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Role of transfusions in the development of hospital-acquired urinary tract–related bloodstream infection among United States Veterans

Published:November 20, 2018DOI:https://doi.org/10.1016/j.ajic.2018.09.013

      Background

      Urinary tract–related bloodstream infection (BSI) is associated with substantial morbidity, mortality, and financial costs. We examined the role of red blood cell (RBC) transfusions on developing this condition among US Veterans.

      Methods

      We conducted a matched case-control study among adult inpatients admitted to 4 Veterans Affairs hospitals. Cases were patients with a positive urine culture result obtained 48hours or longer after admission and a blood culture obtained within 14days of the urine culture, which grew the same organism. Controls included patients with a positive urine culture result who were at risk for but did not develop BSI (control group 1) and patients without a positive urine culture result who were present in the facility at the time of case diagnosis (control group 2).

      Results

      Compared with the findings in control group 1, receipt of RBCs was not significantly associated with urinary tract–related BSI (odds ratio, 1.03; 95% confidence interval, 1.00-1.07; P = .07). However, we found increased odds of urinary tract–related BSI compared with the results in patients without infection (control group 2) (odds ratio, 1.11; 95% confidence interval, 1.06-1.17; P < .001).

      Conclusions

      Given the heightened risk of urinary tract–related BSI associated with receiving a greater number of RBC transfusions, adhering to recommendations to transfuse the minimum amount of blood products necessary may minimize the risk of this infection among Veterans.

      Key Words

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