Troubles nutritionnels lors de la sclérose latérale amyotrophique (SLA) | Nutritional troubles in amyotrophic lateral sclerosis (ALS)
2011
Marin, Benoît | Jésus, Pierre | Preux, Pierre-Marie | Couratier, Philippe | Desport, Jean-Claude
Amyotrophic lateral sclerosis (ALS) is a rare neuromuscular disease, with a severe prognostic. Its consequences are not only neurological, but also nutritional, linked with a decrease of feeding, caused by swallowing and salivation disorders, a frequent anorexia or constipation, troubles due to a possible respiratory insufficiency, and sometimes important difficulties for going shopping, cooking and more simply putting the food into the mouth. Although fat-free mass is usually decreased during ALS, a paradoxical hypermetabolism is present in 50 to 70% cases, favouring nutritional alterations. The tools used for assessment, sometimes specific to the disability, are anthropometric criteria, body impedance analysis (BIA), dietetic surveys, dual X-ray absorptiometry and indirect calorimetry. Alimentary intakes, weight, fat-free mass and body mass index are progressively reduced, leading to malnutrition. BIA phase angle is largely decreased, reflecting severe cellular alterations. Disorders of lipid status are possible but inconsistent across studies and perhaps linked with cultural feeding habits. The loss of weight at diagnosis and malnutrition during evolution are independent prognostic factors for survival, justifying early nutritional assessment and care. During evolution of ALS, a higher level of fat mass seems to be a positive factor for survival. French, European and American recommendations give precisions on follow-up, modalities of fight against the causes of malnutrition, nutritional care, mainly including the use of oral energy and protein-enriched nutritional supplements and enteral nutrition.
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