A cystometrogram tests the pressure inside the bladder. It helps your
doctor find out whether your bladder is contracting (squeezing)
on its own and if so, how well. It also measures how much urine your bladder
can hold. Your doctor uses this information to help figure out the
correct bladder management program for your
spinal cord injury.
A small catheter is placed in your bladder and connected to a
machine. The machine will insert water or carbon dioxide gas into your bladder.
You will tell your doctor when you can feel your bladder beginning
to fill or other bladder pressure. Your doctor will also want to
know when you feel you have to urinate and when you can no longer "hold it." At
the same time, your bladder pressure and how much your bladder can hold is measured and
put on a graph.