Abstract
The objective of this study was to evaluate if twice-daily nitrofurantoin for 5 days after discontinuation of transurethral catheterization decreases the rate of urinary tract infection (UTI) in women with postoperative urinary retention (POUR) after pelvic reconstructive surgery. This was a double-blind, placebo-controlled, randomized trial conducted across 2 clinical sites between October 2017 and April 2019. Women with acute POUR after pelvic reconstructive surgery were included and randomized to nitrofurantoin (100 mg) or placebo twice-daily for 5 days. The primary outcome was clinically suspected UTI (defined as dysuria, frequency, and irritation in the absence of vaginal discharge) and/or culture-proven UTI (defined as greater than 105 colony forming units of a single organism) within 30 days of surgery. Secondary outcomes included evaluation of adverse events related to study medication and medication adherence. Data from 164 participants were eligible for intention-to-treat analysis (nitrofurantoin, n = 82; placebo, n = 82). There were no significant demographic or intraoperative differences except for body mass index and race. Median duration of catheterization was 3 days (interquartile range, 2-5 days, P = 0.12). Fifteen women in the nitrofurantoin group and 14 women in the placebo group experienced UTI within 30 days (18.3% vs 17.1%; P = 0.84; odds ratio, 1.09; 95% confidence interval, 0.49-2.43). There were no study medication allergies; however, nausea was the most common intolerance. Most women in each group completed the study drug treatment (91.5% vs 86.4%, P = 0.30). Nitrofurantoin prophylaxis after transurethral catheter removal did not reduce the risk of UTI in women with acute POUR after pelvic reconstructive surgery.
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