Test Detail
Interpreting Results

Content created by

Written by
Dr. Shreya Gupta
BDS, MDS - Oral and Maxillofacial Pathology
Reviewed by
Dr. Ashish Ranjan
MBBS, MD (Pharmacology)
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Osmolality - Urine

You need to provide
This test is for
Male, Female
Test Preparation
  1. No special preparation required
  2. Urine sample must preferably be the midstream urine (part of urine that comes after first and before the last stream). Collect the urine sample in a sealed and sterile container provided by our sample collection professional. Make sure that the container doesn't come in contact with your skin. Women are advised not to give the sample during the menstrual period unless prescribed.


What is Osmolality - Urine?

The number of particular chemicals in blood, urine, or faeces such as glucose, urea, and various electrolytes are measured using the Osmolality test. Electrolytes aid in the regulation of fluid levels in the body. The Osmolality test might reveal whether your body's fluid balance is unbalanced. To examine the body's fluid balance, a urine osmolality test is frequently performed in conjunction with a serum osmolality test.

A urine test might also be performed to figure out why you're urinating more or less. If you experience signs of a fluid imbalance, diabetes insipidus, or some form of poisoning, you may need a serum or urine osmolality test. Excessive thirst, nausea, vomiting, headache, disorientation, lethargy, and seizures are symptoms of a fluid imbalance and diabetes insipidus.

Why is Osmolality - Urine done?

The Urine Osmolality test is performed when one or more of the following symptoms appear:

•    Abnormal sodium level in blood

•    Lethargy

•    Excessive thirst and urination

•    Dehydration

•    Nausea

•    Chronic diarrhea

The test may also be performed when the patient has consumed methanol, spurious alcohol, etc.

Interpreting Osmolality - Urine results


Test results are expressed in mOsm/kg (miliosmoles/kg water), and the normal range for urine osmolality test is 500-850 mOsm/kg.


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