公开(公告)号：WO1996039089A1

公开(公告)日：1996-12-12

申请号：PCT/IB1996000552

申请日：1996-06-03

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  PATERSON, William, G.

IPC: A61B17/39

CPC classification number: A61B18/1206

Abstract: A power control apparatus for an electrosurgical generator (10) is used for controlling output power from the generator (10) to the tissue or bodily fluids of a patient (11). The control apparatus rapidly determines the range of impedance of the load on the electrosurgical generator (10) and adjusts the output power accordingly. Output current and output voltage from the electrosurgical generator (10) are monitored and sent to a microprocessor (18). The microprocessor (18) runs an algorithm that rapidly determines the impedance range of the load on the generator (10). The algorithm uses computational techniques, such as comparisons and bit shifting, that avoid long division and other time-consuming operations. The microprocessor (18) can then adjust a high voltage power supply (15) that effects the radio frequency amplifier stage. A method for controlling the power of the electrosurgical generator (10), including steps in the algorithm, is also disclosed.

Abstract translation: 用于电外科发生器（10）的功率控制装置用于控制从发生器（10）到患者（11）的组织或体液的输出功率。 控制装置快速地确定电外科发生器（10）上负载的阻抗范围，并相应地调节输出功率。 来自电外科发生器（10）的输出电流和输出电压被监测并发送到微处理器（18）。 微处理器（18）运行快速确定发电机（10）上的负载的阻抗范围的算法。 该算法使用诸如比较和比特移位的计算技术，避免长时间划分和其他耗时的操作。 微处理器（18）然后可以调节影响射频放大器级的高压电源（15）。 还公开了一种用于控制电外科发生器（10）的功率的方法，包括该算法中的步骤。

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。

公开(公告)号：WO1995003743A1

公开(公告)日：1995-02-09

申请号：PCT/IB1994000081

申请日：1994-04-26

Applicant: VALLEYLAB, INC.

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

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B18/12 ,  A61B18/1233 ,  A61B2018/00083 ,  A61B2018/0075

Abstract: An apparatus (10) and method to find leakage due to tissue load or transients at the start or end of electrosurgery. Active and return electrodes (11 and 16) between a patient and an ESU (13) pass RF energy sensed by inductive transformers (17 and 19). A circuit finds leakage at more than two thousand times per second; that frequency depends on the phase shift (23) between voltage and current. Software and feedback (26) manage RMS voltage to reduce the peak voltage of the output wave or increase the crest factor by pulse width modulation of the RF drive. Phase shift (23) changes of the active and return current signals (18 and 20) and peak voltage and current are found. The phase angle theta is compared to a threshold and if greater than the frequency at which the differences (22) between the active and return current signals (18 and 20) are examined is increased. The differences (22) between the active and return current signals (18 and 20) are examined and if greater than a maximum for leakage while the mode selected is in coagulation then the pulse width of the RF drive is reduced to hold voltage wave-form peaks at a predetermined value while the RMS voltage is reduced to lower the leakage to a maximum or the frequency at which the leakage current is calculated is held to a maximum level until the phase angle theta is smaller than the threshold. If the difference (22) is greater than a maximum for leakage while the mode is cut or bipolar then the Vrms is reduced to a maximum level or the level remains high until the phase angle theta is smaller than a threshold. The crest factor is increased by reducing the duty cycle or the pulse width of the output wave shape.

Abstract translation: 一种在电外科手术开始或结束时发现由于组织负荷或瞬变引起的渗漏的装置（10）和方法。 患者和ESU（13）之间的有源和返回电极（11和16）传递由感应变压器（17和19）感测的RF能量。 电路每秒发现二千多次泄漏; 该频率取决于电压和电流之间的相移（23）。 软件和反馈（26）管理RMS电压以降低输出波的峰值电压或通过RF驱动器的脉宽调制增加波峰因数。 发现有源和回流电流信号（18和20）和峰值电压和电流的相移（23）变化。 将相位角θ与阈值进行比较，并且如果大于检查有效和返回电流信号（18和20）之间的差（22）的频率增加。 检查有源和回流电流信号（18和20）之间的差异（22），并且如果在选择的模式处于凝结状态时大于泄漏的最大值，则RF驱动器的脉冲宽度被减小以保持电压波形 峰值处于预定值，同时RMS电压降低以将泄漏降低到最大值或将泄漏电流计算出的频率保持在最大电平，直到相位角θ小于阈值。 如果在模式被切断或双极时差（22）大于泄漏的最大值，则Vrms被减小到最大电平，或者水平保持高，直到相位角θ小于阈值。 通过减小输出波形的占空比或脉冲宽度来增加波峰因数。

公开(公告)号：WO1994023659A1

公开(公告)日：1994-10-27

申请号：PCT/IB1994000057

申请日：1994-04-06

Applicant: VALLEYLAB, INC.

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

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B18/1233 ,  A61B2018/00666 ,  A61B2018/00678 ,  A61B2018/00702 ,  A61B2018/00708 ,  A61B2018/00875

Abstract: A circuit, for monitoring and controlling parameters of an electrosurgical unit (10), ESU, relative to load and the RF energy, has a load responsive output sensing circuit (11) that measures the ESU load. A signal modifier (12) attached to the sensing circuit (11) enhances the signals measured and transmits them to a buffer (13). An analog to digital converter (18), A/D, digitizes the signals and samples wave pulse train at about eight million samples per second. A data memory (21) stores the digitized signals. An RF drive clock (27) connects to the ESU output; a sample clock (19) uses phase shifting to interrogate the input signals to a processor (20), DSP, at a greater sampling rate of frequency than without. The DSP receives the stored signals from the data memory (21) and processes them while monitoring and calculating ESU parameters measured, i.e. voltage, current, power, load impedance, leakage current, peak to peak voltage, peak to peak current, spectral content and/or crest factor of the RF wave pulse train energy to use as controlling feedback to either a high voltage power supply in the ESU, regulating the RF drive pulses or both. A method monitors and controls the ESU relative to load and has the steps of collecting parameters with the ESU output sensing circuit (11) responsive to loads; enhancing signals with the signal modifier (12); transmitting signals to the buffer (13); converting signals with the A/D converter (18); storing signals in the data memory (21); receiving signals in the DSP, and processing, monitoring and controlling signals by repeatedly measuring ESU output parameters.

Abstract translation: 用于监测和控制电外科单元（10），ESU相对于负载和RF能量的参数的电路具有测量ESU负载的负载响应输出检测电路（11）。 附接到感测电路（11）的信号调节器（12）增强测量的信号并将其发送到缓冲器（13）。 A / D模数转换器（18）对信号进行数字化处理，每秒采样波形脉冲序列约800万个。 数据存储器（21）存储数字化信号。 RF驱动时钟（27）连接到ESU输出; 采样时钟（19）使用相移来以比没有频率更大的采样频率向输入信号询问处理器（20）DSP。 DSP接收来自数据存储器（21）的存储信号，并在监测和计算测量的ESU参数，即电压，电流，功率，负载阻抗，漏电流，峰峰值电压，峰峰值电流，频谱含量和 RF波脉冲串能量的波峰因数用作控制反馈给ESU中的高压电源，调节RF驱动脉冲或两者。 一种方法监测和控制ESU相对于负载，并具有响应于负载与ESU输出检测电路（11）收集参数的步骤; 用信号调节器增强信号（12）; 向所述缓冲器发送信号; 用A / D转换器（18）转换信号; 将信号存储在数据存储器（21）中; 在DSP中接收信号，并通过重复测量ESU输出参数来处理，监控和控制信号。

公开(公告)号：EP0830094A1

公开(公告)日：1998-03-25

申请号：EP96915136.0

申请日：1996-06-03

Applicant: VALLEYLAB, INC.

Inventor： PATERSON, William, G.

IPC: A61B18

CPC classification number: A61B18/1206

Abstract: A power control apparatus for an electrosurgical generator (10) is used for controlling output power from the generator (10) to the tissue or bodily fluids of a patient (11). The control apparatus rapidly determines the range of impedance of the load on the electrosurgical generator (10) and adjusts the output power accordingly. Output current and output voltage from the electrosurgical generator (10) are monitored and sent to a microprocessor (18). The microprocessor (18) runs an algorithm that rapidly determines the impedance range of the load on the generator (10). The algorithm uses computational techniques, such as comparisons and bit shifting, that avoid long division and other time-consuming operations. The microprocessor (18) can then adjust a high voltage power supply (15) that effects the radio frequency amplifier stage. A method for controlling the power of the electrosurgical generator (10), including steps in the algorithm, is also disclosed.

公开(公告)号：EP0710090A1

公开(公告)日：1996-05-08

申请号：EP94912050.0

申请日：1994-04-26

Applicant: VALLEYLAB, INC.

Inventor： KLICEK, Michael, S. ,  PATERSON, William, G.

IPC: A61B18

CPC classification number: A61B18/1206 ,  A61B18/12 ,  A61B18/1233 ,  A61B2018/00083 ,  A61B2018/0075

Abstract: An apparatus (10) and method to find leakage due to tissue load or transients at the start or end of electrosurgery. Active and return electrodes (11 and 16) between a patient and an ESU (13) pass RF energy sensed by inductive transformers (17 and 19). A circuit finds leakage at more than two thousand times per second; that frequency depends on the phase shift (23) between voltage and current. Software and feedback (26) manage RMS voltage to reduce the peak voltage of the output wave or increase the crest factor by pulse width modulation of the RF drive. Phase shift (23) changes of the active and return current signals (18 and 20) and peak voltage and current are found. The phase angle υ is compared to a threshold and if greater than the frequency at which the differences (22) between the active and return current signals (18 and 20) are examined is increased. The differences (22) between the active and return current signals (18 and 20) are examined and if greater than a maximum for leakage while the mode selected is in coagulation then the pulse width of the RF drive is reduced to hold voltage wave-form peaks at a predetermined value while the RMS voltage is reduced to lower the leakage to a maximum or the frequency at which the leakage current is calculated is held to a maximum level until the phase angle υ is smaller than the threshold. If the difference (22) is greater than a maximum for leakage while the mode is cut or bipolar then the Vrms is reduced to a maximum level or the level remains high until the phase angle υ is smaller than a threshold. The crest factor is increased by reducing the duty cycle or the pulse width of the output wave shape.

公开(公告)号：EP0695144B1

公开(公告)日：1998-12-09

申请号：EP94910498.8

申请日：1994-04-06

Applicant: VALLEYLAB, INC.

Inventor： KLICEK, Michael, S. ,  PATERSON, William, G.

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B18/1233 ,  A61B2018/00666 ,  A61B2018/00678 ,  A61B2018/00702 ,  A61B2018/00708 ,  A61B2018/00875

公开(公告)号：EP0710090B1

公开(公告)日：1997-08-13

申请号：EP94912050.5

申请日：1994-04-26

Applicant: VALLEYLAB, INC.

Inventor： KLICEK, Michael, S. ,  PATERSON, William, G.

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B18/12 ,  A61B18/1233 ,  A61B2018/00083 ,  A61B2018/0075

Abstract: An apparatus (10) and method to find leakage due to tissue load or transients at the start or end of electrosurgery. Active and return electrodes (11 and 16) between a patient and an ESU (13) pass RF energy sensed by inductive transformers (17 and 19). A circuit finds leakage at more than two thousand times per second; that frequency depends on the phase shift (23) between voltage and current. Software and feedback (26) manage RMS voltage to reduce the peak voltage of the output wave or increase the crest factor by pulse width modulation of the RF drive. Phase shift (23) changes of the active and return current signals (18 and 20) and peak voltage and current are found. The phase angle υ is compared to a threshold and if greater than the frequency at which the differences (22) between the active and return current signals (18 and 20) are examined is increased. The differences (22) between the active and return current signals (18 and 20) are examined and if greater than a maximum for leakage while the mode selected is in coagulation then the pulse width of the RF drive is reduced to hold voltage wave-form peaks at a predetermined value while the RMS voltage is reduced to lower the leakage to a maximum or the frequency at which the leakage current is calculated is held to a maximum level until the phase angle υ is smaller than the threshold. If the difference (22) is greater than a maximum for leakage while the mode is cut or bipolar then the Vrms is reduced to a maximum level or the level remains high until the phase angle υ is smaller than a threshold. The crest factor is increased by reducing the duty cycle or the pulse width of the output wave shape.

公开(公告)号：EP0695144A1

公开(公告)日：1996-02-07

申请号：EP94910498.0

申请日：1994-04-06

Applicant: VALLEYLAB, INC.

Inventor： KLICEK, Michael, S. ,  PATERSON, William, G.

IPC: A61B18

CPC classification number: A61B18/1206 ,  A61B18/1233 ,  A61B2018/00666 ,  A61B2018/00678 ,  A61B2018/00702 ,  A61B2018/00708 ,  A61B2018/00875

Abstract: A circuit, for monitoring and controlling parameters of an electrosurgical unit (10), ESU, relative to load and the RF energy, has a load responsive output sensing circuit (11) that measures the ESU load. A signal modifier (12) attached to the sensing circuit (11) enhances the signals measured and transmits them to a buffer (13). An analog to digital converter (18), A/D, digitizes the signals and samples wave pulse train at about eight million samples per second. A data memory (21) stores the digitized signals. An RF drive clock (27) connects to the ESU output; a sample clock (19) uses phase shifting to interrogate the input signals to a processor (20), DSP, at a greater sampling rate of frequency than without. The DSP receives the stored signals from the data memory (21) and processes them while monitoring and calculating ESU parameters measured, i.e. voltage, current, power, load impedance, leakage current, peak to peak voltage, peak to peak current, spectral content and/or crest factor of the RF wave pulse train energy to use as controlling feedback to either a high voltage power supply in the ESU, regulating the RF drive pulses or both. A method monitors and controls the ESU relative to load and has the steps of collecting parameters with the ESU output sensing circuit (11) responsive to loads; enhancing signals with the signal modifier (12); transmitting signals to the buffer (13); converting signals with the A/D converter (18); storing signals in the data memory (21); receiving signals in the DSP, and processing, monitoring and controlling signals by repeatedly measuring ESU output parameters.