CN210612180U

CN210612180U - Ligator and closing device for digestive endoscope

Info

Publication number: CN210612180U
Application number: CN201920864583.0U
Authority: CN
Inventors: 杨勇致
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-05-26
Anticipated expiration: 2029-06-11

Abstract

The utility model provides a ligator and a closing device for a digestive endoscope, wherein the ligator is used for matching with the closing device, and the closing device comprises a sheath tube, an inner core wire penetrating through two ends of the sheath tube, and an in vitro operation assembly for changing the relative position and the relative angle of the inner core wire and the sheath tube; the ligator comprises an installation part, a main body line and a sliding clamping sleeve, wherein the positioning end of the main body line is connected to the installation part or the sliding clamp to enable the main body line to be folded in half to form a ring, the sliding clamping sleeve is used for changing the closing position of the ring, the inner wall of the sliding clamping sleeve is provided with ratchets, ratchet grooves matched with the ratchets are arranged on the main body line, and the sliding clamping sleeve can slide along the outer wall of the ring in a single direction. During operation, the sliding clamping sleeve slides under the pushing of the sheath tube and tightens the ring. The utility model discloses a ligature ware and closing device for digestive endoscopy, the ring cover of ligature ware when the basement position, slip cutting ferrule can not reverse slip, and the ring is difficult for taking off from the focus pine, is favorable to the more reliable closure in focus position.

Description

Ligator and closing device for digestive endoscope

Technical Field

The utility model relates to a medical instrument, in particular to a ligator and a closing device for a digestive endoscope.

Background

In digestive tract tumors, the incidence of gastric cancer and colorectal cancer is the second and fourth of the incidence of tumor in China, and part of early gastric cancer and colorectal cancer can be treated by an endoscope during early treatment, so that the wound surface is small.

To date, the more mature Endoscopic surgical techniques include Endoscopic Mucosal Resection (EMR), Endoscopic Submucosal Dissection (ESD), Submucosal tunneling resection (STER), which are more mature, but are limited to the superficial layer of the wall of the digestive tract, i.e., the mucosal layer and the superficial layer under the mucosal membrane, and cannot treat the deeper lesions under the mucosal layer originating from the intrinsic basement layer, so that the full-thickness resection (EFTR) has become a focus of research in global Endoscopic surgery in recent years.

There are two main surgical approaches to EFTR:

one is exposure, which involves excision of the lesion followed by closure of the incision. Although the exposure method can achieve the purpose of full-thickness resection, the defect is huge, on one hand, the visual field of the endoscope is difficult to ensure, the operation visual field of the endoscope cannot be ensured due to gastrointestinal wall defect and air leakage in the operation, the gastrointestinal wall cavity collapses, and the operation difficulty is extremely high, on the other hand, the tumor has the risk of transplanting the abdominal cavity, and the postoperative infection, fistula and other complications are more.

The other is non-exposure, i.e. closing the incision and then removing the lesion. In The current non-exposure Full-thickness resection, only The Full-thickness resection device (FTRD) developed by Ovesco in Germany based on The OTSC (over The Scope clip) system is a pure endoscopic Full-thickness resection, but The device is only suitable for The lesion with The size below 2.5 cm. When superficial lesions are removed, a closing device, namely an olympus ligation ring, is made of a nylon material, can close superficial lesions, but is not suitable for closing lesions in full-thickness resection, and is easy to loosen when closing lesions with large lesions.

Disclosure of Invention

The main object of the utility model is to provide a ligator and closing device for digestive endoscopy to be applicable to the full-thickness excision, realize the reliable closure at focus position.

In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:

a ligator for a digestive endoscope is used for being matched with a closing device, wherein the closing device comprises a sheath tube, an internal core wire penetrating through two ends of the sheath tube, and an in-vitro operation assembly for changing the relative position and the relative angle of the internal core wire and the sheath tube;

the ligator includes:

the release structure is used for connecting the whole ligator to one end of the inner core wire which is used for extending into the human body in a releasable manner;

the main body line is provided with two positioning ends, and the two positioning ends are integrally connected to the mounting part, so that the main body line is folded into two to form a ring;

the sliding clamping sleeve is used for changing the closing position of the ring, the mounting part and the two positioning ends penetrate through the sliding clamping sleeve, and the outer diameter of the sliding clamping sleeve is larger than the inner diameter of the sheath pipe;

the inner wall of the sliding cutting sleeve is provided with ratchets, ratchet grooves matched with the ratchets are arranged on the main body line, so that the sliding cutting sleeve can slide along the outer wall of the ring in a single direction, and the sliding cutting sleeve slides under the pushing of the sheath tube and tightens the ring during operation.

Or the ligator comprises:

a main body wire having a first positioning end and a second positioning end, the first positioning end being integrally connected to the mounting portion,

the second positioning end is integrally connected to the sliding clamping sleeve, the mounting part and the first positioning end penetrate through the sliding clamping sleeve to enable the main body line to be bent into a ring, the sliding clamping sleeve is used for changing the closing position of the ring, and the outer diameter of the sliding clamping sleeve is larger than the inner diameter of the sheath tube;

the inner wall of the sliding cutting sleeve is provided with ratchets, ratchet grooves matched with the ratchets are arranged on the main body line, so that the sliding cutting sleeve can slide along the main body line in a single direction, and the sliding cutting sleeve tightens the ring under the pushing of the sheath tube during operation.

Optionally, when the two positioning ends both penetrate through the sliding sleeve, the ring is surrounded by a first half ring and a second half ring, the first half ring and the second half ring have two converging positions, and one of the converging positions is the closed position.

Optionally, the ratchet grooves are symmetrically distributed on the outer sides of the first half ring and the second half ring, and two ratchets are correspondingly arranged in the sliding clamping sleeve;

or the ratchet groove is arranged on the outer side of one of the first half ring and the second half ring, and the sliding clamping sleeve is internally provided with corresponding ratchets.

Optionally, a guide portion is extended from the ring to facilitate the movement of the ligator with the inner core wire in the biopsy channel, and the guide portion is located at the convergence position of the other of the first half ring and the second half ring.

Optionally, the ratchet grooves are arranged on the outer side of the ring, and the inner side of the ring is provided with anti-slip lines.

Optionally, the sliding cutting sleeve is a cylindrical sleeve.

Optionally, the number of teeth of each ratchet tooth in the sliding sleeve is one of two or three.

Optionally, the mounting portion and the main body line are made of memory metal.

Optionally, be provided with the couple on the inner core line, the couple is located the one end that is used for stretching into the human body on the inner core line, the pine takes off the structure and includes the hook groove and lets the groove, the hook groove is used for hanging the couple, let the groove retreat with the hook groove borders on and link up, let the groove be located the hook groove with between the slip cutting ferrule.

A closing device for a digestive endoscope comprises a sheath tube, an internal core wire penetrating through two ends of the sheath tube, an in-vitro operation assembly used for changing the relative position and the relative angle of the internal core wire and the sheath tube, and any one of the ligators for the digestive endoscope.

The utility model discloses following beneficial effect has at least:

the utility model discloses a digestion endoscope is with ligator and closing device through set up ratchet groove on the main part line, sets up the ratchet on the slip cutting ferrule, makes the slip cutting ferrule only can follow the direction removal of tightening ring, and the ring cover of ligator is when the base position, and the slip cutting ferrule can not reverse slip, and the ring is difficult for taking off from the focus pine, is applicable to the closure to focus base position in the full-thickness excision, is favorable to the more reliable closure of focus position, in addition, the utility model discloses a digestion endoscope is with ligator and closing device also can be arranged in the closure to the focus position in the shallow layer excision.

Drawings

Fig. 1 is a schematic view showing an exemplary construction of a ligator according to the present invention;

fig. 2 is a schematic view showing another exemplary construction of the ligator of the present invention;

fig. 3 is a schematic view of an exemplary structure of the closure device of the present invention;

FIG. 4 is a view showing the state of the closing device of the present invention when tightening the ring;

FIG. 5 is a schematic diagram of an exemplary structure of a body line;

FIG. 6 is a schematic view of another exemplary structure of a body line;

FIG. 7 is a schematic diagram of yet another exemplary construction of a body line;

FIG. 8 is a schematic diagram of yet another exemplary structure of a body line;

fig. 9 is a schematic diagram illustrating an exemplary three-dimensional cross-sectional configuration of a sliding ferrule;

fig. 10 is a schematic diagram of another exemplary three-dimensional cross-sectional mechanism of the sliding ferrule;

fig. 11 is a schematic view showing still another exemplary construction of the ligator of the present invention;

FIG. 12 is a partial schematic view of a hanger;

FIG. 13 illustrates an exemplary partial schematic view of the ratchet grooves disposed on the inner side of the body line;

FIG. 14 shows another exemplary partial schematic view of a ratchet slot disposed inboard of a body line.

Description of reference numerals in the examples:

ligator 100, sheath 200, internal core wire 300, extracorporeal operation assembly 400.

Mounting portion 110, body line 120, sliding ferrule 130, hook 310, handle 410, gripping portion 420, and a clip,

The release structure 111, the first positioning end 120a, the second positioning end 120b, the ring 121, the guide portion 122, the first half ring 121a, the second half ring 121b, the ratchet groove 121c, the anti-slip thread 121d, and the ratchet 131.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like reference numerals refer to like elements throughout.

The present invention provides a ligator for a digestive endoscope, which is used in cooperation with a closure device, referring to fig. 3 and 4, the closure device includes a sheath 200, an internal core wire 300 penetrating both ends of the sheath 200, and an extracorporeal operation unit 400 for changing the relative position and relative angle of the internal core wire 300 and the sheath 200.

In some embodiments, referring to fig. 1, 5-10 in combination, the ligator 100 comprises:

a mounting part 110, wherein a release structure 111 is arranged on the mounting part 110, and the release structure 111 is used for connecting the whole ligator 100 to the inner core wire 300 in a releasable manner and is used for extending into one end of the human body;

a main body wire 120, wherein the main body wire 120 has two positioning ends (a first positioning end 120a and a second positioning end 120b), and both of the two positioning ends are integrally connected to the mounting portion 110, so that the main body wire 120 is folded in half to form a loop 121;

the sliding cutting sleeve 130 is used for changing the closing position of the ring 121, the mounting part 110 and the two positioning ends both penetrate through the sliding cutting sleeve 130, and the outer diameter of the sliding cutting sleeve 130 is larger than the inner diameter of the sheath 200;

wherein, the inner wall of the sliding cutting ferrule 130 is provided with ratchet teeth 131, ratchet grooves 121c matched with the ratchet teeth 131 are arranged outside the main body line 120, so that the sliding cutting ferrule 130 can slide along the outer wall of the ring 121 in one direction, and during operation, the sliding cutting ferrule 130 slides under the push of the sheath 200 and tightens the ring 121.

In another embodiment, referring to fig. 2 in combination, the ligator 100 comprises:

a main body wire 120, the main body wire 120 having a first positioning end 120a and a second positioning end 120b, the first positioning end 120a being integrally coupled to the mounting portion 110,

the second positioning end 120b is integrally connected to the sliding ferrule 130, the mounting portion 110 and the first positioning end 120a penetrate through the sliding ferrule 130, so that the main body line 120 is bent into a ring 121, the sliding ferrule 130 is used for changing the closing position of the ring 121, and the outer diameter of the sliding ferrule 130 is larger than the inner diameter of the sheath 200;

wherein, the inner wall of the sliding cutting ferrule 130 is provided with ratchet teeth 131, ratchet grooves 121c matched with the ratchet teeth 131 are arranged outside the main body line 120, so that the sliding cutting ferrule can slide along the main body line 120 in one direction, and during operation, the sliding cutting ferrule 130 tightens the ring 121 under the pushing of the sheath tube 200.

The ligator 100 of the above embodiment is used in the following manner: before an operation, the ligator 100 is pre-installed on the inner core wire 300 in vitro, the external body operation assembly is operated to make the connection part of the ligator 100 and the inner core wire 300 be positioned in the sheath 200, and the sliding ferrule 130 is positioned outside the sheath 200 and keeps a certain distance with the end of the sheath 200, during the operation, the sheath 200 and the inner core wire 300 with ligation at the end are inserted into the body along with the biopsy channel to make the ligator 100 reach the focus position, then the external body operation assembly 400 is operated in vitro to make the ligator 100 be sleeved on the base of the focus position, then the sheath 200 is pushed forward in vivo relative to the inner core wire 300 by operating the external body operation assembly 400 to make the sheath 200 push the sliding ferrule 130 against the sliding ferrule 130 to tighten the ring 121 formed on the main body wire 120, because the main body wire 120 is provided with the ferrule 121c and the ratchet groove 130 is provided with the ratchet 131, the sliding ferrule 130 can only move along the direction of the tightening ring 121, when the ring 121 of the ligator 100 is sleeved on the base part, the sliding cutting sleeve 130 can not slide reversely, and the ring 121 is not easy to loosen from the focus, thus being beneficial to more reliably closing the focus part. In addition, in practice, the outer diameter of sliding ferrule 130 must be smaller than the inner diameter of the jaws when operating in the jaw track.

In practical implementation, referring to fig. 1 and 2, the extracorporeal operation assembly 400 may include a handle 410 connected to the internal core wire 300 and a grip 420 connected to the sheath, and when in use, one hand holds the handle 410, the other hand holds the grip 420, the relative angle between the internal core wire 300 and the sheath is changed by rotating the handle 410 or the grip 420, and the relative position between the internal core wire 300 and the sheath in the track direction is changed by pushing and pulling the handle 410 or the grip 420. Of course, in practical implementation, the structure of the extracorporeal operation module 400 may also adopt other existing structures as long as the relative angle between the internal core wire 300 and the sheath shell and the relative position of the stitch direction can be changed.

In addition, in practical implementation, referring to fig. 6, the ratchet groove 121c may be formed between the convex teeth after the convex teeth are formed on the surface of the main body line 120, referring to fig. 7, the ratchet groove 121c may also be a concave groove directly formed on the surface of the main body line 120, and naturally, the concave groove is more favorable for the smoother movement of the main body line 120 in the biopsy channel. In fig. 1 and 2, the ratchet grooves 121c are disposed on the outer side of the main body line 120, and in an actual implementation, referring to fig. 13 and 14, the ratchet grooves may be disposed on the inner side of the main body line 120.

In some embodiments, referring to fig. 5, 7, 8, when both positioning ends (first positioning end 120a and second positioning end 120b) extend through the sliding ferrule, the ring 121 is enclosed by a first half ring 121a and a second half ring 121b, the first half ring 121a and the second half ring 121b having two converging positions, one of which is the closed position.

In some embodiments, a guide 122 is extended from the ring 121 for moving the ligator 100 with the inner core wire 300 in the biopsy channel, and the guide 122 is located at the other converging position of the first half ring 121a and the second half ring 121 b. In the actual implementation process, the guide portion 122 is also linear, and the end of the guide portion 122 in the shape of a short line may be an arc head, so that the guide portion 122 can smoothly guide the whole ligator 100 to move in the biopsy channel, and the guide portion 122 can be prevented from injuring human tissues.

In some embodiments, referring to fig. 5 and 9, the ratchet grooves 121c are symmetrically distributed on the outer sides of the first half ring 121a and the second half ring 121b, and two ratchet teeth 131 are correspondingly arranged in the sliding sleeve; in other embodiments (not shown), the ratchet groove is disposed on the outer side of one of the first half ring and the second half ring, and the sliding sleeve is correspondingly provided with the ratchet.

In some embodiments, referring to fig. 7, 8, the inner side of the ring 121 is provided with an anti-slip thread 121 d. In practical implementation, the anti-slip pattern 121d may be a straight stripe or a corrugation extending along the track of the ring 121, the anti-slip pattern may be discontinuous or continuous, and the corrugation may be a staggered corrugation or a parallel corrugation. These anti-slip threads are beneficial to the ring 121 to be more reliably sleeved on the base of the focus and not easy to slip.

In some embodiments, referring to fig. 9 and 10, sliding ferrule 130 is a cylindrical sleeve that facilitates smooth movement of sliding ferrule 130 within the biopsy channel and also facilitates preventing damage to body tissue by sliding ferrule 130. Of course, in practical implementations, the sliding collar 130 may take other shapes, such as polygonal post or other shapes, as long as the sliding collar 130 can slide with the entire ligator 100 within the biopsy channel.

In some embodiments, referring to fig. 9, the number of teeth of the ratchet 131 is two or three at each location in the sliding ferrule 130. Since the length of the inner core wire 300 in the entire closure device usually reaches more than one meter, if the number of teeth is too large, it is very difficult to push the sliding ferrule 130 to slide along the main body wire 120, which causes difficulty in operation, and two or three ratchets 131 are provided, which is not only beneficial to smooth operation and capable of providing sufficient locking force, but also can be any number other than two or three in practical implementation process. In a specific embodiment, the ratchet may be a ratchet segment, see fig. 10, and the ratchet 131 may also be a ring ratchet.

In some embodiments, the material of the mounting portion 110 and the body line 120 are both memory metal, and the ring 121 of the ligator 100 can restore its shape under the resilience force when entering a large space hole such as the stomach after entering the biopsy channel and being pressed and deformed by the channel. In practical implementation, the memory metal can be titanium alloy, has light dead weight, and is easier to control when the position of the operating assembly control ring 121 is utilized.

In some embodiments, with reference to fig. 1, 2, and 12, a hook 310 is disposed on the inner core 300, the hook 310 is located on the inner core 300 for extending into one end of the human body, the release structure 111 includes a hook groove 111a and a yielding groove 111b, the hook groove 111a is used for hooking the hook 310, the yielding groove 111b is adjacent to and communicated with the hook groove 111a, and the yielding groove 111b is located between the hook groove 111a and the sliding sleeve 130. During operation, after the sliding ferrule 130 has completed the closing of the ring 121 to the base of the lesion, the extracorporeal operation assembly 400 is operated to drive the sheath 200 to move in the extracorporeal direction relative to the inner core wire 300, so that the connection part between the hook 310 and the mounting part 110 is exposed, and then the sheath 200 and the inner core wire 300 are synchronously fed in the intracorporeal direction, so that the hook 310 moves from the groove 111a to the receding groove 111b, and the inner core wire 300 is repeatedly rotated, so that the hook 310 can be completely detached from the mounting part 110. In practical implementation, referring to fig. 11, the releasing structure 111 may also adopt other structures, such as: the mounting portion 110 may be a looped hook 310 hole surrounded by a wire.

In some embodiments, referring to fig. 5, the body line 120 is circular in cross-section. In other embodiments, referring to fig. 7, the section of the main body line 120 is semicircular, the arc surface of the main body line 120 faces outward, and the ratchet groove 121c is disposed on the arc surface. In another embodiment, referring to fig. 8, the cross-sectional contour of the main body line 120 includes two opposite straight line segments and two circular arc segments connected between the two straight line segments, and the ratchet groove 121c is disposed on a surface corresponding to one of the straight line segments. Correspondingly, when the ratchet groove 121c is disposed on a surface corresponding to the straight line segment, a plane opposite to the straight line segment is also correspondingly disposed on the sliding ferrule 130, and the ratchet 131 is disposed on the plane.

The present invention also provides a closing device for a digestive endoscope, which comprises a sheath 200, an internal core wire 300 penetrating through both ends of the sheath 200, an in vitro operating assembly 400 for changing the relative position and the relative angle of the internal core wire 300 and the sheath 200, and the ligator 100 for a digestive endoscope as described above with reference to fig. 3 and 4.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features being in contact, not being in direct contact, but rather being in contact with each other via additional features between them.

In the description of the invention, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, components, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, and/or groups thereof.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a ligator for digestion scope, its is used for cooperating closing device to use which characterized in that: the closing device comprises a sheath tube, an internal core wire penetrating through two ends of the sheath tube, and an in-vitro operation assembly for changing the relative position and the relative angle of the internal core wire and the sheath tube;

the ligator includes:

the main body line is provided with two positioning ends, and the two positioning ends are connected to the mounting part, so that the main body line is folded in half to form a ring;

wherein, the inner wall of the sliding cutting sleeve is provided with ratchets, ratchet grooves matched with the ratchets are arranged on the main body line, so that the sliding cutting sleeve can slide along the outer wall of the ring in a single direction, and the sliding cutting sleeve slides under the pushing of the sheath tube and tightens the ring during operation;

or the ligator comprises:

the second positioning end is integrally connected to the sliding clamping sleeve, the mounting part and the first positioning end penetrate through the sliding clamping sleeve to enable the main body line to be bent into a ring, the sliding clamping sleeve is used for changing the closed position of the ring, the outer diameter of the sliding clamping sleeve is larger than the inner diameter of the sheath tube, and the outer diameter of the sliding clamping sleeve is smaller than the inner diameter of the endoscope biopsy pipeline;

2. The digestive endoscope ligator according to claim 1, wherein: when the two positioning ends penetrate through the sliding clamping sleeve, the ring is enclosed by a first half ring and a second half ring, the first half ring and the second half ring are provided with two gathering positions, and one of the gathering positions is the closed position.

3. The digestive endoscope ligator according to claim 2, wherein:

the ratchet grooves are symmetrically distributed on the first half ring and the second half ring, and two ratchets are correspondingly arranged in the sliding clamping sleeve;

or the ratchet groove is arranged on one of the first half ring and the second half ring, and the sliding cutting sleeve is internally provided with a ratchet correspondingly.

4. The digestive endoscope ligator according to claim 2, wherein: a guide part which is convenient for the ligator to move along with the inner core wire in the biopsy channel extends from the ring, and the guide part is positioned at the other converging position of the first half ring and the second half ring.

5. The digestive endoscope ligator according to claim 1, wherein: the ratchet grooves are formed in the outer side of the ring, and anti-slip grains are arranged on the inner side of the ring.

6. The digestive endoscope ligator according to claim 1, wherein: the sliding clamping sleeve is a cylindrical sleeve.

7. The digestive endoscope ligator according to claim 1, wherein: the number of teeth of each ratchet tooth in the sliding sleeve is one of two or three.

8. The digestive endoscope ligator according to claim 1, wherein: the mounting part and the main body line are made of memory metal.

9. The digestive endoscope ligator according to claim 1, wherein: the inner core line is provided with a hook, the hook is located the human one end of being used for stretching into on the inner core line, the pine takes off the structure and includes the hook groove and lets the groove, the hook groove is used for hitching the couple, let the groove retreat with the hook groove borders on and link up, let the groove be located the hook groove with between the slip cutting ferrule.

10. A closing device for a digestive endoscope, comprising: the ligator for the digestive endoscope comprises a sheath, an inner core wire penetrating through two ends of the sheath, an in vitro operation assembly for changing the relative position and the relative angle of the inner core wire and the sheath, and the ligator for the digestive endoscope as claimed in any one of claims 1 to 9.