Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1997-03-12
1999-04-20
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 46, 607 2, 607117, 607148, 600585, 600547, 606129, A61N 108
Patent
active
058954163
ABSTRACT:
The electric field steering assembly is used to control the size and/or location of, and/or steer the position of, an electric field in a living creature. The assembly comprises a pulse generator or stimulator, at least one implanted lead coupled to the stimulator and having, at a distal end thereof, at least three spaced apart electrodes, and electrical circuitry for adjusting the current and/or voltage at each electrode. The electrical circuitry is programmed to: 1) electronically change the size and/or location of an electric field established between the electrodes by independently programming the current flowing through of one or more anode (+) electrode(s) from one or more cathode (-) electrode(s), thereby steering the size and location of the electric field to recruit only target certain tissue and exclude unwanted tissue; and, 2) automatically change the voltage amplitude at each anode in response to changes in electrode impedance in order to maintain a constant anodic current, thereby preserving, for the duration of the therapy, the original electric field found to be effective at implant time.
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Barreras, Sr. Francisco J.
Jimenez Oscar
Kamm William E.
Medtronic Inc.
Schaetzle Kennedy J.
Vigil Thomas R.
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