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Degradable magnesium alloy stent

A magnesium alloy stent and support ring technology, which is applied in the field of medical devices, can solve problems such as stress concentration, and achieve the effects of strengthening the structural strength, reducing the degree of damage, and increasing the deformation margin

Pending Publication Date: 2022-01-04
SHANGHAI KINDLY MEDICAL INSTR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the magnesium alloy stent in the prior art is prone to stress concentration, thereby providing a magnesium alloy stent capable of reducing stress concentration

Method used

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  • Degradable magnesium alloy stent
  • Degradable magnesium alloy stent
  • Degradable magnesium alloy stent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The degradable magnesium alloy bracket provided in this embodiment includes: a plurality of body support ring 1 and a connecting body 2.

[0041] like figure 1 , figure 2 As shown, the main body support ring 1 in the undefined state is a ring structure, and is configured by a plurality of first main body units 9, and the main body support ring 1 has a plurality of peak sections 3 and a waveguide section 4, the peak section. 3 Connect with the trough section 4; a plurality of the main body support ring 1 is connected to a tubular degradable magnesium alloy bracket through the connecting body 2 transition to a tubular shape, and between the adjacent two main body support ring 1 is Mirror symmetry, that is, the peaks of the two adjacent the body support ring 1 are opposed to the peak; the connecting body 2 is a straight line or curved structure suitable for bending, and both ends of the connecting body 2 are supported with the body support. The transition section 7 of the ring...

Embodiment 2

[0045] The degradable magnesium alloy bracket provided in this example is similar to Example 1, and the difference is that Figure 5 ,Image 6 Design, the main body support ring 1 is configured by the first main body unit 9 and the second body unit 10, so that the peak peak section 3 exhibits two structures, one is a structure having a curved vertex, and another one The structure having two curved vertices, the peak segment 3 of the above two structures alternately set.

[0046] like Figure 7 As shown, the second main body unit 10 includes: an arc-shaped vertex structure 6, a transition section 7, and a semi-arc section 8; the arc-shaped vertex structure 6 is located at the intermediate position of the second main body unit 10, and The peak section 3 constituting the main body support ring 1, the cross-sectional width of the peak section 3 is greater than the average cross-section width of the body support ring 1, and the anti-deformation strength of the peak section 3 is increased....

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Abstract

The invention provides a degradable magnesium alloy stent, and belongs to the technical field of medical instruments. The degradable magnesium alloy stent comprises a plurality of main body supporting rings arranged at intervals, each main body supporting ring is of an annular structure, and every two adjacent main body supporting rings are connected through a plurality of connecting bodies; the main body supporting ring is formed by sequentially connecting a plurality of wave crest sections and wave trough sections, the wave crest sections and the wave trough sections are connected through transition sections, at least part of the wave crest sections (3) are of a structure with at least two arc-shaped vertexes, and the section width of the wave trough sections is larger than the average section width of the main body supporting ring. The multiple arc-shaped vertex structures of the wave crest sections increase the deformation allowance of the wave crest sections; the section widening design of the trough section improves the structural strength of the trough section; in the radial expansion process, stress and deformation can be dispersed and concentrated through the arc-shaped vertex structure and the section widening design, the degradation rate difference among the wave crest section, the wave trough section and the transition section is reduced, and the failure of the whole stent caused by the fact that the wave crest section and the wave trough section are degraded before the transition section is avoided.

Description

Technical field [0001] The present invention relates to the field of medical devices, and more particularly to degradable magnesium alloy brackets. Background technique [0002] With the development of modern medical technology and the increasing medical equipment, the coronary stent implantation has gradually become a major means of intervention cardiovascular therapy. The magnesium alloy bracket can not only provide high support strength of the metal bracket, but also by human body after 6 to 12 months, thereby avoiding the long-term foreign body stimulation to the blood vessel wall, reducing the revision rate of blood vessels, showing huge advantages and potential. [0003] The bracket in the closed state is placed on the balloon on the distal end of the balloon catheter, along the guide wire inserted in advance in the artery, transported to the vessel or narrow portion; expand the balloon catheter, so that the balloon is driven The stent expansion, the expanded bracket suppor...

Claims

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Application Information

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IPC IPC(8): A61F2/82A61F2/958
CPCA61F2/82A61F2/958A61F2310/00041A61F2250/0098
Inventor 周文选吕轲左伟尚磊李涛林森梁栋科
Owner SHANGHAI KINDLY MEDICAL INSTR CO LTD