System and method for augmented impedance sensing
US8624606B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 2011 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Apr 5, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/1286
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An impedance monitoring circuit for an electrosurgical generator. The monitoring circuit includes an isolation transformer coupled to an active terminal and a return terminal of an electrosurgical generator. The isolation transformer includes a primary winding coupled to a reference resistor and a secondary winding coupled to a load. A driver transmits a sensor signal to the reference resistor and the load. A primary converter coupled to the reference resistor and the load detects a primary converted signal as a function of the sensor signal passing through the reference resistor and the load. A secondary converter coupled to the driver detects a secondary converted signal as a function of the sensor signal prior to passing through the reference resistor and the load. A controller determines a fault condition based on the primary and secondary converted signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.