Introduction: Video urodynamic study (VUDS) with clinical correlation helps in diagnosing primary bladder neck obstruction (PBNO) in women. Bladder neck incision/bladder neck resection (BNR) though effective is not commonly practiced for the fear of complications and limited literature available.
Methods: The records of ten women diagnosed with PBNO between 2017 and 2019 were reviewed and data pertaining to their clinical features, laboratory results, findings on abdominal ultrasonography, uroflowmetry, and VUDS was noted. Type of operative procedure performed and outcomes on follow-up were also assessed.
Results: Out of ten patients, two presented with lower urinary tract symptoms (LUTS), three with voiding LUTS and chronic retention and five had acute urinary retention. Mean serum creatinine was 3.4 mg/dl. In those able to void, mean maximum flow rate (Q max) was 7 ml/sec, and mean postvoid residual volume (PVR) was 360 ml. On VUDS, mean detrusor pressure at maximum flow (pdet@Qmax) was 54.2 cm of H20. Three patients opted conservative treatment and 7 had a successful surgical outcome with mean Q max of 26.2 ml/s (range: 13.9-41 ml/s), insignificant PVR and resolution of renal failure. Patients with pdet@Qmax <20 cm H2O (n = 3, mean 18.3 cm H2O) did equally well as compared to those with pdet@Qmax >20 cm H2O (n = 4, mean 93 cm H2O). None of the patients developed any complications on follow-up.
Conclusions: Clinical assessment supported with VUDS correlation holds a key in identifying patients with PBNO. BNR is a safe and effective treatment of PBNO in women who fail or are not candidates for conservative treatment.
Keywords: Bladder neck resection; female bladder outlet obstruction; primary bladder neck obstruction; urodynamic studies.
Copyright: © 2022 Urology Annals.