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 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;
determining from the at least one electrical signal a parameter associated with the surgical instrument,wherein the determined parameter is indicative of a temperature change of the end effector; and
monitoring impedance of a transducer of the ultrasonic drive system in a dwells region during pulsed activation.
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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. The method comprises generating at least one electrical signal. The at least one electrical signal is monitored against a first set of logic conditions. A first response is triggered when the first set of logic conditions is met. A parameter is determined from the at least one electrical signal.
2352 Citations
18 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 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; determining from the at least one electrical signal a parameter associated with the surgical instrument, wherein the determined parameter is indicative of a temperature change of the end effector; and monitoring impedance of a transducer of the ultrasonic drive system in a dwells region during pulsed activation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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 electrical signal; determining from the at least one electrical signal a parameter associated with the end effector; comparing the determined parameter against a predetermined parameter, wherein the determined parameter is indicative of a temperature change of the end effector; and monitoring impedance of the end effector of the ultrasonic drive system in a dwells region during pulsed activation. - View Dependent Claims (10, 11, 12, 13)
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14. 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 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; determining a frequency slope of the at least one electrical signal; and monitoring impedance of the end effector of the ultrasonic drive system in a dwells region during pulsed activation. - View Dependent Claims (15, 16, 17, 18)
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Specification