SODIUM HOMEOSTASIS


Hyponatremia

  • 95-98% of total body Na is extracellular; Na accounts for 90% of extracellular osmolality
  • Requirements: 75 mEq or 3-4mEq/kg/d
  • For every increase of 100mg/dl in serum [glu] beyond 100mg/dl, serum [Na] falls about 1.6mEq/l