CN115844605B

CN115844605B - Arterial vessel stent

Info

Publication number: CN115844605B
Application number: CN202310130849.XA
Authority: CN
Inventors: 李芬; 陈凌峰; 郭浩; 唐新华; 宋辉; 张倩倩; 李晓娜; 陈维毅
Original assignee: Taiyuan University of Technology
Current assignee: Taiyuan University of Technology
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-05-16
Anticipated expiration: 2043-02-17
Also published as: CN115844605A

Abstract

The invention discloses an arterial vessel stent, belonging to the technical field of medical appliances; the arterial vessel stent is a reticular cylindrical structure formed by coiling a primary framework and a secondary framework; the primary framework is formed by a plurality of first filar spirals 360 degrees; the secondary framework is formed by a plurality of second filar spirals of 720 degrees; the wire diameter of the first filament is larger than that of the second filament, and the intersection points of the first filament and the second filament are connected; the primary framework is used for changing the flow state of blood flow when the blood flow flows through the bracket; the secondary framework has the function of enhancing the strength of the rotating flow on the basis of connecting the primary framework; blood perfusion to the blood vessel of the branch can be increased; improving the transfer of substances between the influencing blood and the vessel wall.

Description

Arterial vessel stent

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to an arterial vessel stent.

Background

The blood vessel has a low wall surface shearing force area, and the neointimal hyperplasia after the stent bypass operation and the arteriovenous shunt operation can cause the blood vessel to be blocked. The possibility of thrombosis is increased by a too high index of oscillatory shear force at the anastomosis of the vascular prosthesis and the host and a too long relative residence time of the particles. LDL accumulates on the vessel wall and is oxidized to form Ox-LDL, which causes macrophages and vascular smooth muscle cells to necrotize and disintegrate, forming chyme necrosis. Stent implantation has three effects on the artery being treated: causing structural damage, introducing foreign bodies and altering local hemodynamics. These three effects trigger and affect four interacting biological processes that can lead to restenosis of the stent.

The most typical vascular stent is a net-shaped tubular structure formed by metal microtubules, when in use, under the monitoring of medical imaging equipment, the stent is sent to a lesion site through an artery by using medical instruments such as a puncture needle, a catheter and the like, and then the stent is expanded to prop open the lesion artery, so that the treatment purpose is achieved. The swirling flow can generate enhanced wall shear force, so that the blood flow speed near the wall surface is improved, the oscillation shear force index is greatly reduced, the low wall surface shear force is thoroughly eliminated, and meanwhile, the transportation of oxygen between the blood vessel wall and blood can be influenced. How to improve the swirling flow of the intravascular blood during the flowing process is a key to improving the performance of the arterial stent.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides an arterial vessel stent; the arterial stent realizes the flow state transformation of blood flow while having the function of supporting blood vessels by the existing stent, and leads the swirling flow with more clear advantages into the human body.

In order to achieve the above purpose, the present invention is realized by the following technical scheme.

An arterial vessel stent is a reticular cylindrical structure formed by coiling a primary framework and a secondary framework; the primary framework is formed by a plurality of first filar spirals 360 degrees; the secondary framework is formed by a plurality of second filar spirals of 720 degrees; the wire diameter of the first filament is larger than that of the second filament, and the intersection points of the first filament and the second filament are connected.

Further, the plurality of first filaments are parallel.

Still further, the plurality of second filaments are parallel.

Further, the first filaments and the second filaments are both wires.

Further, the first filaments have a wire diameter of 0.5mm; the second filaments have a wire diameter of 0.3mm.

Further, the diameter of the reticular cylindrical structure is less than or equal to 10.5mm.

Further, the number of the first filaments and the number of the second filaments are 6.

Compared with the prior art, the invention has the following beneficial effects:

the invention relates to a bracket formed by adopting a primary framework and a secondary framework in a coiling way, wherein the primary framework has the function of changing the flow state of blood flow when the blood flow flows through the bracket; the secondary framework has the function of enhancing the strength of the rotating flow on the basis of connecting the primary framework.

The vascular stent of the invention leads the flow state of the rotating flow into the human body after the flow state is formed by the stent, and the blood flow of the flow state can sweep the swirling area, the separation area and the blood flow disturbance area, so that the blood flow is more stable; improving wall shear force, and assisting in treating vascular diseases such as atherosclerosis, intimal hyperplasia, thrombus adhesion and the like; blood perfusion to the blood vessel of the branch can be increased; improving the transfer of substances between the influencing blood and the vessel wall.

Drawings

Fig. 1 is a schematic structural view of an arterial stent according to the present invention.

In the figure, 1 is a first filament and 2 is a second filament.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.

Referring to fig. 1, the present embodiment proposes an arterial stent, which is a reticular cylindrical structure formed by coiling a primary framework and a secondary framework; the primary framework is formed by 360 degrees of six first filars 1 spirals; the secondary framework is formed by spiral 720 degrees of six second filaments 2; the wire diameter of the first filament 1 is larger than the wire diameter of the second filament 2, and the intersection point of the first filament 1 and the second filament 2 is connected.

Specifically, six first filaments 1 are parallel to each other and six second filaments 2 are parallel to each other. The six first filaments 1 and the six second filaments 2 form a grid-like structure.

The first filaments 1 and the second filaments 2 are wires of the same material. The wire diameter of the first filament 1 is 0.5mm; the wire diameter of the second filaments 2 was 0.3mm. The diameter of the formed reticular cylinder structure is not more than 10.5mm at maximum.

While the invention has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art to which the invention pertains without departing from the scope of the invention defined by the appended claims.

Claims

1. An arterial vessel stent is characterized by being a reticular cylindrical structure formed by coiling a primary framework and a secondary framework; the primary framework is formed by a plurality of first filaments (1) which are spirally 360 degrees; the secondary framework is formed by a plurality of second filaments (2) which are spirally 720 degrees; the wire diameter of the first thread (1) is larger than that of the second thread (2), and the intersection points of the first thread (1) and the second thread (2) are connected; the plurality of first filaments (1) being parallel; the plurality of second filaments (2) being parallel; the start point of the spiral structure of the first filar (1) and the start point of the spiral structure of the second filar (2) are on one end face of the mesh cylinder structure, and the end point of the spiral structure of the first filar (1) and the end point of the spiral structure of the second filar (2) are on the other end face of the mesh cylinder structure; the spiral pipe diameter of the reticular cylindrical structure is consistent throughout.

2. An arterial vascular stent as claimed in claim 1, characterised in that the first and second filaments (1, 2) are both wires.

3. An arterial stent as claimed in claim 1, characterised in that the first wire (1) has a wire diameter of 0.5mm; the second filaments (2) have a wire diameter of 0.3mm.

4. An arterial stent as claimed in claim 1, wherein the mesh cylindrical structure has a diameter of 10.5mm or less.

5. An arterial vascular stent as claimed in claim 1, characterised in that the first and second filaments (1, 2) are each 6.