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    A CONTROL SYSTEM FOR NEUROSURGICAL ELECTROSURGICAL UNIT
    1.
    发明专利
    A CONTROL SYSTEM FOR NEUROSURGICAL ELECTROSURGICAL UNIT 未知

    公开(公告)号：CA2220904C

    公开(公告)日：2001-08-14

    申请号：CA2220904

    申请日：1996-06-03

    Applicant: VALLEYLAB INC

    Inventor： EGGLESTON JEFFREY L ,  SODNICAR MATTHEW J ,  ORSZULAK JAMES H

    IPC: A61B18/12 ,  A61B18/14 ,  A61B17/39

    Abstract: A control system (10) and method for the operation of neurosurgical bipolar electrodes (11) provides a source of high frequency energy (13') connected t o bipolar electrodes (11). Contacting surfaces are on the bipolar electrodes (11) of highly electrically conductive material. A current transducer attach ed to the source of high frequency energy (13') measures (20) the RMS current applied between the contact surfaces (25). A current transducer attached to the source of high frequency energy (13') provides a signal (26) correlated to the instantaneous values of the RMS voltage between the contacts. A control connects to the source of high frequency energy (13') for initially regulati ng the RMS current applied by the contacting surfaces in response to the impedance until the signal (19) divided by the measure (20) which is representative of the instantaneous impedance of the load reaches a predetermined value. The control regulates the RMS power applied by the contacting surfaces in accord with the impedance until the signal (19) divid ed by the measure (20) reaches a predefined value. The control responds to the measure (20) and the signal (19) so that the RMS voltage applied to the load being treated between the contacting surfaces regulated while its impedance is monitored until a prescribed value is reached. The control regulates the RMS voltage applied in accord with the impedance by changing the RMS voltage to a percentage of that applied until the prescribed value is obtained so that th e tissues stay moist and are coagulated without drying and carbonizing or turning to eschar.

    A CONTROL SYSTEM FOR NEUROSURGICAL ELECTROSURGICAL UNIT
    2.
    发明专利
    A CONTROL SYSTEM FOR NEUROSURGICAL ELECTROSURGICAL UNIT 未知

    公开(公告)号：CA2220904A1

    公开(公告)日：1996-12-12

    申请号：CA2220904

    申请日：1996-06-03

    Applicant: VALLEYLAB INC

    Inventor： ORSZULAK JAMES H ,  EGGLESTON JEFFREY L ,  SODNICAR MATTHEW J

    IPC: A61B18/12 ,  A61B18/14 ,  A61B17/39

    Abstract: A control system (10) and method for the operation of neurosurgical bipolar electrodes (11) provides a source of high frequency energy (13') connected to bipolar electrodes (11). Contacting surfaces are on the bipolar electrodes (11) of highly electrically conductive material. A current transducer attached to the source of high frequency energy (13') measures (20) the RMS current applied between the contact surfaces (25). A current transducer attached to the source of high frequency energy (13') provides a signal (26) correlated to the instantaneous values of the RMS voltage between the contacts. A control connects to the source of high frequency energy (13') for initially regulating the RMS current applied by the contacting surfaces in response to the impedance until the signal (19) divided by the measure (20) which is representative of the instantaneous impedance of the load reaches a predetermined value. The control regulates the RMS power applied by the contacting surfaces in accord with the impedance until the signal (19) divided by the measure (20) reaches a predefined value. The control responds to the measure (20) and the signal (19) so that the RMS voltage applied to the load being treated between the contacting surfaces regulated while its impedance is monitored until a prescribed value is reached. The control regulates the RMS voltage applied in accord with the impedance by changing the RMS voltage to a percentage of that applied until the prescribed value is obtained so that the tissues stay moist and are coagulated without drying and carbonizing or turning to eschar.

    DIGITAL WAVEFORM GENERATION FOR ELECTROSURGICAL GENERATORS
    4.
    发明专利
    DIGITAL WAVEFORM GENERATION FOR ELECTROSURGICAL GENERATORS 未知

    公开(公告)号：CA2220909A1

    公开(公告)日：1996-12-12

    申请号：CA2220909

    申请日：1996-06-03

    Applicant: VALLEYLAB INC

    Inventor： KLICEK MICHAEL S ,  SODNICAR MATTHEW J

    IPC: A61B18/12 ,  A61B17/39

    Abstract: An electrosurgical generator (10) has an improved design for generating outp ut waveforms using a microprocessor (15). The waveforms are generated in the fo rm of a serial digital output from the microprocessor (15). The serial digital output is transformed into an electrosurgical RF output in an amplifier stag e. The improved design also includes a monitoring circuit to continuously monit or the serial digital output by time-averaging the output, and then comparing that value with a threshold. The electrosurgical generator (10) comprises a microprocessor (15), an algorithm in the microprocessor (15) capable of toggling an output port of the microprocessor (15), an output amplifier (16) , an adjustable high voltage DC power supply (17), a patient circuit including an active electrode (12) and a return electrode (13). The electrosurgical generator (10) may further comprise a mode selector (20) for selecting one o f a plurality of pulse patterns in the serial digital output, and a plurality of command sequences in the algorithm, where each command sequence is designed to produce one of the plurality of patterns. There may also be a tank damp circuit (22) for reducing the amplitude of voltage spikes in the electrosurgical output, and a pulse suppression circuit. The monitoring circuit comprises a low pass filter (19) and a comparator to verify operatio n of the waveform generator.

    GENERACION DIGITAL DE FORMAS DE ONDA PARA GENERADORES ELECTROQUIRURGICOS.
    5.
    发明专利
    GENERACION DIGITAL DE FORMAS DE ONDA PARA GENERADORES ELECTROQUIRURGICOS. 未知

    公开(公告)号：MX9709905A

    公开(公告)日：1998-03-29

    申请号：MX9709905

    申请日：1997-12-08

    Applicant: VALLEYLAB INC

    Inventor： KLICEK MICHAEL S ,  SODNICAR MATTHEW J

    IPC: A61B17/39

    Abstract: Un generador electroquirurgico tiene un diseño mejorado para generar formas de onda de onda de salida usando un microprocesador; las formas de onda son generadas en forma de una salida digital en serie del microprocesador; la salida digital en serie se transforma a una salida electroquirurgica de radio frecuencia en una etapa amplificadora; el diseño mejorado incluye también un circuito para monitorear para monitorear continuamente la salida digital en serie promediando en tiempo la salida y comparar después ese valor por un umbral; el generador electroquirurgico comprendeun microprocesador, un algoritmo en el microprocesador capaz de conmutar una puerta de salida del microprocesador un amplificador, un suministro de energía de corriente directa y alto voltaje ajustable; el circuito al paciente incluyendo un electrodo activo y un electrodo de retorno; el generador electroquirurgico puede comprender además un selector de modos para seleccionar uno de una multitud de patrones de pulso en la salida digital en serie y una multitud de secuencias de mando en el algoritmo, en donde cada secuencia de mando está diseñada para producir uno de un multitud de patrones; puede haber también un circuito amortiguador de tanquepara reducir la amplitud de los picos de voltaje en la salida electroquirurgica y un circuito de supresion de pulsos; el circuito para monitorear comprende un filtro de paso bajo y un comparador para verificar la operacion del generador de formas de ondas.

    DIGITAL WAVEFORM GENERATION FOR ELECTROSURGICAL GENERATORS
    7.
    发明专利
    DIGITAL WAVEFORM GENERATION FOR ELECTROSURGICAL GENERATORS 未知

    公开(公告)号：CA2220909C

    公开(公告)日：2001-02-27

    申请号：CA2220909

    申请日：1996-06-03

    Applicant: VALLEYLAB INC

    Inventor： KLICEK MICHAEL S ,  SODNICAR MATTHEW J

    IPC: A61B18/12 ,  A61B17/39

    Abstract: An electrosurgical generator (10) has an improved design for generating output waveforms using a microprocessor (15). The waveforms are generated in the form of a serial digital output from the microprocessor (15). The serial digital output is transformed into an electrosurgical RF output in an amplifier stage. The improved design also includes a monitoring circuit to continuously monitor the serial digital output by time-averaging the output, and then comparing that value with a threshold. The electrosurgical generator (10) comprises a microprocessor (15), an algorithm in the microprocessor (15) capable of toggling an output port of the microprocessor (15), an output amplifier (16), an adjustable high voltage DC power supply (17), a patient circuit including an active electrode (12) and a return electrode (13). The electrosurgical generator (10) may further comprise a mode selector (20) for selecting one of a plurality of pulse patterns in the serial digital output, and a plurality of command sequences in the algorithm, where each command sequence is designed to produce one of the plurality of patterns. There may also be a tank damp circuit (22) for reducing the amplitude of voltage spikes in the electrosurgical output, and a pulse suppression circuit. The monitoring circuit comprises a low pass filter (19) and a comparator to verify operation of the waveform generator.

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