CN220236843U - Distal end cap and endoscope accessory - Google Patents

Abstract

The application discloses distal end cap and scope accessory, distal end cap includes the cap body and moving part, and the cap body includes first sleeve portion, second sleeve portion, holds chamber and apparatus passageway, and first sleeve portion is used for connecting the scope, and second sleeve portion is used for connecting the apparatus conveyer pipe, holds the chamber and is located one side that first sleeve portion is close to second sleeve portion, holds the chamber and the section of thick bamboo chamber of second sleeve portion by first through-hole intercommunication, holds the chamber and keep away from one side of first through-hole and set up spacedly. The instrument channel is located the one side that holds the chamber and keep away from first sleeve portion, and instrument channel's one end and the section of thick bamboo chamber intercommunication of second sleeve portion, the other end and uncovered intercommunication. The movable piece is located in the containing cavity and is rotationally connected with the cap body, and the movable piece comprises a pushing part extending to the opening and a connecting part used for connecting a traction wire penetrating through the first through hole. The distal end cap that this application provided is applicable to the auxiliary completion minimally invasive surgery operation, can simply effectively solve the problem that the required field of vision is often limited when doctor cuts submucosa.

Description

Distal end cap and endoscope accessory

Technical Field

The application relates to the technical field of medical equipment, in particular to a distal end cap and an endoscope accessory.

Background

In the diagnosis and treatment process of modern medicine, in order to meet the requirements of small surgical wound, light pain, quick postoperative recovery, attractive appearance and the like, minimally invasive surgery has an increasingly important role in the field of medical surgery. Taking Endoscopic Submucosal Dissection (ESD) as an example, a high-frequency electrotome and other special instruments are used under the endoscope to gradually strip the focus from the normal mucous membrane below the focus so as to achieve the aim of completely resecting the focus.

Currently, ESD is a condition in which the diseased tissue to be cut is in a naturally relaxed state, and the field of view required by a doctor to cut the submucosa is often limited, which easily causes bleeding and perforation due to misoperation. Therefore, how to simply and effectively overcome the above-mentioned drawbacks is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The application provides the following technical scheme:

a distal cap comprising a cap body and a moveable member, the cap body comprising:

a first sleeve part for connecting with an endoscope;

a second sleeve portion for connecting to an instrument delivery tube;

the accommodating cavity is positioned at one side of the first sleeve part, which is close to the second sleeve part, and is communicated with the cylinder cavity of the second sleeve part through a first through hole, and one side of the accommodating cavity, which is far away from the first through hole, is provided with an opening;

the instrument channel is positioned at one side of the containing cavity away from the first sleeve part, one end of the instrument channel is communicated with the cylinder cavity of the second sleeve part, and the other end of the instrument channel is communicated with the opening;

the movable piece is positioned in the containing cavity and is rotationally connected with the cap body, and the movable piece comprises a pushing part extending to the opening and a connecting part used for connecting a traction wire penetrating through the first through hole.

Optionally, in the distal cap described above, the instrument channel is provided as a curved path hole curved from the second sleeve portion to a side closer to the first sleeve portion.

Optionally, in the distal cap, a notch is provided on a side of the cap body away from the second sleeve portion, and the notch and the instrument channel meet at the opening.

Optionally, in the distal cap described above, the connecting portion includes a first path groove for winding the traction wire.

Optionally, in the distal cap, the first through hole includes a large diameter hole and a small diameter hole sequentially provided from the second sleeve portion to the cavity, and the large diameter hole is used for connecting with a wire sheath.

Optionally, in the distal cap, a limiting hole is provided at an end of the instrument channel near the second sleeve portion, and the limiting hole is used for connecting with an instrument sheath.

Optionally, in the distal cap described above, the cap body is cam-shaped or gourd-shaped in a viewing direction parallel to an axial direction of the first sleeve portion.

An endoscope accessory comprises an instrument conveying pipe, a traction wire and a distal end cap as disclosed in any one of the above, wherein one end of the instrument conveying pipe is connected with the second sleeve part, and the traction wire is positioned in the instrument conveying pipe and penetrates through the first through hole to be connected with the movable part.

Optionally, in the above endoscope accessory, further comprising:

a button mount located at an end of the instrument delivery tube distal from the distal cap;

the driving knob is rotationally connected with the knob seat, and one end of the traction wire, which is far away from the movable piece, is connected with the driving knob.

Optionally, in the above endoscope accessory, the endoscope accessory further comprises a locking knob, wherein the locking knob is arranged in the central hole of the driving knob in a penetrating way and is in threaded connection with the knob seat.

According to the technical scheme, the application provides a distal end cap, which comprises a cap body and a movable piece, wherein the cap body comprises a first sleeve part used for being connected with an endoscope, a second sleeve part used for being connected with an instrument conveying pipe, a containing cavity used for containing the movable piece and an instrument channel used for passing through an instrument. The holding cavity is communicated with the barrel cavity of the second sleeve part through the first through hole, and one side of the holding cavity, which is far away from the first through hole, is provided with an opening. One end of the instrument channel is communicated with the cylinder cavity of the second sleeve part, and the other end of the instrument channel is communicated with the opening. The movable piece comprises a pushing part extending to the opening and a connecting part used for connecting the traction wire penetrating through the first through hole, the movable piece is rotationally connected with the cap body, so that the movable piece can rotate relative to the cap body under the dragging of the traction wire, and the rotating movable piece extrudes the instrument through the pushing part to bend the instrument in a direction away from the endoscope, so that the instrument can lift up mucous membrane tissues in front of the endoscope, and the influence of the loosened mucous membrane tissues on the visual field required by operation is avoided. Therefore, the distal end cap provided by the application is suitable for assisting in completing minimally invasive surgery operation, and can simply and effectively solve the problem that the visual field required by a doctor when cutting submucosa is limited frequently.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of an endoscope assembly according to an embodiment of the present disclosure;

fig. 2 is a perspective view of the distal cap 1 of fig. 1;

fig. 3 is a perspective view of the first split 11 of fig. 2;

fig. 4 is a schematic perspective view of the second body 12 of fig. 2;

FIG. 5 is a cross-sectional view of the distal cap of FIG. 2;

fig. 6 is a perspective view of the movable member 8 in fig. 5;

fig. 7 is a schematic view of the mobile 8 in a first operating condition;

fig. 8 is a schematic view of the mobile 8 in a second operating condition;

fig. 9 is a perspective view showing the assembled locking knob 4, driving knob 5 and knob holder 6 of fig. 1;

FIG. 10 is a schematic view of the structure of FIG. 9 with the locking knob 4 removed;

fig. 11 is a perspective view of the knob seat 6 in fig. 10;

fig. 12 is a perspective view of the driving knob 5 in fig. 10;

FIG. 13 is a cross-sectional view of the structure shown in FIG. 9;

fig. 14 is a cross-sectional view of the structure shown in fig. 10.

Marked in the figure as:

1. a distal cap; 2. an endoscope; 3. an instrument delivery tube; 4. a locking knob; 5. driving a knob; 6. a button seat; 7. an endoscope operating handle; 8. a movable member; 9. a pin shaft;

11. a first split; 111. a notch; 112. an opening; 113. a first channel;

12. a second split; 121. a hinge hole; 122. a cavity; 123. a second channel; 124. an instrument channel; 1241. a limiting hole; 125. a first through hole; 1251. a large diameter hole; 1252. a small diameter hole;

13. a first sleeve portion; 14. a second sleeve portion;

81. a first path slot; 82. a first clamping groove; 83. a shaft hole;

200. an instrument; 300. traction wire;

51. a second path slot; 52. a second clamping groove;

61. a second through hole; 62. countersink; 63. hanging lugs; 64. and (3) a threaded hole.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1-8, the embodiment of the present application provides a distal cap 1, which includes a cap body and a movable member 8, wherein the cap body includes a first sleeve portion 13, a second sleeve portion 14, a cavity 122 and an instrument channel 124, and the movable member 8 is located in the cavity 122 and is rotationally connected with the cap body. The first sleeve part 13 is used for connecting the endoscope 2, the second sleeve part 14 is used for connecting the instrument conveying pipe 3, the accommodating cavity 122 is positioned on one side of the first sleeve part 13 close to the second sleeve part 14, the accommodating cavity 122 is communicated with the barrel cavity of the second sleeve part 14 through the first through hole 125, and the side of the accommodating cavity 122 far away from the first through hole 125 is provided with the opening 112. An instrument channel 124 is located on a side of the cavity 122 remote from the first sleeve portion 13, with one end of the instrument channel 124 communicating with the barrel cavity of the second sleeve portion 14 and the other end communicating with the opening 112. The movable member 8 includes a pushing portion extending to the opening 112 and a connecting portion for connecting the pulling wire 300 passing through the first through hole 125.

Before performing a surgical operation, the operator may sleeve the distal cap 1 over the end of the endoscope 2 and the instrument delivery tube 3, and may use medical tape or band to constrain the instrument delivery tube 3 outside the endoscope 2. The operator controls the endoscope 2 to enter the human body, and the distal end cap 1 moves along with the endoscope 2 to approach the target position. In the feedback endoscopic view, an instrument 200, such as a biopsy forceps, is advanced from the instrument delivery tube 3 and the instrument channel 124 of the distal cap 1 into the body, clamping mucosal tissue. As shown in fig. 7 and 8, the operator pulls the movable member 8 through the traction wire 300, so that the movable member 8 can rotate relative to the cap body, and the instrument 200 bends in a direction away from the endoscope 2 under the extrusion of the pushing portion of the movable member 8, so as to pick up the mucous membrane tissue, thereby avoiding the influence of the loose mucous membrane tissue on the visual field required by the operation. Therefore, the distal cap 1 provided by the application is suitable for assisting in completing minimally invasive surgery, and can simply and effectively solve the problem that the visual field required by doctors in cutting submucosa is often limited.

The manner in which the movable member 8 can be reset after the operator releases the pull wire 300 may be selected in a variety of ways to effect reset of the movable member 8. In a preferred embodiment, the instrument channel 124 is configured as a curved path opening that curves from the second sleeve portion 14 to a side adjacent the first sleeve portion 13, so that the resilience of the instrument 200 itself may be better utilized to reset the movable member 8. In other embodiments, the return of the movable member 8 may also be achieved by providing an elastic member, such as a torsion spring, between the movable member 8 and the cap.

Referring to fig. 2, 5 and 8, in order to allow greater bending of the instrument 200 by the moveable member 8, in this embodiment, the side of the cap body remote from the second sleeve portion 14 is provided with a notch 111, the notch 111 and the instrument channel 124 meeting at the opening 112.

Referring to fig. 5 to 7, in a preferred embodiment, the connection portion of the movable member 8 includes a first path groove 81 for winding the traction wire 300. Specifically, the first path groove 81 may be a circular groove that surrounds the rotation center of the movable member 8 for one full turn, may be an arc groove (for example, a half-turn groove) that does not form a full turn, or may be a spiral groove that surrounds more than one turn. In a preferred embodiment, the first through hole 125 includes a large diameter hole 1251 and a small diameter hole 1252 disposed in sequence from the second sleeve portion 14 to the chamber 122, the large diameter hole 1251 being for connection with the wire sheath. The wire sheath is relatively fixed with the cap body after being connected to the large-diameter hole 1251, and the inner wall of the wire sheath is smooth, so that the wire sheath protects the traction wire 300 on one hand and reduces the resistance in the moving process of the traction wire 300 on the other hand. Similarly, the end of the instrument channel 124 adjacent the second sleeve portion 14 is provided with a stop aperture 1241, the stop aperture 1241 being adapted for connection to an instrument sheath.

Referring to fig. 2-5, in the present embodiment, the cap body includes a first split body 11 and a second split body 12, the first split body 11 and the second split body 12 are connected along an axial direction of the first sleeve portion 13 by buckling, a first channel 113 of the first split body 11 and a second channel 123 of the second split body 12 together form a cylinder cavity of the first sleeve portion 13, and the second sleeve portion 14 is formed by a part of the second split body 12. In order to minimize the cross-sectional size of the cap, in this embodiment, the cap is cam-shaped or gourd-shaped in a viewing direction parallel to the axial direction of the first sleeve portion 13.

Referring to fig. 4-6, in this embodiment, in order to realize the rotational connection between the movable member 8 and the cap body, the second split body 12 is provided with a hinge hole 121, the movable member 8 is provided with a shaft hole 83, and the pin 9 mounted in the shaft hole 83 is rotationally connected to the hinge hole 121. Of course, in other embodiments, the pin 9 may be rotatably connected to the shaft hole 83 and fixedly connected to the mounting hole on the second component 12, so that the movable member 8 and the cap body can be rotatably connected.

The present application also provides an endoscopic accessory comprising an instrument delivery tube 3, a traction wire 300 and a distal cap 1 as disclosed in any of the embodiments above, one end of the instrument delivery tube 3 being connected to the second sleeve portion 14, the traction wire 300 being located in the instrument delivery tube 3 and being connected to the moveable member 8 through the first through hole 125. Since the distal end cap 1 disclosed in the above embodiment has the above technical effects, the endoscope fitting having the distal end cap 1 also has the above technical effects, and is not described herein again.

Referring to fig. 1 and 8-14, in order to facilitate driving the traction wire 300, in this embodiment, the endoscope accessory further includes: a button seat 6 positioned at one end of the instrument delivery tube 3 remote from the distal cap 1; the driving knob 5 is rotationally connected with the knob seat 6, and one end of the traction wire 300, which is far away from the movable piece 8, is connected with the driving knob 5. Specifically, the knob seat 6 may be provided in fixed connection with the proximal end of the instrument delivery tube 3, and an instrument inlet may be provided in the instrument delivery tube 3 at a position close to the knob seat 6. The button 6 may also be held relatively stationary with the instrument delivery tube 3 in use by being fixedly connected to the endoscope 2, for example by tying the button 6 to the endoscope operating handle 7 via a tie. The driving knob 5 is rotatably connected with the knob seat 6, and an operator can drag and release the movable member 8 in the distal cap 1 by operating the driving knob 5, for example, the operator rotates the driving knob 5 clockwise, the traction wire 300 is tensioned, the movable member 8 rotates along the stretching direction of the traction wire 300, and the pushing portion of the movable member 8 presses the instrument 200, so that the instrument 200 is locally bent and lifts up mucosal tissues, so as to obtain a clear submucosal view. Conversely, the operator rotates the driving knob 5 counterclockwise, the traction wire 300 is loosened, and the movable member 8 is automatically reset under the resilience force of the instrument 200 or the elastic member.

It will be readily appreciated that in order to cooperate with surgical instruments such as scalpels to perform surgical operations such as tissue cutting, the instrument 200 pressed by the movable member 8 should remain in a bent state, for which purpose a locking member may be provided on the knob seat 6 for limiting the relative movement of the drive knob 5 and the knob seat 6. For example, in this embodiment, the endoscope accessory further includes a locking knob 4, where the locking knob 4 is disposed through a central hole of the driving knob 5 and is screwed with the knob seat 6. When the locking knob 4 is screwed down, the driving knob 5 is tightly pressed on the knob seat 6 by the locking knob 4, so that the driving knob 5 cannot be rotated, and when the driving knob 5 needs to be operated, the locking knob 4 is unscrewed. In other embodiments, the locking member may be provided in other structures, for example, teeth are provided on the peripheral surface of the driving knob 5, a slider capable of moving along the radial direction of the driving knob 5 is provided on the knob seat 6, and the slider is provided with a locking portion capable of being locked with the teeth of the driving knob 5, so that locking and releasing of the driving knob 5 are achieved by pulling the slider.

Referring to fig. 6 and 12, in the present embodiment, the driving knob 5 is provided with the second path groove 51, similarly to the case where the movable member 8 is provided with the first path groove 81. In order to facilitate connection of the traction wire 300, a clamping groove may be provided on the path groove, where the clamping groove is used to clamp a fixing block at the end of the traction wire 300, for example, in this embodiment, the first path groove 81 is provided with the first clamping groove 82, and the second path groove 51 is provided with the second clamping groove 52.

Referring to fig. 11, 13 and 14, in this embodiment, the knob seat 6 is provided with a counterbore 62, the driving knob 5 is mounted in the counterbore 62 to be rotatably connected with the knob seat 6, the inner wall of the counterbore 62 is provided with a second through hole 61 for passing through the traction wire 300, and the second through hole 61 may have the same structure as the first through hole 125. The knob seat 6 is provided with a threaded hole 64, and the locking knob 4 passes through the central hole of the driving knob 5 to be screwed with the threaded hole 64. The both sides of button seat 6 are provided with hangers 63, and the ribbon can wind on hangers 63 with button seat 6 and scope operating handle 7 fixed connection.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A distal end cap comprising a cap body and a moveable member, the cap body comprising:

a first sleeve part for connecting with an endoscope;

a second sleeve portion for connecting to an instrument delivery tube;

the accommodating cavity is positioned at one side of the first sleeve part, which is close to the second sleeve part, and is communicated with the cylinder cavity of the second sleeve part through a first through hole, and one side of the accommodating cavity, which is far away from the first through hole, is provided with an opening;

the instrument channel is positioned at one side of the containing cavity away from the first sleeve part, one end of the instrument channel is communicated with the cylinder cavity of the second sleeve part, and the other end of the instrument channel is communicated with the opening;

the movable piece is positioned in the containing cavity and is rotationally connected with the cap body, and the movable piece comprises a pushing part extending to the opening and a connecting part used for connecting a traction wire penetrating through the first through hole.

2. The distal cap of claim 1, wherein the instrument channel is configured as a tortuous path bore that curves from the second sleeve portion to a side proximate the first sleeve portion.

3. The distal cap of claim 2, wherein a side of the cap body remote from the second sleeve portion is provided with a notch, the notch and the instrument channel meeting at the opening.

4. The distal cap of claim 1, wherein the connection portion comprises a first path slot for winding the pull wire.

5. The distal cap of claim 1, wherein the first through hole comprises a large diameter hole and a small diameter hole disposed in sequence from the second sleeve portion to the lumen, the large diameter hole for connection with a wire sheath.

6. The distal cap of claim 1, wherein an end of the instrument channel proximate the second sleeve portion is provided with a limiting aperture for connection with an instrument sheath.

7. The distal cap of any one of claims 1-6, wherein the cap body is cam-shaped or gourd-shaped in a viewing direction parallel to an axial direction of the first sleeve portion.

8. An endoscope accessory, comprising an instrument delivery tube, a traction wire and the distal cap of any one of claims 1-7, wherein one end of the instrument delivery tube is connected to the second sleeve portion, and the traction wire is positioned in the instrument delivery tube and connected to the movable member through the first through hole.

9. The endoscope assembly of claim 8, further comprising:

a button mount located at an end of the instrument delivery tube distal from the distal cap;

the driving knob is rotationally connected with the knob seat, and one end of the traction wire, which is far away from the movable piece, is connected with the driving knob.

10. The endoscopic accessory according to claim 9, further comprising a locking knob threaded through a central bore of the drive knob and in threaded connection with the knob seat.