Video Urodynamics

Video urodynamics (VUDS) is allows use of X-ray screening at key moments in real time, captured alongside the information on pressure and flow. VUDS can be helpful for evaluating an artificial urinary sphincter which is no longer functional, providing the device was charged with contrast when it was first placed. VUDS has a very important role to play in lower urinary tract assessment of neurological disease. In patients awaiting transplant who have oliguria or bladder dysfunction, urodynamics can often reveal significant pathology. The principle of the Whitaker test is to perfuse the upper urinary tract at a constant flow rate with saline or contrast medium from above downwards, through a nephrostomy tube, while recording the pressure in the renal pelvis. VUDS provides the additional anatomical information that can make a vital difference to understanding an individual patient's urinary tract dysfunction, of greatest value where pathophysiological mechanisms are varied and potentially complex.