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System and method for pulsed ultrasonic power delivery employing cavitational effects

  • US 8,945,162 B2
  • Filed: 11/18/2010
  • Issued: 02/03/2015
  • Est. Priority Date: 10/21/2002
  • Status: Active Grant
First Claim
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1. A method for delivering ultrasonic energy during a surgical procedure performed within a surgical environment comprising a fluid, comprising:

  • applying ultrasonic energy at a first energy level above a de minimis energy level for a time period sufficient to induce transient cavitation within the fluid, wherein the time period is between two and three milliseconds; and

    providing ultrasonic energy for a predetermined period after attaining transient cavitation within the fluid according to a successively decreasing stepped-down ultrasonic energy level profile comprising applying energy at a nonzero second lower constant value energy level above the de minimis energy level and lower than the first energy level;

    wherein the predetermined period begins immediately after the time period ends, and wherein ultrasonic energy is provided at a zero energy level before the time period and after applying ultrasonic energy according to the successively decreasing stepped down ultrasonic energy level profile.

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