Which test is used to assess micturition flow in men with suspected BPH?

• A. Postvoid residual measurement
• B. Uroflowmetry (maximum flow rate)
• C. Urinalysis
• D. Digital rectal exam

Answer: (B)

The test that directly measures how fast urine flows during voiding is uroflowmetry. In men with suspected BPH, an enlarged or obstructed prostate can narrow the flow path, reducing the peak flow rate (Qmax) and sometimes prolonging voiding. Uroflowmetry uses a special device to record the rate of urine flow in real time as the patient voids, providing objective figures such as Qmax and average flow. This makes it ideal for assessing micturition flow and gauging the degree of obstruction or response to treatment.

Postvoid residual measurement shows how much urine remains after voiding, urinalysis checks urine composition (infection, blood, crystals), and digital rectal exam estimates prostate size but does not quantify flow.