1) The other diagnostic methods, which are more invasive than NPT test, are color Doppler sonography, dynamic cavernosometry, and cavernosography.
Predictive value of patient history and correlation of nocturnal penile tumescence, colour duplex Doppler ultrasonography and dynamic cavernosometry and cavernosography in the evaluation of erectile dysfunction.
Specialised tests for assessing aetiology include nocturnal penile tumescence and rigidity, dynamic duplex ultrasound, dynamic infusion cavernosometry
, cavernosography internal pudendal arteriography and biothesimetry.
If the ultrasound is abnormal, however, arteriography and dynamic infusion cavernosometry
and cavernosography should be performed only in patients who are potential candidates for vascular reconstructive surgery--these tests though are rarely used in current Canadian ED treatment.
In all ED patients, we advise vasoactive drugs injection in corpus spongiosum in office, before color Doppler sonography of penis as well as cavernosography and cavernosometry
, also Rigiscan as needed.
While a number of methods have been developed to test erectile function (nocturnal penile tumescence testing, duplex Doppler blood flow recordings of the penile arteries, dynamic infusion cavernosometry
for assessment of venous outflow, office-based trial with an injectable intracavernosal agent), these are unlikely to be used routinely by primary care physicians.