[THREE CASES OF FEMALE URINARY DYSFUNCTION DIAGNOSED BY URODYNAMIC STUDY AND VOIDING CYSTOURETHROGRAPHY ACCURATELY]

We performed a urodynamic study (UDS) and voiding cystourethrography (VCUG) or videourodynamics for three female patients with urinary dysfunction to differentiate between bladder outlet obstruction (BOO) and detrusor underactivity (DU). Case 1: A 72-year-old woman with a history of urinary retention and chief complaint of dysuria. UDS showed detrusor contraction (detrusor pressure at maximum flow: PdetQmax 86.6 cmH₂O) and low urinary flow (maximum flow rate: Qmax 2.2 ml/s). VCUG showed poor bladder neck opening and bilateral vesicoureteral reflux and we diagnosed BOO due to bladder neck dysfunction. Case 2: A 74-year-old woman with dysuria. UDS showed detrusor contraction (PdetQmax 27.7 cmH₂O) and low urinary flow (Qmax 5.3 ml/s). VCUG showed the open bladder neck and narrowing of the middle urethra during voiding. We diagnosed BOO due to abnormal urethral function during voiding. Case 3: An 85-year-old woman with a chief complaint of nocturia. UDS showed weak detrusor contraction (PdetQmax 18.3 cmH₂O) and low urinary flow (Qmax 3.8 ml/s). VCUG revealed urethral dilatation. We diagnosed DU. The combination of UDS and VCUG for female urinary dysfunction may be a useful tool for the differential diagnosis of DU and BOO.