arranged on the outer wall of the first flexible connecting rod and is concavely arranged on one side of the driving mechanism is provided with threads on the side wall of the connecting part, the connecting part is connected with an annular connecting block in a threaded manner, the second flexible connecting pipe is connected with the annular connecting block and realizes reciprocating motion along with the annular connecting block, the annular connecting block moves along the axial direction of the annular connecting block in the connecting part, and the connecting part plays a limiting role on the annular connecting block.

After adopting the structure, the application has the following advantages: according to the application, the second flexible connecting pipe capable of moving back and forth is arranged, so that the cutting mechanism arranged at the pipe end side of the first flexible connecting pipe can be hidden or exposed, the cutter can be prevented from damaging equipment or human tissues during hiding, and the cutting can be performed by matching with the snare loop during exposing, so that the cutting quality and the cutting speed are improved; the sawtooth-shaped locating piece is arranged on the first contraction part, so that after the polyp to be cut is sleeved with the sawtooth-shaped locating piece, when the polyp is contracted, the sawtooth-shaped locating piece can be inserted into the side wall of the polyp to a certain extent, thereby realizing the locating, avoiding slipping of the sleeved ring and ensuring the full cutting; the device has the advantages of compact structure, convenient adjustment and high safety, and can rapidly cut large polyps.

The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will become apparent by reference to the drawings and the following detailed description.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present application.

FIG. 2 is a schematic cross-sectional view of the structure of A-A in FIG. 1 according to the present application.

Fig. 3 is an enlarged schematic view of the structure of B in fig. 2 according to the present application.

Fig. 4 is an enlarged schematic view of the structure of fig. 2C according to the present application.

Figure 5 is a schematic view of a cutting knife according to the present application.

Fig. 6 is a schematic diagram of a cutter according to the present application.

Figure 7 is a schematic view of a cutter according to the present application.

As shown in the figure: 1. a fixed tube; 2. a first pull ring; 3. a second pull ring; 4. a traction tube; 5. a wire; 6. a first flexible connection tube; 7. a second flexible connection tube; 8. a collar; 9. a chute; 10. a positioning sheet; 11. an annular connecting block; 12. a connection part; 13. and (5) a cutter.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In combination with fig. 1-4, the cold cutting snare comprises a driving assembly, a first flexible connecting pipe 6, a second flexible connecting pipe 7 and a snare assembly, wherein the driving assembly is used as a reciprocating control mechanism to control the cold cutting snare to work, the first flexible connecting pipe 6 is fixedly connected with one end of the driving assembly, one side of the first flexible connecting pipe 6, which is far away from the driving assembly, is detachably connected with a cutting mechanism, the second flexible connecting pipe 7 is sleeved outside the first flexible connecting pipe 6 and can do reciprocating movement along the axial direction of the first flexible connecting pipe 6, the cutting mechanism is enabled to completely hide or partially expose, the snare assembly comprises a hollow part which is inserted into the first flexible connecting pipe 6 and extends to one side of the driving assembly, and a snare loop 8 which is connected with the wire 5, the snare loop 8 is elastic and is in a pear shape, the snare loop 8 comprises a first contraction part and a second contraction part, the second contraction part is arranged between the first contraction part and the wire 5, two ends of the second contraction part are respectively and smoothly connected with the first contraction part and the wire 5, the end of the wire 5 and the driving assembly are connected with one end of the driving assembly, and the snare loop 8 is far away from the driving assembly, and the snare loop 8 is matched with the driving assembly, so that the snare loop 5 is matched with the driving assembly, and the snare loop 5 is used for realizing the positioning of the snare assembly.

The drive assembly includes fixed pipe 1 that the cavity set up, one side tip fixed that fixed pipe 1 kept away from first flexible connecting pipe 6 is equipped with first pull ring 2, one side terminal surface that drive assembly was kept away from to first flexible connecting pipe 6 is circular-arc setting, be equipped with at the well of fixed pipe 1 along its axial gliding traction tube 4, the snare subassembly can be dismantled with the tip of traction tube 4 and be connected, at least, set up a spout 9 that sets up along its axial direction on the lateral wall of fixed pipe 1, be equipped with the second pull ring 3 that runs through spout 9 setting on the lateral wall of traction tube 4, realize the push-pull effect to the snare subassembly through first pull ring 2 and the cooperation of second pull ring 3.

The cutting mechanism comprises a cutter 13 detachably arranged on the first flexible connecting pipe 6, the cutter 13 is arranged on the side wall of one side far away from the driving component, a mounting groove is formed in the end face of the first flexible connecting pipe 6, and the cutter 13 is provided with a V-shaped blade with one or two bevel edges by inserting the cutter into the mounting groove to realize detachable connection, as shown in fig. 5-7.

The positioning mechanism comprises a positioning sheet 10 arranged on the first contraction part, the positioning sheet 10 is arranged on the side wall of one side of the surrounding area of the collar 8 of the collar of the first contraction part and is perpendicular to the side wall, and the positioning sheet 10 is arranged in a zigzag manner.

The connecting part 12 which is arranged in a concave manner is arranged on the outer wall of the first flexible connecting rod and is close to one side of the driving mechanism, threads are formed on the side wall of the connecting part 12, an annular connecting block 11 is connected to the connecting part 12 in a threaded manner, the second flexible connecting pipe 7 is connected with the annular connecting block 11 and moves back and forth along with the annular connecting block 11, the annular connecting block 11 moves axially in the connecting part 12, the connecting part 12 plays a limiting role on the annular connecting block 11, when the cutter is not working, the annular connecting block 11 is arranged on one side, far away from the driving mechanism, of the connecting part 12, one side, far away from the driving mechanism, of the second flexible connecting pipe 7 is covered on the outer side of the cutting mechanism, so that the cutting mechanism is hidden, the cutter 13 is located on the inner side of the second flexible connecting pipe 7 and is 1mm away from the end face of the cutter, human body tissues or equipment is prevented from being accidentally injured by the cutter 13, and when the cutter 13 is rotated to one side, close to the driving mechanism, and the cutter 13 is located on the outer side of the second flexible connecting pipe 7 and 1mm away from the end face of the cutter.

Working principle:

when the device is used, the second flexible connecting pipe is screwed to one side of the connecting part far away from the driving mechanism before the device is inserted into a human body, so that the cutter is received in the second flexible connecting pipe, the snare loop is moved to the position of the polyp to be cut through the endoscope, the second flexible connecting pipe is screwed to one side of the connecting part near the driving component, the cutter can be exposed, the snare loop is sleeved on the outer wall of the polyp, the traction pipe is pulled through the cooperation of the first pull ring and the second pull ring, the traction is realized on the metal wire, the snare loop is moved to one side of the first flexible connecting pipe, the serrated locating piece is inserted into the outer wall of the polyp, the snare loop can be limited, the snare loop is prevented from sliding upwards, the cutter is matched with the cutter arranged at the end part of the first flexible connecting pipe, and after the snare loop is completely received in the first flexible connecting pipe, the complete cutting of the polyp can be performed at the position.

The application and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the application as shown throughout. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present application.

Claims

1. A cold cut snare, comprising:

a driving assembly as a control mechanism for reciprocating movement;

2. The cold cut snare of claim 1, wherein: the driving assembly comprises a fixed pipe which is arranged in a hollow mode, a first pull ring is fixedly arranged at one side end portion of the fixed pipe away from the first flexible connecting pipe, a traction pipe which axially slides along the hollow portion of the fixed pipe is arranged at the end portion of the fixed pipe, the snare assembly is detachably connected with the end portion of the traction pipe, at least one sliding groove which is arranged along the axial direction of the fixed pipe is formed in the side wall of the fixed pipe, and a second pull ring which penetrates through the sliding groove is arranged in the side wall of the traction pipe, and the push-pull effect of the snare assembly is achieved through the cooperation of the first pull ring and the second pull ring.

3. The cold cut snare of claim 2, wherein: the end face of one side of the first flexible connecting pipe, which is far away from the driving assembly, is arranged in an arc shape.

4. A cold cut snare according to claim 3, wherein: the cutting mechanism comprises a cutter detachably arranged on the first flexible connecting pipe, and the cutter is arranged on a side wall far away from the driving assembly.

5. The cold cut snare of claim 4, wherein: the shape of the ring lantern ring is pear-shaped.

6. The cold cut snare of claim 5, wherein: the snare loop includes a first constriction and a second constriction, the second constriction being disposed between the first constriction and the wire.

7. The cold cut snare of claim 6, wherein: the cross section of the first contraction part is U-shaped, and two ends of the second contraction part are respectively and smoothly connected with the first contraction part and the metal wire.

8. The cold cut snare of claim 7, wherein: the positioning mechanism comprises a positioning sheet arranged on the first contraction part, and the positioning sheet is arranged on the side wall of the first contraction part close to one side of the ring sleeve encircling area and is perpendicular to the side wall.

9. The cold cut snare of claim 8, wherein: the locating pieces are arranged in a zigzag mode.

10. The cold cut snare of claim 9, wherein: the connecting device comprises a first flexible connecting rod, a connecting part which is arranged on the outer wall of the first flexible connecting rod and is concave towards one side of the driving mechanism, threads are formed on the side wall of the connecting part, an annular connecting block is connected to the connecting part in a threaded mode, the second flexible connecting pipe is connected with the annular connecting block and moves in a reciprocating mode along with the annular connecting block, the annular connecting block moves axially in the connecting part, and the connecting part plays a limiting role on the annular connecting block.