Erection self-test

Alternative names:

nocturnal penile tumescence (NPT) stamp test

How the test is performed:

A strip of four to six stamps (any kind) is used for each test. The test needs to be done for three nights. The man needs to wear brief-type undershorts that have a fly. The penis is brought through the fly leaving most of the pubic hair against the body. The strip of stamps is wrapped snugly around the shaft of the penis. The stamps need to overlap so the overlapped stamp can be moistened to seal the ring. When the stamp has dried, the penis is carefully replaced inside the shorts. The shorts are worn to sleep in. (They help protect the stamps from falling off). In the morning, check to see if the stamp ring has been broken along the perforations. If the tearing of the stamps awakens the man during the night, check for an erection and how rigid the erection is.

How to prepare for the test:

The stamps need to be obtained. Do not drink alcohol or take a sleep-inducing or sedative medication for at least 2 days before the test is done.

How the test will feel:

The stamps may be felt as an unusual sensation.

Why the test is performed:

The test is done to confirm if the man is unable to maintain an erection at all. The test may be helpful in determining if the cause is psychologic or physical. During certain stages of sleep the man may have an erection without being aware of it.