System and method of controlling power delivery to a surgical instrument

摘要

A thermal surgical instrument having a system to control the delivery of power from an energy source to active element located on a tip. The system for controlling delivery to the tip may include a control algorithm which uses one or more measurements, such as tip current, SWR, and rapid changes in reflected power, to manage power without affecting cutting efficacy, and in a manner that may be imperceptible by a surgeon. The system may utilize a state machine to determine the current environment in which the tip may be in. Power delivered to the tip may be selectively managed according to a fixed power index or a repeatedly executed power profile.

主权项

1. A method of controlling a thermal cutting or coagulating instrument, comprising:
delivering an oscillating electrical energy to a thermal element, the thermal element comprising a conductor having a ferromagnetic material covering at least a portion of the conductor, the conductor in electrically conductive communication with the ferromagnetic material, and the ferromagnetic material having a thickness being between 0.5 μm and 500 μm; sensing a behavior characteristic associated with the thermal element; and adjusting delivery of the oscillating electrical energy in response to the behavior characteristic associated with the thermal element.