What is the stepwise approach to determining the etiology of hyponatremia?,”1. Urine osmolality (above or below 300 mmol/L, determine if there is ADH or not)2. If ADH, determine Urine Na (above or below 20 mmol/L, determine if SIADH or not)3. If not SIADH

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What is the stepwise approach to determining the etiology of hyponatremia?,”1. Urine osmolality (above or below 300 mmol/L, determine if there is ADH or not)2. If ADH, determine Urine Na (above or below 20 mmol/L, determine if SIADH or not)3. If not SIADH

determine ECF status (absolute loss vs effective volume loss)”