Topic Overview The post-void residual (PVR) urine test measures the amount of urine left in the bladder after urination. The test is used to help evaluate: • Incontinence (accidental release of urine) in women and men. • Urination problems. • An enlarged prostate. The amount of leftover (residual) urine can be measured by draining the bladder with a thin flexible tube (catheter) or by using ultrasound. The catheter method has a slight risk of causing infection or injury to the tube leading from the bladder (urethra).

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But the catheter method is safe when done carefully. And it may be less expensive than ultrasound.