1134. Antibiotic Indications and Appropriateness in the Pediatric Intensive Care Unit: A 10 Center Point Prevalence Study

Background Antibiotics are prescribed in up to 80% of pediatric intensive care unit (PICU) patients, but multicenter studies systematically evaluating antibiotic indications and appropriateness in this high-utilizing population are lacking. Methods A multicenter point prevalence study was conducted at 10 geographically diverse tertiary care US children’s hospitals. All PICU patients < 21 years of age who were receiving systemic antibiotics at 8:00 AM on each study day were included. Study days occurred in February and March 2019. Data were abstracted by critical care and/or infectious diseases trained clinicians using standardized data collection forms and definitions of antibiotic appropriateness. Results 408 of 732 PICU patients (56%) received 618 antibiotics on the two study days. Empiric therapy for suspected bacterial infections without sepsis was the most common indication for antibiotics (22%), followed by treatment of community-acquired pneumonia and empiric therapy for septic shock (12% each, Figure 1). Overall, 194 antibiotic orders (32%) were classified as inappropriate and 158 patients (39%) received at least one inappropriate antibiotic. Vancomycin, cefepime, and ceftriaxone were the antibiotics most often inappropriately prescribed (Figure 2). Antibiotics prescribed inappropriately for the top 5 indications shown in Figure 1 accounted for 77% of all inappropriate antibiotic use. Prolonged ( >4 days) empiric therapy and prolonged ( >24 hours) post-operative prophylaxis were the most common reasons antibiotics prescribed for these indications were classified as inappropriate. Pneumonia and ventilator-associated infections were the most common infections for which antibiotics were prescribed inappropriately (46%). Reasons for inappropriate antibiotic use included lack of evidence supporting a bacterial infection (no radiographic infiltrate or significant increase in respiratory support) and use of unnecessarily broad antibiotics (Table 1). Conclusion Inappropriate antibiotic use is common in the PICU, particularly for pneumonia. Studies focused on defining optimal treatment strategies, as well as improved diagnostic approaches to curtail prolonged courses of empiric therapy, should be prioritized. Disclosures All authors: No reported disclosures.