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  • Title: Ketamine infusions as an adjunct for sedation in critically ill children.
    Author: Johnson PN, Mayes R, Moore E, Neely S, Nguyen AL, Miller JL.
    Journal: J Opioid Manag; 2022; 18(1):57-68. PubMed ID: 35238014.
    Abstract:
    OBJECTIVE: Limited reports have described ketamine's role as an adjunct sedative. The purpose was to describe ketamine's role as an adjunct to achieve goal sedation in mechanically ventilated children. DESIGN: Retrospective, descriptive study. SETTING: Thirteen-bed pediatric intensive care unit (ICU) and 12-bed pediatric cardiovascular ICU. PARTICIPANTS: Seventy-three ketamine courses were included, representing 62 mechanically ventilated children <18 years receiving ketamine for ≥12 hours. MAIN OUTCOME MEASURE(S): The primary outcome was to determine the median dose and time to achieve goal sedation (80 percent of State Behavioral Scale scores between 0 and -1) based on ketamine's place in therapy as an adjunct in the sedation regimen. Secondary outcomes included a comparison of sedative dosing pre- and post-ketamine initiation between place in therapy groups and paralyzed/nonparalyzed patients, and identification of ketamine-attributed adverse drug event (ADEs) or iatrogenic withdrawal syndrome (IWS). RESULTS: The median age was 1.0 years (interquartile range: 0.4-4.9). Ketamine was initiated as first-line (n = 7; 9.6 percent), second-line (n = 39; 53.4 percent), third-line (n = 26; 35.6 percent), or fourth-line (n = 1; 1.4 percent) sedation. The median initial and peak doses were 0.6 mg/kg/h (0.3-0.6) and 0.9 mg/kg/h (0.9-1.2), respectively. The median dose and time to achieve goal sedation was 0.8 mg/kg/h (0.6-1.1) and 2 hours (1-7), respectively. ADEs were noted during three courses (4.1 percent) and IWS after discontinuation of one course (1.4 percent). CONCLUSIONS: The majority were initiated on ketamine as a second- or third-line adjunct sedative. The median initial dose was 0.6 and dose to achieve goal sedation was 0.8 mg/kg/h. Ketamine-attributed ADEs and IWS episodes were rare.
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