CN201150579Y

CN201150579Y - Blood vessel weaving stent with outer-layer lobate structure

Info

Publication number: CN201150579Y
Application number: CNU200720077277XU
Authority: CN
Inventors: 张宪淼; 张维鑫; 李军生
Original assignee: Shanghai Kangdelai Enterprise Development Group Co Ltd
Current assignee: Shanghai Kangdelai Enterprise Development Group Co Ltd
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2008-11-19
Anticipated expiration: 2017-12-26

Abstract

The utility model discloses a knitted vascular stent with an outer linguiform structure, which is knitted by wires and comprises a circular tube network body and at least one outer linguiform structure connected in the middle portion of the body. The circular tube network body comprises a plurality of deformable units formed by circling mesh wires, a plurality of curved wire bends are formed at two ends of the network body, and the intersection point of each mesh wire is in sliding contact connection. The outer linguiform structure is formed by circling single mesh wire, wherein the lingual radix is connected on the network body, the tongue which is a free end extends out from the network body along the axial direction of the network body. The surface of the knitted vascular stent is uniformly coated with a medication coating. The knitted vascular stent with an outer linguiform structure not only can maintain a higher radial holding power, but has sound axial flexibility and blood vessel compliance, which is capable of preventing impulse by blood, effectively reducing incidence rate of vascular restenosis by the surface medication coating, and decreasing complications of patients after the vascular stent is implanted.

Description

A kind of braided blood vessel stent with outer tongue structure

Technical field

This utility model relates to a kind of medical apparatus and instruments, particularly a kind of braided blood vessel stent that is applicable to the outer tongue structure of the band in the human vas interventional therapy field.

Background technology

Puncture shaping surgery, be called for short the PTA art, be under the guiding of medical imaging device, utilize puncture needle, seal wire and guiding sheath that the foley's tube of the support that is with deflation is injected human vas, and be transported to the angiostenosis place, expansion with sacculus, support is also strutted, and after sacculus shrank back and removes, the metal rack that produces plastic deformation was then stayed the original place, and embedded blood vessel, play the effect of blood vessel dilating.The method makes that the long-term efficacy of operation is good.

Angle from clinical use, the braided blood vessel stent design of the outer tongue structure of band of the outer tongue structure of the band of the outer tongue structure of a kind of ideal band will have following technical specification simultaneously: enough radial support power, good axial compliance, little radially bounce-back than and axial LVFS, moderate metal space occupied area is than (10%-20%) etc.A good support should reach effective unification in these areas.

The intravascular stent form of prior art has multiple, and they have their own characteristics each, and its purpose all is to improve the radial support intensity of support and axial function such as flexibility.But existing support is difficult to reach effective unification because of its structural limitation aspect these two, though some support expansion back support force is stronger, axially flexibility is not good enough, and metal surface coverage rate and axial LVFS are bigger; Though some support is better softness axially, radial support power deficiency, the metal surface coverage rate is less, causes vascular restenosis easily, so still remain further to be improved.

Summary of the invention

The purpose of this utility model is to provide a kind of and can keeps higher radial support power that the axially braided blood vessel stent of compliance and vascular compliance, the outer tongue structure of the axial band that LVFS is very little, the metal surface coverage rate is moderate is arranged again well after expansion.

The purpose of this utility model is achieved through the following technical solutions: a kind of braided blood vessel stent with outer tongue structure, form by the elastic metallic yarn braiding, comprise a tubular network body and at least one the outer tongue structure that is connected this body middle part, tubular network body comprises a plurality of deformable unit that surrounded by netting twine, forming a plurality of curved lines at the two ends of network body turns, each netting twine is slidably contact connection at the place, cross point, outer tongue structure is surrounded by single netting twine and forms, its root of the tongue is connected on the network body, tongue is that free end is originally external along axially stretching out at network of network body, and the surface of described braided blood vessel stent evenly is coated with the medication coat that one deck can prevent vascular restenosis.

The braided blood vessel stent of the outer tongue structure of above-mentioned band, wherein, between outer tongue structure and the network body shape in an angle, promptly the free end of outer tongue structure outwards opens.

The braided blood vessel stent of the outer tongue structure of above-mentioned band, wherein, the angle between outer tongue structure and the network body is the 5-30 degree.

The braided blood vessel stent of the outer tongue structure of above-mentioned band, wherein, outer tongue structure is two, two outer tongue structures are along the radial symmetric setting of network body.

The braided blood vessel stent of the outer tongue structure of above-mentioned band, wherein, outer tongue structure is 3,3 outer tongue structures radially are 120 degree corner settings along the network body.

The above is with the braided blood vessel stent of outer tongue structure, and wherein, support is its free state or typing state behind knitting forming, can be made axial elongation by radial compression under external force, recovers its free state or typing state after the pressure relief.

The braided blood vessel stent of the outer tongue structure of above-mentioned band wherein, is coated with a plurality of opacity spike rings respectively on the netting twine of network body different parts.

The braided blood vessel stent of the outer tongue structure of above-mentioned band, wherein, support uses towards the flow direction of blood according to the free end of outer tongue structure.

The braided blood vessel stent of the outer tongue structure of above-mentioned band, wherein, with the braided blood vessel stent of outer tongue structure, wherein, the composition of described medication coat comprises Organic substance carrier, additive, medicine.

The braided blood vessel stent of the outer tongue structure of this utility model band is owing to adopted above technical scheme, make support after expansion, can keep higher radial support power, well axial compliance and vascular compliance are arranged again, the free end of the outer tongue structure during use in the support is towards the flow direction of blood, help the fixing of support, prevent to be got excited by blood, simultaneously, the intravascular stent of band medication coat can reduce the incidence rate of vascular restenosis effectively, and reduces the generation of the complication of patient behind the implantable intravascular support.

Description of drawings

Fig. 1 is the structural representation of facing of the present utility model.

Fig. 2 is the expansion view of Fig. 1.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

See also Fig. 1, Fig. 2, the braided blood vessel stent of the outer tongue structure of band of the present utility model, form by the elastic metallic yarn braiding, comprise a tubular network body 1 and at least one the outer tongue structure 2 that is connected this body middle part, tubular network body 1 comprises a plurality of deformable unit 11 that surrounded by netting twine, form a plurality of curved lines at the two ends of network body and turn 12, each netting twine is slidably contact connection at the place, cross point.Outer tongue structure is surrounded by single netting twine and forms, and its root of the tongue 21 is connected on the network body, and tongue 22 is originally external along axially stretching out at network of network body for free end.Form the angle of a 5-30 degree between outer tongue structure and the network body, promptly the free end of outer tongue structure outwards opens, and also is coated with a plurality of opacity spike rings 3 on the netting twine of network body different parts respectively.

Outer tongue structure in this utility model can be set to two, and when outer tongue structure was two, two outer tongue structures were along the radial symmetric setting of network body.

Outer tongue structure in this utility model can be set to 3, and when outer tongue structure was 3,3 outer tongue structures radially were 120 degree corner settings along the network body.Fig. 1, the intravascular stent that is 3 outer tongue structures shown in Figure 2.

The braided blood vessel stent of the outer tongue structure of band of the present utility model is its free state or typing state behind knitting forming, and this support can be made axial elongation by radial compression under external force, recovers its free state or typing state after the pressure relief.

The braided blood vessel stent of the outer tongue structure of band of the present utility model free end according to outer tongue structure when implantable intravascular is implanted towards the flow direction of blood.

The radial dimension and the axial length of the braided blood vessel stent of the outer tongue structure of band of the present utility model weave as required.

The surface of braided blood vessel stent of the present utility model evenly is coated with the medication coat that one deck can prevent vascular restenosis, and the composition of medication coat comprises Organic substance carrier, additive, medicine, the existing public technology of this medication coat.

Below embodiment has been described in detail this utility model in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to this utility model according to the above description.Thereby some details among the embodiment should not constitute qualification of the present utility model, and the scope that this utility model will define with appended claims is as protection domain of the present utility model.

Claims

1, a kind of braided blood vessel stent with outer tongue structure, it is characterized in that: form by the elastic metallic yarn braiding, comprise a tubular network body and at least one the outer tongue structure that is connected this body middle part, tubular network body comprises a plurality of deformable unit that surrounded by netting twine, forming a plurality of curved lines at the two ends of network body turns, each netting twine is slidably contact connection at the place, cross point, outer tongue structure is surrounded by single netting twine and forms, its root of the tongue is connected on the network body, tongue is that free end is originally external along axially stretching out at network of network body, and the surface of described braided blood vessel stent evenly is coated with the medication coat that one deck can prevent vascular restenosis.

2, the braided blood vessel stent of the outer tongue structure of band according to claim 1 is characterized in that: between described outer tongue structure and the network body shape in an angle, promptly the free end of outer tongue structure outwards opens.

3, the braided blood vessel stent of the outer tongue structure of band according to claim 2 is characterized in that: the angle between described outer tongue structure and the network body is the 5-30 degree.

4, according to the braided blood vessel stent of claim 1 or the outer tongue structure of 2 or 3 described bands, it is characterized in that: described outer tongue structure is two, and two outer tongue structures are along the radial symmetric setting of network body.

5, according to the braided blood vessel stent of claim 1 or the outer tongue structure of 2 or 3 described bands, it is characterized in that: described outer tongue structure is 3, and 3 outer tongue structures radially are 120 degree corner settings along the network body.

6, the braided blood vessel stent of the outer tongue structure of band according to claim 1, it is characterized in that: described support is its free state or typing state behind knitting forming, can under external force, be made axial elongation, recover its free state or typing state after the pressure relief by radial compression.

7, the braided blood vessel stent of the outer tongue structure of band according to claim 1 is characterized in that: be coated with a plurality of opacity spike rings on the netting twine of described network body different parts respectively.

8, the braided blood vessel stent of the outer tongue structure of band according to claim 1 is characterized in that: described support uses towards the flow direction of blood according to the free end of outer tongue structure.