The accuracy of Doppler sonography in the evaluation of testicular tor
sion was tested in 65 boys (aged 0-18 years) with acute scrotal pain o
r swelling. All patients underwent pulsed Doppler sonography of both t
estes, followed by scintigraphy (n = 16) and/or surgery (n = 34) and a
close clinical follow-up for 4-8 months (n = 31). Color Doppler sonog
raphy was performed in 29 patients. The testicular artery was deemed p
atent if Doppler shifts from branches within the parenchyma could be f
ound. Surgery revealed 19 cases of testicular torsion, 17 of which wer
e diagnosed with Doppler sonography. There were six technical failures
, in which no signals could be found on either side. In four boys, no
color signals were obtained in either testis but subsequent examinatio
n with a mechanical sector scanner and pulsed Doppler sonography yield
ed arterial signals. Doppler sonography was successful in 59 of 65 boy
s (91%) and yielded a sensitivity of 89% and specificity of 100%. Puls
ed Doppler sonography with mechanical sector scanners was more sensiti
ve than color Doppler sonography. Intermittent torsion was missed both
with Doppler sonography and scintigraphy.