I was at my urologist and he did a ultrasound of my penis to see if i have good blood flow in my penis. He did an injection to my penis and i think it was caverject and my penis got very hard. He then told me my blood flow in my penis was good. However, he never tested my blood flow when my penis was flaccid. I have E.D problems because of a penis injury i had 4.5 years ago. People online tell me urologist should have tested my blood flow in penis when not erect. When i asked my urologist why we did not do this test, he tells me there is no point at all because most people would have very little blood flow in their penis when flaccid. Is this true?