Indian Journal of Urology
: 2007  |  Volume : 23  |  Issue : 4  |  Page : 485--486

Is there a better indicator for predicting the outcome of trial without catheter?

R Shanmugasundaram, Nitin S Kekre 
 Department of Urology, Christian Medical College, Vellore - 632 004, Tamilnadu, India

Correspondence Address:
Nitin S Kekre
Department of Urology, Christian Medical College, Vellore - 632 004, Tamilnadu

How to cite this article:
Shanmugasundaram R, Kekre NS. Is there a better indicator for predicting the outcome of trial without catheter?.Indian J Urol 2007;23:485-486

How to cite this URL:
Shanmugasundaram R, Kekre NS. Is there a better indicator for predicting the outcome of trial without catheter?. Indian J Urol [serial online] 2007 [cited 2022 Dec 3 ];23:485-486
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Full Text


This prospective clinical study was done to assess the impact of intravesical prostatic protrusion (IPP) on the outcome of trial without catheter (TWOC) following acute urinary retention (AUR). Consecutive white men aged 50 years or older with AUR related to benign prostatic hyperplasia (BPH) were recruited for the study. The mean age of these men was 70.1 years. Men with neurological illness, prostatic carcinoma, abnormal renal function, urethral stricture, residual urine > 1500 ml, prostatic or urethral surgery, being treated with anticholinergics and with severe co-morbid illness were excluded. All were given 10 mg of Alfusozin daily after catheterization along with treatment of precipitating factors. TWOC was given after two weeks. The prostatic volume was measured with transrectal ultrasound of the prostate (TRUS) immediately after catheter removal. The mean prostatic volume (PV) of this cohort was large (68.3 ml) and their mean IPP was 12.4 mm. Fifty-seven out of 121 men with AUR fulfilled the selection criteria. Of these 57, 18 and 39 had precipitated and spontaneous AUR respectively. A strong correlation was noted between successful TWOC and prostatic volume and IPP. Twenty-five out of 57 (43.9%) had successful TWOC (8/18 in the precipitated group and 17/39 in the spontaneous group). Men with successful TWOC had smaller mean PV (55 vs 70 ml) and smaller mean IPP (7.2 mm vs 16.5 mm). No association was found between age, retention volume, mode of retention (spontaneous or precipitated) and successful TWOC. Men with PV ≥ 50 ml had a three fold risk of unsuccessful TWOC compared to those with PV 10 mm (P [1] Serum prostate specific antigen (PSA) as a surrogate marker for prostatic volume has also been found to predict the outcome of TWOC. The higher the PSA, the greater is the subsequent risk for unsuccessful TWOC and surgery. [2] In this prospective study on white men, the subjects had a larger mean prostatic volume of 68.3 ml. Men with successful TWOC had smaller prostates and smaller IPP. Whether IPP measurement alone, irrespective of the size of the prostate, can be used to predict the success of TWOC remains unanswered. However, an IPP > 10 mm even in smaller volumes of the prostate (average volume of 39 ml) has been shown to be a predictor of an unsuccessful outcome of TWOC by Tan and Foo in their Asian cohort. [3] IPP was measured by the transabdominal method and no alpha blockers were used in their study. Thus, an IPP [4] Irrespective of the method of estimation, an IPP > 10 mm in men presenting with AUR due to BPH should set off warning bells that they are unlikely to have successful TWOC and are to be counseled for prostatectomy. IPP may not only predict the success of TWOC outcome, but can also be used in prognostication and treatment of symptomatic BPH. The predicting ability of IPP in the success of TWOC needs to be further established by standardizing its method of estimation and correlating it with other variables like prostatic volume, PSA, residual urine and severity of LUTS in larger multicentric prospective studies.


1Djavan B, Shariat S, Omar M, Roehrborn CG, Marberger M. Does prolonged catheter drainage improve the chance of recovering voluntary voiding after urinary retention? Eur Urol 1999;33:110.
2McNeil SA, Hargreave TB, Roehrborm CG; ALFAUR study Group. Alfuzosin 10mg once daily in the management of acute urinary retention: Results of a double-blind placebo-controlled study. Urology 2005;65:83-90.
3Tan YH, Foo KT. Intravesical prostatic protrusion predicts the outcome of a trial without catheter following acute urinary retention. J Urol 2003;170:2339-41.
4Chia SJ, Heng CT, Chan SP, Foo KT. Correlation of intravesical prostatic protrusion with bladder outflow obstruction. BJU Int 2003;91:371-4.