A semi-rigid prosthesis is a silicon-covered flexible metal rod. Once inserted, it provides the rigidity necessary for intercourse and can be curved slightly for concealment.
An inflatable penile prosthesis consists of two soft silicone tubes inserted in the penis, a small reservoir implanted in the abdomen, and a small pump implanted in the scrotum.
To produce an erection, a man pumps sterile liquid from the reservoir into the tubes by squeezing the pump in the scrotum. The tubes act as erectile tissue and expand to form an erection.
When the erection is no longer desired, a valve allows the fluid to return to the reservoir. Inflatable prostheses are the most natural feeling of the penile implants and they allow for control of rigidity and size.
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