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Human body absorbable blood vessel support and its manufacturing method

A vascular stent and a manufacturing method technology, applied in the field of medical devices, can solve the problems that the stent cannot be used, the elongation rate of the ferroalloy is not high enough, etc., and achieve the effects of shortening the absorption period, accelerating the absorption speed, and improving the flexural strength

Active Publication Date: 2009-10-07
BIOTYX MEDICAL (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the elongation of the ferroalloy treated in this way is still not high enough to meet the use requirements of the bracket.

Method used

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  • Human body absorbable blood vessel support and its manufacturing method
  • Human body absorbable blood vessel support and its manufacturing method
  • Human body absorbable blood vessel support and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0053] The pure iron pipe (outer diameter 2.8mm, wall thickness 0.2mm) that meets the requirements of GB / T9971-2004 is laser cut into a hollow tubular structure according to the preset pattern. The cut stent was ultrasonically cleaned with water for 10 minutes, followed by ultrasonic cleaning with absolute ethanol for 10 minutes, and then ultrasonic cleaning with acidic solution for 2 minutes. The cleaned stent was clamped on an electrochemical polishing device, and polished in an iron polishing solution for 2 minutes at a polishing voltage of 16 volts. Reverse the orientation of the stent at regular intervals during electrochemical polishing.

[0054] The pre-polished stent was ionized with N. After cleaning the pure iron bracket, put it into the cathode disk of the glow ion furnace and make full contact with the temperature measuring workpiece, and close the vacuum chamber. Start the vacuum pump to evacuate to below 6 Pa, turn on the bias power supply, and adjust the volta...

specific Embodiment 2

[0058] The pure iron pipe (outer diameter 2.8mm, wall thickness 0.2mm) that meets the requirements of GB / T9971-2004 is laser cut into a hollow tubular structure according to the preset pattern. The cut stent was ultrasonically cleaned with water for 10 minutes, followed by ultrasonic cleaning with absolute ethanol for 10 minutes, and then ultrasonic cleaning with acidic solution for 2 minutes. The cleaned stent was clamped on an electrochemical polishing device, and polished in an iron polishing solution for 2 minutes at a polishing voltage of 16 volts. Reverse the orientation of the stent at regular intervals during electrochemical polishing.

[0059] The pre-polished support is ionized: clean the pure iron support and put it on the cathode plate of the glow ion furnace to completely contact the temperature measuring workpiece, and close the vacuum chamber. Start the vacuum pump to evacuate to below 6 Pa, turn on the bias power supply, and adjust the voltage to 450V to gener...

specific Embodiment 3

[0063] The pure iron pipe (outer diameter 2.8mm, wall thickness 0.2mm) that meets the requirements of GB / T9971-2004 is laser cut into a hollow tubular structure according to the preset pattern. The cut stent was ultrasonically cleaned with water for 10 minutes, followed by ultrasonic cleaning with absolute ethanol for 10 minutes, and then ultrasonic cleaning with acidic solution for 2 minutes. The cleaned stent was clamped on an electrochemical polishing device, and polished in an iron polishing solution for 2 minutes at a polishing voltage of 16 volts. Reverse the orientation of the stent at regular intervals during electrochemical polishing.

[0064] Ion infiltration C+N on the pre-polished support: clean the pure iron support and put it into the cathode disk of the glow ion furnace to make full contact with the temperature measuring workpiece, and close the vacuum chamber. Start the vacuum pump to evacuate to below 6 Pa, turn on the bias power supply, and adjust the voltag...

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Abstract

The present invention provides a method for manufacturing human body absorbable blood vessel support, including the following steps: (1) support forming; (2) cleaning and pre-polishing the support; (3) performing surface alloying treatment to the support; (4) performing fine finish to the support after surface treatment. The invention also provides a human body absorbable blood vessel support, theinvention adopts a surface alloying technique so that the support has a compound diffusion layer with adjustable penetration depth, thereby improving the support intensity and simultaneously quickening the corrosion speed of the support and shortening the support absorption cycle. The yield strength and elongation rate can be modulated in a prodigious scope by controlling the distribution, shapeand depth of the composite diffusion layer, to reach the intensity and absorption cycle required by the support.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a blood vessel stent absorbable by a human body and a manufacturing method thereof. Background technique [0002] Coronary atherosclerotic heart disease is one of the important causes of human death. Percutaneous transluminal coronary angioplasty is the main method for the treatment of coronary atherosclerotic heart disease. Interventional therapy for coronary heart disease began in 1977. After nearly 30 years of continuous development and improvement, equipment and technology have been continuously improved and improved. This technique has small trauma, quick effect, extremely low mortality and complication rate, and is well received by patients. Interventional therapy is now gradually becoming a new discipline after internal medicine and surgery. [0003] From the initial stage of balloon dilation therapy to the stage of implantation of bare metal stents, to the wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/04A61L27/58A61L27/28A61L27/54C23C8/22C23C8/26C23C8/30C23C8/38A61F2/82
Inventor 张德元曾卫军
Owner BIOTYX MEDICAL (SHENZHEN) CO LTD
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