What does uroflowmetry measure?

What does uroflowmetry measure?

• A. Urine flow rate during voiding
• B. Glomerular filtration rate
• C. Ureteral patency
• D. Renal function

Answer: (A)

Uroflowmetry focuses on how fast urine comes out when you urinate. It records the flow of urine over time during voiding and gives numbers like the peak flow rate (the fastest point), the average flow, and the total voided volume, often shown as a flow–time curve. This helps tell whether there’s obstruction in the lower urinary tract or weak detrusor muscle, based on the shape and height of the curve.

The other options don’t fit because they measure different aspects of the kidneys or urinary tract: glomerular filtration rate reflects overall kidney filtration function, not the rate of voiding; ureteral patency concerns the ureter’s openness and is assessed by imaging or other tests, not by measuring flow during bladder emptying; renal function is a general term for kidney performance and isn’t specifically about urine flow during voiding.