Patent
Ultrasonic device for cutting and coagulating with stepped output
James R. Giordano,Robert J. Beetel,Eitan T. Wiener,Jeffrey D. Messerly,Brian F Dinardo,Daniel J. Abbott +5 more
TLDR
In this article, a generator coupled to an ultrasonic transducer is used to generate a first ultrasonic drive signal for a first period, followed by a second drive signal subsequent to the first period.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.read more
Citations
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Patent
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TL;DR: In this paper, a surgical instrument can comprise a channel configured to support a staple cartridge and, in addition, an anvil pivotable between open and closed positions relative to the channel.
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Patent
Powered surgical instrument
Michael Zemlok,David C. Racenet +1 more
TL;DR: In this paper, a handle assembly, a first endoscopic portion, a motor, and a first effector are described, and the first end effector is configured to perform a first stapling function.
References
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Fundamentals of Heat and Mass Transfer
TL;DR: This paper introduced the physical effects underlying heat and mass transfer phenomena and developed methodologies for solving a variety of real-world problems, such as energy minimization, mass transfer, and energy maximization.
Patent
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Vessel sealer and divider
TL;DR: An endoscopic bipolar forceps as mentioned in this paper includes an elongated shaft having opposing jaw members at a distal end thereof, which are movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to each another to a second position wherein jaw members cooperate to grasp tissue therebetween.