Ultrasonic instrument for surgical applications
AssigneeEthicon Endo-Surgery, Inc.
InventorJeffrey J. Vaitekunas
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Abstract
An improved surgical instrument is described wherein, an ultrasonic stack includes one or more piezoelectric sections surrounded by at least first resonator section and a second resonator section. The excitation signal for the ultrasonic stack is adapted to provide power at a first and a second frequency in order to drive the surgical tip of the instrument at a first frequency and second frequency simultaneously.
Claims17
A method of exciting an ultrasonic stack in a surgical instrument wherein said stack includes a piezoelectric section located between a first and a second resonator wherein said method comprises the steps of:
- exciting said piezoelectric section by driving said section with an electrical excitation signal at a first frequency;
- and
- simultaneously exciting said piezoelectric section by driving said section with an electrical excitation signal at a second frequency which is a multiple of said first frequency.
An ultrasonic surgical instrument comprising:
- a piezoelectric section between a first and a second resonator;
- an power source attached to said piezoelectric section wherein said power source simultaneously supplies said piezoelectric section with an excitation signal comprising at least a first signal at a first frequency and a second signal at a second frequency wherein said second frequency is an integer multiple of said first frequency.
An ultrasonic stack comprising:
- a first piezoelectric section;
- a second piezoelectric section;
- a first resonator abutting a first side of said first piezoelectric section;
- a second resonator abutting a second side of said first piezoelectric section and a first side of said second piezoelectric section;
- and
- a third resonator abutting a second side of said second piezoelectric section.
Dependencies are inferred from the claim text.