Phosphate disturbance in critically ill children: Incidence, associated risk factors and clinical outcomes

- Hypophosphatemia was common in the first 7 days of pediatric intensive care unit hospitalization.
- Significant association between hypophosphatemia and duration of use of mechanical ventilation.
- Hypophosphatemia was associated with prolonged pediatric intensive care unit length of stay.
- Hypophosphatemia was associated with use of furosemide, dopamine, steroid and β2 agonist.
- Good nutrition of critically ill children has an important role in improving their clinical condition.

BackgroundHypophosphatemia is one of the common disorders that develop in critically ill patients. It has potential complications and is often unrecognized in those patients.ObjectiveDetermining the incidence of hypophosphatemia in critically ill children, its association with clinical outcomes and the possible risk factors.Methods50 patients were enrolled in the study. Levels of serum phosphate were measured on day 1 and day 7 of PICU (Pediatric intensive care unit) stay. The following variables were analyzed: age, gender, diagnosis on admission, malnutrition, phosphorus intake, clinical severity score on admission OFI (Organ Failure Index) and daily scores PELOD (Pediatric Logistic Organ Dysfunction), sepsis, use of dopamine, furosemide and steroids and assessment of nutrition by z scores.ResultsThe incidence of hypophosphatemia on admission was 42%. On seventh day of admission incidence of hypophosphatemia was 62%. Malnutrition was present in 24% of patients, serum phosphorus level was significantly lower in malnourished than in well-nourished children (p value = 0.018). Hypophosphatemia was associated with prolonged PICU length of stay (p < 0.001) but was not associated with increased mortality (p = 0.13). Cases on parenteral nutrition and insufficient oral intake while on mechanical ventilator significantly showed hypophosphatemia (p = 0.017). Hypophosphatemia was associated with the use of furosemide, dopamine, steroids and β2 agonist.ConclusionHypophosphatemia was common in the first 7 days of PICU hospitalization and was associated with prolonged PICU stay, Significant association between hypophosphatemia and duration of use of mechanical ventilation, use of furosemide, dopamine, steroids and β2 agonist.