Ultrasonic device for cutting and coagulating with stepped output
First Claim
1. A method for driving an end effector coupled to an ultrasonic drive system of a surgical instrument, the method comprising:
- generating a first ultrasonic drive signal by a generator coupled to an ultrasonic drive system, wherein the ultrasonic drive system comprises 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;
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;
wherein the first drive signal is different from the second drive signal over the respective first and second periods;
generating a third ultrasonic drive signal by the generator; and
actuating the ultrasonic transducer with the third ultrasonic drive signal for a third period;
wherein the third drive signal is different from the first and second drive signals over the first, second, and third periods; and
wherein the first, second, and third drive signals define a step function waveform over the first, second, and third periods.
4 Assignments
0 Petitions
Accused Products
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.
1839 Citations
11 Claims
-
1. A method for driving an end effector coupled to an ultrasonic drive system of a surgical instrument, the method comprising:
-
generating a first ultrasonic drive signal by a generator coupled to an ultrasonic drive system, wherein the ultrasonic drive system comprises 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; 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; wherein the first drive signal is different from the second drive signal over the respective first and second periods; generating a third ultrasonic drive signal by the generator; and actuating the ultrasonic transducer with the third ultrasonic drive signal for a third period; wherein the third drive signal is different from the first and second drive signals over the first, second, and third periods; and wherein the first, second, and third drive signals define a step function waveform over the first, second, and third periods. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for driving an end effector coupled to an ultrasonic drive system of a surgical instrument, the method comprising:
-
generating a first ultrasonic drive signal by a generator coupled to an ultrasonic drive system, wherein the ultrasonic drive system comprises 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; 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; wherein the first drive signal is different from the second drive signal over the respective first and second periods; wherein the first and second drive signals define a step function waveform over the first and second periods; generating the first ultrasonic drive signal at a first frequency different from the resonant frequency; actuating the ultrasonic transducer with the first ultrasonic device signal at the first frequency for the first period to provide a first level of mechanical vibration to the end effector suitable for separating a first tissue from a second tissue; generating the second ultrasonic drive signal at the resonance frequency; and actuating the ultrasonic transducer with the second ultrasonic drive signal at the resonant frequency for the second period subsequent to the first period to provide a second level of mechanical vibration to the end effector suitable for transecting and sealing the first tissue. - View Dependent Claims (8, 9, 10, 11)
-
Specification