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Managing tissue treatment

  • US 10,194,972 B2
  • Filed: 08/26/2014
  • Issued: 02/05/2019
  • Est. Priority Date: 08/26/2014
  • Status: Active Grant
First Claim
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1. A surgical system for providing a drive signal to a surgical device for treating tissue, the surgical system comprising:

  • a surgical generator, wherein the surgical generator is programmed to;

    deliver the drive signal according to a first composite load curve, wherein the first composite load curve defines a first level of power to be delivered to the tissue as a function of at least one measured property of the tissue, and wherein the first composite load curve defines a plurality of pulses to be sequentially applied to the tissue;

    receive a first tissue measurement over a period of a pulse of the plurality of pulses of the drive signal indicating a property of the tissue at a first time during the delivery of the pulse of the plurality of pulses of the drive signal;

    receive a second tissue measurement over the period of the pulse indicating the property of the tissue at a second time during the delivery of the pulse of the plurality of pulses of the drive signal, wherein the second time is after the first time;

    determine, prior to completion of the delivery of the pulse, a difference in the property of the tissue between the first time and the second time based on the first and second tissue measurements;

    prior to completion of the first composite load curve, when the difference in the property of the tissue exceeds a difference threshold of the property of the tissue, deliver the drive signal according to a second composite load curve, wherein the second composite load curve defines a second level of power, and wherein the second level of power is greater than the first level of power.

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