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Radiology, Vol 197, 427-431, Copyright © 1995 by Radiological Society of North America

ARTICLES

Quantitative Doppler assessment of acute scrotal inflammation

JM Brown, LW Hammers, JW Barton, CK Holland, LM Scoutt, JS Pellerito and KJ Taylor
Department of Radiology, Yale University School of Medicine, New Haven, CT 06520-8042, USA.

PURPOSE: To establish quantitative Doppler criteria for acute unilateral epididymitis and/or orchitis. MATERIALS AND METHODS: Triplex ultrasonography (US) was used to prospectively evaluate 31 patients with acute hemiscrotal pain and 15 asymptomatic control subjects. Morphology and perfusion were assessed, and peak systolic velocities (PSVs) were recorded. Ratios of PSV were calculated by using values from the right and left sides. RESULTS: PSVs in control subjects differed significantly from those in patients (P < .0001). A PSV > or = 15 cm/sec produced diagnostic accuracy of 90% for orchitis and 93% for epididymitis: Five of six false-negative findings were in patients younger than age 15 years. Epididymal PSV ratios > or = 1.7 or testicular ratios > or = 1.9 were diagnostic of acute inflammation (P < .0001). In three cases, morphologic and color Doppler findings were normal and only the PSV ratios were diagnostic. CONCLUSION: PSV and PSV ratios provide diagnostic criteria for acute unilateral epididymitis and/or orchitis that are more accurate than morphologic evaluation and color flow imaging either alone or in combination.


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