WO2017028037A1

WO2017028037A1 - Soft tissue clamp

Info

Publication number: WO2017028037A1
Application number: PCT/CN2015/087052
Authority: WO
Inventors: 张婵娟
Original assignee: 杭州安杰思医学科技有限公司
Priority date: 2015-08-14
Filing date: 2015-08-14
Publication date: 2017-02-23
Also published as: CN107072668A; CN107072668B

Abstract

A soft tissue clamp. The soft tissue clamp comprises a clip (40), a conveying component (30), and an operation component (10). The clip comprises a pair of clip pieces (401, 402) and a stop member (404) for accommodating the clip pieces. The pair of clip pieces forms a clip piece connection portion by connecting bottom ends of the pair of clip pieces. After the pair of clip pieces is fully accommodated in the stop member, side edges of the pair of clip pieces rub against and are in contact with a cavity wall of the stop member, so that head portions of the clip pieces are fully closed, and the pair of clip pieces and the stop member are locked by means of an engagement mechanism. In use of the soft tissue clamp, the clip can be well released and can tightly grasp and hold a tissue, and the clip pieces can be well closed so that the tissue can fully grow and heal.

Description

Soft tissue clip

Technical field

The invention belongs to the field of medical instruments, in particular to a soft tissue clip for use with an endoscope.

Background technique

Gastrointestinal bleeding is a common and serious condition, and if left untreated, the consequences are often fatal. This problem has prompted the development of a variety of endoscopic treatments to achieve hemostasis, such as injection hardeners and contact thermocoagulation techniques. Although these methods are effective, many patients continue to bleed, so a highly effective and invasive device is needed.

Many companies are currently developing hemostatic clip devices. For example, CN201410222753.7 discloses a hemostatic clip comprising a clamping assembly and a clamping seat, the clamping assembly comprising a clip body and a wire buckle connected in sequence; the front end of the clamping seat is provided with a fixing pin The shaft body is composed of two clamping arms, the tail ends of the two clamping arms are connected by a movable pin shaft, and the two clamping arms are respectively provided with a sliding groove in the middle thereof, the fixing pin shaft passes through the sliding groove, and two The clamping arm reciprocates along the sliding slot to form an opening and closing of the clip body; the end of the sliding slot is provided with a bending structure, and when the clamping arm moves so that the fixing pin is located in the bending structure, the two clamping arms are in the locked closed position . However, in the hemostatic clip, the distal ends of the two gripping arms are serrated, which does not allow the clip to grip the tissue securely.

There are also many hemostatic clip devices on the market. One common problem with these conventional hemostasis devices is that many devices are not strong enough to produce permanent hemostasis. Moreover, when attempting to close a perforation in a stomach or gastrointestinal structure with a clip, conventional clips suffer from problems of difficulty in placement and limited amount of grasping tissue, which may result in incomplete closure.

There is therefore a need for a clip that can be well released and that can grip the tissue securely.

Summary of the invention

It is an object of the present invention to provide a soft tissue clip that can be well released and that can grip the tissue securely and that the clip can be well closed.

A soft tissue clip of the present invention includes a clip, a conveying member and an operating member,

The clip includes a pair of clips and a stop member for receiving the clips therein, the pair of clips passing The respective bottom ends are joined to form a clip connection portion, and when the pair of clips completely receive the stop member, the side edges of the pair of clips are in frictional contact with the cavity wall of the stop member so that The head end of the clip is fully closed, and the pair of clips and the stop member are locked by the engaging mechanism;

The conveying member comprises a spring hose, a pulling wire and a releasing member, the pulling wire is inserted through the inner cavity of the spring hose; the releasing member comprises two pulling arms, and the front ends of the two pulling arms are respectively provided a hook portion, the two pull arms are connected to the clip connecting portion through hook portions of the respective front ends, the rear ends of the two pull arms are respectively fixedly connected with the front end of the pull wire; the clip passes The release member and the traction wire can receive and extend the front end of the spring hose, and when the clip is released, the hook portion of the pull arm is deformed by the pulling wire to be disengaged from the clip connecting portion;

The operating member is coupled to a spring hose of the conveying member and a rear end of the pull wire, and the clip is operated by driving the conveying member.

Preferably, the engaging mechanism includes a card slot structure provided on each of the clips and a concave protrusion provided on the stop member, when the pair of clips completely receive the stop position After the piece, the card slot structure of the clip firmly locks the protrusion of the stop member.

Preferably, the engaging mechanism includes a barb structure provided on the pair of clips and a stepped hole provided in the stop member, and when the pair of clips completely collect the stop member, The barb structure of the clip is firmly stuck into the stepped hole of the stop member.

Preferably, the bottom ends of the pair of clips are respectively provided with connection holes, and the pin tube penetrates the connection holes of the pair of clips to form the clip connection portion, and the hook portion of the pull arm is connected to the Speak on the pin tube.

Preferably, the stop member has an inner cavity and a wing portion for receiving the clip, and when the stop member is located in the spring hose, the wing portion is contracted in the inner cavity of the stop member, The wing is flared and snaps over the end face of the front end of the spring hose when the stop extends beyond the front end of the spring hose.

Preferably, a middle portion of the pull arm is provided with a step, and when the stop member is in the spring hose, a wing portion of the stop member is caught at the step to prevent the pull arm from being The inner cavity of the stop moves rearward.

Preferably, the operating member includes a main body, an operating rod penetrating the main body, an operating block sleeved on the main body and fixedly connected to the operating rod, and an operating handle fixed to the rear end of the main body, The operating block is slidably sleeved on the main body, and the rear end of the spring hose is fixedly connected to The front end of the main body of the operating member is connected to the front end of the operating rod.

Compared with the prior art, with the soft tissue clip of the present invention, the head end of the clip is fully closed by the frictional contact between the side edges of the pair of clips and the cavity wall of the stop member, and the pair of clips and the stop member are mutually The locking engagement mechanism allows the clip to be released well during use and can grip the tissue securely, and the clip can be closed well enough for the tissue to grow sufficiently heal.

DRAWINGS

Figure 1 is a schematic view showing the overall structure of a soft tissue clip of the present invention;

2 is a schematic structural view of a clip according to a first embodiment of the present invention;

Figure 3 is a schematic view showing the clip housed in a spring hose in the first embodiment of the present invention;

Figure 4 is a schematic view of the first embodiment of the present invention after the clip is pushed out of the end surface of the spring hose;

Figure 5 is a schematic view of the clip in the first embodiment of the present invention after the clip is clamped;

Figure 6 is a schematic cross-sectional view of the clip of the first embodiment of the present invention (in a direction perpendicular to the wing of the stop member);

Fig. 7 is a schematic view showing a connection relationship between a clip and a conveying member according to the first embodiment of the present invention;

Figure 8 is a schematic view of a pull arm of a first embodiment of the present invention;

Figure 9 is a schematic view of the first embodiment of the present invention after the deformation of the pull arm is released;

Figure 10 is a schematic view showing the axial cross section (in a direction perpendicular to the wing of the stop member) after the clip is released according to the first embodiment of the present invention;

Figure 11 is a schematic view of the clip taken along line A-A of Figure 10;

Figure 12 is a schematic view of a clip of a clip according to a second embodiment of the present invention;

Figure 13 is a schematic view showing the axial cross section (in a direction perpendicular to the wing of the stopper) after the clip is released in the second embodiment of the present invention.

detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific preferred embodiment of a soft tissue clip of the present invention will be described in detail with reference to the accompanying drawings, but the invention is not limited to the specific embodiments.

Embodiment 1

As shown in FIGS. 1-5, the soft tissue clip includes a clip 40, a transport member 30, and an operating member 10.

The clip includes a pair of clips 401/402 and a stop member 404 that receives the clip therein, the pair of clips 401/402 and the stop member being locked by the snap mechanism. The clips 401 / 402 are joined by respective bottom ends to form a clip connection portion. When the clips 401 / 402 are completely received by the stop member 404 , the side edges of the clips 401 / 402 are in frictional contact with the cavity wall of the stop member 404 . A positive pressure is applied to the head end of the clip 401/402 such that the head end of the clip 401/402 is sufficiently closed and the clip 401/402 and the stop 404 are locked by the snap mechanism.

As shown in Figures 6-9, the delivery member includes a spring hose (not shown), a pull wire 302 and a release member 20 through which the pull wire 302 extends;

The release member 20 includes two

pull arms

204 and 205, and the front ends of the pull arms 204/205 are respectively provided with hook portions, and the pull arms 204/205 are connected to the clip connection portions through the hook portions of the respective front ends, and the pull arms 204/205 The rear end is fixedly connected to the front end of the pull wire 302, respectively, and the clip 40 can receive and extend the front end of the spring hose through the release member 20 and the pull wire 302. When the clip 40 is released, the hook portion of the pull arm 204/205 is pulled. The wire 302 is deformed to be disengaged from the clip connection portion.

As shown in FIG. 1, the operating member 10 is coupled to the spring hose of the transport member 30 and the rear end of the pull wire 302, and the clip 40 is operated by driving the transport member 30. The operating member 10 can be a common structure in the art, and only one implementation of the operating member is exemplified herein. For example, the operating member 10 may include a main body 101, an operating lever 102 penetrating the inside of the main body 101, an operating block 103 fixedly coupled to the operating lever 102 to control the movement of the operating lever, and an operating handle 104 fixed to the rear end of the main body, and the operating block 103 is sleeved The front end of the spring hose is fixedly connected to the front end of the main body 101 of the operating member, and the rear end of the pulling wire 302 is connected with the front end of the operating rod 102 so as to be able to drive the pulling arm 204 under the action of the operating block. / 205 and further drive the clip 401 / 402 action.

As shown in FIG. 10-11, in the embodiment, as an implementation manner of the engaging mechanism, the engaging mechanism includes a card slot structure 401a/402a disposed on the clip 401/402 and on the stop member. The recessed protrusion 404c is provided. When the clip 401/402 is completely filled into the stop member, the slot structure 401a/402a of the clip firmly locks the protrusion 404c of the stop member, and the slot structure and the stop member The protrusions are in frictional contact.

Further, as shown in FIGS. 7 and 10, the bottom ends of the clips 401/402 are respectively provided with connection holes, and the pin tube 403 penetrates the connection hole of the clip to form a clip connection portion, and the hook portion of the pull arm 204/205 is connected. Yu (suspended) The pin tube 403 is on.

The stop member 404 can extend and retract from the distal end of the spring hose. As shown in FIG. 7, the stop member 404 has a lumen and a wing portion 404a/404b that can receive the clip 401/402, when the stop member 404 The wings 404a/404b are retracted into the inner cavity of the stop member 404 when in the spring hose, and when the stop member 404 extends beyond the front end of the spring hose, the wings 404a/404b are opened and snapped onto the spring hose At the end of the front end.

Further, as shown in FIG. 8, the pull arm 204/205 is composed of a head end 204a/205a, a middle section 204b/205b, and a tail end 204c/205c, and the pull arm head end 204a/205a is a non-closed hook structure, and the hook is The clips 401 / 402 are clearance fit by the pin tube 403. The middle section 204b/205b of the pull arm cooperates with the wings 404a/404b of the stop member. When the stop member 404 is in the spring hose, the wing contraction compresses and fixes the middle section 204b/205b of the pull arm when the stop member 404 At the outer end face of the spring hose, the wings 404a/404b expand and the pull arms 204/205 can advance and retreat within the interior of the stop member 404. The trailing end 204c/205c of the pull arm is fixedly coupled to the pull wire 302.

The operation steps of the soft tissue clip of the present invention include: the clip receives the spring hose, the clip extends out of the spring hose to grasp the tissue, the clip clamps the tissue, and the clip is released. First, the clip is received into the spring hose through a guiding device (not shown), and the pulling wire 302 is pushed forward to extend the clip out of the spring hose. The wing of the stopping member 404 is elastically expanded and pulled backward. The wire 302 is such that the wing portion abuts against the end surface of the spring hose. At this time, the clip 401/402 is pressed against the tissue, and the pulling wire 302 is continuously pulled to drive the pulling arm 204/205 to move, so that the clip 401/402 grasps the tissue. After the pull wire 302 is pulled back, the clip 401/402 is received in the stop member 404. At this time, the pull wire 302 is pulled again, the head hook of the pull arm 204/205 is deformed, and the clip is released from the pull arm 204/205, and the release is successful. The edge of the clip 401/402 is in frictional contact with the cavity wall of the stop member 404, and the head end of the clip is closed to form a positive pressure. The clamping arm of the clip 401/402 has a structure of a card slot 401a/402a, which forms a lock with the stop bump 404c.

When the stop member 404 is in the spring hose, the wing portion contracts into the inner cavity of the stop member, preventing the release mechanism from moving rearwardly in the inner cavity of the stop member 404, when the stop member 404 extends out of the spring hose When the distal end is open, the wing is opened at the end of the end of the spring hose, the release mechanism can be moved backward through the inner cavity of the stop member 404, and the clip 401/402 can be received into the inner cavity of the stop member 404. Further, the pull arm 204/205 or other connecting member may be provided with a step at a certain intermediate portion (for example, the pull arms 204a/205a and 204b/205b), and when the stop member 404 is in the spring hose, the stop member 404 The wings can be stuck at the steps to prevent pulling The arms 204/205 move rearwardly within the interior of the stop member 404.

In the soft tissue clip of the present invention, after the clip is clamped, the side edge of the clip is in frictional contact with the cavity wall of the stop member, and the front end of the clip is clamped to form a positive pressure closure, and at the same time, the card slot structure on the clamp arm of the clip is formed. The locking protrusion of the stop member forms a lock, so that the clip is locked for a long time until the tissue is completely closed and closed, and the tissue is detached together, and the hemostasis is safer.

Embodiment 2

On the basis of the first embodiment, as a modification of the engaging mechanism of the clip and the stopper, as shown in FIGS. 12 and 13, the stopper 404 has a stepped hole 414, and the clip 401/402 is provided. The barb structure 411 / 412, after the clip 401 / 402 fully receives the stop 404, continues to pull the clip 40, the barb structure 411 / 412 of the clip 401 / 402 firmly stuck into the step hole 414 of the stop 404 .

Such a structure can further clamp the tissue to the clip, and the clip can be locked for a longer period of time until the tissue is completely closed and then detached from the tissue.

It should be noted that the engagement method of the above-described engagement method and the embodiment may be implemented separately or simultaneously. When implemented at the same time, the two kinds of engaging mechanisms can be disposed at different positions of the clip and the stop member, such as the forearm or the tail arm, but are not limited to these two positions.

In addition, the clip can be received into the spring hose by the guiding device. For example, the guiding hole in the guiding device can be arranged as a tapered hole, and the wing portion of the stopping member 404 is loaded into the guiding hole, and the clip 40 is collected through the guiding hole. Into the spring hose.

The content described in the embodiments of the present specification is merely an enumeration of the implementation forms of the inventive concept, and the scope of the present invention should not be construed as being limited to the specific forms stated in the embodiments. Equivalent technical means that a person can think of in accordance with the inventive concept.

Claims

A soft tissue clip characterized by comprising a clip, a conveying member and an operating member,

The clip includes a pair of clips and a stop member for receiving the clips, the pair of clips being joined by respective bottom ends to form a clip connection portion, when the pair of clips are fully utilized After the stop member, the side edges of the pair of clips are in frictional contact with the cavity wall of the stop member such that the head end of the clip is sufficiently closed, and the pair of clips and the stop member Locked by the locking mechanism;

The conveying member comprises a spring hose, a pulling wire and a releasing member, the pulling wire is inserted through the inner cavity of the spring hose; the releasing member comprises two pulling arms, and the front ends of the two pulling arms are respectively provided a hook portion, the two pull arms are connected to the clip connecting portion through hook portions of the respective front ends, the rear ends of the two pull arms are respectively fixedly connected with the front end of the pull wire; the clip passes The release member and the traction wire can receive and extend the front end of the spring hose, and when the clip is released, the hook portion of the pull arm is deformed by the pulling wire to be disengaged from the clip connecting portion;

The operating member is coupled to a spring hose of the conveying member and a rear end of the pull wire, and the clip is operated by driving the conveying member.
The soft tissue clip according to claim 1, wherein the engaging mechanism comprises a card slot structure provided on each of the clips and a concave protrusion provided on the stop member. After the pair of clips completely collect the stop member, the card slot structure of the clip firmly locks the protrusion of the stop member.
The soft tissue clip according to claim 1, wherein said engaging mechanism comprises a barb structure provided on said pair of clips and a stepped hole provided in said stop member, said pair After the clip is completely received by the stop member, the barb structure of the clip is firmly caught in the stepped hole of the stop member.
The soft tissue clip according to claim 1, wherein the bottom ends of the pair of clips are respectively provided with connecting holes, and the pin tubes penetrate the connecting holes of the pair of clips to form the clip connecting portion. A hook portion of the pull arm is coupled to the pin tube.
The soft tissue clip according to claim 1, wherein said stop member has an inner cavity and a wing portion for receiving said clip, and said wing portion is contracted when said stop member is located in said spring hose In the inner cavity of the stop member, the wing portion is opened and caught at the end surface of the front end portion of the spring hose when the stopper member protrudes from the front end of the spring hose.
The soft tissue clip according to claim 5, wherein the middle portion of the pull arm is provided a step, when the stop member is in the spring hose, the wing of the stop member is caught at the step to prevent the pull arm from moving rearward in the inner cavity of the stop member.
The soft tissue clip according to claim 1, wherein the operating member comprises a main body, an operating rod penetrating the main body, an operating block sleeved on the main body and fixedly connected to the operating rod, and a fixing block. An operation handle of the rear end of the main body, the operation block is slidably sleeved on the main body, and a rear end of the spring hose is fixedly connected to a front end of the main body of the operation component, and the rear of the traction line The end is connected to the front end of the operating lever.