Osmolality - urine
Normal Values
Normal values are as follows: - Random specimen: 50 to 1400 milliosmoles per kilogram (mOsm/kg)
- 12 to 14 hour fluid restriction: Greater than 850 mOsm/kg
Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What do Abnormal Results Mean?
Abnormal results are indicated as follows: Greater-than-normal measurements may indicate: Lower-than-normal measurements may indicate: - Aldosteronism (very rare)
- Diabetes insipidus (rare)
- Excess fluid intake
- Kidney failure
- Renal tubular necrosis
- Severe pyelonephritis
Additional conditions under which the test may be performed: - Complicated UTI (pyelonephritis)
- High blood sodium level
- Low blood sodium level
- Excessive urination
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