Other Common Procedures
What This Test Is For
Penile duplex ultrasound is a non-invasive diagnostic test used to evaluate blood flow in the penis. It helps identify vascular causes of erectile dysfunction (ED), assess priapism, and monitor recovery after penile surgery or trauma.
Who Should Consider It
This test is recommended for men with erectile dysfunction of unknown cause, suspected vascular disease, penile trauma, Peyronie’s disease, or those preparing for penile prosthesis surgery. It is also used to evaluate prolonged erections (priapism).
What to Expect During the Procedure
You will lie in a comfortable position while ultrasound images are taken at baseline. In many cases, a small dose of medication is injected into the penis to produce an erection, allowing measurement of peak arterial flow and venous function. The procedure typically takes 20–30 minutes.
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How to Prepare
No fasting is required. Avoid erectile medications (Viagra, Cialis) 24 hours before the test. If a pharmacologic erection is planned, do not use nitrates and arrange transportation, as the erection may take time to subside before leaving.
Understanding Your Results
Results may show normal blood flow, arterial insufficiency (reduced inflow), or venous leak (poor blood retention). These findings guide personalized treatment options for ED.
Risks & Safety
The test is very safe. Rare risks include temporary discomfort, minor bruising, or prolonged erection requiring medication reversal.
Results & Follow-Up
A detailed medical report is reviewed with you within 24–48 hours and shared with your referring physician if needed.
frequently asked questions
Get answers to common questions about urology and men’s health
Is it painful?
Mild discomfort may occur during the injection, but it is well tolerated.
Do I need a driver?
Only if an injection is used to induce an erection.
How soon will I get results?
Typically within 1–2 days.