Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2005-12-14
2011-12-06
Chen, Tse (Department: 3777)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
C600S437000, C600S453000, C600S465000, C600S479000, C600S407000, C600S441000
Reexamination Certificate
active
08070684
ABSTRACT:
A method and apparatus for enhancing evaluation of valvular function in terms of regurgitation is described. The techniques include a method and apparatus for monitoring flow across a valve and evaluating regurgitation through the valve. An ultrasound scanner with Doppler capabilities processes and represents Doppler signal data in a color scale. The Doppler signal data is processed such that different colors are assigned to signals that have different power levels. An ECG signal may be correlated to the Doppler signals to determine systole and diastole periods, then the regurgitation is determined by estimating a peak reverse blood flow based on Doppler signals from blood at systole. The Doppler signals may also be processed so as to determine a cardiac cycle, then regurgitation is determined as the ratio of a reverse blood flow as a percentage of a forward blood flow.
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Brutus Joel F
Chen Tse
St. Jude Medical, Atrial Fibrillation Division, Inc.
The Marbury Law Group PLLC
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