Objective
To characterize administration of sedatives, analgesics, and paralytics in a large cohort of mechanically ventilated, premature infants.
Study design
Retrospective cohort study including all infants <1500 g birth weight and <32 weeks gestational age mechanically ventilated at 348 Pediatrix Medical Group neonatal intensive care units (NICU) from 1997–2012. The primary outcome is the proportion of mechanically ventilated days in which infants were administered drugs of interest. Multivariable logistic regression was used to evaluate the predictors of administration of drugs of interest.
Results
We identified 85,911 mechanically ventilated infants. Infants received a drug of interest (opioids, benzodiazepines, other sedatives, and paralytics) on 433,587/1,305,413 (33%) of mechanically ventilated infant-days. The administration of opioids increased during the study period from 5% of infant-days in 1997 to 32% in 2012. The administration of benzodiazepines increased during the study period from 5% of infant-days in 1997 to 24% in 2012. Use of paralytics and other drugs remained ≤1% throughout the study period. Predictors of drug administration included younger gestational age, small for gestational age status, male sex, major congenital anomaly, older postnatal age at intubation, exposure to high frequency ventilation, exposure to inotropes, more recent year of discharge, and NICU site.
Conclusion
Administration of opioids and benzodiazepines in mechanically ventilated premature infants increased over time. Because infant characteristics were unchanged, site-specific differences in practice likely explain our observations. Increased administration over time is concerning given limited evidence of benefit and potential for harm.