1077. Reduce Anti-Microbial Use in Extracorporeal Membrane Oxygenation: Reduce AMMO Study

BACKGROUND: The use of extracorporeal membrane oxygenation (ECMO) in critically ill adults is increasing. Patients on ECMO are at high risk for infections, with 20.5% of adults acquiring infections while on ECMO. An Extracorporeal Life Support Organization (ELSO) Infectious Disease Task Force statement concluded that no antibiotic prophylaxis is needed for patients on ECMO though it also noted that this was based on limited data. We implemented an antimicrobial prophylaxis protocol for patients on ECMO at our institution and analyzed antimicrobial use and outcomes in these patients with a pre- and post-analysis. METHODS: We conducted a retrospective review of 294 patients on ECMO between July 1, 2011 and July 1, 2017. An ECMO antimicrobial prophylaxis guideline was initially implemented on July 1, 2014; there was poor adherence to the guideline and antimicrobial use actually increased. A more restrictive protocol was implemented in November 2018 with input from stakeholders including cardiac surgeons, critical care and infectious disease (ID) providers. We had a cohort of 161 patients before (July 2014–November 2018) and 37 patients after (November 2018–April 2018) the implementation of the updated protocol. We evaluated primary outcomes of gross days of antimicrobial use, percent of antibiotic-free days and days of individual antimicrobial use, adjusted for APACHE scores and ECMO duration. RESULTS: When adjusted for days on ECMO, mean antibiotic days decreased after implementation of the protocol; for vancomycin (0.27 vs. 0.02, P < 0.0003), cefepime (0.15 vs. 0.02, P < 0.02), meropenem (0.09 vs. 0, P < 0.02), zosyn (0.16 vs. 0, P < 0.002), caspofungin (0.346, 0.138 P < 0.003). This was accompanied by a nonsignificant increase in mean fluconazole use (0.29 vs. 0.37, P < 0.3). There was no impact on patient mortality or nosocomial infection rate. Additional results can be found in table. CONCLUSION: The use of an antimicrobial prophylaxis protocol in ECMO patients led to improvement in antimicrobial usage without increasing nosocomial infections in a population at a high risk of infection. [Image: see text] [Image: see text] [Image: see text] DISCLOSURES: All authors: No reported disclosures.