Hyponatremia Diagnosis Algorithm UOsm ≥ POsm - Vasopressin-Dependent • UNa < 20 mEq/L - Appropriate (↓ EABV) - Consider: Hypovolemia, Heart failure, Cirrhosis • UNa > 30mEq/L - Inappropriate - Consider: SIADH, Cortisol deficiency UOsm < POsm - Vasopressin-independent - Consider: Primary polydipsia, Low solute intake, Renal insufficiency by Helbert Rondon, MD @NephroMD #hyponatremia #diagnosis #differential #algorithm #causes #nephrology
