Normal values vary depending on age and sex. In men, urine flow declines with age. Women have less change with age:
Results are compared with your symptoms and physical exam. A result that may need treatment in one patient may not need treatment in another patient.
Several circular muscles normally regulate urine flow. If any of these muscles becomes weak or stops working, you may have an increase in urine flow or urinary incontinence.
If there is a bladder outlet obstruction or if the bladder muscle is weak, you may have a decrease in urine flow. The amount of urine that remains in your bladder after urinating can be measured with ultrasound.
Your health care provider should explain and discuss any abnormal results with you.
Peterson AC, Webster GD. Urodynamic and videourodynamic evaluation of voiding dysfunction. In: Wein AJ, ed. Campbell-Walsh Urology. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 58.
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