Vacuum Erection Devices (VED)
VEDs are a useful noninvasive treatment for ED. They involve a cylindrical device that is placed over the penis. A VED, which mechanically creates penile blood engorgement, consists of a vacuum chamber or cylinder, a pump to produce negative pressure, and constriction rings. After the penis and constriction rings are coated with water-soluble lubricant and the rings are loaded onto the cylinder base, the cylinder is placed over the penis with the base held firmly against the pubis to maintain a seal. The pump is then activated to slowly create negative pressure, or a vacuum, inside the cylinder, which draws blood into the corpora cavernosa, producing an erection. Once the penis is engorged, the constriction band is pulled from the cylinder onto the base of the penis. The negative pressure is released through a valve, and the cylinder is removed. It takes an average of 2 to 2½ minutes to create an erection through this procedure, according to recent reviews.