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Evaluation of normal erectile function with color flow Doppler sonography.

A N Schwartz¹, K Y Wang, L A Mack

¹Department of Radiology, University of Washington School of Medicine, Seattle 98195.

AJR. American Journal of Roentgenology

|December 1, 1989

Summary

Color flow Doppler sonography reveals distinct penile artery velocity patterns during normal erection. These vascular changes, measured by systolic/diastolic velocities and waveforms, correlate with increasing intracorporal pressure, aiding in assessing erectile function.

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Area of Science:

Urology
Vascular Physiology
Medical Imaging

Background:

Understanding the vascular dynamics of normal penile erection is crucial for diagnosing erectile dysfunction.
Previous methods lacked the resolution to dynamically assess blood flow changes during erection.

Purpose of the Study:

To investigate the vascular events during normal erection using color flow Doppler sonography.
To correlate penile arterial blood flow parameters with intracorporal pressure changes.

Main Methods:

Color flow Doppler sonography was performed on seven healthy subjects during induced erection.
Penile arterial systolic/diastolic velocities and spectral waveforms were analyzed.
Intracorporal pressure was monitored and correlated with blood flow parameters.

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Main Results:

A characteristic spectral waveform pattern was identified throughout the erectile cycle.
Systolic velocities increased initially and remained elevated until full erection.
Diastolic velocity decreased, reversed, and eventually ceased as intracorporal pressure rose.

Conclusions:

Color flow Doppler sonography effectively visualizes and quantifies dynamic erectile events.
Penile blood flow velocity and waveform changes are reliable indicators of cavernosal artery inflow and venous outflow occlusion.
This technique offers new insights into normal erectile physiology and aids in evaluating erectile function.