Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Reexamination Certificate
2005-04-18
2010-12-28
Le, Long V (Department: 3768)
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
C600S468000, C600S465000, C600S454000, C600S459000, C600S462000
Reexamination Certificate
active
07857763
ABSTRACT:
The invention uses a transducer and ultrasound system to form and direct ultrasound beams through the blood stream that will detect the Doppler shift in frequency between the beams and the return echo off the blood. The transducer can be secured onto the surface of the patient's skin with a transducer housing holder. A 1-D transducer, subject to an optimized angle with respect to the blood vessel, will generate and direct ultrasound beams electronically through a blood vessel below the skin and analyze the received echo, searching for the maximum signal amplitude of the Doppler frequency shift from the blood. Furthermore, the device continuously controls the direction of the ultrasound beams to achieve maximum return signal amplitude. Then, the condition and trend of the blood flow is recorded and displayed continuously over the desired diagnostic interval the device is in use.
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Brutus Joel F
Le Long V
Steres George M.
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