Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2005-12-21
2010-11-09
Nasser, Robert L (Department: 3735)
Surgery
Diagnostic testing
Cardiovascular
C600S485000, C600S500000, C600S529000
Reexamination Certificate
active
07828739
ABSTRACT:
A method and apparatus are described for utilizing a source of vascular pulse waveform data from a patient for the purpose of measuring pulsus paradoxus. The arterial pulse waveform data source described is a pulse oximeter plethysmograph but can be any similar waveform data source, including an intra-arterial transducer, external blood pressure transducer, or plethysmograph. Through incorporation of measurements of values, such as an area under a pulse waveform curve, that are time-domain functions of a change in amplitude of the pulse waveform over a duration of the waveform, embodiments of the present invention represent a significant improvement upon previously described methods of measuring pulsus paradoxus.
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McDermott Will & Emery LLP
Nasser Robert L
Precision Pulsus, Inc.
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