Endovenous closure of varicose veins with mid infrared laser
US7524316B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2004 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Apr 18, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/036
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This invention is an improved method and device for treating varicose veins 200 or the greater saphenous vein 202. The method comprises the use of infrared laser radiation in the region of 1.2 to 2.2 um in a manner from inside the vessel 200 or 202 such that the endothelial cells of the vessel wall 704 are damaged and collagen fibers in the vessel wall 704 are heated to the point where they permanently contract, the vessel 200 or 202 is occluded and ultimately resorbed. The device includes a laser 102 delivered via a fiber optic catheter 300 that may have frosted or diffusing fiber tips 308, or that may be provided with a protective spacer. A motorized pull back device 104 may be used, and a thermal sensor 600 may be used to help control the power required to maintain the proper treatment temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.