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Age is of influence on midazolam requirements in a paediatric intensive care unit
Dana-Anne H de Gast-Bakker1, Suzanne D van der Werff, Renate Sibarani-Ponsen
1Department of Paediatric Intensive Care, VU Medical Center, Amsterdam, The Netherlands.
Insights
Children aged 1-4 years require higher midazolam doses for sedation during mechanical ventilation. Midazolam alone is an ineffective sedative for all pediatric intensive care unit patients.
Area of Science:
- Pediatric critical care medicine
- Pharmacology
- Anesthesiology
Background:
- Sedation is crucial for critically ill children requiring mechanical ventilation.
- Midazolam is commonly used for sedation in pediatric intensive care units (PICUs).
- Age-related differences in drug metabolism and response are well-documented in pediatric populations.
Purpose of the Study:
- To investigate the influence of age on midazolam requirements in critically ill children.
- To compare midazolam dosages across different pediatric age groups.
- To evaluate the efficacy of midazolam as a sole sedative agent.
Main Methods:
- Retrospective observational study of 58 children (28 days-18 years) requiring mechanical ventilation for at least 5 days.
- Children were categorized into three age groups: 28 days-1 year, 1-4 years, and older than 4 years.
- Midazolam dosage and sedative efficacy were analyzed over a 5-day period.
Main Results:
- Children aged 1-4 years required the maximum midazolam dosage (0.3 mg/kg/h) within 2 days.
- This age group exhibited higher mean total midazolam doses throughout the study period.
- By day 5, midazolam monotherapy was insufficient for sedation in all children aged 1-4 years.
Conclusions:
- Children aged 1-4 years necessitate higher midazolam dosages compared to younger and older children.
- Midazolam alone demonstrates limited efficacy as a sedative agent for all pediatric age groups.
- Further research is needed to understand age-related mechanisms affecting midazolam requirements and its role in PICU sedation.
Aim:
To test that age is of influence on midazolam requirements during prolonged mechanical ventilation in critically ill children.
Methods:
Retrospective observational study of children (28 days-18 year) admitted between January 1st 2002 and January 1st 2005 who needed controlled mechanical ventilation for 5 days and initial sedation with midazolam were included. Exclusion criteria were psychomotor retardation, therapeutic use of midazolam, ventilator weaning within 5 days, kidney or liver failure.
Results:
A total of 1186 children were admitted, of which 58 children were included. The children were divided into three age groups: 28 days-1 year (n = 28), 1-4 years (n = 16) and older than 4 years (n = 14). Within 2 days the children age 1-4 years received the maximum midazolam dosage (0.3 mg/kg/h). In addition, the mean total dose of midazolam was higher at all days for this age group. At day 5 none of the children between 1 and 4 years could be sedated with midazolam alone.
Conclusions:
Our data showed that children between 1 and 4 years needed higher doses of midazolam as compared to children who were younger and older. Furthermore, we observed that midazolam alone is a poor sedative for all age groups. The influence of and mechanisms for possible age related effects on midazolam requirements remain to be elucidated, as well as the position of midazolam as a first line drug for PICU sedation.
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