公开(公告)号：WO1996019152A1

公开(公告)日：1996-06-27

申请号：PCT/IB1995001094

申请日：1995-12-04

Applicant: VALLEYLAB, INC.

Inventor： VALLEYLAB, INC. ,  BECKER, Daniel, J.

IPC: A61B17/39

CPC classification number: A61B18/1233 ,  A61B18/16

Abstract: A neutral electrode, consisting of two parts (20, 21), is continuously monitored by an adaptive monitoring system to guarantee conditions of optimal electrical contact with the patient's skin in order to prevent burns. A special adaptive signal generator produces a signal coupled between the two parts of the return electrode by means of an insulation transformer (10). Current and applied voltage are (38) continuously monitored for phase differencies which in turn pilot a phase locked oscillator. The continuous adaption of the generated frequency by the above described feed back phase controlled loop allows to obtain an optimal testing frequency for each patient electrode combination. The optimal frequency is then obtained when the phase difference between test voltage and current is minimal.

Abstract translation: 由两部分（20,21）组成的中性电极通过自适应监测系统连续监测，以保证与患者皮肤最佳电接触的状况，以防止灼伤。 特殊的自适应信号发生器通过绝缘变压器（10）产生耦合在返回电极的两个部分之间的信号。 电流和施加电压（38）连续监测相位差，从而导致锁相振荡器。 通过上述反馈相位控制环路连续适应所产生的频率，可以获得每个患者电极组合的最佳测试频率。 当测试电压和电流之间的相位差最小时，得到最佳频率。

公开(公告)号：WO1997011648A2

公开(公告)日：1997-04-03

申请号：PCT/IB1996000618

申请日：1996-06-28

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  BECKER, Daniel, J. ,  KLICEK, Michael, S.

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B2018/00875

Abstract: A constant power control circuit (107) for an electrosurgical generator (101) and a method for maintaining the electrical power output of an electrosurgical generator (101) at a generally constant value throughout a given tissue impedance range are disclosed. The constant power control circuit (107) and the method recognize and use the unique and simple linear characteristics associated with certain electrosurgical generator (101) designs to monitor and control the electrical power output without having to calculate or monitor the actual output power. The constant power control circuit (107) includes a current sampling circuit (115), a linear conversion circuit (117), and a feedback correction circuit (119). The constant power control circuit (107) may also include protection circuitry that prevents the electrosurgical generator (101) from being over-driven during high and/or low impedance loading (121), and reduces the severity of exit sparking by providing a quick response to high impedance indications while nonetheless maintaining increased power levels throughout a preset, nominal impedance range. The constant power control circuit (107) and method may be included as an integral part of the overall electrosurgical generator's (101) circuitry, or may be embodied as a separate unit that connects to, and controls, an electrosurgical generator (101). The constant power control circuit (107) and method may be embodied through a variety of analog and/or digital circuit components or arrangements, including software running on computational and memory circuitry.

Abstract translation: 公开了一种用于电外科发生器（101）的恒定功率控制电路（107）和用于在整个给定组织阻抗范围内将电外科发生器（101）的电功率输出维持在大致恒定值的方法。 恒定功率控制电路（107）并且该方法识别和使用与某些电外科发生器（101）设计相关联的独特且简单的线性特征来监测和控制电功率输出，而不必计算或监测实际的输出功率。 恒定功率控制电路（107）包括电流采样电路（115），线性转换电路（117）和反馈校正电路（119）。 恒定功率控制电路（107）还可以包括防止电外科生成器（101）在高阻抗和/或低阻抗负载（121）期间被过驱动的保护电路，并且通过提供快速响应来降低出口火花的严重性 到高阻抗指示，同时在预设的标称阻抗范围内保持增加的功率水平。 恒定功率控制电路（107）和方法可以被包括作为整个电外科生成器（101）电路的组成部分，或者可以被实施为连接到电外科发生器（101）并且控制电外科发生器（101）的单独单元。 恒定功率控制电路（107）和方法可以通过各种模拟和/或数字电路组件或布置来实现，包括在计算和存储器电路上运行的软件。

公开(公告)号：EP0852479A2

公开(公告)日：1998-07-15

申请号：EP96917617.0

申请日：1996-06-28

Applicant: VALLEYLAB, INC.

Inventor： BECKER, Daniel, J. ,  KLICEK, Michael, S.

IPC: A61B18

CPC classification number: A61B18/1206 ,  A61B2018/00875

Abstract: A constant power control circuit (107) for an electrosurgical generator (101) and a method for maintaining the electrical power output of an electrosurgical generator (101) at a generally constant value throughout a given tissue impedance range are disclosed. The constant power control circuit (107) and the method recognize and use the unique and simple linear characteristics associated with certain electrosurgical generator (101) designs to monitor and control the electrical power output without having to calculate or monitor the actual output power. The constant power control circuit (107) includes a current sampling circuit (115), a linear conversion circuit (117), and a feedback correction circuit (119). The constant power control circuit (107) may also include protection circuitry that prevents the electrosurgical generator (101) from being over-driven during high and/or low impedance loading (121), and reduces the severity of exit sparking by providing a quick response to high impedance indications while nonetheless maintaining increased power levels throughout a preset, nominal impedance range. The constant power control circuit (107) and method may be included as an integral part of the overall electrosurgical generator's (101) circuitry, or may be embodied as a separate unit that connects to, and controls, an electrosurgical generator (101). The constant power control circuit (107) and method may be embodied through a variety of analog and/or digital circuit components or arrangements, including software running on computational and memory circuitry.