公开(公告)号：WO1996039086A1

公开(公告)日：1996-12-12

申请号：PCT/IB1996000549

申请日：1996-06-03

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  BELL, Gregory, J. ,  KLICEK, Michael, S. ,  PATERSON, William, G.

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B2018/0016 ,  A61B2018/00666 ,  A61B2018/00702 ,  A61B2018/00791 ,  A61B2018/00827 ,  A61B2018/00869 ,  A61B2018/00875 ,  A61B2018/1253

Abstract: A power control system for an electrosurgical generator (11) will control the output power to desired levels. The power control system uses a simple closed-loop control algorithm. Sensors in the electrosurgical generator (11) will monitor changes in output current and output voltage. There may also be sensors to monitor changes in the temperature of the electrosurgical tool, mechanical strain in the electrosurgical tool, or phase shift between output voltage and output current. A microprocessor (19) in the electrosurgical generator (11) is connected to the sensors and repetitively compares the sensed values against their respective threshold values. The threshold values are computed by the microprocessor (19) based on the desired output power, or other desired tissue effects. The microprocessor (19) also has an output to control an adjustable high voltage power supply (15) in the electrosurgical generator (11). The microprocessor (19) will adjust the high voltage power supply (15) to maintain all sensed values below their respective threshold values. The threshold values are computed by the microprocessor (19) based on the desired output power, or other desired tissue effects. The threshold values may also be computed as a function of the impedance of the output load on the electrosurgical generator (11).

Abstract translation: 用于电外科发生器（11）的功率控制系统将将输出功率控制到期望的水平。 功率控制系统采用简单的闭环控制算法。 电外科发生器（11）中的传感器将监测输出电流和输出电压的变化。 还可以有传感器来监测电外科手术工具的温度变化，电外科手术工具中的机械应变或输出电压与输出电流之间的相移。 电外科发生器（11）中的微处理器（19）连接到传感器，并将感测值与它们各自的阈值重复比较。 阈值由微处理器（19）基于期望的输出功率或其他期望的组织效应计算。 微处理器（19）还具有用于控制电外科发生器（11）中的可调高压电源（15）的输出。 微处理器（19）将调节高压电源（15）以将所有感测值保持在其各自的阈值以下。 阈值由微处理器（19）基于期望的输出功率或其他期望的组织效应计算。 也可以根据电外科发生器（11）上的输出负载的阻抗来计算阈值。