Temperature control of ultrasonic end effector and control system therefor

US11571234B2 · kind B2 · utility

Assignee

• Cilag GmbH International · CH

Inventors

• Cameron R. Nott · Loveland, US
• Fergus P. Quigley · Seattle, US
• Amrita S. Sawhney · Cincinnati, US
• Stephen M. Leuck · Milford, US
• Brian D. Black · Loveland, US
• Eric M. Roberson · Lebanon, US
• Patrick J. Scoggins · Loveland, US
• Craig N. Faller · Batavia, US
• Madeleine C. Jayme · Cincinnati, US
• Jacob S. Gee · Cincinnati, US
• Frederick E. Shelton, IV · Hillsboro, US
• David C. Yates · Morrow, US

Key dates

• Filing date: Aug 28, 2018
• Grant date: Feb 7, 2023
• Expiry date: Jun 2, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2217/007
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A generator, ultrasonic device, and method of determining a temperature of an ultrasonic blade are disclosed. A control circuit coupled to a memory determines an actual resonant frequency of an ultrasonic electromechanical system comprising an ultrasonic transducer coupled to an ultrasonic blade by an ultrasonic waveguide. The actual resonant frequency is correlated to an actual temperature of the ultrasonic blade. The control circuit retrieves from the memory a reference resonant frequency of the ultrasonic electromechanical system. The reference resonant frequency is correlated to a reference temperature of the ultrasonic blade. The control circuit then infers the temperature of the ultrasonic blade based on the difference between the actual resonant frequency and the reference resonant frequency.