CN209392163U - A kind of intravascular stent - Google Patents

Abstract

The utility model relates to a kind of intravascular stents, the intravascular stent is made of memory metal net, the intravascular stent is the hollow structure of both ends perforation, one end of at least described intravascular stent turns down to the other end and extends along the side wall of intravascular stent, so that the whole in the radial direction or regional area in the intravascular stent have the memory metal net of multiple-layer overlapped from inside to outside.One of the utility model has technical effect that the utility model will not block vessel branch in application, does not influence the blood supply function of vessel branch.

Description

A kind of intravascular stent

Technical field

The utility model relates to the field of medical instrument technology, more specifically, the utility model relates to a kind of intravascular stents.

Background technique

Overlay film frame refers to coating special film property material (polytetrafluoroethylene (PTFE), terylene, polyester, poly- amino on metallic support Ethyl formate etc.) bracket.Not only the function of metallic support, but also the characteristic with film property material had been remained.

Aneurysm is the lesion or damage due to arterial wall, forms the warty of arterial wall limitation or diffusivity expansion generation The aneurysm of protrusion, protrusion can cause patient to go out with thinning and final rupture haemorrhage is gradually disengaged under the continuous impact of blood flow Blood is dead.It mostly uses intervention to perform the operation aneurysmal treatment at present, compared with traditional surgery, has wound small, concurrent The advantages that disease is few, operating time is short, is gradually favored by doctor and patient.

Aneurysmal intervention operation is treated at this stage and mostly uses overlay film frame, since the outer surface in supporting support has resistance Film is flowed, blood is impermeable, therefore the technology may not apply to aneurysmal disease shown in FIG. 1 and conjugate setting in important branch (such as Branch etc. on aorta) aneurysm repair, otherwise its can cause vessel branch occlusion lead to serious vascular lesion.Another is asked It is the overlay film on metallic support that topic, which is overlay film frame, and after metallic support overlay film, just losing that part bending complies with can not be good Curved arteries is complied with, and be easy to cause choked flow film there are fold, causes thrombosis.

Therefore, it is necessary to provide a kind of new intravascular stent, at least one above-mentioned has been solved the problems, such as.

Utility model content

One purpose of the utility model is to provide a kind of new solution of intravascular stent.

One aspect according to the present utility model provides a kind of intravascular stent, and the intravascular stent is by memory metal net system Be the hollow structure of both ends perforation at, the intravascular stent, one end of at least described intravascular stent turned down to the other end and along The side wall of intravascular stent extends, so that the whole in the radial direction or regional area in the intravascular stent have from inside to outside The memory metal net of multiple-layer overlapped.

Optionally, the memory metal net is made of Nitinol.

Optionally, the memory metal net is cut by memory metal or memory wire is knitted to form.

Optionally, the diameter of the memory wire is 0.15mm-0.40mm.

Optionally, the intravascular stent is cylinder.

Optionally, one end of the intravascular stent turns down to the lateral direction of intravascular stent and along the side wall of intravascular stent Extend.

Optionally, the memory metal net of multiple-layer overlapped is 30%-100% along the side wall accounting of the intravascular stent.

Optionally, one end of the intravascular stent turns down and extends to the other end, forms part two layers or two superimposed Memory metal net.

Optionally, the both ends of the intravascular stent turn down and extend to the opposite other end, form two layers, two of part The memory metal net of layer, partial threelayer or three layers of overlapping.

Optionally, the memory metal net of described intravascular stent one end back and forth turns down on intravascular stent, forms the multilayer The memory metal net of overlapping.

One of the utility model has technical effect that the utility model will not block vessel branch in application, not shadow Ring the blood supply function of vessel branch.

By the detailed description referring to the drawings to the exemplary embodiment of the utility model, the utility model it is other Feature and its advantage will become apparent.

Detailed description of the invention

The attached drawing for constituting part of specification describes the embodiments of the present invention, and uses together with the description In explanation the principles of the present invention.

Fig. 1 is the arrangement schematic diagram of overlay film frame in the prior art.

Fig. 2 is the structural schematic diagram of the utility model embodiment 1.

Fig. 3 is the structural schematic diagram of the utility model embodiment 2.

Fig. 4 is the structural schematic diagram of the utility model embodiment 3.

Fig. 5 is the arrangement schematic diagram of the utility model embodiment 4.

In figure: 1 intravascular stent, 11 side walls, 2 memory metal nets, 3 blood vessels, 4 aneurysm lesion locations, 5 vessel branches.

Specific embodiment

The various exemplary embodiments of the utility model are described in detail now with reference to attached drawing.It should also be noted that unless another It illustrates outside, the component and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is unlimited The scope of the utility model processed.

Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to this is practical Novel and its application or any restrictions used.

Technology and equipment known to person of ordinary skill in the relevant may be not discussed in detail, but in appropriate situation Under, the technology and equipment should be considered as part of specification.

It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without It is as limitation.Therefore, other examples of exemplary embodiment can have different values.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.

Intravascular stent provided by the utility model, in some embodiments, embodiment 1-4, described referring to shown in Fig. 2-5 Intravascular stent 1 is made of memory metal net 2, forms the bracket with close net.

Further, the memory metal net 2 can have sufficiently resilient memory metal conduct using Nitinol etc. Prepare material to be made, so that it can either deformation occurs after by external force, additionally it is possible to by elastic force provide it is enough support and Restoring force.

Further, the memory metal net 2 can be the reticular structure for cutting and being formed to memory metal sheet；It can be with It is that establishment formation is carried out using memory wire；It can also be other sides for enabling to memory metal to form reticular structure Formula, the application are not intended to limit this.

Further, when working out to form memory metal net using memory wire, the diameter of memory wire be can be 0.15mm-0.40mm to reduce the thickness of memory metal net, and is capable of providing enough support forces；Further, memory gold The diameter for belonging to silk can be 0.20mm-0.30mm.

Intravascular stent 1 is the hollow structure of both ends perforation, and after being placed in blood vessel 3, blood can be normal through blood The both ends of pipe holder 1 are circulated, and are reduced intravascular stent and are caused to hinder to blood flow.

Intravascular stent 1 is made of memory metal net 2, when the diameter of intravascular stent 1 is greater than the diameter of blood vessel 3, by blood vessel After bracket 1 is placed in blood vessel 3, intravascular stent 1 can cooperate with blood vessel 3 and adjust, and intravascular stent 1 applies blood vessel 3 outer Expand power, blood vessel 3 inside contracts power to the application of intravascular stent 1, and the two all has elasticity, so as to mutually agree with.

Further, the intravascular stent 1 can be opening for cylinder, two end faces, form tubular structure, be convenient for Cooperate with blood vessel 3.

One end of the intravascular stent 1 turns down to the other end and extends along the side wall of intravascular stent 1 11, alternatively, can also Both ends to be intravascular stent 1 are turned down to the opposite other end, and are extended along the side wall of intravascular stent 1 11, so that described In the radial direction, whole or regional area have the memory metal net 2 of multiple-layer overlapped to intravascular stent 1 from inside to outside, are formed The close web frame of multilayer, every layer of memory metal net 2 interweave so that interlaced between grid screen work.

When the utility model is applied to treat in blood vessel 3, the region that memory metal net 2 is overlapped is corresponding with lesion region, Such as aneurysm lesion locations 4 shown in fig. 5, the close web frame of the multilayer that memory metal net 2 overlaps to form, blood pass through effective Area reduces, and is separated to form flow-disturbing by the close net of multilayer, can be changing into diffusion to aneurysmal blood impact conditions Stream flows to the haemodynamics of aneurysm site by change to reduce the blood surge in aneurysm, to reduce dynamic The thinning speed of removing at arteries and veins tumor position, allow inside aneurysm gradually thrombosis until endothelium regenerates, to treat aneurysm. On the other hand, the utility model will not shunting of the line artery 3 to vessel branch 5, the utility model outer layer, will not without choked flow film Vessel branch 5 is blocked not influence the blood supply function of vessel branch 5 so that vessel branch 5 is unimpeded.In addition, outer layer is without choked flow film, The bending that will not influence the utility model is pliable, and blood can be by memory metal net 2, will not when being applied to curved artery The fold for hindering blood flow is formed, the formation of thrombus is reduced.

In some embodiments, one end of the intravascular stent 1 turns down to the outside of intravascular stent 1 or turns down inwardly. Referring to Fig. 2-4, one end of the intravascular stent 1 is turned down to the outside of intravascular stent 1, is prolonged further along the side wall 11 of intravascular stent 1 It stretches.Referring to Fig. 5, one end of the intravascular stent 1 is turned down to the inside of intravascular stent 1, is prolonged further along the side wall 11 of intravascular stent 1 It stretches；It can also be regarded as being turned down to the outside of intravascular stent 1, extend beyond former side along the side wall 11 of intravascular stent 1 The length of wall 11, the application are not intended to limit this.

In some embodiments, it is 30%- that the memory metal net 2 of multiple-layer overlapped, which accounts for the specific gravity of the bracket direction of both ends, 100%.

Further, in some embodiments, referring to fig. 2, one end of the intravascular stent 1 turns down and prolongs to the other end It stretches, forms the memory metal net 2 of local two superimposed.It can also be the memory metal net 2 of whole two superimposeds, the application is to this It is not intended to limit.

Further, in some embodiments, the both ends of the intravascular stent 1 turn down and extend to the opposite other end, Referring to Fig. 3, the memory metal net 2 of local two superimposed is formed；It can also be the memory metal net 2 of whole two superimposeds；Referring to Fig. 4 can also be the memory metal net 2 of partial threelayer overlapping；It can also be the memory metal net 2 of all three layers of overlappings；This Shen Please this is not intended to limit.

In some embodiments, the memory metal net 2 on intravascular stent 1 can turn down the close net bracket to form variable diameter, with Different vessel positions is adapted to, is especially suitable for having vessel branch 5 and causes blood vessel 3 that there is the position of variable diameter.

In some embodiments, the spacing between every layer of the memory metal net 2 of multiple-layer overlapped is less than or equal to 1mm.

In some embodiments, the memory metal net 2 of 1 one end of intravascular stent can also be on intravascular stent 1 repeatedly, back and forth Fold, forms the memory metal net of the multiple-layer overlapped.

Although being described in detail by some specific embodiments of the example to the utility model, this field It is to be understood by the skilled artisans that above example merely to be illustrated, rather than in order to limit the scope of the utility model.This Field it is to be understood by the skilled artisans that can not depart from the scope of the utility model and spirit in the case where, to above embodiments It modifies.The scope of the utility model is defined by the following claims.

Claims (10)

1. a kind of intravascular stent, which is characterized in that the intravascular stent is made of memory metal net, and the intravascular stent is both ends One end of the hollow structure of perforation, at least described intravascular stent turns down to the other end and extends along the side wall of intravascular stent, makes There is the memory metal net of multiple-layer overlapped from inside to outside in the whole in the radial direction or regional area of the intravascular stent.

2. intravascular stent according to claim 1, which is characterized in that the memory metal net is made of Nitinol.

3. intravascular stent according to claim 1, which is characterized in that the memory metal net is cut or remembered by memory metal Recall metal wire knitted to be formed.

4. intravascular stent according to claim 3, which is characterized in that the diameter of the memory wire is 0.15mm- 0.40mm。

5. intravascular stent according to claim 1, which is characterized in that the intravascular stent is cylinder.

6. intravascular stent according to claim 1, which is characterized in that one end of the intravascular stent is to outside intravascular stent Side direction fold simultaneously extends along the side wall of intravascular stent.

7. intravascular stent according to claim 1, which is characterized in that the memory metal net of multiple-layer overlapped is along the blood vessel The side wall accounting of bracket is 30%-100%.

8. intravascular stent according to claim 7, which is characterized in that one end of the intravascular stent turns down simultaneously to the other end Extend, forms part two layers or the memory metal net of two superimposed.

9. intravascular stent according to claim 7, which is characterized in that the both ends of the intravascular stent are to opposite another End turn down simultaneously extend, formed part two layers, two layers, partial threelayer or three layers overlapping memory metal nets.

10. intravascular stent according to claim 1, which is characterized in that the memory metal net of described intravascular stent one end exists It is back and forth turned down on intravascular stent, forms the memory metal net of the multiple-layer overlapped.