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To treat John's dysfunctional voiding and improve bladder flow, the Urodynamics team uses biofeedback therapy - a series of exercises and techniques to teach patients how to control their sphincter muscle.

Nurses also place surface electrodes on John to detect muscle activity using a special software program that includes fun, yet challenging exercises. Similar to playing a video game, John is challenged to tighten and relax his sphincter muscle in order to launch and land computer-generated rocket ships and open and close blooming flowers.

"At first, we challenged him to hold it in for 15 minutes, then 30 minutes," says Cynthia Graziano, RN, CPN. Later, we would ask him - John, do you realize that you held it in for one hour?"

Left: John demonstrates how he uses a ball to improve muscle relaxation. This technique is usually done in a seated position.