Test Overview
Cystometry is a test that measures the pressure inside of the
to see how well the bladder is working.
Cystometry is done when a muscle or nerve problem may be causing problems with
how well the bladder holds or releases urine.
Urination is a
complex process. As the bladder fills, nerves in the bladder wall send a
message to the
that you need to urinate. In response, your spinal cord
sends a signal for the bladder to contract (voiding reflex). When you hold in
your urine, your brain is overriding this reflex. When you allow the reflex to
occur, urination occurs. A problem affecting this nerve pathway or the muscles
of the bladder wall can cause bladder dysfunction.
During
cystometry, your bladder is filled with water or gas to measure its ability to
hold in and push out the water or gas. Medicine may also be given to see
whether your bladder contracts or relaxes normally in response to the medicine.
A small tube (catheter) can be placed in your
to measure pressure as the bladder fills. A
small pad or needle may be placed near your
to measure muscle function in this area.