Discomfort disappears when the test is finished. Saline solution or sterile water. Description of test You or a close relative will be required to sign a consent form after the procedure has been explained to you. Catheter is passed into the urethra, then into the bladder. 30ml of room-temperature salt solution is injected into the bladder.
Bladder is drained.
Catheter is connected to the cystometer. Salt solution or carbon dioxide gas is slowly introduced into the bladder under control of the cystometer. Report when you first feel the urge to void. Bladder is filled to capacity. Bladder is drained through the catheter.