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Background While many have advocated for the use of EDSS to enhance patient care, EDSS that incorporates PK-PD, the science behind antimicrobial stewardship, has thus far been an unattainable goal. Herein, we describe the use of such a technology and clinicians’ therapy decisions when treating patients with pneumonia. Methods Data for patients with pneumonia entered into EDSS over a 20-month period that were evaluated included: 1) patient demographics, creatinine clearance, and pneumonia severity score; 2) pneumonia type; 3) pathogen; 4) clinician-selected antimicrobials; 5) EDSS-presented regimens; and 6) clinician-reported outcomes. Clinicians were provided probabilities of attaining PK-PD targets associated with efficacy for both clinician-selected and EDSS-presented regimens. A regimen with a probability of PK-PD target attainment ≥90% was considered PK-PD optimized. Results Data for 126 cases were available. The median (min, max) age and creatinine clearance were 56.5 (18, >90) years and 72.5 (2.5, 193.3) mL/minute/1.73 m2, respectively. Pneumonia types included community-acquired (39%), healthcare-associated (30%), ventilator-associated (18%), and hospital-acquired (13%). CURB-65 pneumonia scoring was used in 66% of cases with a median (min, max) score of 3 (0, 5). The most common pathogens were P. Aeruginosa (32%), MRSA (15%), and S. pneumoniae (14%). Multi-drug-resistant pathogens comprised 15% of all pathogens. PK-PD optimized regimens were selected in only 65% of cases despite such a regimen being presented in 91% of cases. For those cases in which outcome data were available (n = 36), 81% of patients were considered improved at 48 hours while only 64% were deemed clinically improved or a success at the final outcome assessment on Days 7–10. Among those cases for whom PK-PD optimized and non-optimized regimens were selected (64 and 36%, respectively), 78 and 62% of patients had successful clinical outcomes on Days 7–10, respectively. Conclusion Given that patients with pneumonia represent a vulnerable population and that options for therapy can be limited, selection of optimal early therapy is crucial. PK-PD integrated EDSS presents clinicians the opportunity to optimize therapy and improve outcomes for patients with pneumonia. Disclosures S. M. Bhavnani, ICPD Technologies: Shareholder, stock options. C. M. Rubino, ICPD Technologies: Shareholder, stock options. P. G. Ambrose, ICPD Technologies: Shareholder, stock options.

open forum infectious diseases

At the Crossroads of Stewardship and Technology: Impact of Pharmacokinetic-Pharmacodynamic (PK-PD) Integrated Electronic Decision Support Software (EDSS) on the Treatment of Patients Infected with Pneumonia