Protocolized Urine Sampling is Associated with Reduced Catheter-Associated Urinary Tract Infections: A Pre- and Post-intervention Study.

Standard urine sampling and testing techniques do not mitigate against detection of colonization, resulting in false positive catheter-associated urinary tract infections (CAUTI). We aim to evaluate if a novel protocol for urine sampling and testing reduces rates of CAUTI.

A pre-intervention and post-intervention study with a contemporaneous control group was conducted at two campuses (test and control) of the same academic medical center. The test campus implemented a protocol requiring urinary catheter removal prior to urine sampling from a new catheter or sterile straight catheterization, along with urine bacteria and pyuria screening prior to culture. Primary outcomes were test campus CAUTI rates compared between each 9-month pre- and post-intervention epoch. Secondary outcomes included the percent reductions in CAUTI rates compared between the test campus and a propensity-score matched cohort at the control campus.

  A total of 7,991 patients from the test campus were included in the primary analysis, and 4,264 were included in the propensity-score matched secondary analysis. In primary analysis, CAUTI/1000-patients was reduced by 77% (6.6 to 1.5), CAUTI/1000-catheter days by 63% (5.9 to 2.2) and urinary catheter days/patient by 37% (1.1 to 0.69, all P≤0.001). In propensity score-matched analysis, CAUTI/1000-patients was reduced by 82% at the test campus versus 57% at the control campus, CAUTI/1000 catheter-days declined by 68% versus 57% and catheter-days/patient decreased by 44% versus 1% (all P<0.001).

 Protocolized urine sampling and testing aimed at minimizing contamination by colonization was associated with significantly reduced CAUTI infection rates and urinary catheter days.

Clinical infectious diseases : an official publication of the Infectious Diseases Society of America. 2020 Aug 10 [Epub ahead of print]

Jennifer A Frontera, Erwin Wang, Michael Phillips, Martha Radford, Stephanie Sterling, Karen Delorenzo, Archana Saxena, Shadi Yaghi, Ting Zhou, D Ethan Kahn, Aaron S Lord, Joseph Weisstuch

Department of Neurology, NYU School of Medicine, New York, NY., Department of Medicine, NYU School of Medicine, New York, NY., Department of Nursing, NYU School of Medicine, New York, NY.