Ultrasonic surgical tool capable of vibrating in plural modes and a drive system that induces non-linear vibrations in the tool tip
AssigneeStryker Corporation
InventorsAdam D. Downey, Robert M. Baldwin, II
Life of this patent
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Abstract
An ultrasonic surgical tool system with a tip capable of simultaneously vibrating in plural modes. The system includes a console capable of supplying a drive signal to the tip that includes plural components. Each component has a frequency characteristic that is based in part on the equivalent of current through the mechanical components of the tip. The frequency components are different from each other. Based on the application of drive signal the tip undergoes non-linear vibrations.
Claims20
An assembly for vibrating a tip of an ultrasonic surgical tool, the ultrasonic surgical tool having at least one driver to which an AC drive signal is applied to vibrate the tip, the tip being designed to vibrate in plural vibratory modes, the assembly including:
- an assembly for generating a variable AC drive signal that is applied to the at least one driver of the ultrasonic surgical tool;
- and
- a processor configured to:
- read from a memory associated with the tip data indicative of at least one drive signal characteristic for each of the vibratory modes;
- and
- assert a command to the assembly that generates the AC drive signal so as to cause the assembly to generate an AC drive signal that contains a component for each of the vibratory modes that is based on the at least one drive signal characteristic indicated by the read data for the vibratory mode.
A sleeve for an ultrasonic surgical tool including a tip and at least one driver to which the tip is coupled and to which an AC drive signal is sourced from a control console to vibrate the tip, the tip being designed to vibrate in plural vibratory modes, the sleeve comprising:
- a body including open proximal and distal ends and a conduit for flowing irrigating fluid down the sleeve and out the open distal end during operation of the ultrasonic surgical tool to vibrate the tip, the body adapted to be disposed around the tip and placed in an operative position for operating the ultrasonic surgical tool to vibrate the tip in which the tip extends from the open proximal end and out the open distal end;
- and
- a tip memory disposed in the body and storing data for controlling actuation of the tip that indicates at least one drive signal characteristic for each of the vibratory modes.
An assembly for vibrating a tip of an ultrasonic surgical tool, the ultrasonic surgical tool having at least one driver to which an AC drive signal is applied to vibrate the tip, the tip being designed to vibrate in plural vibratory modes, the assembly including:
- an assembly for generating a variable AC drive signal that is applied to the at least one driver;
- a first assembly for measuring a voltage of the AC drive signal;
- a second assembly for measuring a current of the AC drive signal;
- and
- a processor configured to:
- determine at least one drive signal characteristic for each of the vibratory modes based on the voltage of the drive signal measured with the first AC assembly and the current of the AC drive signal measured with the second assembly;
- and
- assert a command to the assembly that generates the AC drive signal so as to cause the assembly to generate an AC drive signal containing a component for each of the vibratory modes that is based on the at least one drive signal characteristic determined for the vibratory mode.
Dependencies are inferred from the claim text.