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Hyponatremia (Urine osmolality (Range: 50-1800, Normal w/ fluid…
Hyponatremia
Urine osmolality
Range: 50-1800
Normal w/ fluid restriction: >800
Normal w/o fluid restriction: 500-800
Maximal dilution: 50
Serum osmolality
Hypotonic
Hypervolemic
Non-renal
Cirrhosis
CHF
Nephrotic syndrome
Renal
ATN
Euvolemic
Hypothyroidism
Adrenal insufficiency
Psychogenic poly
SIADH
Hypovolemic
Non-renal
Vomiting, diarrhea
Renal
Diuretics, hypoaldosteronism
Isotonic
Renal
Non-renal
Hypertonic
Renal
Non-renal