View source for SIADH

==Evaluation==
===Essential Criteria<ref>Schwartz WB, Bennett W, Curelop S, Bartter FC. A syndrome of renal sodium loss and hyponatremia probably resulting from inappropriate secretion of antidiuretic hormone. American Journal of Medicine 1957 23 529–542</ref>===
*Effective serum osmolality <275 mOsm/kg
*Urine osmolality >100 mOsm/kg at some level of decreased effective osmolality
*Clinical euvolaemia
*Urine sodium concentration >30 mmol/l with normal dietary salt and water intake
*Absence of adrenal, thyroid, pituitary or renal insufficiency
*No recent use of diuretic agents
===Supplemental criteria===
*Serum uric acid <0.24 mmol/l (<4mg/dl)
*Serum urea <3.6 mmol/l (<21.6mg/dl)
*Failure to correct hyponatraemia after 0.9% saline infusion
*Fractional sodium excretion >0.5%
*Fractional urea excretion >55%
*Fractional uric acid excretion >12%
*Correction of hyponatraemia through fluid restriction
==Etiology==
*Extensive differential to include categories in CNS disorders, neoplastic, pulmonary, drug-induced
*See more here - [http://emedicine.medscape.com/article/246650-overview#a5 eMedicine, etiologies]

==References==
<references/>

[[Category:FEN]]