Ultrasonic device for cutting and coagulating with stepped output

US8058771B2 · kind B2 · utility

Assignee

• Ethicon Endo-Surgery, Inc. · US

Inventors

• James R. Giordano · Milford, US
• Robert J. Beetel · Sunnyvale, US
• Eitan T. Wiener · Cincinnati, US
• Jeffrey D. Messerly · Cincinnati, US
• Brian F. DiNardo · Cincinnati, US
• Daniel J. Abbott · Loveland, US

Key dates

• Filing date: Jul 15, 2009
• Grant date: Nov 15, 2011
• Expiry date: Nov 22, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B06B2201/76
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Various embodiments are directed to an apparatus, system, and method for driving an end effector coupled to an ultrasonic transducer in a surgical instrument. The method comprises generating a first ultrasonic drive signal by a generator coupled to an ultrasonic drive system, actuating the ultrasonic transducer with the first ultrasonic drive signal for a first period, generating a second ultrasonic drive signal by the generator, and actuating the ultrasonic transducer with the second ultrasonic drive signal for a second period, subsequent to the first period. The first drive signal is different from the second drive signal over the respective first and second periods. The first and second drive signals define a step function waveform over the first and second periods. The apparatus comprises a generator configured to couple to an ultrasonic instrument. The system comprises a generator coupled to an ultrasonic instrument. The ultrasonic instrument comprises an ultrasonic drive system comprising an ultrasonic transducer coupled to a waveguide and an end effector coupled to the waveguide, and wherein the ultrasonic drive system is configured to resonate at a resonant frequency.