Monitoring circuit for an RF surgical apparatus
US4862889A · kind A · utility
188Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1989 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jan 19, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/908
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An RF surgical apparatus has an RF power stage, a control circuit for driving the power stage, and an adjustable element for setting a rated value of the output power. To monitor the RF surgical apparatus for the occurrence of an apparatus-caused malfunction, a power measuring unit measures the actual value of the RF power at the output of the RF power stage. Deviations of the actual value from a rated value are monitored. An alarm is generated if the deviation exceeds a selected value. An alarm can be simulated in a test mode by means of an auxiliary circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.