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公开(公告)号：IE921822A1
公开(公告)日：1992-12-16
申请号：IE921822
申请日：1992-07-01
Applicant: VALLEYLAB INC
Inventor： KLICEK MICHAEL S , ZIEVE DAVID A
Abstract: An electrical circuit system which provides electrical energy to a surgical apparatus having ultrasonic fragmentation, aspiration and electrosurgical coagulation capabilities, which system also includes an impedance sensing network and automatic feedback power output control to reduce RF power output as load impedance increases, thereby reducing RF leakage current.
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公开(公告)号：AU710400B2
公开(公告)日：1999-09-16
申请号：AU5700996
申请日：1996-06-03
Applicant: VALLEYLAB INC
Inventor： KLICEK MICHAEL S , SODNICAR MATTHEW J
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公开(公告)号：ES2125262T3
公开(公告)日：1999-03-01
申请号：ES92911387
申请日：1992-05-04
Applicant: VALLEYLAB INC , KLICEK MICHAEL S , ZIEVE DAVID A
Inventor： KLICEK MICHAEL S , ZIEVE DAVID A
Abstract: An electrical circuit system which provides electrical energy to a surgical apparatus having ultrasonic fragmentation, aspiration and electrosurgical coagulation capabilities, which system also includes an impedance sensing network and automatic feedback power output control to reduce RF power output as load impedance increases, thereby reducing RF leakage current.
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公开(公告)号：CA2229874A1
公开(公告)日：1997-04-03
申请号：CA2229874
申请日：1996-06-28
Applicant: VALLEYLAB INC
Inventor： BECKER DANIEL J , KLICEK MICHAEL S
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.
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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
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.
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Patent Agency Ranking56.发明专利
公开(公告)号：AU672227B2
公开(公告)日：1996-09-26
申请号：AU4858893
申请日：1993-09-17
Applicant: VALLEYLAB INC
Inventor： BROADWIN ALAN , KLICEK MICHAEL S , KREIZMAN ALEXANDER S , OLICHNEY MICHAEL D , ROSE EMERY S
Abstract: An ultrasonic oscillator drives a tool at a set frequency. An amplitude control runs the oscillator to set the vibration level. A frequency regulator joins the amplitude and the oscillator. A control feedback loop, in the frequency regulator, keeps handpiece linear dynamics. An operational transconductance amplifier, in the oscillator, governs gain of the loop. A circuit connects to the control to retard the rate of current application over time to the amplifier. The circuit has switching to either retard the rate or reset for start up. The amplifier is a current output device with current directly proportional to the bias current and input voltage with bias as gain change for the loop. The circuit limits the bias to the amplifier to modify frequency response and output current. A capacitor delays application of the bias to the amplifier. Replaceable tools of various lengths or shapes positioned along an axis vibrate for surgery at the frequency and a wave length. Tools longer than one wavelength and of configurations tuned to oscillate around the frequency resonate as a function of their material, length and configuration. A flue surrounds the tool and has a hollow elongate semi rigid central body about an axis with a funnel, at one end thereof and a nozzle, at the other to direct annular irrigant/coolant flow therethrough. The funnel and nozzle are resilient. Reinforcing ridges, inside the nozzle, act to maintain concentricity between the flue and nozzle tip and channel irrigant thereabout.
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公开(公告)号：FI961530A
公开(公告)日：1996-04-04
申请号：FI961530
申请日：1996-04-04
Applicant: VALLEYLAB INC
Inventor： KLICEK MICHAEL S
Abstract: An electrosurgical generator control responds to tissue impedance between active and return electrodes during desiccation. Active and return generator leads to supply energy and a user control sets the level of energy desired for electrosurgery. Voltage and current sensing circuits respond to high frequency energy in the leads to signal voltage and current in the leads. A multiplier receives the signals to calculate power. A clock sets units of time during for which power calculation. An integrator calculates the energy supplied through the leads per time unit. The user control sets a reference signal for the energy level desired. A correlation circuit receives the energy calculations from the integrator and the reference signal and provides a feedback signal to indicate when the energy calculation equals the user control setting for altering the generator supply of energy to the leads. A counter assesses the number of packets of energy delivered against a setting of the user control and the total energy delivered is a function of multiple packet sequences containing pulses wherein the time between the pulses is controlled by the user control. The method uses the automatic control in measuring impedance during tissue desiccation and altering the output of an electrosurgical generator.
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公开(公告)号：AU1391395A
公开(公告)日：1995-10-09
申请号：AU1391395
申请日：1995-01-23
Applicant: VALLEYLAB INC
Inventor： KLICEK MICHAEL S
Abstract: An active electrode switches from a monopolar mode extending from a handpiece and a patient return to a bipolar mode with the active and return electrodes extending. An active lead selectively connects the active output and the active electrode. A return lead selectively connects the return electrode and the return output in the monopolar mode or the return terminal when in the bipolar mode. Terminals connect with wiring to the electrodes to complete the circuit for the bipolar mode. One terminal is on the generator and one is in the handpiece to connect to the electrodes and complete the circuit for bipolar. The electrode has a control on the handpiece for the surgeon to change circuitry and to position the electrode for each mode. The return electrode in the monopolar mode is in the handpiece disconnected from its terminal. The return electrode connects to its terminal when extended from the handpiece but for monopolar a pair of patient pads connected to a monitoring circuit test continuity. A method of use has steps of switching the electrode from the monopolar to bipolar, providing the generator with outputs to the electrodes, having terminals for the electrodes when used for bipolar, including an active lead selectively in circuit between the active output and electrode and including a return lead selectively in circuit between the return electrode and output when monopolar or the terminal when bipolar.
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公开(公告)号：FI946163A
公开(公告)日：1995-07-01
申请号：FI946163
申请日：1994-12-29
Applicant: VALLEYLAB INC
Inventor： KLICEK MICHAEL S , TRUDEL GREGORY J
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公开(公告)号：AU660467B2
公开(公告)日：1995-06-29
申请号：AU1914792
申请日：1992-05-04
Applicant: VALLEYLAB INC , KLICEK MICHAEL S , ZIEVE DAVID A
Inventor： KLICEK MICHAEL S , ZIEVE DAVID A
Abstract: An electrical circuit system which provides electrical energy to a surgical apparatus having ultrasonic fragmentation, aspiration and electrosurgical coagulation capabilities, which system also includes an impedance sensing network and automatic feedback power output control to reduce RF power output as load impedance increases, thereby reducing RF leakage current.
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