Thermal angioplasty system
US5498261A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/50
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for thermal angioplasty provides electrical power to a heating coil located inside a dilatation balloon, receives a signal from a sensor at the coil indicating its temperature and also receives signals from balloon sensors indicating the temperature at their respective positions. An isolation transformer is used to provide RF power and the sensor signals are optically coupled to provide increased electrical isolation for the patient. The heating coil temperature sensor signal is compared to high and low temperature limits and if either is exceeded, a fault signal is generated. The sensor signals from the balloon are compared to predetermined high temperature limits and if exceeded, fault signals are generated. The current drawn from the battery is compared to a predetermined current level and if exceeded, a fault signal is also generated. Upon generation of any of the fault signals, the electrical power to the heating coil is interrupted by fault detection circuitry. An RF ON reset switch is provided to prevent the inadvertent application of RF power to the heating coil. Materials used in the connectors and in the RF generator for connections to the catheter electrical lea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.