Method and system for model-based temperature estimation of an ultrasonic instrument
US12369938B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2022 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Feb 17, 2044 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/065
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method performed by a surgical system that includes an ultrasonic instrument with an end effector. The method determines a change in resonance frequency of the end effector while the ultrasonic instrument is either in 1) a high-power state in which the ultrasonic instrument draws a first current to cause the end effector to produce heat or 2) a low-power state in which the ultrasonic instrument draws a second current, which is less than the first current that does not cause the end effector to produce heat. The method determines a temperature of the end effector by applying the change in resonance frequency to a hysteresis model that includes a hysteretic relationship between changes in resonance frequency of the end effector and corresponding temperatures of the end effector, and outputs a notification based on the temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.