1103. Improving Perioperative Prophylactic Antimicrobial Guideline Concordance in Liver and Lung Transplant Recipients

BACKGROUND: Surgical site infection (SSI) is a common complication among patients undergoing solid-organ transplantation. Administration of perioperative antimicrobials is one modifiable factor that may reduce the risk of SSIs. We sought to evaluate antimicrobial stewardship efforts to improve concordance of perioperative antimicrobial selection (AS) and dose timing (DT) with the institution’s perioperative antimicrobial guidelines among liver (LVR) and lung transplant recipients (LNG). METHODS: This was a single-center, observational study of LVR and LNG between January 1, 2017 and December 31, 2018. Patients receiving antimicrobials for the treatment of infection immediately prior to transplant were excluded. Throughout the study period, several interventions were performed, including: updating AS and DT protocols (2017 Q2) and preoperative order sets (2017 Q4), improving availability of antibiotics in the operating room (2018 Q1), and most recently developing a guideline and providing education for intraoperative redosing based on renal function (2018 Q3). The primary outcome was overall guideline concordance (GC). This was a composite endpoint including preoperative and intraoperative AS and DT, based on the institution’s guideline. Secondary outcomes included SSI rates based on the CDC National Healthcare Safety Network definition and rate of new C. difficile or vancomycin-resistant Enterococci infection or colonization. RESULTS: Among 112 patient screened, 79 patients were included (45 LNG and 34 LVR). The median age was 60 years and BMI was 26.5 kg/m(2). The median procedure length was 7.8 hours for LNG and 6.9 hours for LVR. Results are shown in Table 1, Figure 1 and Figure 2. All GC rates demonstrate improvements over time, except for intraoperative DT for LNG. CONCLUSION: Limited by a small sample size, our study demonstrates that noninvasive antimicrobial stewardship strategies can yield improvements in GC. [Image: see text] [Image: see text] [Image: see text] DISCLOSURES: All authors: No reported disclosures.