CN106236178B

CN106236178B - A ferrule ligation device

Info

Publication number: CN106236178B
Application number: CN201610756151.9A
Authority: CN
Inventors: 唐志; 徐慧文; 范茗侨; 丁小良; 沙德青
Original assignee: Micro Tech Nanjing Co Ltd
Current assignee: Micro Tech Nanjing Co Ltd
Priority date: 2016-08-29
Filing date: 2016-08-29
Publication date: 2019-01-25
Anticipated expiration: 2036-08-29
Also published as: CN106236178A

Abstract

The invention discloses a ferrule ligation device, comprising a first pull cable, a first pull ring, a second pull cable, a second pull ring, a ferrule, a ferrule locking device, a first inner tube, a second inner tube and The spring tube is characterized in that the ferrule locking device comprises a damping body, an upper ferrule locking slider and a lower ferrule locking slider, one end of the ferrule is a fixed end and is fixed on the lower ferrule locking slider, The first pull cable is connected to the wire loop fixed on the lower slider of the ferrule lock through the first pull ring, the other end of the ferrule is a free end, and the free end passes through the middle hole of the upper ferrule lock slider. The second pull ring is connected with the second pull cable, the upper slider of the ferrule lock has a slider guide groove, and the end of the slider guide groove is a block structure with a protruding plane height to limit the ferrule lock lower slider in the sleeve The sliding block of the ring-locking slider moves in the guide groove of the slider, and does not exceed the end faces of both ends of the ring-locking slider.

Description

A kind of lasso apparatus for ligating

Technical field

Repeatable adjustment collar size when extracting tissue the present invention relates to a kind of medical instrument, especially one kind, when set is pricked The effectively apparatus for ligating of ligation fixing organization.

Background technique

Pipe intestinal polyp is the most common benign tumour, and canceration can occur for part of polyp especially adenomatous polyp, Endoscopic removal treatment is generally carried out to such lesion.Under scope the common complication of polypectomy include bleeding, perforation and Infection etc..Wherein bleeding is most common and most serious one of complication, incidence 0.3%-6.1%.The thick base of a fruit or wide base The risk that bleeding occurs under polyp scope after High frequency electrotomy is higher.Polyp is ligatured in advance using nylon ferrule and blocks root Blood flow, then the excision of row high cut art can prevent bleeding.Wherein nylon ferrule ligation joint metal folder can be avoided largely Postoperative hemorrhage and Hemorrhage have obtained clinic and have widely used and promote.

The nylon ferrule product structure clinically used at present are as follows: it is relatively small that a closed nylon ring is inserted in internal diameter Elastomer a distance, and two circles are divided into, wherein being the effect of lasso polyp, another circle and conveyer phase compared with great circle Even.This nylon ferrule it is relatively simple for structure, but lasso ligation process be by pull lasso, elastomer is in bourdon tube Remained stationary under position-limiting action, so that lasso be made to become smaller, doctor need when in use by from external control lasso in elastomer Interior movement, if the power between lasso and elastomer is larger, doctor's operation is relatively difficult, if the power is smaller, quilt cover is organized to prick Lasso size is not allowed to be fixed easily afterwards, eventually causes slippage, causes Hemorrhage.The big minor adjustment mistake of above-mentioned nylon ferrule simultaneously Journey is unidirectional, once being deviated during covering and pricking to extracting for tissue, then can not readjust lasso size to be applicable in In tissue size.

Summary of the invention

The present invention is cut off for pipe intestinal polyp and electroporation therapy, in order to prevent bleeding and treatment perforation, designs one kind Repeatable adjustment collar size, effectively ligatures the apparatus for ligating of fixing organization when extracting tissue when set is pricked, using it is simple, laborsaving, Reliably.

In order to solve the above technical problems, the present invention provides a kind of lasso apparatus for ligating, including the first drag-line, the second drag-line, Lasso, lasso locking device and outer tube；

Described lasso one end is fixed on lasso locking device, and the other end of lasso is free end, and free end passes through set Enclose locking device and with the separable connection of the second drag-line；

In outer tube, the lasso locking device is arranged in outer tube front end for first drag-line and the setting of the second drag-line, First drag-line and the separable connection of lasso locking device；

When lasso locking device is in release conditions, second drag-line adjusts lasso by withdrawing the free end of lasso Size makes it extract object；

First drag-line and the second drag-line control lasso lock sliding block and lasso free end respectively, pull the second drag-line can Lasso size variation is controlled, to be applicable in the tissue size to be extracted.After completion is extracted, the second drag-line is withdrawn, tightens lasso；

First drag-line of pulling back makes lasso locking device become lock state, and the free end of lasso is locked at this time；

The first drag-line and the second drag-line are further withdrawn, so that lasso locking device separates.

Lasso locking device of the present invention includes damping body, lasso locks sliding block and lasso locks sliding block；

The lasso locks sliding block with slider guide slot, and slider guide slot end is the block knot of prominent level Structure is moved in the slider guide slot that lasso locks sliding block with limiting lasso lock sliding block, and locks sliding block two without departing from lasso The end face at end, to guarantee the reliable relative motion of the two.

The lasso lock sliding block has the sliding block buckle structure matched with slider guide slot, the sliding block buckle structure After insertion lasso locks the slider guide slot of sliding block, lasso locks sliding block and lasso lock sliding block is only capable of axially moving.

Lasso, which locks sliding block, has the groove for accommodating damping body, and when original state, the damping body is embedded under lasso lock In slip recess, when withdrawing the first drag-line, lasso lock sliding block is proximally slided, and damping body is squeezed and locks and glide from lasso It is skidded off in the groove of block, and is embedded into lasso and locks between sliding block and lasso lock sliding block, so that collar lock, lasso is locked at this time Sliding block will squeezed air-damping body, so that biggish normal pressure is formed to drag-line free end, to increase free end in hole Frictional force prevents lasso from unclamping under the tension of tissue, achievees the effect that lasso size locks.

The groove of lasso lock sliding block of the present invention has constant slope, when lasso lock sliding block withdraws locking, just Groove is left in damping body.

The present invention includes the first pull ring, the second pull ring and connecting line；First drag-line passes through the first pull ring and is fixed on Lasso locks the connecting line on sliding block and is connected；The free end of the lasso passes through the second pull ring across the mesoporous that lasso locks sliding block It is connected with the second drag-line.When lasso locking successively pulls at the first drag-line and the second drag-line, then pull ring can become after tissue set is pricked Shape, drag-line will lock sliding block with the lasso of distal end and snare free end is separated from and.

The present invention includes the first inner tube and the second inner tube, and first drag-line passes through the first inner tube, and second drag-line is worn The second inner tube is crossed, first inner tube, the second inner tube are fixed in outer tube to increase the stability in operating process.

Outer tube of the present invention is bourdon tube.

Lasso of the present invention is nylon ferrule.

First pull ring and the second pull ring of the present invention are made of elastomeric metal material, when be applied to the first pull ring and When power on second pull ring is more than threshold value (generally setting 5N~50N), the first pull ring and the second pull ring can take off automatically with connection position From.

The invention has the benefit that the present invention repeats adjustment collar size when extracting tissue, and while covering bundle, can Effectively ligation fixing organization, using simple, laborsaving, reliable.

Detailed description of the invention

The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, of the invention is above-mentioned And/or otherwise advantage will become apparent.

Fig. 1 is schematic structural view of the invention.

Fig. 2 is schematic diagram when withdrawing the second drag-line 3.

Fig. 3 is schematic diagram when withdrawing the first drag-line 1.

Fig. 4 is release conditions schematic diagram.

Fig. 5 is lasso lock sliding block structural schematic diagram.

Specific embodiment

As shown in Figure 1, the invention discloses a kind of lasso apparatus for ligating, including the first drag-line 1, the first pull ring 2, second are drawn Rope 3, the second pull ring 4, lasso 5, lasso locking device 6, the first inner tube 7, the second inner tube 8 and bourdon tube 9, which is characterized in that institute It states lasso locking device 6 and locks sliding block 11 and lasso lock sliding block 12 including damping body 10, lasso, described 5 one end of lasso is solid Fixed end is fixed on lasso lock sliding block 12, and first drag-line 1 is locked on sliding block 8 by the first pull ring 2 with lasso is fixed on Wire loop 13 be connected,

5 other end of lasso is free end, free end pass through lasso lock the mesoporous of sliding block 11 by the second pull ring 4 with Second drag-line 3 is connected,

The damping body 10 is embedded in lasso and locks among sliding block 11 and lasso lock sliding block 12,

First drag-line 1 pass through the first inner tube 7, second drag-line 3 pass through the second inner tube 8, first inner tube 7, Second inner tube 8 is fixed in bourdon tube 9.Lasso of the present invention locks sliding block 11 with slider guide slot 14, in the present embodiment For dovetail groove, 14 end of slider guide slot is the stop block structure 15 of prominent level, is being covered with limiting lasso lock sliding block 12 Circle locks movement in the slider guide slot 14 of sliding block 11, and the end face at 11 both ends of sliding block is locked without departing from lasso, to guarantee two The reliable relative motion of person.As shown in figure 3, lasso lock sliding block 12 has the groove 17 for accommodating damping body 10, when original state, The damping body 10 is embedded in lasso lock 12 groove 17 of sliding block, and when withdrawing the first drag-line 1, lasso locks sliding block 12 proximally Sliding, damping body 10 is squeezed and skids off from the groove 17 of lasso lock sliding block 12, and is embedded into lasso and locks sliding block 11 Between lasso lock sliding block 12, so that collar lock.Lasso lock 12 groove 17 of sliding block has constant slope 18, is covering When circle lock sliding block withdraws locking, groove is left convenient for damping body.

As shown in figure 5, lasso lock sliding block 12 of the present invention has the sliding block buckle matched with slider guide slot 14 Structure 16, after the sliding block buckle structure 16 is embedded in the slider guide slot 14 that lasso locks sliding block, lasso locks sliding block 11 and set Circle lock sliding block 12 is only capable of axially moving.

Lasso 5 of the present invention is nylon ferrule.

First pull ring 2 of the present invention and the second pull ring 4 are made of elastomeric metal material.

When in use, lasso is pushed into lesion locations under the Lookout assist effect of endoscope first, as shown in Figure 1, For original state of the present invention, then controls the second drag-line 3 adjustment lasso size and make it suitable for extracting tissue, complete tissue and extract Afterwards, the second drag-line 3 is withdrawn, lasso is tightened, as shown in Fig. 2, to achieve the purpose that tissue set is pricked, the first drag-line 1 of pulling back at this time, Slide lasso lock sliding block proximally until collar lock, as shown in Figure 3.

The first drag-line 1 is pulled on, the first pull ring 2 is detached from；Then it pulls back the second drag-line 3, makes the second pull ring 4 and lasso Free end is detached from, as shown in figure 4, when the power being applied on the first pull ring and the second pull ring is more than threshold value 15N, the first pull ring with Second pull ring can be automatically disengaged with connection position, finally withdraw from the operating devices such as drag-line.

Although the present invention is illustrated and has been described with regard to preferred embodiment, it is understood by those skilled in the art that Without departing from scope defined by the claims of the present invention, variations and modifications can be carried out to the present invention.

Claims

1. A ferrule ligation device, characterized in that it comprises a first cable (1), a second cable (3), a ferrule (5), a ferrule locking device (6) and an outer tube (9);

One end of the ferrule (5) is fixed on the ferrule locking device (6), the other end of the ferrule (5) is a free end, and the free end passes through the ferrule locking device (6) and is connected with the second pulley. cable (3) detachable connection;

The first cable (1) and the second cable (3) are arranged inside the outer tube (9), the ferrule locking device (6) is arranged at the front end of the outer tube (9), and the first cable (1) is connected to the outer tube (9). The ferrule locking device (6) is detachably connected;

When the ferrule locking device (6) is in the released state, the second pull cable (3) adjusts the size of the ferrule (5) by withdrawing the free end of the ferrule (5) so that it can catch the target;

After finishing the retrieving, retract the second cable (3) and tighten the ferrule (5);

Pull back the first cable (1) to make the ferrule locking device (6) into a locked state, at which time the free end of the ferrule (5) is locked;

Further retract the first cable (1) and the second cable (3), so that the ferrule locking device (6) is disengaged;

The ferrule locking device (6) comprises a damping body (10), an upper ferrule locking slider (11) and a lower ferrule locking slider (12);

The upper ferrule locking slider (11) is provided with a sliding block guide groove (14), and the end of the sliding block guide groove (14) is a block structure (15) protruding from the plane height, so as to limit the ferrule locking lower sliding block (14). 12) Move in the slider guide groove (14) of the ferrule locking slider (11) without exceeding the end faces of both ends of the ferrule locking slider (11);

The lower slider (12) of the ferrule lock has a slider buckle structure (16) matched with the guide groove (14) of the slider, and the slider buckle structure (16) is embedded in the upper slider (16) of the ferrule lock. After the slider guide groove (14) of 11), the upper ferrule locking slider (11) and the lower ferrule locking slider (12) can only move axially,

The lower slider (12) of the ferrule lock has a groove (17) for accommodating the damping body (10), and in the initial state, the damping body (10) is embedded in the groove (17) of the lower slider (12) of the ferrule lock In the middle, when the first cable (1) is withdrawn, the lower slider (12) of the ferrule lock slides toward the proximal end, and the damping body (10) is squeezed to lock the groove (12) of the lower slider (12) from the ferrule. 17), and insert it between the upper ferrule lock slider (11) and the lower ferrule lock slider (12), so that the ferrule is locked tightly;

The outer tube (9) is a spring tube.

2 . The ferrule ligating device according to claim 1 , wherein the groove ( 17 ) of the lower slide block ( 12 ) of the ferrule lock has a certain slope ( 18 ). 3 .

3. A ferrule ligation device according to claim 2, characterized in that it comprises a first pull ring (2), a second pull ring (4) and a connecting wire (13);

The first pulling cable (1) is connected with the connecting wire (13) fixed on the lower slider (12) of the ferrule lock through the first pulling ring (2);

The free end of the ferrule (5) passes through the middle hole of the ferrule locking slider (11) and is connected with the second pull cable (3) through the second pull ring (4).

4. A ferrule ligation device according to claim 3, characterized in that it comprises a first inner tube (7) and a second inner tube (8), and the first cable (1) passes through the first inner tube (7) and the second inner tube (8). The inner tube (7), the second cable (3) passes through the second inner tube (8), and the first inner tube (7) and the second inner tube (8) are fixed in the outer tube (9) .

5. A ferrule ligation device according to claim 1, wherein the ferrule (5) is a nylon ferrule.

6. A ferrule ligation device according to claim 4, characterized in that the first pull ring (2) and the second pull ring (4) are made of high elastic metal material, and when applied to the first pull ring (2) and the second pull ring (4) When the force on the first pull ring (2) and the second pull ring (4) exceeds the threshold value, the first pull ring (2) and the second pull ring (4) can be automatically disengaged from the connection position.