IBCC Episode 89 - CAUTI

Catheter-associated urinary tract infection (CAUTI) often represents an over-diagnosed condition in intensive care, frequently confused with simple colonization. A functional Foley catheter typically prevents the ascending infections necessary for true urosepsis, meaning that positive urine cultures in the absence of systemic symptoms often reflect harmless bacterial presence rather than active disease. Accurate diagnosis requires strict adherence to clinical criteria, including significant bacterial growth and the exclusion of alternative infectious sources. Management prioritizes source control—such as replacing dysfunctional catheters—over reflexive antibiotic use, which should be reserved for patients with clear evidence of invasive infection. Biofilms on indwelling catheters further complicate treatment by sheltering bacteria and limiting drug penetration, reinforcing the necessity of daily assessment regarding the continued need for urinary catheters to prevent unnecessary complications and diagnostic errors.