Background: A common urological emergency requiring hospitalization is acute urine retention (ARU) brought on by benign prostatic hyperplasia (BPH), which is typically treated with urethral catheterization. The present study was conducted to assess outcome of initial trial without catheter in benign prostatic hyperplasia patients. Materials & Methods: 75 patients of acute urine retention of both genderswere divided into three groups according to intravenous prostatic protrusion. IPP was less than 5 mm in group I, 5–10 mm in group II, and greater than 10 mm in group III.Post-void residual urine volume (PVRU), IPP and its grade, total prostate volume, serum prostate specific antigen (PSA), international prostate symptom score (IPSS), and peak flow rate of patients who had voids were all measured. Results: The mean PSA was 5.98 ng/ml, 5.37 ng/ml and 4.98 ng/ml. The mean TPV was 43.9 ml, 48.4 ml and 43.1 ml. The mean TZV was 11.6 ml, 20.2 ml and 30.5 ml and the mean TZI was 0.37, 0.32 and 0.57 in group I, II and III respectively. The difference was significant (P< 0.05). There was significant difference in total score, irritative subscore and obstructive subscore of IPSS, QOL, Qmax and PVR in group I, II and III (P< 0.05). Conclusion: One useful metric for assessing the success of a voiding trial following ARU is intravenous prostatic protrusion.