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Real-Time Spectral Analysis of Brachial Doppler Signals in Neonates with Patent Ductus Arteriosus

Department of Pediatrics, Children's Hospital, 700 Children's Drive, Columbus, OH 43205.

John Wheller, MD

Randy R. Miller, MD

Mohammed Bashiru, MS

Department of Pediatrics, Columbus Children's Hospital and The Ohio State University, Columbus, Ohio.

Twenty-three Doppler examinations of the brachial artery were performed on 10 infants with patent ductus arteriosus (PDA). The continuous-wave (CW) zerocrossing recordings were compared with the waveforms obtained from spectral analysis (SA) of the audio signal from the CW flowmeter by means of the pulsatility index (PI). The CWPI correlated well with the SAPI (r = 0.89, P < 0.001). The patients were easily grouped into those infants who were normal or had clinically insignificant PDA's from those with a significant PDA using the PI. Although spectral analysis can detect and prevent sampling artifacts, the CW zero-crossing detector provided clinically-useful information.

Key Words: Doppler • pulsatility index • patent ductus arteriosus

Journal of Diagnostic Medical Sonography, Vol. 3, No. 3, 131-135 (1987)
DOI: 10.1177/875647938700300304


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