Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1997-10-20
1998-12-01
Getzow, Scott M.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607122, A61N 1362
Patent
active
058431357
ABSTRACT:
A pacing system is provided having a lead with a pressure transducer or other sensor, the lead being characterized by having only a single conductor connecting the pacemaker with the signals from the sensor and the signals to and from the lead tip electrode. A connecting circuit mounted in the lead near the distal end is powered by a low level alternating constant current square wave to provide multiplexed signals on the conductor. The lead connecting circuit comprises a switching device connected to a sensor, such as a piezoelectric pressure transducer, so that for positive current pulses delivered to the lead, the transducer output is added in series with any cardiac signal sensed by the tip electrode; while for negative currents the pressure transducer is isolated and only the tip electrode signal information is connected back to the pacemaker. The pacemaker contains processing circuitry for decoding the respective cardiac signals and pressure signals from the multiplexed signals.
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Leinders Robert
Weijand Koen J.
Getzow Scott M.
Jaro Michael J.
Medtronic Inc.
Patton Harold
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