Avoiding stress-induced martensitic transformation in nickel titanium alloys used in medical devices
US8425588B2 · kind B2 · utility
16Cited by
43References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 2011 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Jan 12, 2031 |
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.