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Managing tissue treatment

  • US 10,321,950 B2
  • Filed: 03/17/2015
  • Issued: 06/18/2019
  • Est. Priority Date: 03/17/2015
  • Status: Active Grant
First Claim
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1. A surgical system, the surgical system comprising:

  • an end effector of a surgical instrument, wherein the end effector is configured to grasp tissue;

    a generator communicatively coupled to the end effector, the generator capable of delivering energy to the tissue grasped by the end effector according to a first and second power curve stored in memory, wherein the first power curve defines a first range of power levels that is greater than a second range of power levels defined by the second power curve, wherein the generator is configured to;

    receive a tissue impedance value corresponding to an impedance of the tissue grasped by the end effector; and

    wherein when the tissue impedance value is within a first range of tissue impedance, the generator is further configured to;

    deliver energy to the end effector according to the first power curve; and

    wherein when the tissue impedance value is within a second range of tissue impedance, the generator is further configured to alternately apply segments of the first and second power curve to reduce a rate of increase of tissue impedance within the second range of tissue impedance by;

    generating a segment of the second power curve to deliver energy to the end effector according to the segment of the second power curve while the tissue impedance value is within a first subrange of the second range of tissue impedance; and

    generating a segment of the first power curve to deliver energy to the end effector according to the segment of the first power curve while the tissue impedance value is within a second subrange of the second range of tissue impedance.

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