CN-122005006-A - Magnetic control traction type tissue traction fixing clamp under endoscope and control system thereof

CN122005006ACN 122005006 ACN122005006 ACN 122005006ACN-122005006-A

Abstract

The invention discloses a magnetic control traction type tissue traction fixing clamp under an endoscope and a control system thereof. The magnetic control traction type tissue traction fixing clamp comprises a handle assembly, an outer tube assembly and a clamping assembly, wherein the outer tube assembly comprises a flexible outer tube, a pull rod and an adapter, the handle assembly comprises a fixed handle and a movable handle which are connected in a sliding mode, the movable handle is in transmission connection with one end of the pull rod, the clamping assembly further comprises a guide joint, a pull shaft, a first clamping jaw and a second clamping jaw, a first pin shaft is arranged on the guide joint, the pull shaft slides axially in the guide joint, one end of the pull shaft is clamped with the pull rod, the other end of the pull shaft is provided with a second pin shaft, the first clamping jaw and the second clamping jaw are hinged through the second pin shaft, opposite sides of the guide joint are hinged with one end of a connecting rod through the first pin shaft, and the other end of the connecting rod is hinged with one end of a traction magnet through a third pin shaft. The invention controls the opening and closing of the clamping component and the separation of the clamping component and the outer pipe component through the handle component.

Inventors

WANG LUOWEI
XIN LEI
LIN HAN
WANG WEI
GAO YE
JIAO YUNFEI

Assignees

中国人民解放军海军军医大学

Dates

Publication Date: 20260512
Application Date: 20260109

Claims (10)

1. The magnetic control traction type tissue traction fixing clamp under the endoscope comprises a handle assembly, an outer tube assembly and a clamping assembly, and is characterized in that the outer tube assembly comprises a flexible outer tube, a pull rod and an adapter, the flexible outer tube is positioned at the outer side of the pull rod, and the adapter is fixed at the end part of the flexible outer tube; The handle assembly is used for controlling the opening and closing of the clamping assembly and the separation of the clamping assembly and the outer tube assembly, the handle assembly comprises a fixed handle and a movable handle which are connected in a sliding manner, the fixed handle comprises a fixed gripping part and a supporting rod part, and the supporting rod part is connected with one end of the flexible outer tube; the movable handle is sleeved on the outer side of the supporting rod part and is in sliding connection with the supporting rod part, and the movable handle is in transmission connection with one end of the pull rod; The clamping assembly further comprises a guide connector, a pull shaft, a first clamping jaw and a second clamping jaw, wherein the guide connector is spliced with the adapter, a first pin shaft is arranged on the guide connector, guide grooves used for penetrating through the first pin shaft are formed in the first clamping jaw and the second clamping jaw, and the guide grooves are used for opening and closing guide; the pull shaft axially slides in the guide joint, one end of the pull shaft is clamped with the pull rod, a second pin shaft is arranged at the other end of the pull shaft, the first clamping jaw and the second clamping jaw are hinged through the second pin shaft, a first notch and a second notch for switching and passing through the second pin shaft are formed in the first clamping jaw and the second clamping jaw, the first notch is adjacent to the guide groove, the second notch is far away from the guide groove, and the first notch and the second notch are mutually communicated to form a gourd-shaped opening; The opposite side of the guide joint is hinged with one end of a connecting rod through the first pin shaft, and the other end of the connecting rod is hinged with one end of a traction magnet through a third pin shaft; the central axes of the first pin shaft, the second pin shaft and the third pin shaft are parallel to each other, and the second pin shaft, the first pin shaft and the third pin shaft are arranged from back to front along the axial direction; The opening, closing and locking of the clamping assembly and the separation action of the clamping assembly and the handle assembly are realized through the axial movement of the movable handle of the handle assembly and the force applied to the second pin shaft.
2. The endoscopic magnetic control traction type tissue traction fixing clamp according to claim 1, wherein an elastic claw is axially inserted on the movable handle, and a limiting hole for clamping the elastic claw is formed in the outer wall of the movable handle; The elastic claw is provided with a through hole for penetrating through the pull rod, the end part of the pull rod is fixed with a limiting block, and the elastic claw is provided with a limiting groove for propping against the limiting block; The support rod part is provided with a sliding groove for sliding connection with the elastic claw, and the opposite sides of the support rod part are respectively detachably connected with a plugging piece and the fixed gripping part; The plugging piece is used for plugging the shaft end opening of the sliding groove, and is provided with a through hole for penetrating the pull rod.
3. The endoscopic magnetic control traction type tissue traction fixation clamp of claim 1, wherein the guide grooves on the first clamping jaw and the second clamping jaw are inclined inwards from the side close to the second pin shaft to the side far away from the second pin shaft, the included angle between the guide direction of the guide groove and the connecting line of the central axes of the first pin shaft and the second pin shaft is larger than 45 degrees, and the length of the guide groove is larger than 2 times of the diameter of the pin shaft and smaller than 3 times of the diameter of the pin shaft; the end part of the guide groove, which is far away from the second pin shaft, is in the same plane with the centers of the first notch and the second notch.
4. The endoscopic magnetic control traction type tissue traction fixation clamp of claim 1, wherein the first clamping jaw and the second clamping jaw comprise cylindrical clamping arms, the ends of the clamping arms far away from the first pin shaft are provided with radially inward clamping parts, and the clamping parts are mutually perpendicular to the length direction of the clamping arms; the end part of the clamping part, which is far away from the first pin shaft, is a convex curved surface.
5. The endoscopic magnetic control traction type tissue traction fixation clamp of claim 1, wherein the pull shaft is sequentially provided with a pull rod connecting part and a clamping piece connecting part along the axial direction; The outer diameter of the pull rod connecting part is smaller than that of the clamping piece connecting part; The pull rod connecting part is provided with a first notch, a clamping rod for clamping the pull rod is arranged in the first notch, and the end part of the pull rod is inserted into the first notch to be clamped with the clamping rod; The clamping piece connecting part is provided with a second notch, and the end parts of the first clamping jaw and the second clamping jaw are inserted into the second notch and hinged with the pull shaft through the second pin shaft; the inner wall of the guide joint is provided with an annular bulge, the inner diameter of the annular bulge is larger than the outer diameter of the pull rod connecting part, and the inner diameter of the annular bulge is smaller than the outer diameter of the clamping piece connecting part; The annular bulge is used for limiting and propping against the axial end face of the clamping piece connecting part.
6. The endoscopic magnetic control traction type tissue traction fixation clamp of claim 5, wherein a bayonet for clamping the clamping rod is formed at the end part of the pull rod.
7. The under-endoscope magnetically controlled traction type tissue traction fixation clamp of claim 1, wherein the traction magnet has an outer diameter not larger than an outer diameter of the guide joint.
8. The under-endoscope magnetically controlled traction type tissue traction fixation clamp of claim 1, wherein the guide joint, the connecting rod and the traction magnet are arranged along the axial direction of the endoscope channel when the clamping assembly is arranged in the endoscope channel in a penetrating way; And the first clamping jaw and the second clamping jaw are positioned between the connecting rods at two sides of the guide joint.
9. The endoscopic magnetic control traction type tissue traction fixation clamp of claim 1, wherein when the second pin shaft is positioned in the first notch and the movable handle slides forwards, the pull rod drives the pull shaft to move forwards, so that the first clamping jaw and the second clamping jaw are opened; When the second pin shaft is positioned in the first notch and the movable handle slides backwards, the pull rod drives the pull rod to move backwards, so that the first clamping jaw and the second clamping jaw are closed; when the movable handle continues to slide backwards, the second pin shaft slides into the second notch from the first notch, and the first clamping jaw and the second clamping jaw are locked; When the movable handle continues to slide backwards, the second pin shaft is positioned in the second notch, the pull rod is separated from the pull shaft, and the outer tube assembly is separated from the clamping assembly.
10. The system of claim 1, further comprising an external magnet located outside the body, wherein the external magnet is configured to magnetically attract the traction magnet, and wherein the external magnet magnetically attracts the traction magnet to adjust the position and direction of the clamping assembly.

Description

Magnetic control traction type tissue traction fixing clamp under endoscope and control system thereof Technical Field The invention relates to the technical field of medical instruments, in particular to a tissue fixing clamp. Background The endoscopic mucosa stripping (ESD) is a minimally invasive technique for completely stripping lesion mucosa from submucosa under an endoscope, is a selective diagnosis operation or radical treatment operation, and mainly aims to diagnose and treat early-stage digestive tract tumors, and has the advantages of completely cutting off superficial lesions of a certain area at one time, but has high technical requirements and great difficulty. Is suitable for diagnosis and treatment of early esophageal cancer, early gastric cancer, interstitial tumor and colon early tumor. Because the operation space is small, the visual field range is small, and after the mucous membrane is cut, if effective traction is not carried out, the operation visual field can be further reduced, great difficulty is increased for operation, and even the healthy mucous membrane is damaged due to the operation difficulty. At present, a tissue fixing clamp structure which can realize a series of actions of opening, clamping and locking of a clamping assembly and separation of the clamping assembly through a handle assembly while synchronously conveying the clamping assembly and a traction magnet through an endoscope channel and is convenient for adjusting the position direction is urgently needed. Disclosure of Invention The invention provides a magnetic control traction type tissue traction fixing clamp under an endoscope and a control system thereof, which aim to solve at least one technical problem. The magnetic control traction type tissue traction fixing clamp comprises a handle assembly, an outer tube assembly and a clamping assembly, wherein the outer tube assembly comprises a flexible outer tube, a pull rod and an adapter, the flexible outer tube is positioned at the outer side of the pull rod, and the adapter is fixed at the end part of the flexible outer tube; The handle assembly is used for controlling the opening and closing of the clamping assembly and the separation of the clamping assembly and the outer tube assembly, the handle assembly comprises a fixed handle and a movable handle which are connected in a sliding manner, the fixed handle comprises a fixed gripping part and a supporting rod part, and the supporting rod part is connected with one end of the flexible outer tube; the movable handle is sleeved on the outer side of the supporting rod part and is in sliding connection with the supporting rod part, and the movable handle is in transmission connection with one end of the pull rod; The clamping assembly further comprises a guide connector, a pull shaft, a first clamping jaw and a second clamping jaw, wherein the guide connector is spliced with the adapter, a first pin shaft is arranged on the guide connector, guide grooves used for penetrating through the first pin shaft are formed in the first clamping jaw and the second clamping jaw, and the guide grooves are used for opening and closing guide; the pull shaft axially slides in the guide joint, one end of the pull shaft is clamped with the pull rod, a second pin shaft is arranged at the other end of the pull shaft, the first clamping jaw and the second clamping jaw are hinged through the second pin shaft, a first notch and a second notch for switching and passing through the second pin shaft are formed in the first clamping jaw and the second clamping jaw, the first notch is adjacent to the guide groove, the second notch is far away from the guide groove, and the first notch and the second notch are mutually communicated to form a gourd-shaped opening; The opposite side of the guide joint is hinged with one end of a connecting rod through the first pin shaft, and the other end of the connecting rod is hinged with one end of a traction magnet through a third pin shaft; the central axes of the first pin shaft, the second pin shaft and the third pin shaft are parallel to each other, and the second pin shaft, the first pin shaft and the third pin shaft are arranged from back to front along the axial direction; The opening, closing and locking of the clamping assembly and the separation action of the clamping assembly and the handle assembly are realized through the axial movement of the movable handle of the handle assembly and the force applied to the second pin shaft. The invention controls the opening and closing of the clamping component and the separation of the clamping component and the outer pipe component through the handle component. The invention is convenient to realize magnetic control of the trend of the clamping assembly through the optimization of the clamping assembly. Further preferably, an elastic claw is axially inserted on the movable handle, and a limiting hole for clamping the elastic claw is formed in the oute