Multifunctional snare under endoscope

Abstract

The invention belongs to the technical field of endoscopic surgical instruments, and provides a multifunctional snare under an endoscope. A multifunctional snare under an endoscope comprises a snare metal wire, a wire guide mechanism and an endoscope cap, the wire guide mechanism is located in the endoscope cap and comprises at least two layers of guide sleeves which are mutually nested, the guide sleeves comprise a second guide sleeve and a first guide sleeve in the second guide sleeve, and the snare metal wire is fixed to the first guide sleeve. The snare metal wire is located in the second guide sleeve and can move relative to the second guide sleeve. The purpose of the invention is to timely recover polyp specimens and avoid medical disputes. The operation time is shortened, and the operation safety is improved; composite operations such as cutting, hemostasis and foreign matter removal are integrated, and the use and replacement time of surgical instruments is shortened; the head size of the snare is controlled, the influence on passing through an endoscope forceps channel is avoided, and the snare is suitable for anatomical bending parts needing smaller diameters, such as stomach fundus and colon hepatic curvature.

Description

Technical Field

[0001] The invention relates to the technical field of endoscopic surgical instruments, and in particular provides an endoscopic multifunctional snare. Background Art

[0002] In the field of endoscopic surgery, endoscopic mucosal resection (EMR) is often required for the treatment of tracheal polyps, colon polyps, gastric fundus polyps, etc., especially in the treatment of colon polyps. Use a snare to trap the protruding polyp, perform endoscopic electroresection, then withdraw the snare, use endoscopic negative pressure to aspirate it out, or replace the biopsy forceps to remove the polyp to recover the specimen, and then use a disposable titanium clip to seal the wound. However, such operations often have the following shortcomings in clinical treatment: 1. During the endoscopic negative pressure aspiration process, the specimen may be lost due to intestinal peristalsis, long endoscopic tubes, etc., and pathological examination cannot be performed; 2. In special anatomical sites such as the descending duodenum, due to the influence of gravity, the specimen removed by endoscopic EMR is more likely to fall into the distal duodenum, resulting in failure of specimen recovery; 3. During the entire treatment process, the cooperating assistant needs to replace the endoscopic accessories, which takes a long time and leads to a longer operation time. Prior art CN114569234A discloses a multifunctional snare for endoscopic surgery, comprising: a handle, an outer sheath, an inner sheath, an electrocautery snare and a clamp, the handle is provided with a slidable first slider and a second slider, the inner sheath is inserted into the outer sheath, the outer sheath and the inner sheath are both provided on the handle, the clamp is provided at the free end of the inner sheath, the electrocautery snare is sleeved on the outside of the inner sheath, the first slider is connected to the clamp through a first operating member, the second slider is connected to the clamp through a second operating member, the first operating member is located in the inner sheath, and the second operating member is located between the outer sheath and the inner sheath. The inventor believes that there is a large room for improvement in the prior art. Summary of the invention

[0003] The purpose of the present invention is to be able to recover the specimen in time, avoid the displacement and loss of the polyp specimen during the assistant's change of operating instruments, avoid medical disputes; shorten the total time of the operation, the interval time between surgical cutting and hemostasis, and improve the safety of the operation. Secondly, the complex operations such as cutting, hemostasis, and foreign body removal are integrated to reduce the use and replacement time of surgical instruments; control the head volume of the snare to avoid affecting the passage through the endoscopic forceps channel and being suitable for anatomical curved parts such as the fundus of the stomach and the hepatic flexure of the colon that require a smaller diameter. To this end, the present invention provides an endoscopic multifunctional snare, including a snare wire, a guide wire mechanism, and an endoscope cap, the guide wire mechanism is located inside the endoscope cap, the guide wire structure includes at least two layers of mutually nested guide sleeves, the guide sleeves include a second guide sleeve and a first guide sleeve inside the second guide sleeve, the snare wire is fixed to the first guide sleeve, the snare wire is located inside the second guide sleeve, and the snare wire can move relative to the second guide sleeve. The snare wire and the material properties of the wire itself are wrapped with multiple layers of nested guide sleeves to ensure that the snare wire returns to the preset shape after passing through the narrow cavity; to avoid the wear of the surface coating of the snare wire after deformation, which may cause leakage risk; the second guide sleeve is used to send the snare wire to the electrocute area, the first guide sleeve controls the extension and retraction of the snare wire, the snare wire can move relative to the second guide sleeve, and the snare wire can be retracted after the work is completed, which is conducive to integrating the hemostasis and foreign body removal functions and avoiding mutual interference between the instruments. It should be noted that the first guide sleeve and the second guide sleeve are insulating biocompatible plastics.

[0004] Preferably, a first through hole is provided on the side wall of the first guide sleeve, the snare wire includes a moving portion, the moving portion passes through the first through hole, and the snare wire also includes a working portion, the working portion extends along the extension direction of the guide sleeve. The moving portion is used to control the snare wire and the first guide sleeve to extend from the inside of the second guide sleeve, and the working portion is used to control the extension length of the snare wire, so as to snare the polyp and control the tightening force of the snare.

[0005] Preferably, a separation mechanism is provided on the outside of the first guide sleeve, and the separation mechanism can change the working state with the relative movement of the first guide sleeve and the second guide sleeve, and the separation mechanism separates the endoscope cap and the snare wire. The separation mechanism is used to separate the endoscope cap and the extended snare wire, so as to avoid the contact of the remaining structures of the present invention with the snare wire during the electric cutting process of the snare wire, causing leakage and medical accidents. Secondly, the separation mechanism can prevent the polyp specimen from leaving the electric cutting area due to the influence of gravity and intestinal peristalsis after removal. After the polyp specimen stops moving, the separation mechanism and the snare wire are retracted, and the remaining structures are used to clamp the polyp specimen.

[0006] Preferably, the separation mechanism includes a hard bracket and a blocking net, the hard bracket is connected to the first guide sleeve, the blocking net is covered and fixed on the outside of the hard bracket, the inner ring of the blocking net is connected to the first guide sleeve, and the outer ring of the blocking net is provided with an elastomer. A hard support is used to connect the first guide sleeve, and an elastic body is provided on the outer ring of the blocking net. When the blocking net leaves the second guide sleeve, the elastic body recovers according to its own elasticity, and the hard support opens according to the recovery of the elastic body to form a blocking body with the blocking net, separating the electrocuting position of the snare wire from the other components of the present invention; after the electrocuting is completed, the excised polyp tissue will move due to factors such as gravity and intestinal peristalsis, and the blocking body formed by the hard support and the blocking net has a blocking effect on the polyp tissue, and the snare wire and the separation mechanism can be retracted after the polyp tissue stops, so as to avoid the loss of the polyp tissue; because the separation mechanism is opened by the elastic body, the opening degree of the elastic body can be adaptively adjusted according to the spatial size of the electrocuting area, so as to avoid the separation mechanism from causing damage to the surrounding tissue after opening in the electrocuting area; preferably, the blocking net can be made of a transparent plastic film, and the transparent material can avoid the blocking net blocking the operating field of view after the separation mechanism is opened, so as to facilitate the observation of whether the snare is clamped and tightened the polyp tissue pedicle.

[0007] Preferably, the hard stent includes at least three hard wires, the hard wires are located between the first guide sleeve and the second guide sleeve, the blocking net is covered and fixed on the outside of the hard wires, and one end of the hard wires is fixed to the first guide sleeve. The hard stent uses hard wires, and the diameter of the filamentary structure is small, which is convenient for setting the hard stent between the first guide sleeve and the second guide sleeve to control the overall diameter of the present invention; preferably, the hard wire can be made of metal materials such as nickel-titanium alloy to avoid deformation of the hard wire when passing through a narrow channel. At the same time, the hard wire can have a certain strength to form a blocking body with the blocking net to block the polyp tissue after cutting and falling.

[0008] Preferably, the blocking net is fan-shaped, and the hard wires are evenly distributed at angles on the inner surface of the blocking net. The central angle of the blocking net fan is between 180° and 330°, and the fan-shaped notch of the blocking net is located at the top, allowing other surgical instruments to pass through the top of the present invention, while retaining the blocking effect of the blocking net on polyp tissue and the effect of separating the snare wire electrocuting area and other structures of the present invention.

[0009] Preferably, the elastic body cooperates with the inner diameter of the second guide sleeve when it is in a contracted state; when the elastic body is in an expanded state, the hard wire and the first guide sleeve have an angle α. Before the snare wire is extended, the elastic body is located inside the second guide sleeve, ensuring that the present invention can smoothly pass through a narrow passage. At the same time, because the elastic body is inside the second guide sleeve, it can open the second guide sleeve and separate the snare wire and the second guide sleeve, avoiding the snare wire from being deformed when passing through a narrow passage; at the same time, because the elastic body is inside the second guide sleeve, after the snare wire is retracted into the second guide sleeve, the elastic body squeezes the inner wall of the second guide sleeve with a large friction force, and the snare wire can only be extended under the operation of the operator, which can avoid the snare wire from extending from the second guide sleeve due to unexpected situations such as vibration.

[0010] Preferably, the endoscopic multifunctional snare also includes a clamping body mechanism, which is located outside the second guide sleeve. The clamping body mechanism includes at least two clamps, which include a detachable clamping body and a fixed clamping body. The detachable clamping body is located at the front end of the fixed clamping body. A separation mechanism is provided between the detachable clamping body and the second guide sleeve. A semi-through groove is provided at the front end of the endoscope cap, and the groove width of the semi-through groove matches the width of the detachable clamping body. The clamp mechanism and the snare wire are coaxially arranged to avoid the integration of multiple functions resulting in an excessively large diameter of the endoscope cap, which would affect the insertion of the endoscope and make it impossible to operate on anatomical curved parts that require a smaller diameter, such as the gastric fundus and the hepatic flexure of the colon; and the clamp mechanism is fixed on the outside of the second guide sleeve, so there is no need for the snare wire to be completely withdrawn from the snare. When the wire is retracted into the second guide sleeve, the operation can be performed, and the detachable clamp is used to immediately clamp and stop bleeding at the electrocute position, shortening the operation time for changing instruments to stop bleeding at the electrocute position and improving the success rate of the operation; after the detachable clamp clamps the electrocute position, the detachable clamp is separated from the second guide sleeve by the separation mechanism, and the fixed clamp is used to clamp the polyp specimen previously retained and then withdrawn. Compared with the traditional method of reinserting the endoscopic clamp after withdrawal, the time for replacing surgical instruments is shortened and the loss of polyp specimens is avoided.

[0011] The present invention can realize timely specimen recovery, avoid displacement and loss of polyp specimens during the assistant changing operating instruments, and avoid medical disputes; shorten the total operation time, the interval time between surgical cutting and hemostasis, improve the safety of the operation, and have the following beneficial effects: integrate complex operations such as cutting, hemostasis, and foreign body removal, and reduce the use and replacement time of surgical instruments; control the head volume of the snare to avoid affecting the passage through the endoscopic forceps channel and being suitable for anatomical curved parts such as the gastric fundus and the hepatic flexure of the colon that require a smaller diameter; use a multi-layer nested guide sleeve to wrap the snare wire and the material properties of the wire itself to ensure that the snare wire returns to a preset shape after passing through the narrow cavity; avoid the surface coating of the snare wire from being worn after deformation, resulting in the risk of leakage; the second guide sleeve is used to send the snare wire to the electrocute area, the first guide sleeve controls the extension and contraction of the snare wire, and the snare wire can move relative to the second guide sleeve, which is conducive to integrating the hemostasis and foreign body removal functions and avoiding mutual interference between instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0013] Figure 1 It is a schematic diagram of the structure of the multifunctional endoscopic snare; Figure 2 This is a cross-sectional view of the endoscopic multifunctional snare; Figure 3 This is a partial enlarged view of position A of the multifunctional snare under endoscopy; Figure 4 A partial cross-sectional view of a snare wire of the present invention in an extended state; Figure 5 This is a partial enlarged view of position B of the multifunctional snare under endoscopy; Figure 6 A partial cross-sectional view of the snare wire of the present invention in a recovered state; Figure 7 This is a partial enlarged view of the C position of the multifunctional snare under endoscopy; Figure 8 is a front view of the separation mechanism of the first embodiment; Fig. 9 It is a front view of the separation mechanism of the second embodiment.

[0014] Explanation of reference numerals: 1 snare wire; 11 moving part; 12 working part; 2 separation mechanism; 21 blocking net; 22 hard wire; 23 elastic body; 3 detachment clamp; 31 separation mechanism; 4 endoscope cap; 5 first guide sleeve; 6 second guide sleeve; 7 fixed clamp. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] Embodiment 1 Combination Figure 1 and Figure 2As shown, a multifunctional snare under endoscopy includes a snare wire 1, a guide wire mechanism and an endoscope cap 4. The guide wire mechanism is located inside the endoscope cap 4. The guide wire structure includes at least two mutually nested guide sleeves. The guide sleeves include a second guide sleeve 6 and a first guide sleeve 5 inside the second guide sleeve 6. The snare wire 1 is fixed to the first guide sleeve 5. The snare wire 1 is located inside the second guide sleeve 6. The snare wire 1 can move relative to the second guide sleeve 6. The snare wire 1 and the material properties of the wire itself are wrapped with multiple layers of nested guide sleeves to ensure that the snare wire 1 restores the preset shape after passing through the narrow cavity; the surface coating of the snare wire 1 is prevented from being worn after deformation, resulting in the risk of leakage; the second guide sleeve 6 is used to deliver the snare wire 1 to the electrocute area, the first guide sleeve 5 controls the snare wire 1 to extend and retract, and the snare wire 1 can move relative to the second guide sleeve 6, which is conducive to integrating the hemostasis and foreign body removal functions and avoiding mutual interference between instruments. It should be noted that the first guide sleeve 5 and the second guide sleeve 6 are insulating biocompatible plastics. The multifunctional snare under endoscope also includes a clamping body mechanism, which is located outside the second guide sleeve 6. The clamping body mechanism includes at least two clamps, and the clamps include a detachable clamping body 3 and a fixed clamping body 7. The detachable clamping body 3 is located at the front end of the fixed clamping body 7. A separation mechanism 31 is provided between the detachable clamping body 3 and the second guide sleeve 6. A semi-through groove is provided at the front end of the endoscope cap 4, and the groove width of the semi-through groove matches the width of the detachable clamping body 3. The clamp mechanism is a continuous clamp mechanism, in which the clamp mechanism and the snare wire 1 are coaxially arranged to avoid the integration of multiple functions resulting in an excessively large diameter of the endoscope cap 4, which affects the insertion of the endoscope and makes it impossible to operate on anatomical curved parts that require a smaller diameter, such as the gastric fundus and the hepatic flexure of the colon; and the clamp mechanism is fixed on the outside of the second guide sleeve 6, so there is no need for the snare wire 1 to be completely withdrawn from the snare. When the wire is retracted into the second guide sleeve 6, the operation can be performed, and the detachable clamp 3 is used to immediately clamp and stop bleeding at the electrocute position, shortening the operation time for changing the instrument to stop bleeding at the electrocute position and improving the success rate of the operation; after the detachable clamp 3 clamps the electrocute position, the detachable clamp 3 is separated from the second guide sleeve 6 by the separation mechanism 31, and the fixed clamp 7 is used to clamp and then withdraw the polyp specimen previously retained.

[0017] like Figure 3 As shown, the side wall of the first guide sleeve 5 is provided with a first through hole, the snare wire 1 includes a moving portion 11, the moving portion 11 passes through the first through hole, and the snare wire 1 also includes a working portion 12, and the working portion 12 extends along the extension direction of the guide sleeve. The first through hole and the snare wire 1 cooperate, and when the moving portion of the snare wire 1 is moved, the first guide sleeve 5 is pulled at the same time. The moving portion 11 is used to control the snare wire 1 and the first guide sleeve 5 to extend from the inside of the second guide sleeve 6, and the working portion 12 is used to control the extension length of the snare wire 1, which is used to snare polyps and control the tightening force of the snare.

[0018] like Figure 4As shown, a separation mechanism 2 is provided on the outside of the first guide sleeve 5, and the separation mechanism 2 can change the working state with the relative movement of the first guide sleeve 5 and the second guide sleeve 6, and the separation mechanism 2 separates the endoscope cap 4 and the snare wire 1. The separation mechanism 2 is used to separate the endoscope cap 4 and the extended snare wire 1, so as to avoid the remaining structures of the present invention contacting the snare wire 1 during the electric cutting process of the snare wire 1 to cause leakage and medical accidents. Secondly, the separation mechanism 2 can prevent the polyp specimen from leaving the electric cutting area due to the influence of gravity and intestinal peristalsis after removal. After the polyp specimen stops moving, the separation mechanism 2 and the snare wire 1 are retracted, and the remaining structures are used to clamp the polyp specimen.

[0019] Combination Figure 4 and Figure 5 As shown, the separation mechanism 2 includes a hard support and a blocking net 21. The hard support is connected to the first guide sleeve 5. The blocking net 21 is covered and fixed on the outside of the hard support. The inner circle of the blocking net 21 is connected to the first guide sleeve 5, and the outer circle of the blocking net 21 is provided with an elastic body 23. The hard support is used to connect the first guide sleeve 5, and the outer circle of the blocking net 21 is provided with an elastic body 23. When the blocking net 21 leaves the inside of the second guide sleeve 6, the elastic body 23 recovers according to its own elasticity, and the hard support opens according to the recovery of the elastic body 23 to form a blocking body with the blocking net 21, separating the electrocuting position of the snare wire 1 and the other components of the present invention; after the electrocuting is completed, the removed polyp tissue will move due to factors such as gravity and intestinal peristalsis, and the blocking body formed by the hard support and the blocking net 21 has a blocking effect on the polyp tissue, which can After waiting for the polyp tissue to stop, the snare wire 1 and the separation mechanism 2 are retracted to avoid the loss of the polyp tissue; since the separation mechanism 2 is opened by the elastic body 23, the opening degree of the elastic body 23 can be adaptively adjusted according to the spatial size of the electrocute area to avoid the separation mechanism 2 from causing damage to the surrounding tissue after opening in the electrocute area; the blocking net 21 can be made of a transparent plastic film. The transparent material can prevent the blocking net 21 from blocking the operating field of view after the separation mechanism 2 is opened, making it easy to observe whether the snare is encircling and tightening the pedicle of the polyp tissue.

[0020] like Figure 8 As shown, the hard stent includes at least three hard wires 22, the hard wires 22 are located between the first guide sleeve 5 and the second guide sleeve 6, the blocking net 21 is covered and fixed on the outside of the hard wires 22, and one end of the hard wires 22 is fixed to the first guide sleeve 5. The hard stent uses hard wires 22, and the diameter of the filamentary structure is small, which is convenient for setting the hard stent between the first guide sleeve 5 and the second guide sleeve 6 to control the overall diameter of the present invention; the hard wires 22 can be made of metal materials such as nickel-titanium alloy to prevent the hard wires 22 from deforming when passing through a narrow channel, and at the same time, the hard wires 22 can have a certain strength to form a blocking body with the blocking net 21 to block the polyp tissue after cutting and falling.

[0021] Combination Figure 6 and Figure 7 As shown, when the elastic body 23 is in the contracted state, it cooperates with the inner diameter of the second guide sleeve 6; when the elastic body 23 is in the expanded state, the hard wire 22 and the first guide sleeve 5 have an angle α. Before the snare wire 1 is extended, the elastic body 23 is located inside the second guide sleeve 6, ensuring that the present invention can smoothly pass through a narrow passage. At the same time, because the elastic body 23 is inside the second guide sleeve 6, it can open the second guide sleeve 6 and separate the snare wire 1 and the second guide sleeve 6, avoiding the snare wire 1 from being deformed when passing through a narrow passage; at the same time, because the elastic body 23 is inside the second guide sleeve 6, after the snare wire 1 is retracted into the second guide sleeve 6, the elastic body 23 squeezes the inner wall of the second guide sleeve 6 with a large friction force, and the snare wire 1 can only be extended under the operation of the operator, which can avoid the snare wire 1 from extending from the second guide sleeve 6 due to unexpected situations such as vibration.

[0022] Embodiment 2 like Fig. 9 As shown, different from the first embodiment, in this embodiment, the blocking net 21 is fan-shaped, and the hard wires 22 are evenly distributed on the inner surface of the blocking net 21 at angles. The central angle of the fan of the blocking net 21 is between 180° and 330°, and the fan-shaped notch of the blocking net 21 is located at the top, allowing other surgical instruments to pass through from the top of the present invention, which can be applied to endoscopic surgery with double endoscopic forceps. At the same time, the blocking effect of the blocking net 21 on polyp tissue and the effect of separating the snare wire 1 electrocute area and other structures of the present invention are retained; the interference of the blocking net 21 and the hard stent on the surgical field is reduced. It should be noted that the double endoscopic forceps channel increases the head volume of the endoscope cap, which is difficult or unsuitable for operation of small-diameter anatomical curved parts. Secondly, the cost of the double endoscopic forceps channel is high.

[0023] The present invention can recover specimens in time, avoid displacement and loss of polyp specimens during the process of assistants changing operating instruments, and avoid medical disputes; shorten the total operation time, the interval time between surgical cutting and hemostasis, improve the safety of the operation, and have the following beneficial effects: integrate complex operations such as cutting, hemostasis, and foreign body removal, and reduce the use and replacement time of surgical instruments; control the head volume of the snare to avoid affecting the passage through the endoscopic forceps channel and being suitable for anatomical curved parts such as the gastric fundus and the hepatic flexure of the colon that require a smaller diameter, use a multi-layer nested guide sleeve to wrap the snare wire 1 and the material properties of the wire itself to ensure that the snare wire 1 returns to a preset shape after passing through the narrow cavity; avoid the surface coating of the snare wire 1 from being worn after deformation, resulting in the risk of leakage; the second guide sleeve 6 is used to send the snare wire 1 to the electrocute area, the first guide sleeve 5 controls the snare wire 1 to extend and retract, and the snare wire 1 can move relative to the second guide sleeve 6, which is conducive to integrating the hemostasis and foreign body removal functions and avoiding mutual interference between instruments.

[0024] The above embodiments and / or implementation methods are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

Claims

1. An endoscopic multifunctional snare, comprising a snare wire (1), a guide wire mechanism and an endoscope cap (4), characterized in that: The guide wire mechanism is located inside the endoscope cap (4), the guide wire structure comprises at least two layers of mutually nested guide sleeves, the guide sleeves comprise a second guide sleeve (6) and a first guide sleeve (5) inside the second guide sleeve (6), the snare metal wire (1) is fixed to the first guide sleeve (5), the snare metal wire (1) is located inside the second guide sleeve (6), and the snare metal wire (1) is movable relative to the second guide sleeve (6).

2. The endoscopic multifunctional snare according to claim 1, characterized in that: A first through hole is provided on a side wall of the first guide sleeve (5); the snare wire (1) comprises a moving portion (11), the moving portion (11) passes through the first through hole; the snare wire (1) further comprises a working portion (12), the working portion (12) extends along an extension direction of the guide sleeve.

3. The endoscopic multifunctional snare according to claim 1, characterized in that: A separation mechanism (2) is provided on the outside of the first guide sleeve (5), and the separation mechanism (2) can change its working state as the first guide sleeve (5) and the second guide sleeve (6) move relative to each other, and the separation mechanism (2) separates the endoscope cap (4) and the snare wire (1).

4. The endoscopic multifunctional snare according to claim 3, characterized in that: The partition mechanism (2) comprises a hard support and a blocking net (21), the hard support is connected to the first guide sleeve (5), the blocking net (21) is covered and fixed on the outside of the hard support, the inner ring of the blocking net (21) is connected to the first guide sleeve (5), and the outer ring of the blocking net (21) is provided with an elastic body (23).

5. The endoscopic multifunctional snare according to claim 4, characterized in that: The hard support comprises at least three hard wires (22), the hard wires (22) being located between the first guide sleeve (5) and the second guide sleeve (6), the barrier net (21) being wrapped and fixed on the outside of the hard wires (22), and one end of the hard wires (22) being fixed to the first guide sleeve (5).

6. The endoscopic multifunctional snare according to claim 5, characterized in that: The barrier net (21) is fan-shaped, and the hard wires (22) are distributed on the inner surface of the barrier net (21) at uniform angle intervals.

7. The endoscopic multifunctional snare according to claim 5, characterized in that: When the elastic body (23) is in a contracted state, it cooperates with the inner diameter of the second guide sleeve (6).

8. The multifunctional endoscopic snare according to claim 7, characterized in that: When the elastic body (23) is in an expanded state, the hard wire (22) and the first guide sleeve (5) have an included angle α.

9. The endoscopic multifunctional snare according to claim 3, characterized in that: The multifunctional endoscopic snare also includes a clamping mechanism, the clamping mechanism is located outside the second guide sleeve (6), the clamping mechanism includes at least two clamps, the clamps include a detachable clamp (3), a separation mechanism (31) is provided between the detachable clamp (3) and the second guide sleeve (6), and a semi-through groove is provided at the front end of the endoscope cap (4), the groove width of the semi-through groove matches the width of the detachable clamp (3).

10. The endoscopic multifunctional snare according to claim 9, characterized in that: The clamping body mechanism further comprises a fixed clamping body (7), and the detachable clamping body (3) is located at the front end of the fixed clamping body (7).

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