Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1996-12-18
1998-09-01
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 8, A61N 137
Patent
active
058004629
ABSTRACT:
An electrotherapy circuit administers to a patient a current waveform. The electrotherapy circuit includes a charge storage device, at least two discharge electrodes connected by electrical circuitry to opposite poles of the charge storage device, a sensor that senses a patient-dependent electrical parameter (such as a patient impedance sensor), and a control circuit. The control circuit is connected to the sensor and the charge storage device and controls discharge of the charge storage device through the electrodes. The discharge of the charge storage device includes a current waveform having a sensing pulse portion, with insufficient energy for performing therapy, during which the sensor senses a patient-dependent electrical parameter (such as patient impedance), and a therapeutic discharge portion, with sufficient energy for performing therapy, having an initial discharge current controlled by the control circuit based on the patient-dependent electrical parameter (such as patient impedance) as sensed by the sensor. The sensing pulse portion has a discharge current that is at least about one-third of the initial discharge current of the therapeutic discharge portion.
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Ayati Shervin
Lopin Michael L.
Evanisko George R.
Kamm William E.
ZMD Corporation
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