A multifunctional endoscopic snare

Abstract

The present invention belongs to the technical field of endoscopic surgical instruments and provides a multifunctional endoscopic snare. A multifunctional endoscopic snare includes a snare wire, a guide wire mechanism, and an endoscopic cap. The guide wire mechanism is located inside the endoscopic cap. The guide wire structure includes at least two layers of nested guide sleeves. The guide sleeve includes 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 can move relative to the second guide sleeve. The purpose of the present invention is to be able to timely retrieve polyp specimens to avoid medical disputes; shorten the operation time and improve the safety of the operation; integrate composite operations such as cutting, hemostasis, and foreign body removal, 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 be applicable to anatomical curved parts such as the fundus of the stomach and the hepatic flexure of the colon that require a smaller diameter.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopic surgical instruments, and specifically provides a multifunctional snare under endoscopy. Background Art

[0002] In the field of endoscopic surgery, for the treatment of tracheal polyps, colonic polyps, gastric fundus polyps, etc., especially in the treatment of colonic polyps, endoscopic mucosal resection (EMR) is often required. A snare is used to enclose the protruding polyp, and electrocision is performed under endoscopy. Then, the snare is withdrawn, and the polyp is aspirated out by endoscopic negative pressure, or a biopsy forceps is replaced to retrieve the polyp and recover the specimen, and then the wound surface is closed with a disposable titanium clip. However, such operations often have the following deficiencies in clinical treatment: 1. During the process of endoscopic negative pressure aspiration, due to reasons such as intestinal peristalsis and the long length of the endoscopic pipeline, the specimen may be lost and pathological detection cannot be performed; 2. In special anatomical sites such as the descending part of the duodenum, due to the influence of gravity, the specimen resected by EMR under endoscopy is more likely to fall into the distal duodenum, resulting in failure to recover the specimen; 3. During the entire treatment process, the assistant needs to replace the endoscopic accessories, which takes a long time and leads to a long operation time. The prior art CN114569234A discloses a multifunctional snare for endoscopic surgery, including: a handle, an outer sheath tube, an inner sheath tube, an electrocautery snare, and a clamp. A slidable first slider and a second slider are provided on the handle. The inner sheath tube is inserted into the outer sheath tube, and both the outer sheath tube and the inner sheath tube are provided on the handle. The clamp is provided at the free end of the inner sheath tube. The electrocautery snare is sleeved outside the inner sheath tube. The first slider is connected to the clamp through a first control member, and the second slider is connected to the clamp through a second control member. The first control member is located in the inner sheath tube, and the second control member is located between the outer sheath tube and the inner sheath tube. The inventor believes that there is great room for improvement in the prior art. Summary of the Invention

[0003] The object of the present invention is to be able to recover specimens in a timely manner, avoid the displacement and loss of polyp specimens during the process of the assistant changing operating instruments, and avoid medical disputes; shorten the total operation time, the interval time between operation cutting and hemostasis, and improve the safety of the operation. Secondly, integrate composite operations such as cutting, hemostasis, and foreign body removal, 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 applicable to anatomical curved parts such as the fundus of the stomach and the hepatic flexure of the colon that require a smaller diameter. For this purpose, the present invention provides an endoscopic multifunctional snare, which includes a snare wire, a guide wire mechanism, and an endoscopic cap. The guide wire mechanism is located inside the endoscopic cap. The guide wire structure includes at least two layers of nested guide sleeves. The guide sleeve includes 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 multi-layer nested guide sleeve wraps the snare wire and the material properties of the wire itself to ensure that the snare wire resumes its preset shape after passing through the narrow channel; avoid the wear of the surface coating of the snare wire after deformation and the risk of electric leakage; the second guide sleeve is used to send the snare wire to the electrocision area, and the first guide sleeve controls the extension and contraction 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 beneficial to integrating the hemostasis and foreign body removal functions and avoiding interference between instruments. It should be noted that the first guide sleeve and the second guide sleeve are insulating biocompatible plastics.

[0004] Preferably, the side wall of the first guide sleeve is provided with a first through hole. The snare wire includes a moving part that passes through the first through hole. The snare wire further includes a working part that extends along the extension direction of the guide sleeve. The moving part is used to control the snare wire and the first guide sleeve to extend out from inside the second guide sleeve, and the working part is used to control the extension length of the snare wire for snaring polyps and controlling the tightening force of the snare.

[0005] Preferably, a separating mechanism is provided outside the first guide sleeve. The separating mechanism can change its working state with the relative movement of the first guide sleeve and the second guide sleeve. The separating mechanism separates the endoscopic cap and the snare wire. The separating mechanism is used to separate the endoscopic cap and the extended snare wire to avoid electric leakage and medical accidents caused by the contact between the remaining structure of the present invention and the snare wire during the electrocision of the snare wire. Secondly, the separating mechanism can prevent the polyp specimen from leaving the electrocision area due to gravity and intestinal peristalsis after resection. After the polyp specimen stops moving, the separating mechanism and the snare wire are retracted, and the remaining structure is used to clamp the polyp specimen.

[0006] Preferably, the separating mechanism includes a rigid bracket and a blocking net. The rigid bracket is connected to the first guide sleeve. The blocking net is wrapped and fixed on the outside of the rigid bracket. The inner circle of the blocking net is connected to the first guide sleeve, and an elastic body is provided on the outer circle of the blocking net. By using the rigid bracket to connect the first guide sleeve and providing an elastic body on the outer circle of the blocking net, when the blocking net leaves the inside of the second guide sleeve, the elastic body restores according to its own elasticity, and the rigid bracket opens according to the restoration of the elastic body to form a blocking body with the blocking net, separating the electrocision position of the snare wire of the separating snare and the other components of the present invention; after electrocision, the excised polyp tissue will move due to factors such as gravity and intestinal peristalsis. The blocking body formed by the rigid bracket and the blocking net has a blocking effect on the polyp tissue. After the polyp tissue stops stably, the snare wire and the separating mechanism can be retracted to avoid the loss of the polyp tissue; since the separating mechanism is opened by the elastic body, the opening degree of the elastic body can be adjusted adaptively according to the space size of the electrocision area, avoiding damage to the surrounding tissues after the separating mechanism is opened in the electrocision area; preferably, the blocking net can be made of a transparent plastic film. The transparent material can prevent the blocking net from blocking the operation field of view after the separating mechanism is opened, facilitating the observation of whether the snare can hoop and tighten the pedicle of the polyp tissue.

[0007] Preferably, the rigid bracket includes at least three rigid wires. The rigid wires are located between the first guide sleeve and the second guide sleeve. The blocking net is wrapped and fixed on the outside of the rigid wires, and one end of the rigid wires is fixed to the first guide sleeve. The rigid bracket uses rigid wires, and the diameter of the filamentous structure is small, which is convenient for arranging the rigid bracket between the first guide sleeve and the second guide sleeve and controlling the overall diameter of the present invention; preferably, the rigid wires can be made of metal materials such as nitinol to avoid deformation of the rigid wires when passing through a narrow channel. At the same time, the rigid wires can have a certain strength to form a blocking body with the blocking net to block the polyp tissue after cutting.

[0008] Preferably, the blocking net is fan-shaped, and the rigid wires are evenly distributed on the inner surface of the blocking net at angular intervals. The central angle of the fan-shaped blocking net is between 180° and 330°. The fan-shaped notch of the blocking net is located at the top, allowing other surgical instruments to pass through the upper part of the present invention. At the same time, the blocking effect of the blocking net on the polyp tissue and the separation effect of the electrocision area of the snare wire and other structures of the present invention are retained.

[0009] Preferably, when the elastomer is in a contracted state, it cooperates with the inner diameter of the second guide sleeve; when the elastomer is in an expanded state, the rigid wire forms an angle α with the first guide sleeve. Before the snare wire of the snare device extends out, the elastomer is located inside the second guide sleeve, ensuring that the present invention can smoothly pass through a narrow channel. At the same time, since the elastomer is inside the second guide sleeve, it can expand the second guide sleeve and isolate the snare wire from the second guide sleeve, avoiding deformation of the snare wire when the present invention passes through the narrow channel; also, because there is an elastomer inside the second guide sleeve, after the snare wire is retracted into the second guide sleeve, the elastomer presses against the inner wall of the second guide sleeve with a large frictional force, and the snare wire can only extend out under the operation of the operator, which can avoid the snare wire extending out of the second guide sleeve due to accidental situations such as vibration.

[0010] Preferably, the endoscopic multi-functional snare device further includes a clip body mechanism. The clip body mechanism is located outside the second guide sleeve. The clip body mechanism includes at least two clip bodies. Each clip body includes a detachable clip body and a fixed clip body. The detachable clip body is located at the front end of the fixed clip body. A separation mechanism is provided between the detachable clip body and the second guide sleeve. A semi-through groove is provided at the front end of the endoscopic cap, and the groove width of the semi-through groove matches the width of the detachable clip body. The clip body mechanism and the snare wire are coaxially arranged, avoiding the excessive diameter of the endoscopic cap caused by the integration of multiple functions, which affects passing through the endoscopic sheath and makes it impossible to operate on anatomical curved parts such as the gastric fundus and hepatic flexure of the colon that require a smaller diameter; and the clip body mechanism is fixed outside the second guide sleeve, without the need for the entire snare wire to be withdrawn from the snare device. When the wire is retracted into the second guide sleeve, the operation can be performed. The detachable clip body is used to immediately clamp and stop bleeding at the electrocision position, shortening the operation time for replacing instruments to stop bleeding at the electrocision position and improving the success rate of the operation; after the detachable clip body clamps the electrocision position, the detachable clip body and the second guide sleeve are separated through the separation mechanism, and the fixed clip body is used to clamp the previously retained polyp specimen and then withdrawn. Compared with the traditional method of reinserting the endoscopic clip after withdrawal, the time for replacing surgical instruments is shortened, and the loss of polyp specimens is avoided.

[0011] The present invention enables timely recovery of specimens, avoiding displacement and loss of polyp specimens during the process of the assistant changing operating instruments, and avoiding medical disputes; shortening the total operation time and the interval time between operation cutting and hemostasis, improving the safety of the operation, and having the following beneficial effects: integrating composite operations such as cutting, hemostasis, and foreign body removal, reducing the use and replacement time of operating instruments; controlling the head volume of the snare to avoid affecting passage through the endoscopic forceps channel and being applicable to anatomical bending parts such as the fundus of the stomach and the hepatic flexure of the colon that require a smaller diameter, using 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 resumes its preset shape after passing through a narrow channel; avoiding wear of the surface coating of the snare wire after deformation and the risk of electric leakage; the second guide sleeve is used to send the snare wire to the electrocision 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 beneficial to integrating the functions of hemostasis and foreign body removal and avoiding interference between instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0013] Figure 1 is a schematic structural diagram of a multi-functional snare under an endoscope;

[0014] Figure 2 is a cross-sectional view of a multi-functional snare under an endoscope;

[0015] Figure 3 is a partial enlarged view of position A of the multi-functional snare under an endoscope;

[0016] Figure 4 is a partial cross-sectional view of the snare wire in the extended state of the present invention;

[0017] Figure 5 is a partial enlarged view of position B of the multi-functional snare under an endoscope;

[0018] Figure 6 is a partial cross-sectional view of the snare wire in the recovered state of the present invention;

[0019] Figure 7 is a partial enlarged view of position C of the multi-functional snare under an endoscope;

[0020] Figure 8 is a front view of the separation mechanism in Embodiment 1;

[0021] Figure 9 Front view of the separating mechanism in the second embodiment.

[0022] Description of reference numerals: 1 snare wire; 11 moving part; 12 working part; 2 separating mechanism; 21 blocking net; 22 rigid wire; 23 elastic body; 3 release clip body; 31 separating mechanism; 4 endoscopic cap; 5 first guide sleeve; 6 second guide sleeve; 7 fixed clip body. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Embodiment 1

[0025] Combined with Figure 1 and Figure 2As shown in the figure, a multifunctional endoscopic snare includes a snare wire 1, a guide wire mechanism, and an endoscopic cap 4. The guide wire mechanism is located inside the endoscopic cap 4. The guide wire structure includes at least two layers of 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 and can move relative to the second guide sleeve 6. The use of multiple nested guide sleeves to wrap the snare wire 1 and the material properties of the wire itself ensures that the snare wire 1 resumes its preset shape after passing through a narrow channel; it avoids the wear of the surface coating of the snare wire 1 after deformation and the risk of electric leakage; the second guide sleeve 6 is used to send the snare wire 1 to the electrocision area, and the first guide sleeve 5 controls the extension and contraction of the snare wire 1. The snare wire 1 can move relative to the second guide sleeve 6, which is beneficial to integrating the functions of hemostasis and foreign body removal and avoiding interference between instruments. It should be noted that the first guide sleeve 5 and the second guide sleeve 6 are made of insulating biocompatible plastics. The multifunctional endoscopic snare also includes a clamp body mechanism. The clamp body mechanism is located outside the second guide sleeve 6. The clamp body mechanism includes at least two clamp bodies. The clamp bodies include a detachable clamp body 3 and a fixed clamp body 7. The detachable clamp body 3 is located at the front end of the fixed clamp body 7. A separation mechanism 31 is provided between the detachable clamp body 3 and the second guide sleeve 6. A semi-through groove is provided at the front end of the endoscopic cap 4, and the groove width of the semi-through groove matches the width of the detachable clamp body 3. The clamp body mechanism is a continuous firing clamp body mechanism. The clamp body mechanism and the snare wire 1 are coaxially arranged to avoid the excessive diameter of the endoscopic cap 4 caused by the integration of multiple functions, which affects the passage through the endoscope and makes it impossible to operate on anatomical curved parts such as the fundus of the stomach and the hepatic flexure of the colon that require a smaller diameter; and the clamp body mechanism is fixed outside the second guide sleeve 6, without the need for the entire snare wire 1 to be withdrawn from the snare. When the wire is retracted into the second guide sleeve 6, the operation can be performed. The detachable clamp body 3 is used to immediately clamp and stop bleeding at the electrocision position, shortening the operation time for replacing instruments to stop bleeding at the electrocision position and improving the success rate of the operation; after the detachable clamp body 3 clamps the electrocision position, the detachable clamp body 3 and the second guide sleeve 6 are separated through the separation mechanism 31, and the fixed clamp body 7 is used to clamp the previously retained polyp specimen and then withdraw it.

[0026] As Figure 3 shown, the side wall of the first guide sleeve 5 is provided with a first through hole. The snare wire 1 includes a moving part 11. The moving part 11 passes through the first through hole. The snare wire 1 also includes a working part 12. The working part 12 extends along the extension direction of the guide sleeve. The first through hole and the snare wire 1 are matched. When moving the moving part of the snare wire 1, the first guide sleeve 5 is simultaneously pulled. The moving part 11 is used to control the extension of the snare wire 1 and the first guide sleeve 5 from inside the second guide sleeve 6, and the working part 12 is used to control the extension length of the snare wire 1 for snaring polyps and controlling the tightening force of the snare.

[0027] As Figure 4As shown, a separating mechanism 2 is provided outside the first guide sleeve 5. The separating mechanism 2 can change its working state with the relative movement of the first guide sleeve 5 and the second guide sleeve 6. The separating mechanism 2 separates the endoscopic cap 4 and the snare wire 1. By using the separating mechanism 2 to separate the endoscopic cap 4 and the extended snare wire 1, it is avoided that during the electrosurgical cutting process of the snare wire 1, the rest of the structure of the present invention comes into contact with the snare wire 1, resulting in electric leakage and causing medical accidents. Secondly, the separating mechanism 2 can prevent the polyp specimen from leaving the electrocision area under the influence of gravity and intestinal peristalsis, etc. After the polyp specimen stops moving, the separating mechanism 2 and the snare wire 1 are retracted, and the rest of the structure is used to clamp the polyp specimen.

[0028] Combined with Figure 4 and Figure 5 As shown, the separating mechanism 2 includes a rigid support and a blocking net 21. The rigid support is connected to the first guide sleeve 5, the blocking net 21 is coated and fixed on the outside of the rigid support, the inner ring of the blocking net 21 is connected to the first guide sleeve 5, and an elastic body 23 is provided on the outer ring of the blocking net 21. By using the rigid support to connect the first guide sleeve 5 and providing the elastic body 23 on the outer ring of the blocking net 21, when the blocking net 21 leaves the inside of the second guide sleeve 6, the elastic body 23 restores according to its own elasticity, and the rigid support opens according to the restoration of the elastic body 23 to form a blocking body with the blocking net 21, separating the electrocision position of the snare wire 1 and the rest of the components of the present invention; after the electrocision is completed, the excised polyp tissue will move under the action of factors such as gravity and intestinal peristalsis, etc. The blocking body formed by the rigid support and the blocking net 21 has a blocking effect on the polyp tissue. It is possible to wait for the polyp tissue to stop stably and then retract the snare wire 1 and the separating mechanism 2 to avoid the loss of the polyp tissue; since the separating mechanism 2 uses the elastic body 23 to complete the opening, the opening degree of the elastic body 23 can be adjusted adaptively according to the space size of the electrocision area, avoiding damage to the surrounding tissues after the separating mechanism 2 opens in the electrocision area; the blocking net 21 can be made of a transparent plastic film, and the transparent material can avoid blocking the operation field of view by the blocking net 21 after the separating mechanism 2 opens, facilitating the observation of whether the snare can hoop and tighten the stalk of the polyp tissue.

[0029] As Figure 8 shown, the rigid support includes at least three rigid wires 22. The rigid wires 22 are located between the first guide sleeve 5 and the second guide sleeve 6, the blocking net 21 is coated and fixed on the outside of the rigid wires 22, and one end of the rigid wires 22 is fixed to the first guide sleeve 5. The rigid support uses the rigid wires 22, and the diameter of the filamentous structure is small, which is convenient for arranging the rigid support between the first guide sleeve 5 and the second guide sleeve 6 and controlling the overall diameter of the present invention; the rigid wires 22 can be made of metal materials such as nitinol to avoid deformation of the rigid wires 22 when passing through a narrow channel, and at the same time the rigid wires 22 can have a certain strength to form a blocking body with the blocking net 21 to block the polyp tissue after cutting off.

[0030] Combined with Figure 6 andFigure 7 As shown, when the elastomer 23 is in a contracted state, it cooperates with the inner diameter of the second guide sleeve 6; when the elastomer 23 is in an expanded state, the rigid wire 22 forms an angle α with the first guide sleeve 5. Before the snare wire 1 of the present invention extends out, the elastomer 23 is located inside the second guide sleeve 6, ensuring that the present invention can smoothly pass through a narrow channel. At the same time, because the elastomer 23 is inside the second guide sleeve 6, it can expand the second guide sleeve 6 and isolate the snare wire 1 from the second guide sleeve 6, preventing the snare wire 1 from deforming when the present invention passes through the narrow channel; at the same time, because there is an elastomer 23 inside the second guide sleeve 6, after the snare wire 1 is retracted into the second guide sleeve 6, the elastomer 23 exerts a large frictional force on the inner wall of the second guide sleeve 6, and the snare wire 1 can only extend out under the operation of the operator, avoiding the snare wire 1 extending out of the second guide sleeve 6 due to accidental situations such as vibration.

[0031] Embodiment 2

[0032] As Figure 9 shown, different from Embodiment 1, in this embodiment, the blocking net 21 is fan-shaped, and the rigid wires 22 are evenly distributed at an angular interval on the inner surface of the blocking net 21. The central angle of the fan shape 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 above the present invention, being applicable to endoscopic surgeries with double endoscopic forceps channels. At the same time, the blocking effect of the blocking net 21 on the polyp tissue and the separation effect between the electrocision area of the snare wire 1 and other structures of the present invention are retained; the interference of the blocking net 21 and the rigid stent on the surgical field is reduced. It should be noted that the double endoscopic forceps channels increase the head volume of the endoscopic cap, making it difficult or inapplicable to operate on anatomical bending parts with a small diameter. Secondly, the manufacturing cost of the double endoscopic forceps channels is high.

[0033] The present invention can achieve timely specimen recovery, avoiding the displacement and loss of the polyp specimen during the process of the assistant changing the operating instrument, and avoiding medical disputes; shortening the total operation time, the interval time between operation cutting and hemostasis, improving the safety of the operation, and having the following beneficial effects: integrating composite operations such as cutting, hemostasis, and foreign body removal, reducing the use and replacement time of surgical instruments; controlling the head volume of the snare to avoid affecting passage through the endoscopic forceps channel and being applicable to anatomical bending parts such as the gastric fundus and hepatic flexure of the colon that require a smaller diameter, using 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 resumes its preset shape after passing through the narrow cavity; avoiding wear of the surface coating of the snare wire 1 after deformation and the risk of electric leakage; the second guide sleeve 6 is used to send the snare wire 1 to the electrocision area, the first guide sleeve 5 controls the extension and contraction of the snare wire 1, and the snare wire 1 can move relative to the second guide sleeve 6, which is beneficial to integrating the hemostasis and foreign body removal functions and avoiding interference between instruments.

[0034] The above embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for realizing the technology of the present invention, and do not impose any formal restrictions on the implementation manners of the technology of the present invention. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of the present invention, may make some minor changes to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the present invention in essence.

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 mechanism 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); 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); The separation 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); The hard stent 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), and the elastic body (23) being in a contracted state and cooperating with the inner diameter of the second guide sleeve (6); and when the elastic body (23) is in an expanded state, the hard wires (22) and the first guide sleeve (5) have an included angle α.

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 2, characterized in that: The barrier net (21) is wrapped and fixed on the outside of the hard wire (22), and one end of the hard wire (22) is fixed to the first guide sleeve (5).

4. The endoscopic multifunctional snare according to claim 3, 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.

5. The endoscopic multifunctional snare according to claim 1, 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).

6. The endoscopic multifunctional snare according to claim 5, 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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