Control device for surgical instrument, and surgical system
US11051879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2018 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Nov 3, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2018/00875
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A control device controls a surgical instrument including a heater. The control device includes a first power supply, a second power supply, a resistance value calculation section, and an output control circuit. The first power supply outputs a first current having a first frequency and supplied to the heater. The second power supply outputs a second current combined with the first current, supplied to the heater and having a second frequency different from the first frequency. The resistance value calculation section separates a signal component related to the second current from the first and second currents having passed through the heater, and calculates a heater resistance value based on the signal component. The output control circuit controls a temperature of the heater based on the heater resistance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.