Microwave aided balloon angioplasty with lumen measurement
US5129396A · kind A · utility
Inventors
Key dates
| Filing date | Sep 18, 1990 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Sep 18, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/104
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A multipurpose catheter apparatus for microwave aided balloon angioplasty includes a balloon capable of being filled with a lossy dielectric liquid, and bearing a metallization pattern. The catheter includes an electromagnetic transmission line. Radio frequency energy applied to the proximal end of the electromagnetic transmission line is radiated by an antenna within the balloon. The metallization pattern causes a portion of the energy applied to the proximal end of the transmission line to be reflected, which affects a characteristic such as impedance, return loss or time of reflection. A measurement apparatus measures the characteristic, and the distention of the balloon is determined from the measured characteristic. A guide filament may extend through the transmission line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.