CN219207086U

CN219207086U - Auxiliary traction device for endoscope treatment

Info

Publication number: CN219207086U
Application number: CN202223157418.2U
Authority: CN
Inventors: 练晶晶; 吴晓晨; 陈涛; 徐美东
Original assignee: Shanghai East Hospital Tongji University Affiliated East Hospital
Current assignee: Shanghai East Hospital Tongji University Affiliated East Hospital
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-06-20
Anticipated expiration: 2032-11-28

Abstract

The application discloses auxiliary traction device for endoscopic treatment, which comprises a clamping part, a pushing part and an operating part, wherein the pushing part comprises a catheter, a steel wire assembly and a traction wire, and a first through hole and a second through hole are respectively formed in one end, close to the clamping part, of a catheter body; one end of the steel wire component is detachably connected with the clamping piece component of the clamping part, and one end of the traction wire is connected with the sleeve of the clamping part; the operation part comprises a base, a connecting ring, a push-pull assembly and a rotating assembly, wherein the base is provided with an inner cavity and is provided with a window along the axial direction, and the connecting ring is used for connecting the base with the guide pipe; the push-pull assembly is connected with the other end of the steel wire assembly, and can move back and forth along the window; the rotating assembly is connected with the other end of the traction wire and connected with the base in a mode of rotating around the central shaft of the base, and the traction wire is driven to stretch and retract when the rotating assembly rotates.

Description

Auxiliary traction device for endoscope treatment

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an auxiliary traction device for endoscopic treatment.

Background

With the development of the endoscope treatment technology, the area of the focus of the endoscope treatment operation excision is larger and larger, the intervention depth is from the surface of the inner cavity of the digestive tube to break through the wall of the digestive tube, and the complete excision of the focus with large area faces greater challenges and difficulties: in the process of separating large-area focus tissues from the digestive canal wall, the target tissues to be separated are covered on the incision due to gravity or tissue elasticity, so that the space and the visual field of the endoscopic treatment operation are limited, and the progress of the treatment operation is difficult and the time is prolonged; the endoscope operator is therefore required to perform an external traction, lifting the tissue overlying the incision to assist the treatment procedure.

The conventional auxiliary traction device for endoscope treatment is mostly composed of a tissue clamping device (an operation part, a pushing part, a clamping part) and a traction wire. The tissue clamp device enters through the instrument channel of the endoscope, wherein the clamping part extends out of the front end of the endoscope, the traction wire is arranged outside the endoscope, one end of the traction wire is bound on the clamping part of the tissue clamp device, and the tissue clamp device and the traction wire are sent into the body together through the endoscope. The tissue clamping device is guided to approach the target tissue along the moving direction of the endoscope, the tissue clamping device is operated to guide the clamping part to clamp the target tissue, then the clamping part of the tissue clamping device is released, the traction wire is fixed at the target tissue position along with the clamping part, and the rest part of the tissue clamping device is withdrawn from the body. An operator holds one end of the traction wire to pull and pull the tissue outside the body, so that the tissue clamped by the clamping part is lifted towards the outside of the body.

The conventional auxiliary traction device for endoscope treatment needs to penetrate the tissue clamp device from the instrument channel of the endoscope until the tissue clamp device extends out of the port of the instrument channel, and then the traction wire is bound on the clamping part, so that the installation step is complicated. In addition, because the existing device is used for connecting internal tissues by external traction, the traction use effect of the two-point connecting line only has one traction direction, and the clinical practical traction requirement cannot be met. The adjustment of the jaw direction is also performed only by manipulating the endoscope in the adjustment direction to guide the approach to the target tissue, and then releasing the jaw portion is performed, which is inconvenient. Therefore, the existing device cannot meet the clinical actual demands, and an improved auxiliary traction device for endoscope treatment is urgently needed, so that the technical problems can be solved.

Disclosure of Invention

In view of the defects in the prior art, the utility model provides an auxiliary traction device for endoscopic treatment, which can conveniently adjust the traction direction of target tissues.

In order to achieve the above object, the present utility model provides the following technical solutions:

an auxiliary traction device for endoscope treatment comprises a clamping part, a pushing part and an operating part, wherein the clamping part comprises a clamping piece assembly and a sleeve, the sleeve is provided with an inner cavity, and the clamping piece assembly can move along the inner cavity of the sleeve; the pushing part comprises a guide pipe, a steel wire assembly and a traction wire, and a first through hole and a second through hole are respectively formed in one end, close to the clamping part, of the pipe body of the guide pipe; one end of the steel wire component is detachably connected with the clamping piece component of the clamping part, and the other end of the steel wire component is arranged in the inner cavity of the catheter in an extending way; one end of the traction wire is connected with the sleeve of the clamping part, and the other end of the traction wire is arranged in an extending way in the inner cavity of the catheter after passing through the first through hole and the second through hole respectively; the operation part comprises a base, a connecting ring, a push-pull assembly and a rotating assembly, wherein the base is provided with an inner cavity and is provided with a window along the axial direction, and the connecting ring is used for connecting the base with the guide pipe; the push-pull assembly is connected with the other end of the steel wire assembly, the push-pull assembly can move back and forth along the window, and the steel wire assembly moves along with the push-pull assembly and drives the clamping piece assembly of the clamping part to release or clamp tissues; the rotating assembly is connected with the other end of the traction wire and connected with the base in a mode of rotating around the central shaft of the base, and drives the traction wire to stretch and move when rotating, so that a catheter of the traction propulsion part curls or stretches to adjust the orientation of the clamping part.

Preferably, the mounting seat is arranged along the radial direction of the base, the mounting seat is provided with a traction wire duct and a connecting duct, the traction wire duct can be used for the traction wire to pass through, and the connecting duct is rotatably connected with the rotating assembly.

Preferably, the rotating assembly comprises a rotating operation ring and a connecting bolt, and the rotating operation ring is connected with the mounting seat through the connecting bolt.

Preferably, the push-pull assembly comprises a pair of symmetrically arranged push-pull operation rings and a middle beam, wherein the push-pull operation rings are respectively fixed at two ends of the middle beam, the middle beam is provided with a middle channel and a lock plunger, the middle channel can be used for the base to pass through, the lock plunger can be inserted into a window of the base, and the lock plunger is connected with the other end of the steel wire assembly.

Preferably, the clamping portion further comprises a clamping hook, the clamping hook is connected with the sleeve, and the auxiliary traction device for the endoscope treatment can be installed at the front end position of the endoscope.

Preferably, the hook comprises a vertical part and a bending part extending from one end of the vertical part, the vertical part is connected with the sleeve, and the bending part freely extends along the outer wall of the sleeve.

Preferably, the clamping piece assembly comprises a pair of symmetrically arranged clamping pieces, a connecting arm and a clamping buckle, wherein the connecting arm is a symmetrically bent and outwardly-stretched elastic piece, and two ends of the connecting arm are respectively connected with the symmetrically arranged clamping pieces; the clamping buckle is arranged at the bottom of the connecting arm, one end of the clamping buckle is open, and the clamping buckle is detachably connected with one end of the steel wire assembly.

Preferably, a bolt seat is arranged along the radial direction of the sleeve from the bottom wall of the inner cavity of the sleeve, and a pair of bosses are symmetrically arranged on the left cavity wall and the right cavity wall of the inner cavity of the sleeve; one end of the inner cavity of the sleeve, which is close to the catheter, is provided with a traction wire connecting point, and the sleeve is connected with the traction wire through the traction wire connecting point.

Preferably, the traction wire is dental floss.

The auxiliary traction device for the endoscope treatment is provided with the push-pull assembly and the rotating assembly in a matched manner, so that the push-pull assembly drives the steel wire assembly to move forwards and backwards to drive the clamping piece assembly of the clamping part to release or clamp tissues; the rotary component penetrates through the traction wire of the catheter body to conduct telescopic movement, and adjustment of the tissue traction direction is achieved. The auxiliary traction device for the endoscope treatment is characterized in that the traction wire is curled to drive the clamping part to adjust the traction direction, so that the traction direction of the target tissue can be adjusted without adjusting the direction of the endoscope. The auxiliary traction device for the endoscope treatment provided by the utility model can be conveniently arranged outside an endoscope, can improve the working efficiency, can be externally arranged to be matched with the endoscope with a single instrument channel for use, and has a wider application range.

Drawings

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

Fig. 1 is a perspective view of an endoscopic treatment auxiliary traction device in an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of an endoscopic treatment assistance traction device in an embodiment of the present utility model.

Fig. 3 is a radial cross-sectional view of the jaw portion of an embodiment of the present utility model, with the left hand view showing the clamping assembly in a released state and the right hand view showing the clamping assembly in a clamped state.

Fig. 4 is a view showing a catheter bending operation state of the auxiliary traction device for endoscopic treatment according to the embodiment of the present utility model.

Fig. 5 is a view showing a state where the jaws of the auxiliary traction device for endoscopic treatment are separated in the embodiment of the present utility model.

Fig. 6 is a schematic view of an endoscopic treatment auxiliary traction device according to an embodiment of the present utility model.

Detailed Description

The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present utility model with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the utility model.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.

According to one general technical concept of the present utility model, there is provided an endoscope treatment auxiliary traction device, including a jaw portion, a pushing portion and an operating portion, wherein the jaw portion includes a clip assembly and a sleeve, the sleeve is formed with an inner cavity, and the clip assembly is movable along the sleeve inner cavity; the pushing part comprises a guide pipe, a steel wire assembly and a traction wire, and a first through hole and a second through hole are respectively formed in one end, close to the clamping part, of the pipe body of the guide pipe; one end of the steel wire component is detachably connected with the clamping piece component of the clamping part, and the other end of the steel wire component is arranged in the inner cavity of the catheter in an extending way; one end of the traction wire is connected with the sleeve of the clamping part, and the other end of the traction wire is arranged in an extending way in the inner cavity of the catheter after passing through the first through hole and the second through hole respectively; the operation part comprises a base, a connecting ring, a push-pull assembly and a rotating assembly, wherein the base is provided with an inner cavity and is provided with a window along the axial direction, and the connecting ring is used for connecting the base with the guide pipe; the push-pull assembly is connected with the other end of the steel wire assembly, the push-pull assembly can move back and forth along the window, and the steel wire assembly moves along with the push-pull assembly and drives the clamping piece assembly of the clamping part to release or clamp tissues; the rotating assembly is connected with the other end of the traction wire and connected with the base in a mode of rotating around the central shaft of the base, and drives the traction wire to stretch and move when the rotating assembly rotates, so that a catheter of the traction propulsion part curls or stretches to adjust the orientation of the clamping part.

As shown in fig. 1 to 3, in the embodiment of the present utility model, the auxiliary traction device for endoscopic treatment includes a jaw portion 100, a pushing portion 200 and an operating portion 300.

In an embodiment of the present utility model, jaw 100 includes a clip assembly 110 and a sleeve 120. The sleeve 120 defines an interior cavity along which the clip assembly 110 is movable along the sleeve 120.

In some preferred embodiments, the clamping portion 100 further includes a hook 130, and the hook 130 is connected to the sleeve 120. Since the hook 130 is connected with the sleeve 120 and the sleeve 120 is connected with the pushing portion 200 and the operating portion 300, the auxiliary traction device for endoscope treatment according to the embodiment of the utility model can be integrally arranged at the front end position of the endoscope. The clamping hook structure can facilitate an operator to rapidly install the auxiliary traction device for endoscope treatment, and the working efficiency is improved. The hook 130 is mounted at the front end of the endoscope, such as a transparent cap provided at the front end of the endoscope.

In some preferred embodiments, the hook 130 includes a vertical portion 131 and a bending portion 132 extending from one end of the vertical portion 131. The vertical portion 131 is connected to the sleeve 120, for example, the vertical portion 131 is provided with a screw thread, the sleeve 120 is provided with a screw hole, and the vertical portion 131 is connected to the sleeve 120 by the screw thread. The bending portion 132 extends freely along the outer wall of the sleeve 120, and to enhance the hooking effect, the bending portion 132 may be made of an elastic material.

In some preferred embodiments, as shown in FIG. 3, the clip assembly 110 includes a pair of symmetrically disposed clips 111, connecting arms 112, and snap fasteners 113. The connecting arm 112 is a symmetrically curved and outwardly stretched elastic piece, and the two clamping pieces 111 are respectively connected with two ends of the connecting arm 112. A clamping buckle 113 is arranged at the bottom of the connecting arm 112, and the clamping buckle 113 is provided with an opening at one end. One end of the steel wire assembly 220 is connected with the clamping buckle 113, and can be separated from the opening of the clamping buckle 113 under a certain acting force, namely, the clamping buckle 113 is detachably connected with the steel wire assembly 220. For example, one end of the wire assembly 220 is provided with a locking pin 221, the locking pin 221 is connected to the locking buckle 113, and when a force applied to the other end of the wire assembly 220 exceeds a connection force between the locking pin 221 and the locking buckle 113, the locking pin 221 is separated from the locking buckle 113, thereby separating the wire assembly 220 from the clip assembly 110 (or the jaw 100).

In some preferred embodiments, the snap fastener may be made of a material having excellent mechanical strength, such as polyethylene. The opening of the snap-in button 113 may be a semi-open circular hole or oblong hole design to accommodate the snap-in pin 221 of the wire assembly 220.

In some preferred embodiments, the bottom wall of the inner cavity of the sleeve 120 is provided with a bolt seat 121 along the radial direction of the sleeve 120, and the left cavity wall and the right cavity wall of the inner cavity of the sleeve are symmetrically provided with a pair of bosses 122. The bolt seat 121 and the pair of bosses 122 can restrain and lock the connecting arm 112 of the clip assembly 110 when the clip assembly 110 is pulled to move by the wire assembly 220. The bolt seat 121 may also be inserted into the vertical portion 131 of the hook 130, so that the hook 130 is connected to the sleeve 120. The end of the lumen of the sleeve 120 adjacent the catheter 210 is provided with a pull wire connection point through which the sleeve 120 is connected to the pull wire 230. After the traction wire 230 is connected with the sleeve 120, the traction wire 230 drives the guide tube 210 to curl when being pulled, and drives the sleeve 120 and the clamping piece assembly 110 to curl accordingly, so that the whole curling of the clamping jaw part 100 is realized to adjust the clamping direction, and the traction of different angles to tissues is facilitated.

When the jaw 100 is used to clamp tissue, the push-pull ring 331 is pushed back and the traction wire assembly 220 pulls the jaw assembly 110. The arched bottom of the connecting arm 112 of the clamping piece assembly 110 is extruded by a pair of bosses 122 arranged on the left cavity wall and the right cavity wall of the sleeve 120, and is elastically deformed, and two ends of the opening of the connecting arm 112 drive the two clamping pieces to fold inwards; the arched bottom of the connecting arm 112 passes over the pair of bosses 122 until the curved portions at the middle of the two wings of the connecting arm 112 enter between the bosses, and the connecting arm 112 can be restrained and locked, so that the two clamping pieces can be kept in a clamped state. Continuing to push and pull the operating ring 331 backward, the steel wire assembly 220 is controlled to move backward, and when the pulling force applied to the steel wire assembly 220 is greater than the deformation limit of the opening of the clamping buckle 113, the clamping bolt 221 of the steel wire assembly 220 is separated from the clamping buckle 113, so that the clamping piece assembly 110 is separated from the steel wire assembly 220 of the pushing part 200.

In an embodiment of the present utility model, as shown in fig. 1-5, the pusher 200 includes a catheter 210, a wire assembly 220, and a pull wire 230.

The end of the catheter 210 near the clamping portion 100 is provided with a first through hole and a second through hole, respectively, through which the traction wire 230 can pass. In the illustrated embodiment, the first through hole and the second through hole are axially arranged along the catheter 210, but the present utility model is not limited thereto and may be arranged according to practical requirements.

One end of the wire assembly 220 is detachably connected to the clip assembly 110, for example, one end of the wire assembly 220 is provided with a locking bolt 221, and the locking bolt 221 can be connected to a locking buckle 113 provided at the bottom of the connecting arm 112 of the clip assembly 110. The other end of the wire assembly 220 extends within the lumen of the catheter 210 until it is drivingly connected to the push-pull assembly 330 of the operating portion 300. That is, the wire assembly 220 can move back and forth in the inner cavity of the catheter 210 of the pushing part 200 under the driving action of the push-pull assembly 330, and the wire assembly 220 can move back and forth under the driving action, so that the clip assembly 110 detachably connected with the wire assembly 220 can be driven to move back and forth, thereby releasing or clamping tissues. When the wire assembly 220 is driven to move backward to a certain position, the locking pin 221 of the wire assembly 220 is separated from the locking buckle 113 at the bottom of the connecting arm 112 of the jaw assembly 110, thereby separating the wire assembly 220 from the jaw assembly 110 (or the jaw 100). In some preferred embodiments, the wire assembly 220 is made of stainless steel and can quickly transmit the force applied by the operator.

One end of the pulling wire 230 is connected to the sleeve 120 of the jaw 100, and the other end of the pulling wire 230 is disposed to extend through the inner cavity of the catheter 210 after passing through the first through hole and the second through hole provided on the shaft of the catheter 210, and is finally connected to the rotating unit 340 of the operating unit 300. That is, one end of the pull wire 230 is connected to the lumen of the sleeve 120, then passes from the lumen of the catheter 120 through the first through-hole to the outside of the catheter 120, and then passes from the outside of the catheter 120 through the second through-hole back to the lumen of the catheter 120 again. For example, the sleeve 120 is provided with a traction wire connection point to which one end of the traction wire 230 is connected. The pulling wire 230 moves telescopically under the rotation of the rotating unit 340 of the operating unit 300, and when the rotating driver 320 rotates positively, the pulling wire 230 is driven to shrink, the extension length of the pulling wire 230 outside the tube body of the catheter 210 is gradually shortened until the extension length is shorter than the distance between the first through hole and the second through hole on the tube body of the catheter 210, and the tube body of the catheter 210 between the two through holes is curled, so that the pulling catheter 210 or the jaw 100 is curled. Crimping of the catheter 210 or jaw 100 may facilitate operator adjustment of the direction of pulling on the target tissue to perform the intraoperative procedure. When the rotary driver 320 rotates reversely, the traction wire 230 is driven to extend, the extension length of the traction wire 230 outside the catheter 210 is gradually extended until the extension length is longer than the catheter 210, and when the traction wire is extended, the external or internal direction traction can be performed on the tissue manually through the grasping operation portion. After the wire assembly 220 is separated from the clip assembly 110, the body of the sleeve 120 is also separated from the catheter 210, except that the pull wire 230 is still connected to the pull wire connection point of the sleeve 120, so that the operator can still pull the sleeve 120 by means of the pull wire to pull the clip assembly 110 for clipping the tissue in different directions. In some preferred embodiments, the pull wire may be a dental floss. The dental floss material is tough and wear-resistant, and can firmly penetrate through the connecting conduit 210 and other parts, and rapidly transfer traction force.

In the embodiment of the present utility model, the operation part 300 includes a base 310, a connection ring 320, a push-pull assembly 330 and a rotation assembly 340. The base 310 is formed with an inner cavity 311 and is provided with a window 312 along the axial direction, and the window 312 is used for inserting the push-pull assembly 330 and moving back and forth along the window 312. The connection ring 320 connects the base 310 with the guide tube 210 of the propelling part 200, i.e. the connection ring 320 is formed with an inner cavity, and the guide tube 210 is connected with the inner end of the base 310.

In some preferred embodiments, a mounting seat 313 is provided radially from the wall of the cavity of the base 310 at the distal end thereof, the mounting seat 313 being provided with a pull wire channel 313a and a connecting channel 313b. The pull wire hole 313a allows the pull wire 230 to pass through, i.e. the other end of the pull wire passes through the first through hole and the second through hole of the catheter 210, then passes through the middle channel of the center sill 332, and then passes through the pull wire hole 313a to connect with the rotating component 340. The connection hole 313b is rotatably connected to the rotation assembly 340. The connection mode can be rotated, so that when the rotating component 340 rotates around the connection hole 313b, the traction wire 230 connected with the rotating component is driven to rotate, and the telescopic movement of the length of the traction wire 230 is realized, namely, the length of the traction wire on the outer wall of the catheter 210 is shortened or lengthened through the rotation of the rotating component 340. When the length of the pulling wire 230 is shorter than the length of the tube body between the two through holes on the catheter 210, the pulling wire 230 can drive the catheter 210 to curl, and then drive the clamping portion 100 to move, so as to finally realize adjustment of the pulling direction of the target tissue. When the length of the pulling wire 230 is longer than the length of the tube body between the two through holes of the catheter 210, the catheter 210 can be manually driven to move in the in-vivo or in-vitro direction, and driving force can be transmitted to the pulling wire 230, so that the jaw 100 can be adjusted to pull the tissue.

In some preferred embodiments, the rotating assembly 340 includes a rotating operating ring 341 and a connecting pin 342. After the rotary operation ring 341 is inserted into the connection hole 313b, the rotary operation ring is connected to the mount 313 by the connection pin 342. The rotating operation ring 341 is rotatable along the center of the connection hole 313b. The handle end of the connection pin 342 is connected to the traction wire 230 passing through the traction wire hole 313a, and the traction wire 230 can be received in the handle end of the connection pin 342 by rotating the operation ring 341.

The push-pull assembly 330 is connected to the other end of the wire assembly 220, and the push-pull assembly 330 can move back and forth along the fenestration 3122. The push-pull assembly 330 moves back and forth along the window 312, driving the wire assembly 220 connected thereto to move back and forth, and the wire assembly 220 in turn driving the clip assembly detachably connected thereto to move back and forth, thereby releasing or clamping the target tissue. In some preferred embodiments, the push-pull assembly 330 includes a pair of symmetrically disposed push-pull operating rings 331 and a center sill 332. The push-pull operation ring 331 is operable with a finger portion at the time of operation. The push-pull rings 331 are respectively fixed at two ends of the middle beam 332, and the middle beam 332 is provided with a middle channel and a lock bolt, and the middle channel can be matched with the base 310 for inserting the base 310. In general, the central passage of the center sill 332 is disposed in perpendicular intersection with the fenestration 312 of the base 310. The lock 333 of the middle beam 332 can be inserted into the window 312 of the base 310, on one hand, the lock 333 is matched with the window 312 to limit the whole push-pull assembly 330 to move back and forth along the window 312, and on the other hand, the lock is connected with the other end of the wire assembly 220, so that when the push-pull operation ring 331 drives the middle beam 332 to move back and forth, the lock of the middle beam 332 drives the wire assembly 220 to move back and forth.

With reference to fig. 4 to 6, an operation method of the auxiliary traction device for endoscopic treatment according to the embodiment of the present utility model will be described. It should be noted that the present operation method is only exemplary, and the present utility model is not limited thereto.

Installing an endoscope treatment auxiliary traction device: the operator positions the entire endoscope treatment auxiliary traction device at the front end position of the endoscope (e.g., transparent cap) through the hook 130. The two clamping pieces of the clamping piece assembly 110 of the clamping piece part 100 are folded towards the center, namely in a clamping mode, so that the clamping piece assembly can conveniently pass through a human body cavity.

Pushing the endoscope: the operator inserts the endoscope through the body cavity, the jaw portion 100 and the pushing portion 200 follow the endoscope into the body to the target tissue, and the operation portion 300 remains outside the body. After the endoscope reaches the target position, the endoscope position is kept unchanged, and the pushing part 200 is pushed forward, so that the clamping hooks 30 slide out of the transparent caps of the endoscope, and the whole auxiliary traction device for the endoscope treatment is separated from the endoscope.

The jaw portion opens: the operator pushes the push-pull operation ring 331 forward to the front end position of the base 310 (i.e., near to the end of the pushing portion 200), and the push-pull operation ring 331 drives the two jaws of the jaw assembly 110 of the jaw portion 100 to open by transmitting a pushing force through the wire assembly 220 connected thereto.

The direction of the clamp is adjusted by the traction wire: operation of the rotating operating ring 341 contracts the pull wire 230, and when the length of the outer wall of the catheter 210 is smaller than the distance between the two openings in the catheter 210, the pull wire 230 extends to cause the catheter 210 to curl between the two openings, so as to control the jaw 100 to approach the target tissue.

The jaw portion clamps tissue: after the jaw 100 reaches the target position, the push-pull operating ring 331 is pushed backward to move toward the rear end position of the base 310 (i.e., toward one end of the rotary operating ring 341). When the push-pull operation ring 331 moves, the steel wire pulling assembly 220 pulls the clamping piece assembly 110, the arched bottom of the connecting arm 112 of the clamping piece assembly 110 is extruded by a pair of bosses 122 arranged on the left cavity wall and the right cavity wall of the sleeve 120, elastic deformation is generated, and two ends of an opening of the connecting arm 112 drive the two clamping pieces to fold inwards; the arched bottom of the connecting arm 112 passes over the pair of bosses 122 until the curved portions at the middle of the two wings of the connecting arm 112 enter between the bosses, and the connecting arm 112 can be restrained and fixed, so as to keep the two clamping pieces in a closed state. Continuing to push back and pull the operating ring 331, when the pulling force applied to the wire assembly 220 is greater than the deformation limit of the opening of the snap fastener 113, the snap pin 221 of the wire assembly 220 is disengaged from the snap fastener 113, thereby separating the jaw 100 from the pushing portion 200. I.e. the jaw direction is adjusted by the pull wire so that the jaw portion can reach the target tissue site.

The traction wire further adjusts the clamping direction: the jaw 100 holds and locks the target tissue, and the operator rotates the extension pulling wire in the opposite direction by rotating the operating ring 341 to perform the external pulling in the optional external or internal direction. When the direction of the jaws is further adjusted, the traction wire is kept in an elongated state, and is pulled in the direction of the body by the pulling force applied by the manual holding operation part 300, and the target tissue clamped by the jaw part 100 is driven to be lifted in the direction of the body by the traction wire 230; the pushing force applied by the grip operation portion 300 is pushed in the external direction, and is converted into a pulling force by the pulling wire 230 under the action of the catheter 210 as a fulcrum, so as to drive the target tissue clamped by the jaw portion 100 to rise in the external direction. It should be noted that, in-vivo direction and in-vitro direction refer to directions of tissues relative to an operator, wherein, in-vivo direction refers to directions close to the operator, and in-vitro direction refers to directions away from the operator. Either "in vivo direction" or "in vitro direction" is intended to open tissue. In practice, the direction of tissue incision may be divided into incision from the inside of the body and incision from the outside of the body. If the incision is made from the inner side of the body, the traction direction is to draw the body outwards; if the incision is made from the outside of the body, the pulling direction is to pull the body. When the tissue opening is large, the tissue can be lifted or covered for a specific intraoperative operation by further adjusting the pulling direction of the jaws on the tissue. As shown in the rightmost drawing of fig. 6, when the tissue is incised from the inside of the body and the pulling wire 230 is extended, the guide tube 210 is pushed forward by the hand by the operation part 300, and then the pulling wire 230 and the jaw part 100 connected with the pulling wire 230 are driven to move, thereby pulling the tissue to the outside of the body and achieving the purpose of opening the tissue.

Those skilled in the art will appreciate that the embodiments described above are exemplary and that modifications may be made by those skilled in the art, and that the structures described in the various embodiments may be freely combined without conflict in terms of structure or principle.

Although the present utility model has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate preferred embodiments of the utility model and are not to be construed as limiting the utility model.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. The utility model provides an auxiliary traction device of endoscope treatment, includes jaw portion, propulsion unit and operating portion, its characterized in that:

the clamping part comprises a clamping piece assembly and a sleeve, wherein an inner cavity is formed in the sleeve, and the clamping piece assembly can move along the inner cavity of the sleeve;

the pushing part comprises a guide pipe, a steel wire assembly and a traction wire, and a first through hole and a second through hole are respectively formed in one end, close to the clamping part, of the pipe body of the guide pipe; one end of the steel wire component is detachably connected with the clamping piece component of the clamping part, and the other end of the steel wire component is arranged in the inner cavity of the catheter in an extending way; one end of the traction wire is connected with the sleeve of the clamping part, and the other end of the traction wire is arranged in an extending way in the inner cavity of the catheter after passing through the first through hole and the second through hole respectively;

the operation part comprises a base, a connecting ring, a push-pull assembly and a rotating assembly, wherein an inner cavity is formed in the base, a window is formed in the base along the axial direction, and the connecting ring is used for connecting the base with the catheter; the push-pull assembly is connected with the other end of the steel wire assembly, the push-pull assembly can move back and forth along the windowing, and the steel wire assembly moves along with the push-pull assembly and drives the clamping piece assembly of the clamping piece part to release or clamp tissues; the rotating assembly is connected with the other end of the traction wire and is connected with the base in a mode of rotating around the central shaft of the base, and the rotating assembly drives the traction wire to stretch and retract when rotating, so that the catheter of the pushing part is pulled to curl or stretch to adjust the orientation of the clamping part.

2. An auxiliary traction device for endoscope treatment according to claim 1 and wherein a mounting seat is provided along the radial direction of said base, said mounting seat being provided with a traction wire duct through which said traction wire can pass and a connecting duct rotatably connected to said rotating assembly.

3. An endoscope treatment assistance traction device according to claim 2, wherein the rotation assembly comprises a rotation operation ring and a connection bolt, the rotation operation ring being connected with the mounting base through the connection bolt.

4. An endoscope treatment auxiliary traction device according to any of claims 1-3 and wherein said push-pull assembly comprises a pair of symmetrically arranged push-pull operating rings and a center sill, said push-pull operating rings being respectively fixed at both ends of said center sill, said center sill being provided with a center passage through which said base is passed and a lock bolt which is insertable into a fenestration of said base, said lock bolt being connected to the other end of said wire assembly.

5. An auxiliary traction device for endoscope treatment according to claim 1 and wherein said jaw portion further comprises a hook, said hook being connected to said sleeve for mounting said auxiliary traction device for endoscope treatment at the front end of an endoscope.

6. The auxiliary traction device for endoscopic treatment according to claim 5, wherein the hook comprises a vertical portion and a bending portion extending from one end of the vertical portion, the vertical portion is connected with the sleeve, and the bending portion freely extends along the outer wall of the sleeve.

7. The auxiliary traction device for endoscopic treatment according to claim 1, wherein the clamping piece assembly comprises a pair of symmetrically arranged clamping pieces, a connecting arm and a clamping buckle, the connecting arm is a symmetrically bent and outwardly stretched elastic piece, and two ends of the connecting arm are respectively connected with the symmetrically arranged clamping pieces; the clamping buckle is arranged at the bottom of the connecting arm, one end of the connecting arm is open, and the clamping buckle is detachably connected with one end of the steel wire assembly.

8. An auxiliary traction device for endoscope treatment according to claim 1 or 7 and wherein a bolt seat is provided along the radial direction of the sleeve from the bottom wall of the sleeve inner cavity, and a pair of bosses are symmetrically provided on the left cavity wall and the right cavity wall of the sleeve inner cavity; and a traction wire connecting point is arranged at one end of the inner cavity of the sleeve, which is close to the catheter, and the sleeve is connected with the traction wire through the traction wire connecting point.

9. An endoscope treatment assistance traction device according to claim 1, wherein said traction wire is dental floss.