公开(公告)号：WO2005046496A1

公开(公告)日：2005-05-26

申请号：PCT/US2003/037310

申请日：2003-11-21

Applicant: SHERWOOD SERVICES AG ,  WHAM, Robert Hartzell ,  STURM, Thomas, A.

Inventor： WHAM, Robert Hartzell ,  STURM, Thomas, A.

IPC: A61B18/12

CPC classification number: A61B18/1206 ,  A61B2018/00702 ,  A61B2018/00779 ,  A61B2018/00827 ,  A61B2018/00869 ,  A61B2018/00875 ,  A61B2018/00892

Abstract: An automatic control system for an electrosurgical generator is herein disclosed. The automatic control system includes voltage and current sensing circuits, a processing circuit, an output determining circuit, and a control circuit. Samples of the voltage and current outputs are supplied to the processing circuit and the output determining circuit to generate an output signal. The output signal is compared to a reference signal to generate a feedback signal for controlling a drive circuit.

Abstract translation: 本文公开了一种用于电外科发生器的自动控制系统。 自动控制系统包括电压和电流感测电路，处理电路，输出确定电路和控制电路。 电压和电流输出的样本被提供给处理电路和输出确定电路以产生输出信号。 将输出信号与参考信号进行比较，以产生用于控制驱动电路的反馈信号。

公开(公告)号：WO2004028385A1

公开(公告)日：2004-04-08

申请号：PCT/US2003/028537

申请日：2003-09-11

Applicant: SHERWOOD SERVICES AG ,  STURM, Thomas, A. ,  GREGG, William, N. ,  FREDRICKS, Raymond, A.

Inventor： STURM, Thomas, A. ,  GREGG, William, N. ,  FREDRICKS, Raymond, A.

IPC: A61B18/12

CPC classification number: A61B18/1233 ,  A61B18/16 ,  A61B2018/165

Abstract: A multiple RF return pad contact detection system is provided which is adaptive to different physiological characteristics of patients without being susceptible to electrosurgical current interference (e.g., interference or measurement interaction between components of the detection system). The detection system can measure or sense the contact resistance or impedance between the patient and pairs of RF return pads or return electrodes where multiple pairs of RF return pads are utilized due to the high current frequently needed during electrosurgery while eliminating or minimizing the risk of measurement interaction between the RF return pad pairs. The system allows for the independent and simultaneous measurement of the pad contact impedance for each pair of RF return pads. If the impedance of any pad pair is above a predetermined limit, the system turns off or reduces the electrosurgical output of the electrosurgical generator to prevent excess heating. The system eliminates or minimizes interference or measurement interaction between the pad pairs by providing a different signal source frequency for each pad contact pair, but a frequency which matches an associated series resonant network frequency. The current that flows in the series resonant network is a direct reflection or function of the pad impedance of the corresponding pad pair.

Abstract translation: 提供了适合于患者的不同生理特征而不易受电外科电流干扰（例如，检测系统的部件之间的干扰或测量相互作用）的多RF返回垫接触检测系统。 由于在电外科手术期间经常需要高电流，同时消除或最小化测量风险，所以检测系统可以测量或感测患者与成对的RF返回垫或返回电极之间的接触电阻或阻抗，其中多对RF返回垫被使用 RF返回焊盘对之间的相互作用。 该系统允许独立且同时测量每对RF返回焊盘的焊盘接触阻抗。 如果任何垫片对的阻抗高于预定极限，则系统关闭或降低电外科发生器的电外科输出以防止过度加热。 该系统通过为每个焊盘触点对提供不同的信号源频率，但是匹配相关的串联谐振网络频率的频率，消除或最小化了焊盘对之间的干扰或测量相互作用。 在串联谐振网络中流动的电流是相应焊盘对的焊盘阻抗的直接反射或函数。

公开(公告)号：WO2004028385A9

公开(公告)日：2004-11-25

申请号：PCT/US0328537

申请日：2003-09-11

Applicant: SHERWOOD SERV AG ,  STURM THOMAS A ,  GREGG WILLIAM N ,  FREDRICKS RAYMOND A

Inventor： STURM THOMAS A ,  GREGG WILLIAM N ,  FREDRICKS RAYMOND A

IPC: A61B18/12 ,  A61B18/16

CPC classification number: A61B18/1233 ,  A61B18/16

Abstract: A multiple RF return pad contact detection system is provided which is adaptive to different physiological characteristics of patients without being susceptible to electrosurgical current interference (e.g., interference or measurement interaction between components of the detection system). The detection system can measure or sense the contact resistance or impedance between the patient and pairs of RF return pads or return electrodes where multiple pairs of RF return pads are utilized due to the high current frequently needed during electrosurgery while eliminating or minimizing the risk of measurement interaction between the RF return pad pairs. The system allows for the independent and simultaneous measurement of the pad contact impedance for each pair of RF return pads. If the impedance of any pad pair is above a predetermined limit, the system turns off or reduces the electrosurgical output of the electrosurgical generator to prevent excess heating. The system eliminates or minimizes interference or measurement interaction between the pad pairs by providing a different signal source frequency for each pad contact pair, but a frequency which matches an associated series resonant network frequency. The current that flows in the series resonant network is a direct reflection or function of the pad impedance of the corresponding pad pair.

Abstract translation: 提供了多个RF返回焊盘接触检测系统，其适应于不受电外科电流干扰（例如，检测系统的部件之间的干扰或测量相互作用）的患者的不同生理特征。 检测系统可以测量或感测由于电外科手术期间频繁需要的高电流而使用多对RF返回垫的患者与RF返回垫对或返回电极之间的接触电阻或阻抗，同时消除或最小化测量的风险 RF返回焊盘对之间的相互作用。 该系统允许独立和同时测量每对RF返回焊盘的焊盘接触阻抗。 如果任何垫对的阻抗高于预定极限，则系统关闭或减少电外科发生器的电外科输出，以防止多余的加热。 该系统通过为每个焊盘触点对提供不同的信号源频率来消除或最小化焊盘对之间的干扰或测量相互作用，但是与相关联的串联谐振网络频率匹配的频率。 在串联谐振网络中流动的电流是相应焊盘对的焊盘阻抗的直接反射或函数。