Above the range
Common causes of a high Osmolality, Serum
- Dehydration
- Hypernatremia
- Hyperglycemia
- Toxic alcohol ingestion (osmolar gap)
Looking for the other direction? See what causes a low Osmolality, Serum.
All tests · Inflammatory & Other Chemistry · Osmolality, Serum
Above the range
What causes a high Osmolality, Serum?
Normal range 275-295 mOsm/kg (275-295 mmol/kg SI). Specimen: Serum. See the full Osmolality, Serum reference page for critical values and nursing considerations.
What is the normal range for Osmolality, Serum?
The standard teaching reference range for Osmolality, Serum is 275-295 mOsm/kg in conventional units, or 275-295 mmol/kg in SI units. This value is measured in serum.
| Specimen | Serum |
|---|---|
| Conventional range | 275-295 mOsm/kg |
| SI range | 275-295 mmol/kg |
| Critical value | < 265 or > 320 mOsm/kg |
| Panel | Inflammatory & Other Chemistry |
Full details, including nursing considerations, on the Osmolality, Serum normal range page. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
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