- Hyponatremia with serum hypo-osmolarity
- Urine that is less than maximally dilute when compared with serum osmolality (ie, a simultaneous urine osmolality that is greater than the serum osmolality
- Inappropriately large amounts of urine Na (Ua > 20 mmo/L);
- Normal Renal function;
- Normal Thyroid function
- Normal Adrenal function;
- Patient not on Diuretics