Determining the state of an ultrasonic end effector
US11317937B2 · kind B2 · utility
46Cited by
1,507References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2018 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Jan 31, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2505/05
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Various systems and methods for determining the state of an end effector of an ultrasonic surgical instrument are disclosed. A control circuit can be configured to measure a complex impedance of an ultrasonic electromechanical system including an ultrasonic blade and compare the measured complex impedance to reference complex impedance patterns that each correspond to a state of the end effector. Accordingly, the control circuit can further be configured to determine the state of the end effector according to which of the plurality of reference complex impedance patterns the measured complex impedance corresponds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.