Microcoil vaso-occlusive device with multi-axis secondary configuration
US7029486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2002 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Feb 2, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/00867
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A microcoil vaso-occlusive device has a minimum energy state secondary configuration having a plurality of curved segments, each defining a discrete axis. The secondary configuration may be a plurality of interconnected closed loops; an array of laterally-alternating open loops; a series of tangential closed loops; or a logarithmic spiral. The device, in its secondary cofiguration, has a dimension that is substantially larger than the largest dimension of the vascular site in which it is to be deployed. Thus, confinement of the device within the site causes it to assume a configuration with a higher energy state than the minimum energy state. Because the secondary configuration is larger (in at least one dimension) than the site, the device is constrained, by contact with the walls of the site, from returning to its secondary configuration, and shifting of the device due to blood flow is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.