What is a uroflow study and what information does it provide?

• A. Noninvasive test measuring peak flow rate and flow pattern during voiding; helps assess obstruction and detrusor function
• B. Invasive test measuring bladder pressures
• C. Urinalysis results
• D. X-ray imaging of the urinary tract

Answer: (A)

Uroflow study, or uroflowmetry, is a noninvasive test that records the rate of urine flow as you void. A sensor measures how quickly urine leaves the bladder over time, producing the peak flow rate (the highest instantaneous flow) and a flow pattern chart. This information helps clinicians judge how well the bladder and its outlet are functioning. A normal or high peak flow with a smooth pattern usually suggests normal detrusor function and no obstruction. A reduced peak flow or an abnormal flow pattern (such as interrupted or plateaued flow) can indicate bladder outlet obstruction, urethral narrowing, or weaker detrusor contractions. The test does not measure bladder pressures (that requires invasive urodynamic testing), nor does it provide urinalysis results or imaging of the urinary tract.