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Abstract

Although penile duplex Doppler ultrasound studies have been well described for evaluating erectile dysfunction (ED), standardization of test methodology remains difficult. Moreover, the clinical correlation of ultrasound-derived vascular flow values for diagnosis and therapy of ED is not always straightforward. We report a relatively small series of Doppler studies to highlight a particular parameter, time to the maximum peak systolic velocity, not thoroughly addressed in previous studies. Editorial CommentUrologyVol. 75Issue 1PreviewThe authors propose the division of a small number of patients with ED with or without Peyronie disease into fast or slow responders based on time to maximum peak systolic velocity (PSV) obtained on a color duplex Doppler study. The slow responders had a higher eventual PSV and had a higher number of PSVs of 30 cm/s or higher. However, usefulness of this division for ramifications for classifying ED characteristics of the 2 groups was not present. Certainly, the value of this well-written study is the lesson for necessity to follow-up patients beyond 10 minutes for obtaining maximum systolic velocity. Full-Text PDF Longer Time to Peak Flow Predicts Better Arterial Flow Parameters on Penile Doppler UltrasoundUrologyVol. 75Issue 1PreviewTo review the associations between measured variables in Penile Doppler ultrasound procedures. Penile Doppler ultrasound is useful in the evaluation of erectile dysfunction, but there is no uniform standard of performing the procedure. It is generally believed that a peak systolic velocity > 30 cm/s, minimal venous leak, and resistive index > 0.8 are essential for adequate erection. While the arterial parameters are well studied, data on the predictive value of time to peak flow are lacking. Full-Text PDF