Endoscopic foreign body retrieval device

Abstract

The present application belongs to the technical field of endoscopic surgical instruments, and provides a device for taking foreign matter under endoscopy. The device comprises a shearing mechanism and a clamping mechanism, the shearing mechanism and the clamping mechanism are parallel, a pulling mechanism is arranged between the shearing mechanism and the clamping mechanism, two ends of the pulling mechanism are connected with the shearing mechanism and the clamping mechanism respectively, the pulling mechanism comprises a first elastic body and a limiting column, the limiting column is a column body with a protruding portion arranged on a side surface; one end of the limiting column is fixed with the shearing mechanism, the other end of the limiting column is in contact with a limiting hole, the pulling mechanism further comprises a connecting column with a thread, the connecting column is provided with a limiting block, the clamping mechanism is provided with a first limiting hole matched with a cross section of the limiting column and a second limiting hole matched with the limiting block of the connecting column. The device can pull out foreign matter, such as foreign matter penetrating into mediastinum, perpendicularly to a shearing plane, so as to avoid secondary injury to a patient caused by force to the oral side; the clamping part is specially structured, so that different foreign matter types can be clamped.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopic surgical instruments, and provides an endoscopic foreign body taking device. BACKGROUND

[0002] In clinical practice, gastroenterologists often encounter patients who accidentally swallow fish bones and other foreign bodies and then get stuck in the esophagus. Fish bones and other foreign bodies are sharp, and during the process of taking out fish bones with conventional foreign body forceps, the esophageal mucosa may be scratched. Moreover, part of the fish bones may pierce into the mediastinum and other chest cavities, posing a risk of puncturing large blood vessels in the chest cavity. When conventional endoscopes cannot remove the fish bones, surgical intervention is required. The existing foreign body forceps for taking out foreign bodies can only be used under the guidance of an endoscope to remove foreign bodies along the long axis of the esophagus from the anal side to the oral side. For fish bones that have pierced into the mediastinum, conventional endoscopic work cannot provide a force perpendicular to the long axis of the esophagus to pull out the fish bones. Under conventional endoscopy, the fish bones can only be held by the foreign body forceps at one end in the esophagus, and then pulled out from the anal side to the oral side with force, but this operation is risky for fish bones that have pierced into the mediastinum, as the fish bones may pierce into the blood vessels above and below, causing massive bleeding. The prior art CN222870611U discloses a novel foreign body forceps for digestive endoscopy, which comprises a fixed cylinder, a hinged rod assembly, a connecting rod assembly, a pull rod, an alligator forceps, and a quick knife changing assembly. The hinged rod assembly is located at one end of the fixed cylinder and is hinged to the end of the fixed cylinder. The hinged rod assembly is connected to the connecting rod assembly. The connecting rod assembly is located on one side of the hinged rod assembly and is arranged inside the fixed cylinder. The other end of the connecting rod assembly is hinged to the pull rod. The pull rod is located on one side of the connecting rod assembly and is slidingly arranged inside the fixed cylinder. The alligator forceps are located at the other end of the hinged rod assembly and are fixedly connected to the hinged rod assembly. The quick knife changing assembly is arranged on one side of the alligator forceps and is fixedly connected to the alligator forceps. The inventor believes that there is room for improvement. SUMMARY

[0003] The present application aims to design an endoscopic foreign body taking device that can cut off foreign bodies and pull out foreign bodies that have pierced into the mediastinum and other tissues perpendicular to the cutting plane, thereby avoiding secondary damage to the patient caused by the force directed towards the oral side. Secondly, the device can hold the piercing end of the foreign body before cutting it off, thereby avoiding secondary damage to the patient caused by the movement of the foreign body during the cutting process. The device can pull out the foreign body perpendicular to the cutting plane, thereby reducing the resistance caused by muscle tension when pulling out the foreign body, avoiding secondary damage to the patient caused by the force directed towards the oral side during the pulling process, and facilitating the postoperative recovery of the patient. The device can be adapted to different types of foreign bodies due to the special structure design of the clamping part.

[0004] The endoscopic foreign body removal device comprises a shearing mechanism and a clamping mechanism, the shearing mechanism and the clamping mechanism are parallel, a pulling mechanism is arranged between the shearing mechanism and the clamping mechanism, two ends of the pulling mechanism are connected with the shearing mechanism and the clamping mechanism respectively, the pulling mechanism comprises a first elastic body and a limiting column, the limiting column is a column body with a protruding part arranged on the side surface, one end of the limiting column is fixed with the shearing mechanism, the other end of the limiting column is in contact with a first limiting hole, the pulling mechanism further comprises a connecting column with a thread, the connecting column is provided with a limiting block, the clamping mechanism is provided with the first limiting hole matched with the cross section of the limiting column and a second limiting hole matched with the limiting block of the connecting column. The endoscopic foreign body removal device adopts the parallel arrangement of the shearing mechanism and the clamping mechanism, so that the shearing mechanism and the clamping mechanism can simultaneously contact and penetrate into the foreign body in the mediastinum, thereby reducing the operation steps, shortening the operation time, and reducing the risk of foreign body displacement caused by the step-by-step shearing operation and clamping operation. The pulling mechanism is provided with the limiting column, when the protruding part of the limiting column is matched with the first limiting hole, the clamping mechanism and the shearing mechanism are linked, when the first guide wire is used to rotate the connecting column, the shearing and clamping operations can be simultaneously completed. When the shearing and clamping operations are completed, the limiting block of the connecting column is matched with the second limiting hole, the first elastic body is contracted to pull the clamping mechanism, the first limiting hole of the clamping mechanism is disengaged from the limiting column, the clamping mechanism and the shearing mechanism are disengaged, the shearing mechanism is opened, the first elastic body is further contracted to pull the clamping mechanism, the foreign body penetrating into the mediastinum or other tissues is pulled out along the direction perpendicular to the clamping mechanism, thereby avoiding the secondary injury to the patient caused by the force to the oral side during the pulling process, and being beneficial to the postoperative recovery of the patient.

[0005] As preferred, one end of the connecting column is connected with the shearing mechanism, the other end of the connecting column is connected with the clamping mechanism, the endoscopic foreign body removal device further comprises a first guide wire, the first guide wire surrounds the connecting column, when the guide wire is pulled, the rotation of the connecting column can drive the rotation of the shearing mechanism and the clamping mechanism. For the endoscopic surgical instrument, only the first guide wire can be used to rotate the connecting column by being manipulated outside the body, so as to realize the shearing operation and the clamping operation.

[0006] As preferred, the shearing mechanism comprises a first shearing piece body and a second shearing piece body, one end of the first shearing piece body and the second shearing piece body close to the limiting column is provided with a recess matched with each other, a second elastic body is arranged in the recess, the second elastic body connects the first shearing piece body and the second shearing piece body, the first shearing piece body and the second shearing piece body are both provided with the limiting column on the side close to the clamping mechanism, and the first shearing piece body and / or the second shearing piece body is connected with the connecting column. The shearing mechanism adopts the second elastic body to connect the first shearing piece body and the second shearing piece body, the second elastic body provides the restoring force of the first shearing piece body and the second shearing piece body, which is used to automatically open the shearing mechanism when the clamping mechanism and the shearing mechanism are disengaged, so as to avoid the foreign body penetrating into the mediastinum or other tissues along the direction perpendicular to the clamping mechanism.

[0007] As preferred, the endoscopic foreign body removal device further comprises a second guide wire and a blocking body mechanism, the blocking body mechanism comprises a shearing end close to the shearing mechanism and a clamping end, the blocking body mechanism comprises a blocking body, the blocking body is a flexible member in a half-spherical shape in an unfolded state, the edge of the blocking body is provided with a fixed end and a guide end, the second guide wire passes through the guide end, and the tail end of the second guide wire is connected with the fixed end. The blocking body mechanism contains an unfoldable half-spherical flexible blocking body, the edge is provided with a fixed end and a guide end, the unfolding / folding of the half-spherical flexible blocking body is controlled through the second guide wire, and the diameter is matched with the guide sleeve. A physical isolation is formed around the foreign body to prevent the sheared foreign body from falling into the deep esophagus or falling into the trachea; the half-spherical flexible blocking body of the blocking body mechanism can be folded into a hook shape to bypass the foreign body from the gap between the foreign body and the esophagus, and is unfolded again in front of the foreign body to prevent the sheared foreign body from falling into the deep esophagus or falling into the trachea.

[0008] As preferred, the top end of the blocking body is provided with a pressure sensor and a miniature camera. The top end of the blocking body is provided with a pressure sensor and a miniature camera, the real-time feedback of the operating force and the field of view is realized, the blocking body needs to bypass the foreign body in a folded state, unfold in front, and prepare to accept the sheared foreign body during the positioning process of the endoscopic foreign body removal device; the pressure sensor detects the pressure borne by the blocking body, avoids the secondary damage to the patient caused by the impact of the blocking body on the foreign body, and confirms whether the blocking body successfully accepts the foreign body to facilitate subsequent operation.

[0009] As preferred, the endoscopic foreign body removal device further comprises a guide sleeve, the guide sleeve surrounds the shearing mechanism and the clamping mechanism, and the diameter of the blocking body is matched with the diameter of the guide sleeve.

[0010] As preferred, the clamping mechanism comprises a first clamping sheet body and a second clamping sheet body, one end of the first clamping sheet body and the second clamping sheet body close to the limiting column is provided with a first limiting hole matched with each other, and the first clamping sheet body and / or the second clamping sheet body is connected with the connecting column.

[0011] As preferred, one end of the first clamping sheet body and the second clamping sheet body away from the limiting column is a clamping part, the opposite surface of the clamping part is a curved surface, and the curved surface of the clamping part closer to the front end is relatively closer. Through the curved surface with gradually changed curvature radius, the holding stability of irregular foreign bodies is optimized, the curved surface of the clamping part closer to the front end is relatively closer, the clamping force of the front end of the clamping part is increased, the slipping of the clamped foreign body is avoided, the flexible foreign body is embedded, the taking-out demand of the flexible foreign body is met, and the taking-out demand of the flexible foreign body is met.

[0012] As preferred, the thickness of the clamping part is greater than that of the first clamping sheet body and the second clamping sheet body, and the curved surface is provided with a flexible material. The thickened clamping part improves the structural strength of the clamping part, meets the taking-out demand of large foreign bodies, and at the same time, cooperates with the curved surface with gradually changed curvature radius to form a groove body that can accommodate more flexible materials and flexible foreign bodies. By extruding and deforming the flexible material and the flexible foreign body in the groove body, the holding stability of the clamping mechanism to irregular foreign bodies and flexible foreign bodies can be further optimized.

[0013] As preferred, the connecting column connects the first clamping piece and the second shearing piece, and the rotating directions of the shearing mechanism and the clamping mechanism are opposite. The shearing operation and the clamping operation are realized by reverse rotation to achieve the symmetrical stress on both sides of the foreign body penetrating into the mediastinum and the like, and the displacement of the foreign body caused by stress during shearing and clamping is avoided.

[0014] The present application solves the problem that the conventional endoscopic work cannot give a force perpendicular to the long axis direction of the esophagus to pull out the fishbone, avoids the risk of causing massive hemorrhage due to the force to the oral side dragging the blood vessels above and below the penetrating fishbone, and has the following beneficial effects: the foreign body penetrating into the mediastinum and the like is pulled out perpendicular to the shearing plane, avoiding the secondary injury to the patient caused by the force to the oral side; the penetrating end of the foreign body penetrating into the mediastinum and the like is clamped before being sheared off, avoiding the secondary injury to the patient caused by moving the foreign body during shearing; the foreign body is pulled out perpendicular to the shearing plane, the contact area between the foreign body and the mediastinum and the like is small, reducing the resistance caused by muscle tension when pulling out the foreign body; avoiding the secondary injury to the patient caused by the force to the oral side during pulling out, which is beneficial to the postoperative recovery of the patient; the clamping part is specially structured to adapt to different types of foreign bodies. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative labor.

[0016] Figure 1 It is a structural schematic diagram of an endoscopic foreign body removal device;

[0017] Figure 2 It is a schematic diagram of an endoscopic foreign body removal device in an expanded state;

[0018] Figure 3 It is a schematic diagram of an endoscopic foreign body removal device in a pulling-out state;

[0019] Figure 4 It is Figure 3 It is a partial enlarged view of the pulling-out state schematic diagram;

[0020] Figure 5 It is a schematic diagram of the internal structure of an endoscopic foreign body removal device;

[0021] Figure 6 It is Figure 5 It is a partial enlarged view of the internal structure schematic diagram;

[0022] Figure 7It is another internal structure schematic view of the endoscopic foreign body taking device;

[0023] Figure 8 It is a bottom view of the endoscopic foreign body taking device;

[0024] Figure 9 It is Figure 8 The partial enlarged view of the bottom view;

[0025] Figure 10 It is a structure schematic view of the blocking body mechanism of example one;

[0026] Figure 11 It is a structure schematic view of the blocking body mechanism of example two.

[0027] Legend: 1 cutting mechanism; 11 first cutting piece; 12 second cutting piece; 2 clamping mechanism; 21 first clamping piece; 22 second clamping piece; 23 first limiting hole; 24 second limiting hole; 25 clamping part; 25a curved surface; 25b flexible material; 3 pulling mechanism; 31 limiting column; 32 connecting column; 33 limiting block; 4 blocking body mechanism; 41 blocking body; 42 guide end; 43 fixed end; 5 guide sleeve; 6 first guide wire; 7 second guide wire. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0029] Example one

[0030] Combined Figures 1 to 4 The endoscopic foreign body taking device shown in the figure comprises a cutting mechanism 1 and a clamping mechanism 2, the cutting mechanism 1 and the clamping mechanism 2 are parallel, a pulling mechanism 3 is arranged between the cutting mechanism 1 and the clamping mechanism 2, both ends of the pulling mechanism 3 are connected to the cutting mechanism 1 and the clamping mechanism 2 respectively, the pulling mechanism 3 comprises a first elastic body and a limiting column 31, the limiting column 31 is a column with a protruding part arranged on the side surface; one end of the limiting column 31 is fixed to the cutting mechanism 1, the other end of the limiting column 31 is in contact with the first limiting hole 23, the pulling mechanism 3 further comprises a connecting column 32 with threads, the connecting column 32 is provided with a limiting block 33, the clamping mechanism 2 is provided with the first limiting hole 23 matched with the cross section of the limiting column 31 and the second limiting hole 24 matched with the limiting block 33 of the connecting column 32.

[0031] By the above arrangement, the endoscopic foreign body removal device adopts parallel arrangement of the shearing mechanism 1 and the clamping mechanism 2, so that the shearing mechanism 1 and the clamping mechanism 2 can simultaneously contact and penetrate into the foreign body in the mediastinum, thereby reducing the operation steps, shortening the operation time, and reducing the risk of foreign body displacement caused by step-by-step shearing operation and clamping operation. The pulling mechanism 3 is provided with a limiting column 31, when the protruding part of the limiting column 31 cooperates with the first limiting hole 23, the clamping mechanism 2 and the shearing mechanism 1 are linked, when the first guide wire 6 rotates the connecting column 32, the shearing and clamping operations can be completed at the same time. When the shearing and clamping operations are completed, the limiting block 33 of the connecting column 32 cooperates with the second limiting hole 24, the first elastic body is retracted to pull the clamping mechanism 2, the first limiting hole 23 of the clamping mechanism 2 is disengaged from the cooperation with the limiting column 31, the clamping mechanism 2 and the shearing mechanism 1 are disengaged, the shearing mechanism 1 is opened, the first elastic body further retracts to pull the clamping mechanism 2, and the foreign body penetrating into the mediastinum and other tissues is pulled out along the direction perpendicular to the clamping mechanism 2, avoiding the force to the oral side in the pulling process to cause secondary injury to the patient, which is beneficial to the postoperative recovery of the patient.

[0032] As shown in Figure 4 , one end of the connecting column 32 is connected to the shearing mechanism 1, and the other end of the connecting column 32 is connected to the clamping mechanism 2. The endoscopic foreign body removal device further comprises a first guide wire 6, the first guide wire 6 surrounds the connecting column 32, and when the guide wire is pulled, the connecting column 32 rotates to drive the shearing mechanism 1 and the clamping mechanism 2 to rotate. For the endoscopic surgical instrument, only the first guide wire 6 can be operated outside the body to rotate the connecting column 32, thereby realizing the shearing operation and the clamping operation.

[0033] As shown in Figures 5 to 7 , the shearing mechanism 1 comprises a first shearing piece 11 and a second shearing piece 12, and the first shearing piece 11 and the second shearing piece 12 are provided with recesses matched with each other at one end close to the limiting column 31. The recesses are provided with a second elastic body, the second elastic body connects the first shearing piece 11 and the second shearing piece 12, and the first shearing piece 11 and the second shearing piece 12 are provided with limiting columns 31 at one side close to the clamping mechanism 2. The first shearing piece 11 and / or the second shearing piece 12 are connected to the connecting column 32. The shearing mechanism 1 adopts the second elastic body to connect the first shearing piece 11 and the second shearing piece 12, the second elastic body provides the restoring force of the first shearing piece 11 and the second shearing piece 12, which is used for the clamping mechanism 2 and the shearing mechanism 1 to be disengaged, the shearing mechanism 1 is automatically opened, and the foreign body penetrating into the mediastinum and other tissues is pulled out along the direction perpendicular to the clamping mechanism 2.

[0034] The endoscopic foreign body removal device further comprises a guide sleeve 5, the guide sleeve 5 surrounds the shearing mechanism 1 and the clamping mechanism 2, and the diameter of the stop body 41 is matched with the diameter of the guide sleeve 5.

[0035] As shown in Figure 8As shown, the clamping mechanism 2 includes a first clamping piece 21 and a second clamping piece 22, which are provided with first limiting holes matched with each other at one end close to the limiting column 31, and the first clamping piece 21 and / or the second clamping piece 22 are connected to the connecting column 32.

[0036] The first clamping piece 21 and the second clamping piece 22 are provided with clamping portions 25 at the other end away from the limiting column 31, and the opposite surfaces of the clamping portions 25 are curved surfaces 25a, and the curved surfaces 25a of the clamping portions 25 closer to the front end are relatively closer. By the curved surfaces 25a with gradually changed radii of curvature, the holding stability of irregular foreign matters is optimized, the curved surfaces 25a of the clamping portions 25 closer to the front end are relatively closer, the clamping force of the front end of the clamping portions 25 is increased, the foreign matters are prevented from slipping off, and the flexible foreign matters are easily embedded, so that the requirement of taking out the flexible foreign matters is met.

[0037] As shown in Figs. 1 and 2, Figure 7 and Figure 9 As shown, the thickness of the clamping portions 25 is greater than that of the first clamping piece 21 and the second clamping piece 22, and the curved surfaces 25a are provided with flexible materials 25b. The thickened clamping portions improve the structural strength of the clamping portions 25, meet the requirement of taking out large foreign matters, and form grooves capable of accommodating more flexible materials 25b in cooperation with the curved surfaces 25a with gradually changed radii of curvature, so that the holding stability of the clamping mechanism 2 to irregular foreign matters is further optimized by extruding and deforming the flexible materials 25b in the grooves.

[0038] As shown in Figs. 1 and 2, Figure 8 As shown, the connecting column 32 connects the first clamping piece 21 and the second clamping piece 22, and the rotating directions of the shearing mechanism 1 and the clamping mechanism are opposite. The shearing operation and the clamping operation are cooperated by the opposite rotating, the foreign matters in the mediastinum and other tissues are symmetrically stressed on both sides, and the displacement of the foreign matters in the shearing and clamping process is avoided.

[0039] As shown in Figs. 1 and 2, Figure 1 , Figure 2 and Figure 10 As shown, the foreign matter taking device under the endoscope further includes a second guide wire 7 and a blocking body mechanism 4, the blocking body mechanism 4 includes a shearing end close to the shearing mechanism 1 and a clamping end, and the blocking body mechanism 4 includes a blocking body 41 which is a flexible member in a half-spherical shape in an expanded state, the edge of the blocking body 41 is provided with a fixed end 43 and five guide ends 42, the second guide wire 7 passes through the guide ends 42, and the tail end of the second guide wire 7 is connected to the fixed end 43. The blocking body mechanism 4 includes the expandable half-spherical flexible blocking body 41, the edge is provided with the fixed end 43 and the guide end 42, the expansion / contraction of the half-spherical flexible blocking body 41 is controlled by the second guide wire 7, and the diameter is matched with the guide sleeve 5. Physical isolation is formed around the foreign matter, the foreign matter under shearing is prevented from falling into the deep esophagus or falling into the trachea. The half-spherical flexible blocking body is made of transparent material.

[0040] The top end of the blocking body 41 has a transparent spherical shell, and a pressure sensor and a miniature camera are arranged in the spherical shell, and the spherical shell is made of a transparent material. The pressure sensor and the miniature camera are arranged in the top end of the blocking body 41, so that the operation force and the field of view can be fed back in real time, and the blocking body 41 needs to be wound around the foreign matter in a folded state during the positioning process of the foreign matter taking device under the endoscope, and then expanded in front to prepare to receive the cut foreign matter. The pressure sensor detects the pressure borne by the blocking body 41, so as to avoid that the blocking body 41 collides with the foreign matter to cause secondary damage to the patient, and to confirm whether the blocking body 41 successfully receives the foreign matter, thereby facilitating subsequent operation.

[0041] Embodiment two

[0042] Different from the embodiment one, as shown in the figure, Figure 11 in the embodiment, a spring is arranged outside the second guide wire 7 of the blocking body mechanism 4, and when the foreign matter taking device under the endoscope is used, the blocking body can be expanded by the elastic force of the spring, so that the foreign matter taking device under the endoscope is in a closed state and enters the esophagus of the patient, and the guide sleeve 5 and the blocking body 4 completely cover the cutting mechanism 1 and the endoscope mechanism 2, so as to solve the problem of friction damage when the instrument enters and exits the endoscope channel. When the foreign matter taking device under the endoscope approaches the foreign matter, the second guide wire 7 is pulled, the spring is compressed, and the blocking body 4 is folded at the same time. The blocking body 4 is wound around the foreign matter from the gap between the foreign matter and the esophagus, and then the second guide wire 7 is released. The elastic force of the spring makes the blocking body 4 re-expand in front of the foreign matter, so as to solve the problem that the second guide wire 7 may be pressed by the esophageal tissue of the patient due to the stenosis of the esophagus, the strength of the second guide wire 7 is insufficient, and the blocking body 4 cannot be completely expanded.

[0043] The application solves the problem that the conventional endoscopic work cannot give a force perpendicular to the long axis direction of the esophagus to pull out the fishbone, avoids the risk that the fishbone is dragged to the oral side and causes bleeding due to the fishbone piercing the blood vessels above and below, and has the following beneficial effects: the foreign matter piercing the mediastinum and the like is pulled out perpendicular to the cutting plane, avoiding the secondary damage to the patient caused by the force to the oral side; the piercing end of the foreign matter piercing the mediastinum and the like is clamped before the foreign matter is cut, avoiding the secondary damage to the patient caused by the movement of the foreign matter during the cutting process; the foreign matter is pulled out perpendicular to the cutting plane, the contact area between the foreign matter and the mediastinum and the like is small, and the resistance caused by muscle tension when the foreign matter is pulled out is reduced; the force to the oral side during the pulling-out process avoids the secondary damage to the patient, which is beneficial to the postoperative recovery of the patient; the clamping part 25 is specially structured and designed, and can adapt to different types of foreign matter.

[0044] The above embodiments are only used to illustrate the preferred embodiments of the application, and do not limit the embodiments of the application in any form. Any person skilled in the art can make some changes without departing from the scope of the technical means disclosed in the application, and other equivalent embodiments can be made, but they should be regarded as the same technology or embodiment as the application.

Claims

1. An endoscopic foreign body removal device comprising a shearing mechanism (1) and a clamping mechanism (2), characterized in that, The shearing mechanism (1) and the clamping mechanism (2) are parallel, and the pulling mechanism (3) is arranged between the shearing mechanism (1) and the clamping mechanism (2), two ends of the pulling mechanism (3) are connected with the shearing mechanism (1) and the clamping mechanism (2) respectively, the pulling mechanism (3) comprises a first elastic body and a limiting column (31), the limiting column (31) is a column body with a protruding part arranged on the side surface, one end of the limiting column (31) is fixed with the shearing mechanism (1), the other end of the limiting column (31) is in contact with the first limiting hole (23), the pulling mechanism (3) further comprises a threaded connecting column (32), the connecting column (32) is provided with a limiting block (33), the clamping mechanism (2) is provided with the first limiting hole (23) matched with the cross section of the limiting column (31) and the second limiting hole (24) matched with the limiting block (33) of the connecting column (32); one end of the connecting column (32) is connected with the shearing mechanism (1), the other end of the connecting column (32) is connected with the clamping mechanism (2), the endoscope foreign matter taking device further comprises a first guide wire (6), the first guide wire (6) surrounds the connecting column (32), when the guide wire is pulled, the connecting column (32) rotates to drive the shearing mechanism (1) and the clamping mechanism (2) to rotate; when the shearing and clamping operations are completed, the limiting block (33) of the connecting column (32) is matched with the second limiting hole (24), the first elastic body is contracted to pull the clamping mechanism (2), the first limiting hole (23) of the clamping mechanism (2) is disengaged from the limiting column (31), the clamping mechanism (2) and the shearing mechanism (1) are disengaged, the shearing mechanism (1) is opened, the first elastic body is further contracted to pull the clamping mechanism (2), and the foreign matter pierced into the mediastinum and other tissues is pulled out along the direction perpendicular to the clamping mechanism (2).

2. The device according to claim 1, wherein The shearing mechanism (1) comprises a first shearing piece body (11) and a second shearing piece body (12), one end of the first shearing piece body (11) and the second shearing piece body (12) close to the limiting column (31) is provided with a recess matched with each other, the recess is provided with a second elastic body, the second elastic body connects the first shearing piece body (11) and the second shearing piece body (12), one side of the first shearing piece body (11) and the second shearing piece body (12) close to the clamping mechanism (2) is provided with the limiting column (31), and the first shearing piece body (11) and / or the second shearing piece body (12) is connected with the connecting column (32).

3. The device according to claim 1, wherein The endoscope foreign matter taking device further comprises a second guide wire (7) and a blocking body mechanism (4), the blocking body mechanism (4) comprises a shearing end close to the shearing mechanism (1) and a clamping end, the blocking body mechanism (4) comprises a blocking body (41), the blocking body (41) is a flexible piece in a half spherical shape in an unfolded state, an edge of the blocking body (41) is provided with a fixed end (43) and a guide end (42), the second guide wire (7) passes through the guide end (42), and an end of the second guide wire (7) is connected with the fixed end (43).

4. The device according to claim 3, wherein A pressure sensor and a miniature camera are arranged at the top end of the blocking body (41).

5. The device according to claim 3, wherein The endoscopic foreign body removing device further comprises a guide sleeve (5) surrounding the shearing mechanism (1) and the clamping mechanism (2), and the diameter of the stop body (41) is matched with the diameter of the guide sleeve (5).

6. The device according to claim 1, wherein The clamping mechanism (2) comprises a first clamping piece (21) and a second clamping piece (22), and the first clamping piece (21) and the second clamping piece (22) are provided with first limiting holes (23) matched with each other at one end close to the limiting column (31), and the first clamping piece (21) and / or the second clamping piece (22) are connected with the connecting column (32).

7. The device according to claim 6, wherein The first clamping piece (21) and the second clamping piece (22) are clamping portions (25) at one end away from the limiting column (31), the opposite surfaces of the clamping portions (25) are curved surfaces (25a), and the curved surfaces (25a) are relatively closer to the front end.

8. The device according to claim 7, wherein The thickness of the clamping portions (25) is greater than that of the first clamping piece (21) and the second clamping piece (22), and the curved surfaces (25a) are provided with flexible materials (25b).

9. The device according to claim 6, wherein The connecting column (32) connects the first clamping piece (21) and the second shearing piece (12), and the rotating directions of the shearing mechanism (1) and the clamping mechanism (2) are opposite.

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