Osmolality (Urine)
The Osmolality (Urine) test measures the concentration of particles in urine, providing information about the kidney's ability to concentrate or dilute urine. Clinicians order this test to evaluate hydration status, kidney function, and electrolyte balance. It is typically used in clinical situations such as assessing dehydration, monitoring patients with diabetes insipidus, or evaluating conditions that may affect kidney function. The Osmolality (Urine) test can also help in diagnosing certain diseases and guiding treatment decisions.
Test Essentials
Specimen Required
2 mL fresh random urine. No preservative.
Test Category
Chemistry
Turnaround Time
Results for the Osmolality (Urine) test are typically available within 24–48 hours after sample collection.
Clinical Information
Clinical Significance
Abnormal results from the Osmolality (Urine) test may indicate various health issues. High osmolality can suggest dehydration, while low osmolality may indicate overhydration or certain kidney problems. The diagnostic value of the Osmolality (Urine) test lies in its ability to provide insights into kidney function and fluid balance. Remember, only a healthcare provider can interpret these results within the context of your overall health and medical history.
Reference Ranges
Reference ranges for the Osmolality (Urine) test can vary based on age, sex, and laboratory methods. Generally, a normal range for urine osmolality is between 300 to 900 mOsm/kg. However, these values should be interpreted in the context of your overall health and hydration status. Always consult with your healthcare provider for specific ranges and what they mean for you.
Sample Preparation
Before your Osmolality (Urine) test, there are generally no special preparation requirements. You can continue your normal diet and medication regimen unless instructed otherwise by your healthcare provider. It is important to collect a fresh random urine sample for accurate results. Follow any specific instructions given to you by your doctor regarding fluid intake or medication adjustments prior to the test.
Related Tests
Code: 0212
Code: 0230
Code: P0204
Frequently Asked Questions
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