Uroflowmetry

Uroflowmetry is the simplest and most commonly prescribed urodynamic test. It consists of measuring the urinary flow rate during voiding using an electronic flowmeter. The patient urinates into a measuring device that records in real time the volume of urine passed per unit of time. This test produces a characteristic voiding curve that provides information on the maximum flow rate (Qmax), the average flow rate, the voided volume and the voiding time. These parameters are essential for assessing bladder and sphincter function and detecting bladder outlet obstruction. Uroflowmetry is particularly useful in screening for benign prostatic hyperplasia in men, urethral strictures and bladder dysfunction. It is often the first test performed before considering a more comprehensive urodynamic assessment. The results are interpreted according to age, sex and voided volume. A maximum flow rate below 15 ml/s in men or 20 ml/s in women is generally considered abnormal and warrants further investigation.