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▷ ▶ Hyponatremia SelectSmart.com free Health flowcharts and decision trees.
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Hyponatremia
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Serum Osmolality
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<280mEq/L
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280-295mEq/L
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>295mEq/L
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Hypotonic Hyponatremia
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Isotonic Hyponatremia
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Hypertonic Hyponatremia
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Assess Volume Status
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Causes: Excessive lipids and proteins (ex. Hypertriglyceridemia, Hyperlipidemia
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Causes: Hyperglycemia, Mannitol
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Low
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Normal
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High
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Measure Urine Na+
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Psychogenic Polydipsia, SIADH, Drugs, Hypothyrodism, Glucocorticoid Deficiency
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Measure Urine Na+
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