System and method for controlling an ultrasonic tool
AssigneeStryker Corporation
InventorAdam Darwin Downey
Life of this patent
Estimating the term…
Abstract
Systems and methods of controlling an ultrasonic surgical tool with a console are provided. A first drive signal is applied to the ultrasonic surgical tool. A characteristic of a harmonic signal resulting from application of the first drive signal to the ultrasonic surgical tool is acquired. A cancellation signal is generated based on the characteristic of the harmonic signal. The first drive signal and the cancellation signal are combined to produce a second drive signal that is sinusoidal. The second drive signal is applied to the ultrasonic surgical tool such that presence of the harmonic signal resulting from application of the second drive signal is reduced relative to presence of the harmonic signal resulting from application of the first drive signal.
Claims20
A method of controlling an ultrasonic surgical tool to reduce presence of a harmonic signal, the ultrasonic surgical tool including a handpiece and a tip coupled to the handpiece, the handpiece including a transducer for vibrating the tip upon receive of a drive signal, the method comprising:
- obtaining a value of a capacitance of the handpiece;
- driving the ultrasonic surgical tool with a first drive signal;
- acquiring at least one characteristics of the harmonic signal resulting from driving the ultrasonic surgical tool with the first drive signal based on the obtained capacitance value;
- generating a cancellation signal based on the at least one acquired characteristic of the harmonic signal;
- combining the first drive signal and the cancellation signal to produce a second drive signal;
- and
- driving the ultrasonic surgical tool with the second drive signal such that presence of the harmonic signal resulting from driving the ultrasonic surgical tool with the second drive signal is reduced relative to presence of the harmonic signal resulting from driving the ultrasonic surgical tool with the first drive signal.
A console for controlling an ultrasonic surgical tool to reduce presence of a harmonic signal, the ultrasonic surgical tool including a handpiece and a tip coupled to the handpiece, the handpiece including a transducer for vibrating the tip upon receive of a drive signal, the console comprising:
- a controller configured to:
- obtain a value of a capacitance of the handpiece;
- drive the ultrasonic surgical tool with a first drive signal;
- acquire at least one characteristic of the harmonic signal resulting from driving the ultrasonic surgical tool with the first drive signal based on the obtained capacitance value;
- generate a cancellation signal based on the at least one acquired characteristic of the harmonic signal;
- combine the first drive signal and the cancellation signal to produce a second drive signal;
- and
- drive the ultrasonic surgical tool with the second drive signal such that presence of the harmonic signal resulting from driving the ultrasonic surgical tool with the second drive signal is reduced relative to presence of the harmonic signal resulting from driving the ultrasonic surgical tool with the first drive signal.
Dependencies are inferred from the claim text.