Hyponatremia:Quick W/up

• 1)Confirm Hyponatremia

• 2)Serum Osm Nl (275-290) Pseudohyponatremia (Prot/Lipids)

• <275

• 3)Urine Osm < 100 Polydipsia (Beer Potomania, Tea-toast)

• 4)Urine Sodium > 20 Euvolemic: SIADH

• Hypothyroidism, Cort def <20 Hypovolemic: Diuretic, Aldo deficiebncy,

• Salt-loosing Nephropathy

• Hypervlemic: Renal Failure

• Hypovolemic * Dehydration, GI fluid loss

• Hypervlemic Cardiac, Liver, Renal (nephrotic syndrome

• NB Restoring euvolemia in a patient who presents with hypovolemic hyponosmolar hyponatremia may reveal SIADH