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Absorbable metallic appliance

A device and metal technology, applied in the field of absorbable metal devices, can solve problems such as adverse effects, and achieve the effect of fast circumferential deconstruction

Active Publication Date: 2021-07-16
BIOTYX MEDICAL SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, when the vascular stent remains in the blood vessel for a long time, the position where the vascular stent is located will become a new stenosis, which will have adverse effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] A bracket, the matrix material of which is an iron-based alloy with a carbon content not higher than 2.11wt.%. The matrix includes a plurality of wave-shaped ring structures arranged in the axial direction. through holes. A plurality of through holes are spaced along the length direction of the support rod and distributed in a row. Moreover, the multiple through holes on the axially opposite supporting rods of different wave-shaped ring structures are respectively connected to form multiple straight lines in the axial direction. The distance between two adjacent through holes on each support rod is 20 microns. The ratio of the diameter of any one of the through holes along the width direction of the support rod to the width of the support rod is 57%. The shape of the through hole is triangular-like. The shortest distance between the edge of the via hole and the edge of the support rod is 25 μm. The hollow rate of each support rod is 20%. In the nominal expanded sta...

Embodiment 2

[0116] A bracket, the matrix material of which is an iron-based alloy with a carbon content not higher than 2.11wt.%. The matrix includes a plurality of wave-shaped ring structures arranged in the axial direction. through holes. A plurality of through holes are spaced along the length direction of the support rod and distributed in a row. Moreover, the multiple through holes on the axially opposite supporting rods of different wave-shaped ring structures are respectively connected to form multiple straight lines in the axial direction. The shortest distance between two adjacent through holes on each support rod is 25 microns. The ratio of the diameter of any one of the through holes along the width direction of the support rod to the width of the support rod is 47%. The shape of the through hole is circular. The distance between the edge of the via hole and the edge of the support rod is 35 μm. The hollow rate of each support rod is 20%. In the nominal expanded state, the...

Embodiment 3

[0119] A bracket, the matrix material of which is an iron-based alloy with a carbon content not higher than 2.11wt.%, the matrix includes a plurality of corrugated ring structures arranged in the axial direction, and half of the support rods of the corrugated ring structures are respectively provided with a plurality of through hole. A plurality of through holes are spaced along the length direction of the support rod and distributed in a row. Moreover, the multiple through holes on the axially opposite supporting rods of different wave-shaped ring structures are respectively connected to form multiple straight lines in the axial direction. The shortest distance between two adjacent through holes on each support rod is 30 microns. The ratio of the diameter of any one of the through holes along the width direction of the support rod to the width of the support rod is 52%. The shape of the through hole is circular. The distance between the edge of the through hole and the edg...

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Abstract

The invention relates to an absorbable metallic appliance. The absorbable metallic appliance comprises an absorbable metallic matrix, a corrosion inhibiting layer arranged on the absorbable metallic matrix and a corrosion promoting layer covering the corrosion inhibiting layer, wherein a plurality of through holes are formed in partial regions of the absorbable metallic matrix, and the thickness of parts, located at the through holes, of the corrosion inhibiting layer is smaller than that of other parts of the corrosion inhibiting layer; and / or the thickness of parts, located at the through holes, of the corrosion promoting layer is greater than that of other parts of the corrosion promoting layer. The absorbable metallic appliance can be decomposed relatively quickly.

Description

technical field [0001] The invention relates to the field of implantable medical devices, in particular to an absorbable metal device. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] Currently, in the field of absorbable implantable devices, the most widely used materials include degradable polymers, magnesium-based alloys, and iron-based alloys. Among the degradable polymers, polylactic acid is the most widely used. Its advantage is that it can be completely degraded and absorbed by the body, and its degradation products are carbon dioxide and water, which is friendly to the human body. The disadvantage is that compared with metal-based devices, the mechanical properties of degradable polymer-based devices are insufficient. To achieve the same mechanical properties as metal-based devices, the size of degradable polymer-based devices needs to be larger than metal-bas...

Claims

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Application Information

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IPC IPC(8): A61F2/915
CPCA61F2/915A61F2002/91575A61F2210/0004A61F2240/001
Inventor 林文娇曹瀚文
Owner BIOTYX MEDICAL SHENZHEN CO LTD