OSMOLALITY, URINE

What this test checks

Measures the concentration of urine, paired with blood osmolality to evaluate how well kidneys handle water.

Why do people get this test?

Used to investigate unexplained low sodium or unusual urination patterns.

When you should consider this test

• Excessive urination of unclear cause
• Low blood sodium investigation
• Specialist requested

How to prepare

Collect urine as instructed at collection.