Avoiding stress-induced martensitic transformation in nickel titanium alloys used in medical devices
US7175655B1 · kind B1 · utility
121Cited by
40References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 17, 2001 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Sep 17, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2210/0023
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A process for assembling a medical device made from a nickel-titanium alloy for use in a mammalian body while avoiding the formation of stress-induced martensite and a medical device used in combination with a delivery system for deployment into the mammalian body are disclosed. By heating the nickel-titanium alloy of the medical device to a temperature above Md, and deforming and installing the device into a delivery system or holding capsule, it is possible to avoid the formation of stress-induced martensite in the stent, which stays in the austenitic phase throughout.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.