Devices and techniques for cutting and coagulating tissue
AssigneeEthicon Endo-Surgery, Inc.
InventorsJeffrey D. Messerly, Eitan T. Wiener, Brian T. Noyes, Jeffrey L. Aldridge, James R. Giordano, Daniel J. Abbott, Matthew C. Miller, Nathan J. Price, Daniel W. Price
Life of this patent
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Abstract
Various embodiments are directed to an apparatus and method of driving an end effector coupled to an ultrasonic drive system of a surgical instrument. The method comprises generating at least one electrical signal. The at least one electrical signal is monitored against a first set of logic conditions.
Claims9
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 electrical signal;
- monitoring the at least one electrical signal against a first set of logic conditions;
- triggering a first response of the generator when the first set of logic conditions is met;
- triggering a pulsing response when the first set of logic conditions is met;
- and
- wherein the pulsing response comprises:
- generating by the generator a first pulse amplitude for a first pulse time, where the first pulse time is the period over which the first pulse amplitude is driven by the generator;
- and
- generating by the generator a second pulse amplitude for a second pulse time, where the second pulse time is the period over which the second pulse amplitude is driven by the generator.
A device for driving an end effector coupled to an ultrasonic drive system of a surgical instrument, the generator comprising:
- a signal processor operative to generate at least one electrical signal;
- a first circuit to monitor the at least one electrical signal against a first set of logic conditions;
- and
- a second circuit to trigger a first response of the generator when the first set of logic conditions is met;
- a pulsing circuit coupled to and responsive to the trigger circuit;
- wherein the pulsing circuit is operative to generate a first pulse amplitude for a first pulse time, where the first pulse time is the period over which the first pulse amplitude is driven by the generator;
- and generate a second pulse amplitude for a second pulse time, where the second pulse time is the period over which the second pulse amplitude is driven by the generator.
Dependencies are inferred from the claim text.