Predictors of successful trial without catheter following acute urinary retention in benign prostatic enlargement: A single centre, multivariate analysis.

OBJECTIVE

To evaluate the parameters which predict the success or failure of trial without catheter (TWOC) for acute urine retention (AUR).

MATERIALS AND

METHODS

Medical records of 2 188 patients presenting with first episode of AUR were analyzed. All patients underwent catheterization and were started on α-blocker followed by TWOC. Age, baseline American urological association (AUA) score, prostate volume (PV), residual volume of urine (RV) and intravesical prostatic protrusion (IPP), prostate specific antigen (PSA) were recorded.

RESULTS

TWOC was successful in 737 patients (33.7%) and failed in 1 451 patients (66.3%). Patients with successful TWOC had lower mean age, PV, IPP, RV, AUA score, and PSA than those with failed TWOC. On multivariate analysis, the significant independent predictors were IPP, age, AUA score, PV, and RV at odds ratios of 3.11, 1.84, 1.78, 1.53, and 1.23, respectively. From ROC curve, IPP had cut off value of 9 mm and detected success of TWOC with sensitivity (S) of 91% and failure with specificity (s) of 90%. Similarly, cut off value of 64 years for age (S:86%, s:87%), 20 for AUA symptom score (S:83%, s:81%), 56 cc for PV (S:80%, s:74%) and 750 mL for RV (S:71%, s:68%) were obtained.

CONCLUSION

Age, baseline AUA score, IPP, PV, and RV independently predict the outcome of TWOC. Patients with IPP > 9 mm, age > 65 years, baseline AUA score > 20, PV > 56 cc, or RV > 750 mL have less probability of successful TWOC in AUR and can be considered for immediate surgery following an episode of AUR.