Height Measurement in Critically Ill Children

Critically Ill Child, Height, Length, Nutritional Status

Height/length has to be assessed accurately in critically ill children, as its value is required to assess nutritional status, to calculate nutritional requirements, to calculate body surface area (involved in drug prescriptions), and to assess pulmonary function. The WHO has standardized practices to perform height/length measurements, but this gold standard is not applicable in critically ill children (who cannot stand and are equipped with catheters, tubes and various devices). It is not accurate to rely on previous measurements as children are continuously growing. No height/length measurement tool or method has been validated so far in this population, neither any estimation nor extrapolation methods. The investigators aim to compare the WHO gold standard for height/length measurement to a list of other methods, validated in other children populations and currently used in the pediatric setting. We intend to compare each of them to the gold standard. The secondary objectives are to describe each height/length extrapolation or estimation method and to estimate the practical use of each method for critically ill children. A prospective observational study is planned. 140 critically ill children admitted to pediatric intensive care unit (PICU) will be recruited. Body segments (ulna, tibia, knee-heel, arm span) will be measured and length/height extrapolated from formulas used in different populations. Previous length/height measurements will be collected to draw growth curves and extrapolate actual length/height. Parents will be asked how tall their child is. After PICU discharge, while the child meets WHO measurement standards, accurate length/height will be measured and compared to the results of the above mentioned techniques. Comparison will be made in-between these results.

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