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Published on: August 19, 2020
Effects of continuous ketamine infusion on hemodynamics and mortality in critically ill children
Sojin Park1, Ah Young Choi2, Esther Park2
1Department of Pharmaceutical Services, Samsung Medical Center, Seoul, Republic of Korea.
Insights
Continuous ketamine infusion in pediatric intensive care units (PICUs) did not significantly alter blood pressure or vasopressor use. This sedative agent can be safely administered without causing hemodynamic instability in critically ill children.
Area of Science:
- Pediatric Critical Care Medicine
- Pharmacology
- Hemodynamics
Background:
- Continuous sedation is common in pediatric intensive care units (PICUs).
- Ketamine is an anesthetic agent with potential sedative properties.
- Limited data exists on the hemodynamic and mortality effects of continuous ketamine infusion in critically ill children.
Purpose of the Study:
- To investigate the hemodynamic and mortality effects of continuous ketamine infusion in critically ill pediatric patients.
- To compare vital signs, vasopressor use, and sedation/pain scores before and after ketamine initiation.
- To assess the association between continuous ketamine and mortality.
Main Methods:
- Retrospective cohort study in a tertiary PICU.
- Included patients receiving continuous sedation for ≥24 hours between 2015-2017.
- Compared hemodynamic parameters and vasogenic medication use 12 hours pre- and post-ketamine initiation.
- Multivariate logistic regression used to compare mortality rates between ketamine and non-ketamine groups.
Main Results:
- 82 patients received continuous ketamine (median infusion rate 8.1 mcg/kg/min, median duration 6 days).
- Heart rate and respiratory rate decreased significantly after ketamine infusion (P=.033 and P=.001, respectively).
- Blood pressure and vasogenic medication use did not change significantly.
- Continuous ketamine was not a significant risk factor for mortality (HR 1.352, CI 0.458-3.996).
Conclusions:
- Continuous ketamine infusion can be used in PICU settings without inducing significant hemodynamic instability.
- Further randomized controlled trials are needed to confirm these findings on hemodynamics, sedation, and mortality.
Abstract:
We investigated the hemodynamic and mortality effects of continuous ketamine infusion in critically ill pediatric patients. We conducted a retrospective cohort study in a tertiary pediatric intensive care unit (PICU). Patients who used continuous sedative from 2015 to 2017 for 24 hours or more were included. We compared blood pressure, heart and respiratory rates, vasogenic medications, and sedation and pain scores for 12 hours before and after initiation of continuous ketamine. The mortality rates for continuous ketamine and Non-ketamine groups were compared by multivariate logistic regression. A total of 240 patients used continuous sedation, and 82 used continuous ketamine. The median infusion rate of ketamine was 8.1 mcg/kg/min, and the median duration was 6 days. Heart rates (138 vs. 135 beat/minute, P = .033) and respiratory rates (31 vs. 25 respiration/minute, P = .001) decreased, but blood pressure (99.9 vs. 101.1 mm Hg, P = .124) and vasogenic medications did not change after ketamine infusion. Continuous ketamine was not a significant risk factor for mortality (hazard ratio 1.352, confidence interval 0.458-3.996). Continous ketamine could be used in PICU without hemodynamic instability. Further studies in randomized controlled design about the effects of continuous ketamine infusion on hemodynamic changes, sedation, and mortality are required.
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