System and method for control of tissue welding
US6733498B2 · kind B2 · utility
682Cited by
23References
36Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 19, 2002 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Feb 19, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/00886
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method for welding of biological tissue by applying an RF voltage during a first stage to electrodes of a tissue welding tool; monitoring tissue impedance, and determining a minimum tissue impedance value during the first stage; determining relative tissue impedance; detecting when the relative tissue impedance reaches a predetermined relative tissue impedance value and starting a second stage; calculating the duration of the second stage as a function of the duration of the first stage; and applying the RF voltage during the second stage to the electrodes of the tissue welding tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.