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  • Title: Prostate size influences the outcome after presenting with acute urinary retention.
    Author: McNeill AS, Rizvi S, Byrne DJ.
    Journal: BJU Int; 2004 Sep; 94(4):559-62. PubMed ID: 15329112.
    Abstract:
    OBJECTIVE: To evaluate the long-term outcome in an open follow-up of a cohort of patients who had had a successful trial without catheter (TWOC) after an episode of acute urinary retention (AUR), as it is now widely accepted that giving an alpha-blocker, e.g. alfuzosin, increases the success rate of TWOC. PATIENTS AND METHODS: In this prospective trial, 81 patients with a first episode of AUR related to benign prostatic obstruction received either sustained-release alfuzosin (40) 5 mg twice daily or placebo (41) for 48 h. The catheter was removed after 24 h of treatment and the patient's ability to void assessed. Those who voided successfully entered an open follow-up, the defined endpoints of which were the date of recurrent AUR, date of bladder outlet surgery, date of last follow-up or death, and factors that influenced the long-term outcome after a successful TWOC were examined. RESULTS: Of the 34 patients who had a successful TWOC (22 on alfuzosin, 12 placebo, P= 0.03), 21 continued on an alpha-blocker at the discretion of their urologist. In all, 26 had a further episode of AUR or surgery during the 6-year follow-up. The mean (median, range) time to the second episode of AUR in the 20 (59%) patients affected was 1.4 (0.6, 0-5.95) years. Nineteen (56%) men had bladder outlet surgery, 13 after a second episode of AUR. The mean time to operation after the first AUR was 1.85 (1.1, 0.04-5.4) years. The remaining eight (24%) patients remained free of further AUR and surgery. The size of the prostate assessed on a digital rectal examination by the admitting urologist was the only factor with a significant effect on the long-term outcome. A postvoid residual of > 50 mL was associated with a greater likelihood of recurrent AUR or surgery, but this was not statistically significant. CONCLUSIONS: This study provides further evidence of the importance of prostate size as a prognostic factor in determining the outcome in patients with prostatic obstruction. Whilst most men presenting with AUR will eventually have prostatic surgery, a significant minority will not. An assessment of risk factors such as prostate size may identify those who require urgent intervention after a successful TWOC. The role of continued medical therapy with alpha-blockers and/or 5alpha-reductase inhibitors after a successful TWOC merits further investigation.
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