CN209437425U

CN209437425U - A kind of two-way soft big blood vessel diaphragm support of hangnail

Info

Publication number: CN209437425U
Application number: CN201822014771.2U
Authority: CN
Inventors: 郑俊猛; 赵宗凯; 吴志超
Original assignee: 赵宗凯
Current assignee: Sun Yat Sen Memorial Hospital Sun Yat Sen University
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2019-09-27
Anticipated expiration: 2028-12-03

Abstract

The utility model discloses a kind of two-way soft big blood vessel diaphragm support of hangnail, bracket is made of self-expanding stent, internal layer braiding layer, outer layer hangnail layer.There is two-way barb structure in the design of bracket hangnail layer, increases the coefficient of friction between bracket and endangium, prevent stent migration.Self-expanding stent is located at hangnail carrier openings, can be with the full of auxiliary stand, so that the firm note of bracket outer membrane invests on big endangium.The anchoring that bracket is carried out by internal stent itself blood pressure and bracket surface layer hangnail of the utility model patent novelty.On the one hand, it reduces interior metal bracket to reduce to blood vessel internal membrane damage the radial pressure of vascular wall, while reducing backing thickness, so that bracket is machinable more tiny.On the other hand, bracket hangnail layer is two-way barb structure, when blocking the biggish dissection of aorta of cut and large aneurysm, can prevent rack far end from sliding into the complication such as leakage in interlayer or the generation of knurl inside.

Description

A kind of two-way soft big blood vessel diaphragm support of hangnail

Technical field

The utility model relates to a kind of medical instruments, specifically for treating the bracket isolating device of arterial disease.

Background technique

Endovascular graft (endovascular graft exclusion, EVGE) is the new technology occurred in recent years, is used for The macroangiopathies such as minimally-invasive treatment artery dissection, aneurysm, are compared to traditional operation, have the spies such as the small, few intercurrent disease of wound Point.

It is applied to the design method that clinical aortic stents mostly use greatly super-elastic metal rack surface overlay film at present.Its The frictional force of the pressure and overlay film surface that are mainly generated by bracket to vascular wall provides certain anchoring, selected metal branch Frame expanded diameter is generally higher than patient's native blood vessel internal diameter, this allows for bracket and is easy to tear fragile endangium, from And lead to the complication such as new hair clip layer, interior leakage.The elasticity of metallic support is far longer than blood vessel, if patient sustainer intimal lesion Heavier, the pressure of metallic support will lead to bracket and directly break into false chamber, this is the high complication of risk.Part intravascular stent Design has metal barb, and hangnail number is less, although can increase the anchorage force of bracket, equally also increases to endangium Damage, the bracket of high rigidity is unfavorable for it and uses and discharge, it is not easy to by being bent aorta, be easy to pierce through endangium, Potential risks are formed, the safety of patient is threatened.

Therefore, it is necessary to design a kind of novel intravascular stent, while having enough anchorage forces, endangium will not be produced Raw excessively high pressure, while can be preferably bonded with Wall of Artery.

Summary of the invention

The purpose of the utility model is to overcome deficiencies existing for current existing bracket to propose a kind of novel intravascular stent, Solve that existing bracket is excessive to vascular pressure to be easy to cause that endangium tearing, bracket excessive high hardness is bonded not with blood vessel inner arm Well, the problems such as being easy to happen displacement, interior leakage.

In order to solve the above technical problems, the utility model patent proposes a kind of two-way soft big blood vessel diaphragm support of hangnail, It is characterized in that, bracket is made of self-expanding stent, internal layer braiding layer, outer layer hangnail layer.

Preferably, the outer layer hangnail layer design has fine and closely woven barb structure, and hangnail is cut by machinery or hot pressing injection molding Or the modes such as common mold technique complete the process, hangnail is distributed in bracket outer layer, and hangnail arrangement is fine and closely woven, and curtailment is dynamic to pierce through Arteries and veins inner membrance, hangnail is soft, and has certain toughness, can provide bracket enough anchorage forces.

Further, outer layer hangnail arrangement mode can be for longitudinally, laterally or helical arrangement.

Preferably, bracket starting and main part hangnail tip direction, stent ends hangnail tip identical as blood flow direction Direction is opposite with blood flow direction.

Internal layer braiding layer is woven by single, two or more high-intensitive biocompatible materials, as terylene, Metal fiber wire, polytetrafluoroethylene (PTFE).Internal layer braiding layer is also possible to other single high molecular polymer such as polyvinyl chloride (PU), gathers Polyethylene terephthalate (PET).In bracket release conditions, by braiding layer and the elastic reaction of hangnail layer itself, bracket can be with Maintain nature expansion, the tension generated when blood flow in addition, so that bracket attaches enough.

Self-expanding stent is located at the opening of overlay film frame, can pass through the elasticity of itself during bracket release It opens, plays the full effect of positioning, support and auxiliary stand.Self-expanding stent is positioned at left common carotid artery and left subclavian artery Between position, endangium is more solid herein, effectively can position and provide a part of anchoring effect.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model patent.

Fig. 2 is the drawing in side sectional elevation of the utility model patent.

Fig. 3 is the profilograph of the utility model patent.

Fig. 4 is a kind of schematic diagram of specific embodiment of the utility model patent.

Fig. 5 is the schematic diagram of another specific embodiment of the utility model patent.

Specific embodiment

In order to make those skilled in the art better understand the technical solution of the utility model, with reference to the accompanying drawing and specifically The utility model is further described in detail in embodiment.

Fig. 1 is the utility model patent structure schematic diagram.

As shown in Figure 1, the utility model patent bracket 4 includes self-expanding stent 1, internal layer braiding layer 2, outer layer hangnail layer 3.

Self-expanding stent 1 is made of elastic metallic yarn, applied by elasticity and the below current clinic of wire diameter Intravascular stent, plays the role of that positioning, auxiliary stand be full and certain anchoring.The storage of self-expanding stent and the same mesh of delivery mode Intravascular stent applied by preceding clinic, it is not described here in detail.

Internal layer braiding layer 2 is woven by single, two or more biocompatible materials, as terylene, metal are fine Tie up silk, polytetrafluoroethylene (PTFE).Internal layer braiding layer 2 is also possible to other high molecular polymers such as polyvinyl chloride (PU), polyphenyl dioctyl phthalate Second diester (PET).Internal layer braiding layer 2 and 3 close adhesion of outer layer hangnail layer, are supplied to bracket certain elasticity and tensile strength.

Outer layer hangnail layer 3 uses nondegradable high molecular material such as terylene, and surface hangnail 5 is cut by machinery or heat Pressure injection or common die cast complete the process, and hangnail is distributed in 4 surface of bracket, and hangnail is fine and closely woven, are not enough to pierce through lesion actively Arteries and veins inner membrance 9 substantially reduces the destruction to lesion aortic tunica intima, and can be supplied to the enough anchorage forces of bracket.

The technical solution in utility model section Example is carried out below with reference to the attached drawing of the utility model embodiment Description.

As shown in Figures 3 and 4,6 be dissecting aneurysm knurl, and interlayer cut is located at artery 7 under left collarbone and distally drops master Artery initial part after bracket is delivered to suitable position by stent delivery system 8, discharges the front end of bracket, from swollen first Under the auxiliary of swollen bracket 1, the full expansion in bracket front end, front end hangnail is identical as blood flow direction, in bracket under blood pressure, branch Frame outer layer hangnail layer and endangium are firmly combined, so that stent anchors, prevent bracket from continuing to slip backward, continue release branch Frame, after rack far end is across artery dissection knurl 6, hangnail direction and blood flow direction on the contrary, and under blood pressure with blood Pipe inner membrance secure fit avoids retrograde slip of rack far end and enters inside dissecting aneurysm body.Release self-expanding stent completely After withdraw from stent delivery system 8, complete the merging of bracket.

A kind of two-way soft big blood vessel diaphragm support of hangnail of the utility model patent has the advantages that

The design of the utility model intravascular stent has outer layer hangnail layer, and hangnail is divided to two groups, and bracket originates and main part hangnail Tip direction is identical as blood flow direction, and bracket front end hangnail can prevent bracket from slipping, shifting.Stent ends hangnail tip direction With blood flow direction on the contrary, stent ends hangnail can prevent stent ends from sliding into dissecting aneurysm or the false intracavitary portion of interlayer.This reality It is formed by single or multiple material braiding with novel vascular stent internal layer braiding layer and is had ultra-thin structure and stronger pull resistance Feature, while can have certain elasticity under Spontaneous release state, keep its expansion state.The utility model intravascular stent Body interior reduces metallic support to the pressure of endangium without elastomeric metallic support, to reduce bracket to blood vessel The destruction of inner membrance.The utility model intravascular stent has compact structure and higher suppleness, it is easier to pass through bending, disease The aorta of change, while improving compactness of the bracket with aorta wall.The utility model intravascular stent eliminates part metals Bracket greatly reduces the diameter of stent delivery system, has smaller wound to patient.

Claims

1. a kind of two-way soft big blood vessel diaphragm support of hangnail, which is characterized in that fallen by self-expanding stent, internal layer braiding layer, outer layer It pierces layer to constitute, internal layer braiding layer and outer layer hangnail layer are tubular structure, and outer layer hangnail closely fits in internal layer braiding layer appearance Face, self-expanding stent are located at diaphragm support opening.

2. the two-way soft big blood vessel diaphragm support of hangnail of one kind according to claim 1, which is characterized in that outer layer hangnail layer is set In respect of barb structure, hangnail is cut by machinery or hot pressing is molded or common mold technology mode completes the process, and hangnail is distributed in Bracket outer layer, barb length is in 0.3mm to the section 1mm.

3. the two-way soft big blood vessel diaphragm support of hangnail of one kind according to claim 2, which is characterized in that the arrangement of outer layer hangnail Mode can be for longitudinally, laterally or helical arrangement.

4. the two-way soft big blood vessel diaphragm support of hangnail of one kind according to claim 2, which is characterized in that bracket starting and master Body portion hangnail tip direction is identical as blood flow direction, and stent ends hangnail tip direction is opposite with blood flow direction.

5. the two-way soft big blood vessel diaphragm support of hangnail of one kind according to claim 1, which is characterized in that internal layer braiding layer by Single, two or more biocompatible materials weave.

6. the two-way soft big blood vessel diaphragm support of hangnail of one kind according to claim 5, which is characterized in that internal layer braiding layer It can be the polymer of polyvinyl chloride (PU) or poly- polyethylene terephthalate (PET).

7. the two-way soft big blood vessel diaphragm support of hangnail of one kind according to claim 5, which is characterized in that internal layer braiding layer with Outer layer hangnail layer close adhesion or suture.