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Bladder outlet obstruction in men with acute urinary retention: an urodynamic study.
MedLine Citation:
PMID:  23325166     Owner:  NLM     Status:  Publisher    
OBJECTIVE: To identify clinical predictors of bladder outlet obstruction (BOO) in men with the first episode of spontaneous acute urinary retention (AUR), in order to facilitate patient selection for early de-obstructive prostate surgery. METHODS: A multichannel urodynamic investigation was performed in 156 consecutive men ≥50 years five days following AUR. Clinical routine parameters were evaluated for their ability to predict BOO, which was defined as a BOO-index (BOOI) >40. Univariable and multivariable logistic regression models were fitted. A nomogram was constructed from significant variables of a reduced multivariable model. Discrimination and calibration of the nomogram were assessed. RESULTS: The mean age of the 156 men was 71.6 years, and the mean drained volume was 953 mL. Seventy-two men (46.2 %) had severe AUR-associated pain. On urodynamic evaluation, 79 (50.6 %) were obstructed (BOOI > 40). In multivariable regression analysis, age (p = 0.014) drained volume (p = 0.044) and pain intensity (p < 0.001) were independently associated with BOO. These variables formed the basis of the nomogram, which predicted BOO with a bootstrap-corrected accuracy of 78.2 %. The positive predictive value, sensitivity, and specificity of a 70 % nomogram cutoff was 83, 51, and 90 %, respectively. Decision-curve analysis demonstrated a net benefit with use of the nomogram. CONCLUSIONS: The routine clinical parameters age, drained volume, and pain intensity are independent predictors of BOO in men with AUR. According to our model, patients with a nomogram predicted BOO probability of >70 % might be candidates for early surgery. External validation of the nomogram is advocated.
Maximilian Rom; Matthias Waldert; Hans Christoph Klingler; Tobias Klatte
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-17
Journal Detail:
Title:  World journal of urology     Volume:  -     ISSN:  1433-8726     ISO Abbreviation:  World J Urol     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8307716     Medline TA:  World J Urol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Urology, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria.
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