CN214017984U

CN214017984U - Coronary artery stent

Info

Publication number: CN214017984U
Application number: CN202021219091.5U
Authority: CN
Inventors: 包桂珍; 韩青松; 薛昱; 张庆祥; 冯小娟
Original assignee: Inner Mongolia University of Technology
Current assignee: Inner Mongolia University of Technology
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-08-24
Anticipated expiration: 2030-06-28

Abstract

The utility model relates to a coronary artery stent, belonging to the field of medical apparatus and instruments, comprising a plurality of supporting bodies and connecting bodies which are arranged in a staggered way to form a tube net structure; the support body is composed of a plurality of omega-shaped support units which are arranged in the circumferential direction, the connector is divided into an I-shaped rib and a U-shaped rib, the I-shaped rib is in butt joint with the middle part of an outer arc of the U-shaped rib, the I-shaped rib is connected with the central position of the inner side of a large wave peak of the support unit, the U-shaped rib is connected with the central position of the outer side of a small wave peak of the support unit, and the connector is connected with the support body in a three-point manner, so that the structural rigidity of the support is effectively enhanced; the connector is connected between two axially adjacent support bodies at intervals, an open-loop structure is adopted in design, the metal coverage rate is moderate, the compliance performance is good, the expansion performance is reliable, and the mechanical property is good; the joint of the support body and the connector adopts an arc, which is beneficial to reducing stress concentration and prolonging the service life of the bracket.

Description

Coronary artery stent

The technical field is as follows:

the utility model belongs to the technical field of medical instrument, a vascular support for treating coronary artery stenosis disease is related to, specifically is a coronary artery support.

Background art:

people living in modern society have become common clinical diseases due to high living pressure, irregular work and rest, unhealthy diet and the like, and a coronary stent is the most common medical instrument in the heart vessel embolism dredging interventional operation and has the functions of dredging and expanding arterial vessels. The basic working principle of the coronary artery stent is that a compressed stent is sent to a lesion stenosis part in a coronary artery through a special catheter, after the stent reaches a proper position, the catheter is withdrawn to release the stent, and the stent restores the original diameter, so that the blood vessel stenosis part is propped up, and the blood flow is restored to be smooth.

At present, various coronary stents are clinically used, and the structures of the coronary stents are different, so that the radial supporting force and the flexibility are improved, and the expansion performance is improved. However, the design of the existing stent can not achieve the performance indexes at the same time, so that it is necessary to design a coronary stent with good radial support and compliance, excellent expansion performance and good biocompatibility.

The utility model has the following contents:

the invention aims to overcome the defects of the prior art structure, and the coronary artery stent has better radial support and compliance performance, excellent expansion performance and good biocompatibility.

In order to achieve the above object, the main technical solution of the present invention includes:

the utility model provides a coronary artery support, include: a support body and a connector; the adjacent two support bodies are connected by a connector, and the support bodies and the connectors are axially and alternately arranged to form a pipe network structure; the supporting body is composed of a plurality of supporting units, the supporting units are circumferentially arranged to form the supporting body, and the axial lines of the supporting bodies which are axially arranged are overlapped.

Preferably, the supporting unit of the present invention is in an "Ω" shape, which includes a large peak and small peaks at two sides; the connector is divided into an I-shaped rib and a U-shaped rib, the I-shaped rib is in butt joint with the middle part of an arc on the outer side of the U-shaped rib, the I-shaped rib is connected to the center position of the inner side of a large wave peak of the supporting unit, and the U-shaped rib is connected to the center position of the outer side of a small wave peak on two sides of the supporting unit.

Preferably, big crest inboard fillet radius be greater than the inboard fillet radius of both sides wavelet crest, big crest inboard fillet radius be greater than or equal to 0.10 mm.

Preferably, the number of the supporting units in the circumferential direction of the blood vessel stent is 6, and the supporting units are uniformly distributed; the number of the connecting bodies is 3 in the circumferential direction, and the connecting bodies are uniformly distributed; the length of the coronary stent is increased by increasing the axial number of the supporting bodies and the connecting bodies, and the size of the diameter of the stent is changed by adjusting the fillet radius of the large wave crest and the small wave crest of the supporting units.

Preferably, coronary artery support, adopt NiTi alloy, medical 316L stainless steel, CoCr alloy or magnesium alloy tubular product to make, coronary artery support forms through laser sculpture.

The utility model has the advantages that: the coronary artery stent of the utility model is composed of a plurality of omega-shaped supporting units and connecting bodies, and adopts an open loop structure in design, namely, the connecting bodies are connected between two supporting bodies adjacent in the axial direction at intervals, the metal coverage rate is moderate, the compliance performance is good, the expansion performance is reliable, and the coronary artery stent has better mechanical property; the connecting body formed by the I-shaped ribs and the U-shaped ribs is connected with the adjacent supporting bodies to form three-point connection, so that the structural rigidity of the support is effectively enhanced; the joint of the support body and the connector adopts an arc, which is beneficial to reducing stress concentration and prolonging the service life of the bracket.

Description of the drawings:

fig. 1 is a schematic plane development structure diagram of the coronary stent of the present invention.

Fig. 2 is a schematic view of the supporting body structure of the coronary stent of the present invention.

Fig. 3 is an enlarged view of the supporting unit structure of the coronary stent of the present invention.

Fig. 4 is an enlarged view of the connector structure of the coronary stent of the present invention.

Fig. 5 is an enlarged schematic view of a portion a of fig. 1.

The specific implementation mode is as follows:

the invention will be further explained by means of specific embodiments with reference to the attached drawings.

Example (b):

the main structure of the coronary stent described in this embodiment includes: a support body 1 and a connector 5; the adjacent support bodies 1 are connected by a connecting body 5; the support bodies 1 and the connecting bodies 5 are axially and alternately arranged to form a pipe network structure; the support body 1 is composed of a plurality of support units 2, the support bodies 1 are formed by the circumferential arrangement of the plurality of support units 2, and the axes of the plurality of support bodies 1 which are axially arranged are superposed.

The supporting unit 2 is in an omega shape, the supporting unit 2 comprises a large peak 3 and small peaks 4 on two sides, the radius of a fillet on the inner side of the large peak 3 is larger than that of a fillet on the inner side of each small peak 4 on two sides, the radius of a fillet on the inner side of the large peak 3 is larger than or equal to 0.10mm, and the diameter of the support is changed by adjusting the radius of the fillets of the large peak 3 and the small peaks 4.

The connector 5 consists of an I-shaped rib 6 and a U-shaped rib 7, the I-shaped rib 6 is butted at the middle part of the arc of the outer side of the U-shaped rib 7, and the connector 5 is connected with the adjacent support body 1 at three points; the I-shaped ribs 6 are connected to the inner side center positions of the large wave crests 3 of the supporting units 2 on the axially adjacent supporting bodies 1, the U-shaped ribs 7 are connected to the outer side center positions of the small wave crests 4 on the two sides of the supporting units 2, and the connecting bodies 5 are connected between the two axially adjacent supporting bodies 1 at intervals.

The supporting units 2 are 6 in number in the circumferential direction of the blood vessel stent and are uniformly distributed, the connecting bodies 5 are 3 in number in the circumferential direction and are uniformly distributed, and the length of the coronary stent is increased by increasing the axial number of the supporting bodies 1 and the axial number of the connecting bodies 5.

The coronary artery stent is made of NiTi alloy, medical 316L stainless steel, CoCr alloy or magnesium alloy pipe materials and is formed by laser engraving.

The coronary artery stent adopts an open loop structure in design, the connecting bodies 5 are connected between two support bodies 1 which are adjacent in the axial direction at intervals, the metal coverage rate is moderate, the compliance performance is good, the expansion performance is reliable, and the mechanical property is good; the connection between the connector 5 consisting of the I-shaped ribs 6 and the U-shaped ribs 7 and the adjacent support body 1 is changed into three-point connection, so that the structural rigidity of the support is effectively enhanced; the joint of the support body 1 and the connector 5 adopts an arc, which is beneficial to reducing stress concentration and prolonging the service life of the bracket.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A coronary stent characterized by a body structure comprising: a support body (1) and a connector (5); the two adjacent support bodies (1) are connected by a connector (5), and the support bodies (1) and the connectors (5) are axially and alternately arranged to form a pipe network structure; the supporting body (1) is composed of a plurality of supporting units (2), the supporting bodies (1) are formed by the circumferential arrangement of the plurality of supporting units (2), the axial lines of the plurality of supporting bodies (1) which are axially arranged are overlapped, and the supporting units (2) are in an omega shape and comprise large wave crests (3) and small wave crests (4) on two sides; the connecting body (5) is divided into an I-shaped rib (6) and a U-shaped rib (7), the I-shaped rib (6) is connected to the middle part of an outer side circular arc of the U-shaped rib (7) in an abutting mode, the I-shaped rib (6) is connected to the center position of the inner side of a large wave crest (3) of the supporting unit (2), and the U-shaped rib (7) is connected to the center position of the outer side of a small wave crest (4) of the two sides of the supporting unit (2).

2. The coronary stent of claim 1, wherein: the fillet radius of the inner side of the large peak (3) is larger than that of the inner sides of the small peaks (4) at two sides, and the fillet radius of the inner side of the large peak (3) is larger than or equal to 0.10 mm.