Test | Arterial insufficiency | Venous leak | Psychogenic ED |
---|---|---|---|
NPTR | Poor erection | Good erection | |
ICI + stimulation | |||
Penile ultrasound | PSV < 30cm/s PSV < 60cm/s (sum of R + L) cavernous artery diameter < 0.7mm |
Normal PSV, EDV < 3cm/s RI ≤ 0.8 |
No abnormalities |
Cavernosometry | No abnormalities | Flow to maintain < 3mL/min IC pressure decay > 45mmHg in 30s |
|
Cavernosography | Venous drainage visualized | ||
CASOP | Brachial SBP - CASOP < 35mmHg | No abnormalities | |
Penile brachial index | PBI ≤ 0.7 |
Drug | Dosing | Onset | Avoid with fatty food | Headache/Dyspepsia/Flushing | Backache/Myalgias | Blurred/Blue Vision |
---|---|---|---|---|---|---|
Sildenafil (Viagra) | 25-100mg | 30-60min | Yes | Yes | Rare | Yes |
Tadalafil (Cialis) | 5-20mg | 60-120min | No | Yes | Yes | Rare |
Vardenafil (Levitra) | 5-20mg | 30-60min | Yes | Yes | Rare | Rare |