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Reduced body cell mass following severe head injury in children: implications for rehabilitation
R A Littlewood1, M Wotten, O Trocki
1Statewide Paediatric Rehabilitation Service, Royal Children's Hospital, University of Queensland, Herston, Australia.
Insights
Head-injured children in rehabilitation show significant muscle wasting, with body composition revealing poor nutritional status not detected by standard anthropometric measures. This highlights the need for advanced assessment in pediatric head trauma recovery.
Area of Science:
- Pediatric Traumatology
- Nutritional Science
- Rehabilitation Medicine
Background:
- Severe head injury is associated with increased proteolysis and muscle catabolism.
- The impact on body composition in pediatric patients during rehabilitation remains understudied.
Purpose of the Study:
- To assess the nutritional status and body composition, specifically body cell mass (BCM), in children with head injuries at the start of rehabilitation.
- To compare body composition analysis with anthropometric nutritional assessment methods.
Main Methods:
- Nineteen head-injured children (mean age 9.1 years) had height, weight, and total body potassium (TBK) measured.
- TBK, a measure of BCM, was compared to normative data from healthy children.
- Nutritional status was evaluated using both anthropometric and body composition methods.
Main Results:
- Children had a mean TBK of 84.4% of expected for height, below the acceptable 90% BCM threshold.
- Only 1 out of 19 children was classified as undernourished by anthropometry.
- Body composition analysis indicated poor nutritional status in 12 out of 19 children (p = 0.006).
Conclusions:
- Head-injured children exhibit significant depletion of metabolically active BCM despite normal anthropometry.
- This suggests substantial muscle wasting in pediatric head trauma patients.
- Findings have critical pathophysiological and clinical implications for pediatric head trauma rehabilitation.
Statement Of Purpose:
Increased proteolysis, muscle catabolism and altered body composition have been well documented after severe head injury, but the extent of these effects in children, and whether they extend into rehabilitation, have not been studied. This study determined nutritional status and body composition, with particular reference to the body cell mass (BCM), of head injured children at entry into a rehabilitation programme, and compared body composition analysis with anthropometric nutritional assessment.
Methods:
Nineteen head injured children (nine males, 10 females, mean age 9.1 +/- 4.3 years range 1.2-15.1 years) were measured for height, weight and total body potassium (TBK, a measure of body cell mass) on referral to rehabilitation after the acute phase (mean 38.1 days post-injury). Data was compared with expected normative data derived from healthy age and gender matched children. Nutritional status was determined by two separate criteria based on either anthropometric or body composition methods.
Results:
The mean percentage of expected TBK for height was 84.4 +/- 15%, significantly below the clinically acceptable level for body cell mass (90% of expected). Using the anthropometric definition, only 1/19 was undernourished, whereas 12/19 had poor nutritional status using body composition (chi 2 = 7.58, p = 0.006).
Conclusions:
The data revealed a significant depletion in the metabolically active BCM in the presence of normal anthropometry, suggestive of significant muscle wasting. These findings have important pathophysiological and clinical implications in the rehabilitation of children following major head trauma.
