Ultrasonic device for cutting and coagulating with stepped output

US8253303B2 · 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: Nov 11, 2011
• Grant date: Aug 28, 2012
• Expiry date: Nov 11, 2031

Classification

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

Abstract

An apparatus, system, and method for driving an end effector in a surgical instrument are disclosed. The method comprises generating a first ultrasonic drive signal by a generator, 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 second drive signal are different over the 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 to couple to an ultrasonic instrument. The system comprises a generator coupled to an ultrasonic instrument comprising an ultrasonic drive system comprising an ultrasonic transducer coupled to a waveguide and an end effector. The ultrasonic drive system resonates at a resonate frequency.