A Retroprospective Study of an Antimicrobial Stewardship Program on Antimicrobial Utilization at a Tertiary Care Medical Center in Kolkata

Abstract

The WHO has set Defined Daily Dose which represent the average daily dose of an antibiotic in a standard patient. The DDD mainly focuses on population-based parameters & assumes that patients as well as hospitals are homogenous entities. DOTs are very useful in order to classify antibiotic days based on patient-level exposure. DOTs merely mean the number of days that a patient is on an antibiotic, irrespective of dose. DOTs signifies that the underlying assumptions about antibiotic dosing was appropriate. Additionally, when patients receive more than one antibiotic, supplementary DOT may be counted. The 300-bed tertiary care medical center serves adults and paediatrics. An all-time Microbiology Consultant and a Clinical Pharmacology trainee used to go for round daily and used to collect data for ASP for the period of 3 months that is April to June,2021. In this study we have compared DOT of some important antibiotics for a specific period of time for both COVID and NON COVID patient. ASP-focused antibiotics were antibiotics routinely evaluated by the ASP team for appropriateness during therapy and the potential to optimize their appropriate use through policies, protocols, formulary restrictions, or clinician education. ASP-focused antibiotics included meropenem, linezolid, pip-taz, poly b, colistin, teicoplanin. In this study we have compared the DDD for 2 specific period of time for better understanding the consumption of those antibiotics. In conclusion, following the initiation of an ASP, significant decreases in utilization, increases in cost savings occurred. In our study we have reduced the consumption and DDD of linezolid which is clinically significant. When it comes to DOTs; We have reduced the DOTs of piptaz and teicoplanin for covid patient And Reduced the DOTs of meropenem and teicoplanin for noncovid patient which is clinically and statistically significant.