Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2008-03-04
2008-03-04
Layno, Carl (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
C600S512000
Reexamination Certificate
active
11201896
ABSTRACT:
Apparatus for assessing the electrical properties of patient-electrode interfaces has a carrier signal source injecting two carrier signals comprising an AC signal with a DC offset to the electrodes. The carrier signals are out of phase. The outputs from the electrodes are formed into electrocardiographic lead signals in a pre-amplifier circuit. Signal processing circuit is coupled to the pre-amplifier circuit and provides a first signal comprising the AC carrier signal contained in an ECG lead signal and a second signal containing a DC offset signal. The first and second signals are provided to a microprocessor to obtain an output indicative of the electrical properties of electrode interfaces for the ECG lead signal.
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Andrus Sceales Starke & Sawall LLP
The General Electric Company
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