WO2022077583A1

WO2022077583A1 - Fully degradable metal-based vascular tissue ligating clip for endoscope

Info

Publication number: WO2022077583A1
Application number: PCT/CN2020/124639
Authority: WO
Inventors: 王春华; 赵红; 李莹; 李志伟; 桑小林; 张玲; 薛辉; 蒋易良; 张佳锴; 陈政
Original assignee: 常州安康医疗器械有限公司
Priority date: 2020-10-13
Filing date: 2020-10-29
Publication date: 2022-04-21
Also published as: CN112155636A

Abstract

A fully degradable metal-based vascular tissue ligating clip for an endoscope. The ligating clip comprises an upper clip head (1), wherein positioning teeth (2) are mounted on the outside of the upper clip head (1), a lower clip head (3) is connected to the bottom end of the upper clip head (1), tooth aligning grooves (4) are formed in the lower clip head (3), and a retention mechanism (5) is mounted on an outer side of the lower clip head (3). Conventional fully degradable metal-based vascular tissue ligating clips for an endoscope are all fixed by means of metal deformation, but are prone to the phenomenon of a poor clamping effect when polyps are thick; for this reason, when the ligating clip is closed, an alignment block (501) is connected to an alignment groove (507) in a fixed block (506), and when the alignment block (501) moves to a certain position, a movable block (504) in the alignment block (501) is reset by means of a reset spring (505), so that the movable block (504) is clamped to a recess (508) in the fixed block (506), such that the top end of the ligating clip is effectively positioned, and the phenomenon of the ligating clip being loose is thus avoided.

Description

A fully degradable metal-based vascular tissue closure clip for laparoscopy

technical field

The invention belongs to the field of endoscopic surgery, in particular to a fully degradable metal-based vascular tissue closure clip for endoscopic surgery.

Background technique

Laparoscopic surgery is a newly developed minimally invasive method and an inevitable trend in the development of future surgical methods. With the rapid development of industrial manufacturing technology, the integration of related disciplines has laid a firm foundation for the development of new technologies and methods. With the increasingly skilled operation of doctors, many open surgeries in the past have now been replaced by endovascular surgeries, greatly increasing the options for surgery.

Existing laparoscopic surgery on vascular tissue requires auxiliary tools to operate, so fully degradable metal-based vascular tissue closure clips are needed for assistance, which can close the vascular tissue during use, but it will also cause inconvenience when closing. Because of its firmness and its size cannot be adjusted during use, we designed a fully degradable metal-based vascular tissue closure clip for laparoscopy.

SUMMARY OF THE INVENTION

In order to solve the problem of the existing endoscopic surgery on vascular tissue, auxiliary tools are required for operation, so a fully degradable metal-based vascular tissue closure clip is required for assistance, which can close the vascular tissue during use, but it will also produce The phenomenon that the closure is not firm and the size cannot be adjusted during use. The invention provides a fully degradable metal-based vascular tissue closure clip for endoscopic use, which has the characteristics of firm closure, rapid positioning and adjustable size.

In order to achieve the above purpose, the present invention provides the following technical solutions: a fully degradable metal-based vascular tissue closure clip for endoscopy, comprising an upper clip, the outer part of the upper clip is provided with positioning teeth, and the bottom end of the upper clip is installed. A lower collet is connected, the inside of the lower collet is provided with a pair of tooth slots, and the outer side of the lower collet is installed with a retention mechanism, the interior of the upper chuck is connected with an extension mechanism, and the interior of the retention mechanism includes There is an alignment block, and the interior of the alignment block is provided with a chute, the interior of the chute is connected with a slider, and a movable block is installed outside the slider, and a return spring is connected between the slider and the chute The bottom end of the alignment block is provided with a fixing block, and the interior of the fixing block is provided with an alignment groove, and the outer side of the alignment groove is provided with a groove.

Preferably, the movable block forms a sliding structure through the slider, the chute and the alignment block, and the movable block is symmetrical with respect to the central axis of the alignment block.

Preferably, an elastic structure is formed between the sliding block and the sliding groove through the return spring, and the transverse axis of the sliding block coincides with the transverse axis of the sliding groove.

Preferably, the alignment block forms a movable structure through an alignment slot and a fixed block, and the alignment block forms a fixed structure through the movable block and the fixed block.

Preferably, the extension mechanism includes a post, the outer side of the post is threadedly connected with a positioning nut, the bottom end of the post is mounted with a connecting block, and the outer side of the connecting block is connected with a guide block, and the guide block is The outside is provided with a guide groove, and the outside of the guide groove is provided with a built-in groove.

Preferably, the connecting block forms a movable structure through the guide block, the guide groove and the upper chuck, and the guide block is relatively symmetrical with respect to the central axis of the connecting block.

Preferably, the post forms a fixed structure with the upper collet through the positioning nut, and the central axis of the post coincides with the central axis of the upper collet.

Preferably, the cross-sectional area of the connecting rod is smaller than the cross-sectional area of the upper collet, and the central axis of the connecting rod coincides with the central axis of the connecting block.

Compared with the prior art, the beneficial effects of the present invention are:

1. In the present invention, the fully degradable metal-based vascular tissue closure clip for endoscope is made of titanium alloy as a whole. Titanium alloy works in humid atmosphere and seawater medium, and its corrosion resistance is much better than stainless steel; It has strong resistance to acid corrosion and stress corrosion; it has excellent corrosion resistance to alkali, chloride, chlorine, organic substances, nitric acid, sulfuric acid, etc., so it can effectively avoid the reaction with the human body during tissue closure. damage to the human body and ensure the health and safety of the human body.

2. In the present invention, under the action of the retention mechanism, the previous fully degradable metal-based vascular tissue closure clips for endoscopic use are all fixed by metal deformation, but in the case of thick polyps, it is easy to lead to poor clamping effect. When the closed clip is clamped, the alignment block is connected to the alignment slot inside the fixed block. When the alignment block moves to a certain position, the movable block inside the alignment block is made to pass the return spring. After reset, the movable block is engaged with the inner groove of the fixed block, so that the top end of the closing clip is effectively positioned, thereby preventing the closing clip from loosening.

3. In the present invention, under the action of the extension mechanism, when the length of the closing clip is found to be insufficient during use, the upper clip can be pulled, so that the connecting rod connected inside the upper clip can be moved through the guide block. In this way, the front end of the upper collet can be effectively extended, and the closed clip can be effectively extended for a certain distance. When the movement is completed, the positioning nut can be tightened, so that the extended position is fixed and the extended Use effect, and the lower chuck can be done in the same way.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

2 is a schematic structural diagram of a retaining mechanism of the present invention;

FIG. 3 is a schematic structural diagram of the extension mechanism of the present invention.

In the figure: 1. Upper chuck; 2. Positioning teeth; 3. Lower chuck; 4. Alignment slot; 5. Retention mechanism; 501, Alignment block; 502, Chute; 503, Slider; 504, Active block; 505, return spring; 506, fixed block; 507, alignment groove; 508, groove; 6, extension mechanism; 601, post; 602, positioning nut; 603, connecting block; 604, guide block; 605 , Guide groove; 606, built-in groove.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-3, the present invention provides the following technical solutions: a fully degradable metal-based vascular tissue closure clip for endoscopy, comprising an upper clip 1, a positioning tooth 2, a lower clip 3, a pair of tooth slots 4, a retention Mechanism 5, alignment block 501, chute 502, slider 503, movable block 504, return spring 505, fixed block 506, alignment groove 507, groove 508, extension mechanism 6, post 601, positioning nut 602, connection Block 603, guide block 604, guide groove 605 and built-in groove 606, the positioning teeth 2 are installed on the outside of the upper collet 1, and the bottom end of the upper collet 1 is connected with the lower collet 3, and the inside of the lower collet 3 is provided with For the tooth slot 4, a retaining mechanism 5 is installed on the outer side of the lower collet 3, an extension mechanism 6 is connected inside the upper collet 1, the retaining mechanism 5 includes an alignment block 501, and the interior of the alignment block 501 A chute 502 is opened, a slider 503 is connected inside the chute 502, a movable block 504 is installed outside the slider 503, a return spring 505 is connected between the slider 503 and the chute 502, and the bottom of the alignment block 501 is The end is provided with a fixing block 506 , an alignment groove 507 is formed inside the fixing block 506 , and a groove 508 is formed on the outer side of the alignment groove 507 .

By adopting the above technical solution, the fully degradable metal-based vascular tissue closure clip for endoscope is made of titanium alloy as a whole, and the titanium alloy works in the humid atmosphere and seawater medium, and its corrosion resistance is much better than that of stainless steel; The resistance to corrosion, acid etching and stress corrosion is particularly strong; it has excellent corrosion resistance to alkali, chloride, chlorine, organic substances, nitric acid, sulfuric acid, etc., so it can effectively avoid the reaction with the human body during tissue closure. Cause damage to human body and ensure human health and safety.

Specifically, the movable block 504 forms a sliding structure with the alignment block 501 through the slider 503 , the chute 502 , and the movable block 504 is symmetrical with respect to the central axis of the alignment block 501 .

By adopting the above technical solution, the sliding groove 502 is provided inside the alignment block 501, so that the movable block 504 can be effectively transposed through the slider 503, and the movable block 504 adopts a semi-arc shape, so that the movable block 504 can effectively shrink.

Specifically, the slider 503 forms an elastic structure between the return spring 505 and the chute 502 , and the transverse axis of the slider 503 coincides with the transverse axis of the chute 502 .

By adopting the above technical solution, the movable block 504 inside the alignment block 501 is reset by the reset spring 505, so that the movable block 504 is engaged with the inner groove 508 of the fixed block 506, so that the top of the closed clip is effectively positioned, Thereby, the phenomenon that the closing clip is loosened is prevented.

Specifically, the alignment block 501 forms a movable structure through the alignment slot 507 and the fixed block 506 , and the alignment block 501 forms a fixed structure through the movable block 504 and the fixed block 506 .

By adopting the above technical solution, the two groups of movable blocks 504 are engaged with the grooves 508, so that the connected position is more firmly prevented from loosening.

Specifically, the extension mechanism 6 includes a post 601, and the outer side of the post 601 is threadedly connected with a positioning nut 602, the bottom end of the post 601 is installed with a connecting block 603, and the outer side of the connecting block 603 is connected with a guide block 604, which guides the The outside of the block 604 is provided with a guide groove 605 , and the outside of the guide groove 605 is provided with a built-in groove 606 .

By adopting the above technical solution, when the closing clip is found to be insufficient in length, the upper chuck 1 can be pulled, so that the connecting rod 601 connected inside the upper chuck 1 is moved through the guide block 604 .

Specifically, the connection block 603 forms a movable structure with the upper chuck 1 through the guide block 604 , the guide groove 605 , and the guide block 604 is symmetrical about the central axis of the connection block 603 .

By adopting the above technical solution, the upper collet 1 is provided with a guide groove 605 and a built-in groove 606, so that the connecting rod 601 connected inside the upper collet 1 can be effectively moved and adjusted.

Specifically, the post 601 forms a fixed structure with the upper collet 1 through the positioning nut 602 , and the central axis of the post 601 coincides with the central axis of the upper collet 1 .

By adopting the above technical solution, after the movement is completed, the positioning nut 602 can be tightened, so that the extended position is fixed and the extended use effect is ensured.

Specifically, the cross-sectional area of the connecting rod 601 is smaller than the cross-sectional area of the upper collet 1 , and the central axis of the connecting rod 601 coincides with the central axis of the connecting block 603 .

By adopting the above technical solution, the lower clamp 3 can be extended in the same way as the two upper clamps 1, so that the position can be aligned after the extension, thereby ensuring that the closure clamp can effectively close the vascular tissue.

The working principle and use process of the present invention: the fully degradable metal-based vascular tissue closure clip for endoscope is made of titanium alloy as a whole, and the titanium alloy works in humid atmosphere and seawater medium, and its corrosion resistance is much better than that of stainless steel; The resistance to pitting corrosion, acid corrosion and stress corrosion is particularly strong; it has excellent corrosion resistance to alkali, chloride, chlorine, organic substances, nitric acid, sulfuric acid, etc., so it can effectively avoid the occurrence of human body during tissue closure. The reaction will cause damage to the human body and ensure the health and safety of the human body. In the past, the fully degradable metal-based vascular tissue closure clips for laparoscopy were fixed by metal deformation, but in the case of thick polyps, it is easy to lead to poor clamping effect. When the closed clip is clamped, the alignment block 501 is connected to the alignment groove 507 inside the fixed block 506. When the alignment block 501 moves to a certain position, the alignment block 501 is moved inside. The block 504 is reset by the return spring 505, so that the movable block 504 is engaged with the internal groove 508 of the fixed block 506, so that the top of the closing clip is effectively positioned, thereby preventing the closing clip from loosening. When the length of the clamp is found to be insufficient, the upper clamp 1 can be pulled, so that the connecting rod 601 connected inside the upper clamp 1 is moved through the guide block 604, so that the front end of the upper clamp 1 can be effectively extended. , the closing clip can be effectively extended for a certain distance, and after the movement is completed, the positioning nut 602 can be tightened, so that the extended position is fixed and the extended use effect is guaranteed, and the lower clip 3 can be used Do it the same way.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A fully degradable metal-based vascular tissue closure clip for endoscopic use, comprising an upper clip (1), characterized in that: a positioning tooth (2) is installed on the outside of the upper clip (1), and the upper clip (1) is ) is connected with a lower collet (3) at the bottom end, the inner part of the lower collet (3) is provided with a pair of tooth slots (4), and a retaining mechanism (5) is installed on the outer side of the lower collet (3), An extension mechanism (6) is connected inside the upper collet (1), an alignment block (501) is included inside the retention mechanism (5), and a chute (501) is provided inside the alignment block (501). 502), a slider (503) is connected inside the chute (502), and a movable block (504) is installed outside the slider (503), and the slider (503) is connected to the chute (502). A return spring (505) is connected between the two, the bottom end of the alignment block (501) is provided with a fixing block (506), and the interior of the fixing block (506) is provided with an alignment groove (507), the alignment groove The outer side of (507) is provided with a groove (508).
The fully degradable metal-based vascular tissue closure clip for endoscopic use according to claim 1, wherein the movable block (504) passes through a slider (503), a chute (502) and an alignment block (501) ) constitute a sliding structure, and the movable block (504) is relatively symmetrical with respect to the central axis of the alignment block (501).
The fully degradable metal-based vascular tissue closure clip for endoscopic use according to claim 1, characterized in that: the slider (503) forms an elastic structure between the return spring (505) and the chute (502), And the transverse axis of the slider (503) coincides with the transverse axis of the chute (502).
The fully degradable metal-based vascular tissue closure clip for endoscopy according to claim 1, wherein the alignment block (501) forms a movable structure through the alignment groove (507) and the fixing block (506), And the alignment block (501) forms a fixed structure through the movable block (504) and the fixed block (506).
The fully degradable metal-based vascular tissue closure clip for endoscopic use according to claim 1, characterized in that: the extension mechanism (6) includes a post (601) inside, and the external thread of the post (601) A positioning nut (602) is connected, a connecting block (603) is installed at the bottom end of the connecting rod (601), and a guide block (604) is connected to the outer side of the connecting block (603), and the outside of the guide block (604) is connected A guide groove (605) is provided, and a built-in groove (606) is opened on the outer side of the guide groove (605).
The fully degradable metal-based vascular tissue closure clip for endoscopic use according to claim 5, wherein the connecting block (603) passes through the guide block (604), the guide groove (605) and the upper clamp (1). ) constitutes a movable structure, and the guide block (604) is relatively symmetrical with respect to the central axis of the connecting block (603).
The fully degradable metal-based vascular tissue closure clip for endoscopic use according to claim 5, characterized in that: the post (601) forms a fixed structure through the positioning nut (602) and the upper clip (1), and The central axis of the connecting rod (601) coincides with the central axis of the upper chuck (1).
The fully degradable metal-based vascular tissue closure clip for endoscopic use according to claim 5, characterized in that: the cross-sectional area of the post (601) is smaller than the cross-sectional area of the upper clip (1), and the cross-sectional area of the connecting rod (601) is The central axis of the rod (601) coincides with the central axis of the connecting block (603).