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- W2008463642 abstract "Duplex ultrasonography combines a range-gated Doppler flowmeter with real time 2-dimensional ultrasound imaging to yield measurements of blood velocity and cross-sectional area. Flow is calculated using the equation F = V * A where V = velocity and A = cross-sectional area. To evaluate the validity of this technique we obtained measurements in an in vitro model of pulsatile flow (1) and in the dog using the carotid and brachial arteries. Flow calculations of mean peak flow were compared to direct (volumetric) measurements (n = 50) of mean flow in the in vitro model and indirect (surgically-placed electromagnetic flowmeter) measurements (n = 40) of mean flow in the dog. The correlation was 0.90 with the in vitro model and 0.80 with the dog model. We then measured mean peak blood flow in the anterior cerebral artery of 13 neonates through the anterior fontanelle. Flow ranged from 0.87 to 10.39 cc/min (mean 3.88 cc/min). We conclude that noninvasive measurement of blood flow with duplex ultrasonography is comparable to other established direct, invasive methods, and may be useful in the evaluation of the intracranial circulation in the neonate. 1. Miles, R.: Transmission of vibration from simulated arterial stenosis. Masters Thesis, Iowa State University, 1976." @default.
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- W2008463642 date "1984-04-01" @default.
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- W2008463642 title "MEASUREMENT OF MEAN PEAK BLOOD FLOW USING DUPLEX ULTRASOUND IN THE NEONATE" @default.
- W2008463642 doi "https://doi.org/10.1203/00006450-198404001-01452" @default.
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