Methods for estimating and controlling state of ultrasonic end effector
US11464532B2 · kind B2 · utility
Assignee
Inventors
- Cameron R. Nott
- Foster B. Stulen
- Fergus P. Quigley
- John E. Brady
- Gregory A. Trees
- Amrita S. Sawhney
- Patrick J. Scoggins
- Kristen G. Denzinger
- Craig N. Faller
- Madeleine C. Jayme
- Alexander R. Cuti
- Matthew S. Schneider
- Chad P. Boudreaux
- Brian D. Black
- Maxwell T. Rockman
- Gregory D. Bishop
- Eric M. Roberson
- Stephen M. Leuck
- James M. Wilson
Key dates
| Filing date | Sep 27, 2018 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | May 18, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2218/008
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Various aspects of a generator, ultrasonic device, and method for estimating and controlling a state of an end effector of an ultrasonic device are disclosed. The ultrasonic device includes an electromechanical ultrasonic system defined by a predetermined resonant frequency, including an ultrasonic transducer coupled to an ultrasonic blade. A control circuit measures a complex impedance of an ultrasonic transducer, wherein the complex impedance is defined as The control circuit receives a complex impedance measurement data point and compares the complex impedance measurement data point to a data point in a reference complex impedance characteristic pattern. The control circuit then classifies the complex impedance measurement data point based on a result of the comparison analysis and assigns a state or condition of the end effector based on the result of the comparison analysis. The control circuit estimates the state of the end effector of the ultrasonic device and controls the state of the end effector of the ultrasonic device based on the estimated state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.