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Coronary artery fistula covered stent and conveying system

A technology of covered stents and coronary arteries, which is applied to stents, devices with human tubular structures, blood vessels, etc., can solve the problems of many coils, high cost, and not easy to completely block, and achieve small ports, reduce costs, and prevent The effect of stent displacement

Pending Publication Date: 2021-11-09
THE FIRST AFFILIATED HOSPITAL OF SHANTOU UNIV MEDICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is not easy to achieve complete blockage, and requires many spring coils and high cost

Method used

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  • Coronary artery fistula covered stent and conveying system
  • Coronary artery fistula covered stent and conveying system
  • Coronary artery fistula covered stent and conveying system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] refer to figure 1 As shown, a coronary artery fistula covered stent 1 includes a main body covering 2 and a bare metal stent 3, the main body covering 2 is arranged on the bare metal stent 3, the bare metal stent 3 has a cylindrical structure, and the bare metal stent 3 includes A plurality of metal rings 33 are arranged at intervals along the axial direction, and a reinforcing rod 34 is arranged between any two adjacent metal rings 33 .

[0027] The main body coating 2 includes a first coating 21 and a second coating 22, the first coating 21 has a cylindrical structure, the second coating 22 has a funnel-shaped structure, and the gap between the first coating 21 and the second coating 22 is Integral molding makes a bullet-shaped structure between the first and second coatings 21 and 22. The second coating port of the funnel-shaped structure is small and can only pass through the wire guide tube, thereby easily retaining platelets, cellulose and blood coagulation substa...

Embodiment 2

[0034] refer to Figure 6 As shown, a coronary artery fistula covered stent includes a main body covering 2 and a bare metal stent 3, the main body covering 2 is arranged on the bare metal stent 3, and the bare metal stent 3 includes a first stent end 35, a second stent end 36. The first stent end 35 has a circular structure, the diameter of the second stent end 36 gradually decreases to form a funnel-shaped structure, the bare metal stent 3 has a bullet-shaped structure as a whole, and the bare metal stent 3 has a coated section 31 and a bare stent section 32 The main body coating 2 is in the shape of a bullet matching the outer contour of the bare metal stent 3, including a first coating 21 and a second coating 22, the first coating 21 is in a cylindrical structure, and the second coating 22 is a funnel Shaped structure, the first coating 21 and the second coating 22 are integrally formed, the second coating 22 has a stent segment 23 and a bare coating segment 24; the first ...

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Abstract

The invention discloses a coronary artery fistula covered stent. The coronary artery fistula covered stent comprises a main body covering film and a metal bare stent, wherein the main body covering film is arranged on the metal bare stent; the metal bare stent is of a cylindrical structure; the main body covering film comprises a first covering film and a second covering film; the first covering film is of a cylindrical structure; the second covering film is of a funnel-shaped structure; the first covering film and the second covering film are integrally molded, so that a bullet-shaped structure is formed between the first covering film and the second covering film; the metal bare stent is provided with a covering film section and a bare stent section; and the first covering film tightly covers the covering film section of the metal bare stent, so that the metal bare stent forms the bullet-shaped coronary artery fistula covered stent. The coronary artery fistula covered stent is simple to operate, accurate to position, low in price, safe and reliable, and rapid blocking of coronary artery fistula is realized.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a coronary artery fistula covered stent and a delivery system. Background technique [0002] Coronary artery fistulae (CAF) is a rare type of congenital vascular malformation, accounting for 0.27%-0.4% of congenital heart disease. Arterial blood is shunted to communicating cardiac chambers or great vessels through communicating branches (fistulas). When the blood shunt flow of coronary artery fistula is large, the coronary perfusion pressure will drop rapidly, affecting the local myocardial blood supply, leading to myocardial ischemia, angina pectoris and even myocardial necrosis. Long-term shunting of coronary artery fistula can also cause a decline in cardiac function and eventually heart failure. [0003] Currently, the treatment methods for coronary artery fistula include surgical treatment and medical interventional treatment. Surgical treatment requires thoraco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/07A61F2/95
CPCA61F2/07A61F2/95A61F2002/072
Inventor 王斌李银华陈畅张飞凤
Owner THE FIRST AFFILIATED HOSPITAL OF SHANTOU UNIV MEDICAL COLLEGE
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