Urodynamic analysis of W shape orthotopic ileal neobladder following radical cystectomy

Abstract

Objective To evaluate the urodynamic parameters of shape orthotopic ileal neobladder during a 36-month follow-up post-operatively.Methods Forty-five consecutive patients underwent radical cystectomy and W shape ileal neobladder substitution for muscle-invasive bladder cancer were recruited.Follow-up and urodynamic evaluation were performed at 12 and 36 months after surgery.Cystourethrography,ultrasonography,IVU and renal function test were performed during the follow-up.Results Of the 45 patients,3 were dead during the follow-up because of cancer-related causes.When comparing to the 12-and 36-month urodynamic parameters,Qmax,MCC,compliance,end-filling pressure,peak flow pressure and PVR respectively were 15.6 ± 2.3 ml/s and 14.9 ± 1.9 ml/s,588.0 ± 264.6 ml and 561.0 ±197.4 ml,27.6±8.4 ml/cm H2O and 29.5 ±1.7 ml/cm H2O,24.4 ±5.2 cm H2O and 33.0 ±6.8 cmH2O,60.7 ±18.0 cm H2O and 79.9 ±28.2 cm H2O,83.5±24.4 ml and 80.4 ±26.8 ml.At early and late evaluation,daytime continence rate was 90％ and 94％,night continence rate was 48％ and 74％.Conclusions Orthotopic shape ileal neobladder was proven to maintain an adequate capacity and low pressure during a 36-month period of follow-up.The urodynamic results support this urinary diversion as a valid treatment option for muscle-invasive bladder cancer. Key words: Urodynamic; Bladder neoplasmas; Ileal neobladder