Hypophosphatemia in Hospitalized Patients

Definition and Prevalence

Hypophosphatemia is defined as serum phosphate levels <0.81 mmol/L and is commonly classified as mild, moderate, and severe, with a prevalence of 60-80% among ICU patients, making it a significant clinical concern 1, 2, 3

Hypophosphatemia is associated with serious clinical consequences, including worsening respiratory failure, increased risk of prolonged mechanical ventilation, cardiac arrhythmias, prolonged hospitalization, and overall negative impact on patient outcomes 1, 2
Worsening respiratory failure is a significant consequence of hypophosphatemia 2
Increased risk of prolonged mechanical ventilation is a clinical consequence of hypophosphatemia 2
Cardiac arrhythmias are associated with hypophosphatemia 3

Phosphate balance disruption occurs through mechanisms including excessive phosphate loss 1, 2

Diuretics can precipitate hypophosphatemia 2
Refeeding syndrome can trigger significant hypophosphatemia 1, 2
Kidney replacement therapy (KRT) is a significant risk factor for hypophosphatemia, with prevalence rising to 80% during prolonged KRT modalities 1, 3
Diarrhea can contribute to hypophosphatemia through intestinal losses 1