Hypophosphatemia is a common complication in severely disabled individuals with neurological disorders and is caused by infection, refeeding and Fanconi syndrome

2014 
Aim: To describe the characteristics of hypophosphatemia in severely disabled individuals with neurological disorders and to identify its causative factors. Method: We retrospectively reviewed clinical data from 82 individuals with motor skills classified as sitting, rollover or bedridden. Age, gender and body mass index were compared in individuals with (n = 19) and without (n = 63) a history of hypophosphatemia (serum phosphate levels <2.0 mg/dl). The clinical course of each patient with hypophosphatemia was reviewed and the cause identified. Laboratory data during hypophosphatemia was compared with that after recovery. Results: The age, gender and body mass index did not differ significantly between the individuals with and without hypophosphatemia. Nineteen patients experienced 25 episodes of hypophosphatemia. The causes included febrile illnesses (n = 17), refeeding syndrome (n = 4) and Fanconi syndrome (n = 3), but was unidentifiable in one episode. Significant elevations in C-reactive protein levels and reductions in sodium levels were observed during hypophosphatemia episodes. Interpretation: Hypophosphatemia is a common complication in severely disabled individuals with frequent bacterial infections, refeeding following malnutrition and valproate administration for epilepsy treatment. Because severe hypophosphatemia is life threatening, serum phosphate levels should be closely monitored in this population.
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