Managing tissue treatment

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 drive signal 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 of the drive signal, a difference in the property of the drive signal 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 drive signal 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.

A method of providing a drive signal to a surgical device for treating tissue, the method comprising:

• delivering the drive signal to a surgical device 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 drive signal;
• receiving 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;
• receiving 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;
• determining, 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, delivering 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.