• Pamela D Reiter, Jennifer Roth, Beth Wathen, Jaime LaVelle, and Leslie A Ridall.
• Department of Pharmacy and Division of Pediatric Critical Care, Children's Hospital Colorado, Aurora, CO.
• Pediatr Crit Care Me. 2018 Apr 1; 19 (4): 281-286.

ObjectivesTo describe the use of low-dose bolus epinephrine in critically ill children during an acute hypotensive episode or prearrest condition.DesignInstitutional Review Board approved, single-center, retrospective medical chart review.SettingLarge medical-surgical PICU within a freestanding, tertiary care children's hospital.PatientsPatients admitted to the PICU between June 1, 2015, and June 1, 2016, who received low-dose (≤ 5 µg/kg) IV bolus epinephrine.InterventionsNone.Measurement And Main ResultsTwenty-four resuscitation episodes (63 doses; 19 patients) were analyzed. Median age and weight of patients were 9 years (interquartile range, 1-15 yr) and 38.5 kg (interquartile range, 12-54.8 kg). Median Pediatric Risk of Mortality III score was 17 (interquartile range, 10-27). Mean epinephrine dose was 1.3 ± 1.1 µg/kg. Median number of doses per patient was two. If more than one dose was provided, median dosing interval was 6.5 minutes. Heart rate and mean arterial blood pressure were compared at the time of epinephrine administration and 1-4 minutes (median = 1 min) following administration. Heart rate changed from 130 ± 41 to 150 ± 33 beats/min (p < 0.05), and mean arterial blood pressure changed from 51 ± 17 to 75 ± 27 mm Hg (p < 0.001). Variability in mean arterial blood pressure response was observed; nonresponders required extracorporeal membrane oxygenation; 66% of doses resulted in up to 100% mean arterial blood pressure increase, and 21% of doses resulted in greater than 100% mean arterial blood pressure increase. Doses below 1 µg/kg were associated with a lower mean arterial blood pressure increase than doses between 1 and 5 µg/kg (mean percent change in mean arterial blood pressure = 6.6% vs 60%, respectively). Children less than or equal to 2 years old had the greatest percentage increase in heart rate and mean arterial blood pressure.ConclusionsProvision of low-dose bolus epinephrine during periods of acute hypotension can result in a significant increase in mean arterial blood pressure and heart rate. This dosing strategy may provide temporary stabilization while other therapies are added or adjusted, but further research is needed.

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