Devices and techniques for cutting and coagulating tissue
View Patent ↗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.
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 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.
2. The method of claim 1 , comprising triggering an audible response when the first set of logic conditions is met.
3. The method of claim 1 , comprising triggering a visual response when the first set of logic conditions is met.
4. The method of claim 1 , comprising repeating generating by the generator a pulse amplitude for a pulse time, where the pulse time is the period over which the pulse amplitude is driven by the generator.
5. The method of claim 1 , comprising:
monitoring the at least one electrical signal against a second set of logic conditions; and
triggering a second response of the generator when the second set of logic conditions is met.
6. The method of claim 5 , comprising determining the triggering of the first or the second response on a hierarchical basis.
7. 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.
8. The device of claim 7 , comprising a speaker coupled to and responsive to the trigger circuit.
9. The device of claim 7 , comprising a display coupled to and responsive to the trigger circuit.