Auxiliary dense net stent anchored at far end of stent and provided with near-end balloon

Abstract

The utility model relates to the technical field of vascular intervention, in particular to a stent far-end anchoring near-end mechanical balloon auxiliary dense net stent which comprises a far-end anchoring stent, a stent conveying micro catheter, a conveying micro guide wire, a near-end dense net stent and a near-end mechanical balloon. The far-end anchoring support, the near-end dense net support and the near-end mechanical balloon share a transmission micro guide wire. A common micro guide wire guides a stent conveying micro catheter to reach the far end of a target blood vessel, after the common micro guide wire is withdrawn, a far-end anchoring stent, a near-end mechanical balloon and a near-end dense net stent which are folded in advance are fed into the stent conveying micro catheter along a guide sheath tube, a near-end conveying guide wire of a pushing system reaches the position of the target blood vessel, and the far-end anchoring stent is released. By means of the supporting and pulling effects of the far-end anchoring support on the conveying micro guide wire, the near-end dense net support is assisted to smoothly pass through the neck of the huge aneurysm, and the near-end mechanical balloon is used for unfolding assistance to assist the near-end dense net support to be smoothly unfolded and formed when the near-end dense net support is bent.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vascular intervention technical field especially a kind of stent distal end anchoring proximal balloon auxiliary dense network stent. BACKGROUND

[0002] In recent years, dense network stent implantation becomes an important means of aneurysm treatment, its extremely high aneurysm cure rate and relatively simple operation are favored by more and more operators and patients, and it plays an irreplaceable role in the treatment of giant aneurysm, so that dense network stent becomes a hot product in aneurysm surgery in recent years.

[0003] However, the currently used dense network stent has many problems, first, in the surgery of giant aneurysm, if the stent microcatheter is still unable to successfully conform to the shape of blood vessel in the aneurysm cavity, the microcatheter needs to be repeatedly adjusted or the stent distal end needs to be partially released and anchored during the operation, and the pulling effect generated after the stent distal end is partially released and anchored can assist the proximal end of the stent microcatheter to be released; repeatedly adjusting the microcatheter may cause thrombosis in the blood vessel or rupture of the aneurysm, and the repeated operation of the stent after partial release and anchoring may easily cause the stent to shift or the stent to come out of the target blood vessel site; these mistakes can directly cause all previous efforts to be in vain, and the operation needs to be started again from zero; and when the stent passes through the aneurysm neck, the stent may easily protrude into the aneurysm cavity due to the lack of external support of the aneurysm wall and the lack of internal support of the guide wire. The stent protruding into the aneurysm cavity may cause the stent to fail to release, need to use double-stent overlapping or multiple-stent overlapping surgery, or cause serious surgical complications such as aneurysm vascular reconstruction failure, thrombosis in the stent, and thrombosis in the target blood vessel.

[0004] Therefore, the existing dense network stent design cannot meet the relevant requirements of the surgery in the surgery of giant aneurysm, and the objective shortcomings of the existing dense network stent design increase the risk of surgery, and ultimately may affect the effect of the surgery. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of stent distal end anchoring proximal balloon auxiliary dense network stent, to solve the problem that the stent easily repeatedly protrudes into the aneurysm cavity due to the lack of internal and external support when the dense network stent passes through the aneurysm neck, and causes the surgery to fail.

[0006] The utility model provides a kind of bracket far-end anchoring proximal balloon auxiliary dense network bracket for realizing the above-mentioned purpose, including far-end anchoring bracket, bracket delivery microcatheter, transmission micro guide wire, proximal dense network bracket and proximal mechanical balloon;The far-end anchoring bracket is fixed to the transmission micro guide wire end, the proximal mechanical balloon is sleeved on the transmission micro guide wire, and it is located far from the far-end anchoring bracket side, the proximal dense network bracket is sleeved on the proximal mechanical balloon outside, and the bracket delivery microcatheter is respectively arranged on the transmission micro guide wire, the far-end anchoring bracket, the proximal dense network bracket and the proximal mechanical balloon outside.

[0007] Wherein, the bracket far-end anchoring proximal balloon auxiliary dense network bracket further includes fixed seat, reset piece and poking block, the fixed seat is arranged on the transmission micro guide wire side far from the far-end anchoring bracket, the reset piece is arranged on the fixed seat outside, the poking block is fixedly connected with the reset piece, and it is located on the reset piece side far from the fixed seat.

[0008] Wherein, the reset piece includes spring and sliding sheet, the spring is fixedly connected with the fixed seat, and it is located on the fixed seat outside, the sliding sheet is fixedly connected with the spring, and is slidably connected with the fixed seat, and it is located on the spring side.

[0009] Wherein, the poking block includes connecting portion and poking portion, the connecting portion is fixedly connected with the sliding sheet, and it is located on the sliding sheet side far from the spring, the poking portion is fixedly connected with the connecting portion, and it is located on the connecting portion side far from the sliding sheet.

[0010] Wherein, the bracket far-end anchoring proximal balloon auxiliary dense network bracket further includes friction pad, the friction pad is fixedly connected with the poking portion, and it is located on the poking portion side.

[0011] The utility model discloses a kind of support far-end anchoring proximal balloon auxiliary dense network support, the far-end anchoring support, the proximal dense network support and the proximal mechanical balloon share the conveying micro guide wire, the far-end anchoring support is fixed in the conveying micro guide wire end, the proximal mechanical balloon is sleeved on conveying micro guide wire, the conveying micro guide wire is set before and after the proximal mechanical balloon sleeve interval two ends front and rear clamping points, the proximal mechanical balloon activity is limited in the conveying micro guide wire front and rear clamping point interval inside.The proximal dense network support is sleeved on the proximal mechanical balloon outer periphery in unopened state, the support conveying micro catheter is hollow homogeneous pipeline, the lumen diameter of the support conveying micro catheter is not less than 0.029inch.In actual operation, ordinary micro guide wire guides the support conveying micro catheter to reach target blood vessel far end, after withdrawing ordinary guide guide wire, the far-end anchoring support, the proximal mechanical balloon and the proximal dense network support are sent into the support conveying micro catheter along guide sheath tube, proximal conveying guide wire reaches target blood vessel site, carries out the far-end anchoring support release, by the support and pulling effect of the far-end anchoring support to the conveying micro guide wire, and then auxiliary proximal dense network support successfully through giant aneurysm neck, and through the proximal mechanical balloon unfolding auxiliary, assist the proximal dense network support to be successfully unfolded into shape when passing bend.The support system can solve the problem that support displacement is caused by no support or insufficient support in the far end during the release process of the dense network support, and also perfectly solve the problem that repeated intrusion into aneurysm cavity is caused by the lack of internal and external support when the support passes through aneurysm neck, resulting in surgical failure. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description.

[0013] Figure 1 is a schematic diagram of a support far-end anchoring proximal balloon auxiliary dense network support being sent into blood vessel through support conveying catheter.

[0014] Figure 2 is a far-end anchoring support half-release state schematic diagram of a support far-end anchoring proximal balloon auxiliary dense network support.

[0015] Figure 3 is a far-end anchoring support release state and proximal dense network support half-release state schematic diagram of a support far-end anchoring proximal balloon auxiliary dense network support.

[0016] Figure 4 is a proximal dense network support release state and proximal mechanical balloon complete opening state schematic diagram of a support far-end anchoring proximal balloon auxiliary dense network support.

[0017] Figure 5 is a half-recovery state schematic view of the distal anchoring support of the stent.

[0018] Figure 6 is a full-recovery state schematic view of the distal anchoring support of the stent.

[0019] Figure 7 is a schematic view of the combination of the stent.

[0020] Figure 8 is a schematic view of the structure of the fixing seat, the reset piece and the poking block of the stent.

[0021] In the figure: 1-distal anchoring support, 2-stent delivery microcatheter, 3-delivery micro guide wire, 4-proximal dense network stent, 5-proximal mechanical balloon, 6-fixing seat, 7-reset piece, 8-poking block, 9-friction pad, 71-spring, 72-sliding piece, 81-connection part, 82-poking part. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0023] Please refer to Figures 1 to 8 The present application provides a stent distal anchoring proximal balloon assisted dense network stent, which comprises a distal anchoring support 1, a stent delivery microcatheter 2, a delivery micro guide wire 3, a proximal dense network stent 4 and a proximal mechanical balloon 5. The distal anchoring support 1 is fixed to the end of the delivery micro guide wire 3, the proximal mechanical balloon 5 is sleeved on the delivery micro guide wire 3, and is located away from the distal anchoring support 1 side, the proximal dense network stent 4 is sleeved on the outer periphery of the proximal mechanical balloon 5, and the stent delivery microcatheter 2 is arranged outside the delivery micro guide wire 3, the distal anchoring support 1, the proximal dense network stent 4 and the proximal mechanical balloon 5 respectively.

[0024] In the embodiment, the distal anchoring stent 1, the delivery micro guide wire 3, the proximal dense mesh stent 4 and the proximal mechanical balloon 5 can be coaxially delivered through the stent delivery micro catheter 2 in the folded state. The proximal mechanical balloon 5 is sleeved on the delivery micro guide wire 3. The delivery micro guide wire 3 is provided with front and rear clamping points at both ends of the proximal mechanical balloon 5. The proximal mechanical balloon 5 is limited in movement within the distance between the front and rear clamping points of the delivery micro guide wire 3. The proximal dense mesh stent 4 is sleeved on the outer periphery of the proximal mechanical balloon 5 in the unopened state. The stent delivery micro catheter 2 is a hollow homogeneous pipeline. The lumen diameter of the stent delivery micro catheter 2 is not less than 0.029 inch. In actual operation, the common micro guide wire guides the stent delivery micro catheter 2 to the distal end of the target blood vessel. After the common guide wire is withdrawn, the distal anchoring stent 1, the proximal mechanical balloon 5 and the proximal dense mesh stent 4 which are folded in advance are sent into the stent delivery micro catheter 2 along the guide sheath tube. The proximal delivery guide wire of the pushing system reaches the target blood vessel site. The distal anchoring stent 1 is released. With the support and pulling action of the distal anchoring stent 1 on the delivery micro guide wire 3, the proximal dense mesh stent 4 is further assisted to smoothly pass through the huge aneurysm neck and is expanded with the assistance of the proximal mechanical balloon 5. The proximal dense mesh stent 4 is smoothly expanded when passing through the bend. The stent can solve the problem that the proximal dense mesh stent 4 is displaced due to lack of support or insufficient support at the distal end during the release process. Meanwhile, the stent can also perfectly solve the problem that the stent repeatedly protrudes into the aneurysm cavity due to lack of internal and external support when passing through the aneurysm neck, resulting in surgical failure.

[0025] Further, the stent distal anchoring proximal balloon auxiliary dense mesh stent further comprises a fixing seat 6, a reset piece 7 and a poking block 8. The fixing seat 6 is arranged on the side of the delivery micro guide wire 3 away from the distal anchoring stent 1. The reset piece 7 is arranged on the outer side of the fixing seat 6. The poking block 8 is fixedly connected with the reset piece 7 and is located on the side of the reset piece 7 away from the fixing seat 6.

[0026] In the embodiment, the fixing seat 6 is arranged on the reset piece 7 and the poking block 8. The delivery micro guide wire 3 passes through the fixing seat 6. The arrangement of the poking block 8 facilitates the doctor to pull or poke the delivery micro guide wire 3, so as to pull out or send the distal anchoring stent 1, the delivery micro guide wire 3 and the proximal dense mesh stent 4 into the blood vessel. The arrangement of the reset piece 7 is used to reset the poking block 8 after the poking block 8 is loosened.

[0027] Further, the reset piece 7 comprises a spring 71 and a sliding piece 72. The spring 71 is fixedly connected with the fixing seat 6 and is located on the outer side of the fixing seat 6. The sliding piece 72 is fixedly connected with the spring 71 and is slidably connected with the fixing seat 6 and is located on the side of the spring 71.

[0028] In the embodiment, when the toggle block 8 is operated, the slide 72 slides on the fixed seat 6, thereby compressing or stretching the spring 71, and after the toggle block 8 is released, the spring 71 resets to reset the toggle block 8.

[0029] Further, the toggle block 8 comprises a connecting part 81 and a toggle part 82, the connecting part 81 is fixedly connected with the slide 72 and located on the side of the slide 72 away from the spring 71, and the toggle part 82 is fixedly connected with the connecting part 81 and located on the side of the connecting part 81 away from the slide 72.

[0030] In the embodiment, the connecting part 81 is used for the toggle part 82 and the slide 72, and the toggle part 82 is used for a doctor to pull or toggle the delivery micro guide wire 3.

[0031] Further, the stent distal anchoring proximal balloon assisted dense network stent further comprises a friction pad 9, which is fixedly connected with the toggle part 82 and located on one side of the toggle part 82.

[0032] In the embodiment, the friction pad 9 is arranged to enhance the friction between the toggle part 82 and the delivery micro guide wire 3, so as to avoid the delivery micro guide wire 3 from slipping when being pulled or toggled, thereby affecting the operation efficiency.

[0033] The above only discloses a preferred embodiment of the stent distal anchoring proximal balloon assisted dense network stent, and cannot be used to limit the scope of the present application. Those skilled in the art can understand that all or part of the processes of the above embodiment can be implemented, and equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A stent distal anchoring proximal balloon assisted dense mesh stent, characterized in that, It comprises a distal anchoring stent, a stent delivery microcatheter, a delivery microguide wire, a proximal dense mesh stent and a proximal mechanical balloon. The distal anchoring stent is fixed to the end of the delivery microguide wire, the proximal mechanical balloon is sleeved on the delivery microguide wire and located away from the distal anchoring stent, the proximal dense mesh stent is sleeved outside the proximal mechanical balloon, and the stent delivery microcatheter is arranged outside the delivery microguide wire, the distal anchoring stent, the proximal dense mesh stent and the proximal mechanical balloon respectively.

2. The stent distal anchoring proximal balloon assisted dense mesh stent of claim 1, characterized in that, The stent distal anchoring proximal balloon assisted dense mesh stent further comprises a fixing seat, a reset piece and a poking block, the fixing seat is arranged on the side away from the distal anchoring stent of the delivery microguide wire, the reset piece is arranged outside the fixing seat, and the poking block is fixedly connected with the reset piece and located on the side away from the fixing seat of the reset piece.

3. The stent distal anchoring proximal balloon assisted dense mesh stent of claim 2, characterized in that, The reset piece comprises a spring and a sliding sheet, the spring is fixedly connected with the fixing seat and located outside the fixing seat, the sliding sheet is fixedly connected with the spring and slidably connected with the fixing seat and located on the side of the spring.

4. The stent distal anchoring proximal balloon assisted dense mesh stent of claim 3, characterized in that, The poking block comprises a connecting part and a poking part, the connecting part is fixedly connected with the sliding sheet and located on the side away from the spring of the sliding sheet, and the poking part is fixedly connected with the connecting part and located on the side away from the sliding sheet of the connecting part.

5. The stent distal anchoring proximal balloon assisted dense mesh stent of claim 4, characterized in that, The stent distal anchoring proximal balloon assisted dense mesh stent further comprises a friction pad, the friction pad is fixedly connected with the poking part and located on the side of the poking part.

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