Tests
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Osmolality, Serum
| Test Name: | Osmolality, Serum | ||
| Epic Order Code: | LAB107 | ||
| CPT Code: | 83930 | ||
| Specimen(s) Type: | Serum | ||
| Acceptable Container(s): |   Tops are gold and red. | ||
| Testing Schedule: | 24 hrs/day, 7 days/week | ||
| Turn Around Time: | STAT: 1 hour | ||
| Routine: 2 hours | |||
| Collection Information: | No special patient preparation is required. Obtain specimen by standard collection procedures. | ||
| Transport Information: | Deliver to lab immediately. All specimens must be signed into the laboratory. | ||
| Reference Clients: | If unable to deliver to the lab within 1 hour, centrifuge the specimen and remove serum from the red cells. Store and transport at 2-8° C. Specimen must be received in the lab within 24 hours. | ||
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport. | ||
| Reference Range: | 280 - 295 mOsm/kg | ||
| Critical Values: < 250 or > 325 mOsm/kg | |||
| Additional Information: | Additives such as anticoagulants from collection tubes may contribute significantly to the measured osmolality. | ||