Estimating state of ultrasonic end effector and control system therefor

US11464559B2 · kind B2 · utility

Assignee

• Cilag GmbH International · CH

Inventors

• Cameron R. Nott · Loveland, US
• Foster B. Stulen · Mason, US
• Fergus P. Quigley · Seattle, US
• John E. Brady · Cincinnati, US
• Gregory A. Trees · Loveland, US
• Amrita S. Sawhney · Cincinnati, US
• Rafael J. Ruiz Ortiz · Mason, US
• Patrick J. Scoggins · Loveland, US
• Kristen G. Denzinger · Cincinnati, US
• Craig N. Faller · Batavia, US
• Madeleine C. Jayme · Cincinnati, US
• Alexander R. Cuti · Cincinnati, US
• Matthew S. Schneider · Blue Ash, US
• Brian D. Black · Loveland, US
• Maxwell T. Rockman · Cincinnati, US
• Gregory D. Bishop · McLeansboro, US
• Frederick E. Shelton, IV · Hillsboro, US
• David C. Yates · Morrow, US

Key dates

• Filing date: Aug 28, 2018
• Grant date: Oct 11, 2022
• Expiry date: Jan 12, 2040

Classification

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

Abstract

Various aspects of a generator, ultrasonic device, and method for estimating 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.