Which non-invasive test is part of urodynamic evaluation?

• A. Uroflowmetry
• B. CT urography
• C. Serum lipid panel
• D. Pelvic ultrasound

Answer: (A)

The test that best fits a non-invasive assessment of how the bladder voids is uroflowmetry. This simple test measures the rate of urine flow and the timing during a single void, giving metrics like peak flow (Qmax) and voided volume without inserting instruments into the bladder. It helps gauge how efficiently the bladder empties and can point to issues like obstruction or weak detrusor muscle when the flow is abnormal. The other options are imaging or unrelated labs: CT urography visualizes anatomy with contrast and isn’t a functional bladder test; a serum lipid panel is unrelated to urinary function; pelvic ultrasound is an imaging study that can assess anatomy or estimate residual urine but doesn’t provide the flow/pressure data that characterize urodynamic testing.