Devices and techniques for cutting and coagulating tissue
First Claim
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1. A method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument, the method comprising:
- generating, by a generator, at least one time varying electrical signal having a resonant frequency;
monitoring, by the generator, the resonant frequency of the at least one time varying electrical signal;
comparing, by the generator, the resonant frequency to a threshold frequency; and
triggering, by the generator, a first response of the generator when the resonant frequency crosses the threshold frequency.
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Abstract
Various embodiments are directed to a method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument. In accordance with the method, a generator is configured to generate at least one time varying electrical signal having a resonant frequency, monitor the resonant frequency of the at least one electrical signal, compare the resonant frequency to a threshold frequency, and trigger a first response of the generator when the resonant frequency crosses the threshold frequency.
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Citations
15 Claims
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1. A method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument, the method comprising:
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generating, by a generator, at least one time varying electrical signal having a resonant frequency; monitoring, by the generator, the resonant frequency of the at least one time varying electrical signal; comparing, by the generator, the resonant frequency to a threshold frequency; and triggering, by the generator, a first response of the generator when the resonant frequency crosses the threshold frequency. - View Dependent Claims (2, 3)
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4. A method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument, the method comprising:
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receiving, by a generator, a resonant frequency threshold; monitoring, by the generator, a resonant frequency of the ultrasonic drive system; comparing, by the generator, the resonant frequency of the ultrasonic drive system with the resonant frequency threshold; and incrementing, by the generator, a timer when the resonant frequency is less than the resonant frequency threshold. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A generator configured to drive an end effector coupled to an ultrasonic drive system of a surgical instrument, the generator comprising:
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a processor; a timer circuit coupled to the processor; a timer latch coupled to the processor; a condition set latch coupled to the processor; and a memory coupled to the processor, wherein the memory includes machine executable instructions that when executed by the processor cause the processor to; receive a resonant frequency threshold; monitor a resonant frequency of the ultrasonic drive system; compare the resonant frequency of the ultrasonic drive system with the resonant frequency threshold; and increment the timer circuit when the resonant frequency is less than the resonant frequency threshold. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification