Normal Values:

In general, normal values are as follows:

• 1.0002 to 1.030 (normal specific gravity)
• 1.001 after drinking excessive amounts of water
• More than 1.030 after avoiding fluids
• Concentrated after receiving ADH

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

What abnormal results mean:

Increased urine concentration may indicate:

• Dehydration
• Diarrhea that leads to dehydration
• Excessive sweating that leads to dehydration
• Glycosuria
• Heart failure (related to decreased blood flow to the kidneys)
• Renal arterial stenosis
• Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
• Vomiting
• Water restriction

Decreased urine concentration may indicate:

• Excessive fluid intake
• Diabetes insipidus
• Renal failure (loss of ability to reabsorb water)
• Pyelonephritis

Additional conditions under which the test may be performed:

• Complicated UTI (pyelonephritis)
• Nephrogenic diabetes insipidus