title: Predicting outcome of trial of voiding without catheter in acute urinary retention with intravesical prostatic protrusion.
abstract: BACKGROUND
  Acute urinary retention (AUR) is one of the most serious complications of benign prostatic hypertrophy. This study was done to predict the outcome of trial of voiding without catheter (TWOC) in patients with AUR with intravesical prostatic protrusion (IPP) detected on transabdominal ultrasound. Other factors such as prostatic volume and patient's age were also assessed.
  
  
  METHODS
  Patients with a first episode of AUR secondary to benign prostatic hypertrophy were assessed with ultrasound following bladder catheterization. The IPP was measured and graded (grade 1 is 5 mm or less, grade 2 is 5-10 mm and grade 3 is more than 10 mm). Success of TWOC was then correlated with the degree of IPP.
  
  
  RESULTS
  A total of 32 patients with AUR were included in the study. Patients with grade 3 IPP were found to have a significant failure rate compared to grade 1 (P = 0.022) and grade 2 (P = 0.041).
  
  
  CONCLUSIONS
  Intravesical prostatic protrusion is a useful predictor of success of TWOC in patients with AUR. Patients with grade 3 IPP on ultrasound would benefit from TWOC and warrant earlier definitive surgical treatment.
authors.affiliation: Department of Radiology, Universiti Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latiff, 56000 Cheras, Kuala Lumpur, Malaysia.
authors.forename: Osman
authors.initials: O
authors.lastname: Syazarina Sharis
authors.forename: Md Zainuddin
authors.initials: MZ
authors.lastname: Zulkifli
authors.forename: Abdul Hamid
authors.initials: AH
authors.lastname: Hamzaini
keywords: acute urinary retention; benign prostatic hypertrophy; intravesical prostatic protrusion; prostate volume; trial of micturation without catheter