Laser heated cautery cap with transparent substrate
US4994060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Mar 20, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/3614
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A laser heated cautery cap assembly includes a catheter assembly adapted to be introduced into a lumen, such as an arterial opening. The catheter assembly includes at least one optical fiber connected to a laser light source adapted to produce short output bursts. A cautery cap at the catheter distal end includes a transparent substrate member disposed to receive the laser energy from the optical fiber(s). The substrate member preferably is formed of a crystalline solid having a smooth, curved outer surface, with a central guidewire bore extending therethrough. One end of the bore is provided with a tapering counterbore, and the opposite end of the substrate member is an input surface disposed to receive laser energy from the optical fiber. A nose piece includes a central guidewire bore coaxial with the substrate member bore, the nose piece including a tapered proximal end dimensioned to fit within the counterbore of the substrate. The substrate counterbore and bore surfaces, and major portions of the curved outer surface are coated with a highly reflective material, and another portion of the outer surface is coated with a material which absorbs the laser energy and is heated ther…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.