Tests for Erection Problems
How It Is Done continued...
While you sit or stand, your
penis will be cleaned with a special soap. Then your doctor will inject a
medicine into the side of your penis with a small needle. After the medicine is
injected, your doctor may massage the penis for a few seconds to help spread
the medicine in the penis. Some doctors may use a band that is gently tightened
around the base of the penis for 5 minutes after the medicine is given to make
sure an erection occurs.
A low dose of the medicine is used at
first. If the low dose does not cause an erection, then a larger dose may be
used. An erection should occur within 5 to 10 minutes after the medicine is
The medicine may also be given in a thin tablet that is put
in the urethra.
After the medicine is given, you may be asked to
watch sexually stimulating movies or to massage your penis to cause an
erection. Your doctor will measure how rigid and how long the erection lasts.
After the test, your doctor may inject a second medicine to make sure your
erection goes away.
The Doppler ultrasound test is
done by a urologist or ultrasound technician.
You will lie down on
an examination table. Your doctor may need to inject a medicine or use a soft
band around the penis to cause an erection to see blood flow through the
How It Feels
Nocturnal penile tumescence (NPT) test
penile tumescence (NPT) test does not cause any discomfort, but you may feel
embarrassed about doing the test. Remember that it's important to find the
cause of your inability to have an erection and you don't need to feel
embarrassed about the test.
Intracavernosal injection test
intracavernosal injection test, you will feel a sharp, stinging pain in your penis from the needle. If you feel a burning or aching pain during
the erection, tell your doctor immediately.
The ultrasound does not cause
any pain. If you get a medicine or device during the test to cause an erection,
you may feel embarrassed and the shot may hurt.