System and method to protect against insulation breach in an electrosurgical instrument
US11701165B2 · kind B2 · utility
0Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2018 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Sep 24, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/167
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus is provided to detect electrical contact between anatomical tissue and a shield conductor: a transformer; an alternating current (AC) reference frequency signal generator to inject a reference frequency signal to a primary winding of the transformer; a reactive impedance coupled in parallel with a secondary winding of the transformer between a first node and a second node; and a phase match detector circuit to detect a phase match between the reference frequency signal and a reflected reference frequency signal that is reflected from the secondary winding to the primary winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.