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.

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：EP0678007B1

公开(公告)日：1998-09-23

申请号：EP92911387.6

申请日：1992-05-04

Applicant: VALLEYLAB, INC. ,  KLICEK, Michael S. ,  ZIEVE, David A.

Inventor： KLICEK, Michael, S. ,  ZIEVE, David, A.

IPC: A61B17/39 ,  A61B17/22

CPC classification number: A61B18/1206 ,  A61B17/22012 ,  A61B18/1233 ,  A61B2018/00702 ,  A61B2018/00875

Abstract: An electrical circuit system (1) which provides electrical energy to a surgical apparatus having ultrasonic fragmentation, aspiration and electrosurgical coagulation capabilities, which system also includes an impedance sensing network (10) and automatic feedback power output control to reduce RF power output as load impedance increases, thereby reducing RF leakage current.

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：EP0737045A1

公开(公告)日：1996-10-16

申请号：EP94929000.0

申请日：1994-10-26

Applicant: VALLEYLAB, INC.

Inventor： KLICEK, Michael, S. ,  TRUDEL, Gregory, J.

IPC: A61B18 ,  A61B17 ,  A61M1

CPC classification number: A61B18/14 ,  A61B17/320068 ,  A61B18/1402 ,  A61B2017/320084 ,  A61B2217/005 ,  A61B2217/007

Abstract: An ultrasonic oscillator drives a tool at a set frequency. An amplitude control (47) runs the oscillator to set the vibration level. A frequency regulator (48) joins the amplitude and the oscillator. A handpiece supports a tranducer and a vibrating tool. A flue (17) surrounds the tool. Electrodes (42) associated with the flue (17) and/or the tool extend to be at or near the distal tip (18) of the tool and/or the flue (17) and provide bipolar electrosurgery with or without ultrasonic vibration of the tool. A method of performing ultrasonic surgery and bipolar electrosurgery has an ultrasonic handpiece with bipolar electrodes (42) associated with the tool or the flue (17).

公开(公告)号：EP0722297A1

公开(公告)日：1996-07-24

申请号：EP94924977.0

申请日：1994-09-09

Applicant: VALLEYLAB, INC.

Inventor： KLICEK, Michael, S.

IPC: A61B18

CPC classification number: A61B18/1206 ,  A61B2018/00702 ,  A61B2018/00755 ,  A61B2018/00761 ,  A61B2018/00779 ,  A61B2018/00827 ,  A61B2018/00875 ,  A61B2018/00892

Abstract: An electrosurgical generator (11) control responds to tissue impedance between active and return electrodes (12 and 13) during desiccation. Active and return generator leads supply energy (25) and a user control (16) sets the level of energy (25) desired for electrosurgery. Voltage and current sensing circuits (19) respond to high frequency energy (25) in the leads to signal voltage and current in the leads. A multiplier (21) receives the signals to calculate power. A clock (23) sets units of time during which power calculation. An integrator (24) calculates the energy (25) supplied through the leads per time unit. The user control (16) sets a reference signal (26) for the energy (25) level desired. A correlation circuit (27) receives the energy (30) calculations from the integrator (24) and the reference signal (26) and provides a feedback signal (28) to indicate when the energy (25) calculation equals the user control (16) setting for altering the generator supply of energy (25) to the leads. A counter (38) assesses the number of packets of energy (40) delivered against a setting of the user control (16) and the total energy (25) delivered is a function of multiple packet sequences containing pulses wherein the time between the pulses is controlled by the user control (16). The method uses the automatic control (10) in measuring impedance during tissue desiccation and altering the output of an electrosurgical generator (11).

公开(公告)号：EP0722296A1

公开(公告)日：1996-07-24

申请号：EP94924973.0

申请日：1994-09-09

Applicant: VALLEYLAB, INC.

Inventor： KLICEK, Michael, S.

IPC: A61B18 ,  A61B17

CPC classification number: A61B18/1206 ,  A61B18/1233 ,  A61B18/1402 ,  A61B18/1442 ,  A61B2017/00101 ,  A61B2018/0016 ,  A61B2018/00702 ,  A61B2018/00791 ,  A61B2018/00797 ,  A61B2018/00827 ,  A61B2018/00875 ,  A61B2018/00892 ,  A61B2018/1253 ,  A61B2018/126

Abstract: In an ESV a control system responds to impedance and temperature as sensed between and at the electrodes (13) during desiccation each of such electrodes being provided separately and independently through a suitable multiplexer with a specifically controlled RF power. An instantaneous impedance monitor senses impedance variations and controls by means of specific derivative sensitive algorithm part of a feedback loop, the output power delivered through each electrode. A further temperature dependent feedback loop power control system is operative in a multiplexed mode in pair with the above impedance feedback system. Such second system uses an array of temperature sensors placed in the immediate proximity of the each tissue contacting electrode, and an appropriate derivative sensitive algorithm. Both systems are operated in a multiplex mode through a first multiplexer. A second multiplexer shifts the output power to the various electrodes independently and separately.

公开(公告)号：EP0649290A1

公开(公告)日：1995-04-26

申请号：EP93905958.0

申请日：1993-02-18

Applicant: VALLEYLAB, INC.

Inventor： KLICEK, Michael, S.

IPC: A61B18 ,  A61B17 ,  A61M13

CPC classification number: A61B18/1487 ,  A61B17/00234 ,  A61B17/34 ,  A61B17/3474 ,  A61B18/1402 ,  A61M13/003

Abstract: An electrosurgical tubular trocar system (10) has a hollow tube (13) substantially longer than its diameter. The tube (13) is shaped for insertion in a direction generally along its axis through tissue of a human or animal body. Distal and proximal ends (17 and 18) on the tube (13) enter and remain outside the tissue, respectively. A tip (19) on the distal end (17) punctures tissue of a human or animal. An insulating portion (20) of high dielectric material extends along the tube (13) between the distal and proximal ends (17 and 18). An electrode (14) on the insulating portion (20) extends from the proximal end (18) to the tip (19) to transmit radio frequency energy. A tip point (19) at an acute angle to the axis lessens the initial force necessary for entry of the tube (13). The return path (16) is a conductor (23) on the insulating portion (20) for bipolar cutting across a gap (25). An alternate system may have the return path (16) as a conductive pad (15) in contact with the tissue as a monopolar circuit. The tube (13) may be in fluid communication for flow.