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Method, apparatus and solution for electropolishing metallic stents

A metal bracket, electropolishing technology, applied in the field of electropolishing, can solve problems such as fast dissolution

Inactive Publication Date: 2014-03-26
ABBOTT LAB VASCULAR ENTERPRISE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, higher current densities at higher points may cause metal to dissolve faster than those points that are level with the surface

Method used

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  • Method, apparatus and solution for electropolishing metallic stents

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[0052] Four dry identical brackets can be removably attached to the adapters of the four elongated members. When stirring the electropolishing solution (polyethylene glycol (PEG 1000): dimethyl sulfate: ethanol in a weight ratio of about 1:59:44 or in other words about 1 weight percent polyethylene glycol (PEG 1000) , 57 weight percent dimethyl sulfate, 42 weight percent ethanol), the bracket was lowered into the electropolishing solution on the device. The positive lead of the power supply was attached to the device, and the magnetic stirrer inside the electropolishing vessel was turned on to facilitate stirring of the electropolishing solution. When the cycle time has elapsed (depending on the size and type of scaffold), remove the scaffold from the electropolishing solution and submerge it into a container of ethanol. Each support is moved while submerged. The stent is then dipped again into the electropolishing solution to begin another polishing cycle. The polishing cy...

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Abstract

An apparatus and method are described for electropolishing metallic stents. The apparatus may include an electropolishing container made from material of low thermal conductivity. The apparatus may include at least one spiral cathode for optimization of solution agitation and / or voltage distribution in the electrolytic solution. Further, an electrolytic solution is described. A method for improved polishing to consistently produce smooth surfaces is described.

Description

technical field [0001] The present invention relates generally to providing apparatus and methods for electropolishing products made of metal, and more particularly to electropolishing metal medical devices, such as those made of stainless steel, titanium, tungsten, titanium-nickel alloys, tantalum, cobalt-chromium-tungsten, etc. stand. Although the devices and methods described herein are primarily applicable to medical stents, particularly intravascular stents, the present invention is not limited to such medical products. For example, the method can be used to electropolish automotive or aerospace metal parts. Background technique [0002] Stents are generally tubular devices placed in blood vessels or other body lumens to keep the lumen open and, in some cases, to reduce the development of restenosis. Stents can be formed into a variety of generally expandable configurations as they are delivered in a compressed form to the desired location. This configuration can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/16A61L31/00A61F2/91
CPCC25F3/16A61L31/022A61L2400/18A61L31/14
Inventor E.武尔夫
Owner ABBOTT LAB VASCULAR ENTERPRISE