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Are APLS formulae for estimating weight appropriate for use in children admitted to PICU?

Christopher Flannigan1, Thomas W Bourke2, Ashley Sproule

  • 1Paediatric Intensive Care, Birmingham Children's Hospital, Steelhouse Lane, Birmingham B4 6NH, United Kingdom.

Resuscitation
|April 15, 2014
PubMed

Insights

The widely used APLS UK weight estimation formulae are not suitable for children in UK paediatric intensive care units (PICUs). New, specific formulae are needed for accurate weight prediction in this critical patient group.

Area of Science:

  • Pediatric Critical Care Medicine
  • Clinical Pharmacology
  • Biostatistics

Background:

  • Accurate weight estimation is crucial for medication dosing and fluid management in pediatric intensive care.
  • Current weight estimation formulae, such as those from Advanced Paediatric Life Support (APLS) UK, are widely used but their applicability in critically ill children is uncertain.

Purpose of the Study:

  • To evaluate the accuracy of the revised APLS UK weight estimation formulae in a United Kingdom pediatric intensive care unit (PICU) population.
  • To determine if existing formulae are appropriate for critically ill children aged from term corrected to 15 years.

Main Methods:

  • A retrospective observational study analyzed data from 10,081 children admitted to UK PICUs between 2006 and 2010.
  • Actual mean weights were compared against weights estimated using age-appropriate APLS UK formulae.
  • Simple linear regression was employed to develop new predictive formulae.

Main Results:

  • The APLS UK formula 'Weight=(0.5×age in months)+4' significantly overestimated weights by 10–25.4% in children under 1 year.
  • The formula 'Weight=(2×age in years)+8' accurately estimated weights for 1-year-olds but underestimated for 2–5 year olds (2.8–4.9%).
  • The formula 'Weight=(3×age in years)+7' overestimated weights for 6–11 year olds by 8.6–20.7%.

Conclusions:

  • The APLS UK weight estimation formulae are inappropriate for children admitted to UK PICUs.
  • Relying solely on these formulae can lead to significant errors in weight estimation due to wide standard deviations across all age groups.
  • Novel formulae specifically derived for the PICU population are necessary for accurate weight prediction.
Abstract

Keywords:
Body weightChildElectronic PrescribingEmergenciesGreat BritainIntensive care units, Paediatric

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