Managing tissue treatment
First Claim
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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Accused Products
Abstract
Various embodiments are directed to systems and methods for providing segmented power curves to tissue. A surgical generator may receive an indication of a first impedance of tissue to be treated by a surgical end effector. The generator may determine that the first impedance is within an impedance range corresponding to a first power curve segment of the segmented power curve and provide a drive signal to the end effector according to a first power curve. The generator may further receive an indication of a second impedance of the tissue to be treated by the end effector, determine that the second impedance is within an impedance range corresponding to a second power curve segment of the segmented power curve, and provide the drive signal to the end effector according to a second power curve.
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Citations
10 Claims
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1. A surgical system, the surgical system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification