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Serum osmolality measures the concentration of dissolved particles in your blood, reflecting your body's fluid balance. It is primarily determined by sodium, glucose, and urea. Abnormal values indicate disrupted fluid homeostasis or the presence of unmeasured osmoles from toxic alcohols.
Also known as: Osm, Osmolality, Plasma Osmolality, Serum Osmolality
High osmolality indicates dehydration, uncontrolled diabetes, or toxic alcohol ingestion. Low osmolality results from overhydration or SIADH.
Standard range is 275-295 mOsm/kg. Functional optimal is 280-290 mOsm/kg.