how not to be deceived by buying cialis online canadian cialis for sale During the session, the counselor will give the patient "assignments" to do at home, such as: Cavernosography measurement of the vascular pressure in the corpus cavernosum. Saline is infused under pressure into the corpus cavernosum with a butterfly needle, and the flow rate needed to maintain an erection indicates the degree of venous leakage. The leaking veins responsible may be visualised by infusing a mixture of saline and x ray contrast medium and performing a cavernosogram.[21] Vacuum pump