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Clinical Pathology Kidney Home collection available

Osmolality, Urine

Parameters1 tested
SampleUrine
FastingNot required
Report in24-48 hrs

How to prepare

No fasting needed

You can eat and drink normally before the test.

Good to know

Collect the first morning urine sample in the sterile container we give you.

Medicines

Tell our phlebotomist about any medicines you take. Don't stop them without asking your doctor.

Comfortable clothes

Wear a loose sleeve so the sample can be taken easily from your arm.

How it works

Book onlinePick a time slot
Home visitSealed, sterile kit
Lab testingBarcode tracked
ReportIn 24-48 hrs

About this test

Urine osmolality measures how concentrated your urine is. It shows how well the kidneys hold or release water.

Why is this test done?

  • Investigate low or high sodium
  • Investigate passing large amounts of urine
  • Check kidney concentrating ability

Symptoms — when should you get tested?

  • Excess thirst and urination
  • Confusion due to sodium problems
  • Dehydration

Normal range

Random 50 – 1200 mOsm/kg
After overnight fluid restriction > 850 mOsm/kg

Reference ranges differ slightly between labs, methods, age and sex. Always discuss your report with your doctor.

If your result is high

High urine osmolality means concentrated urine.

Common reasons
  • Dehydration
  • SIADH
  • Heart failure
  • Sugar in urine

If your result is low

Low urine osmolality means dilute urine.

Common reasons
  • Drinking a lot of water
  • Diabetes insipidus
  • Kidney disease

How is the test done?

  1. 1
    Book online

    Choose your slot for home collection or a visit to our centre.

  2. 2
    Give a urine sample

    Collect a mid-stream urine sample in the sterile container we give you (first morning urine is best).

  3. 3
    Tested in our lab

    Your barcoded sample is tested on automated machines with strict quality checks.

  4. 4
    Report on WhatsApp

    A pathologist checks the result and the report reaches you on WhatsApp and email.

Frequently asked questions

No fasting is needed for this test. You can eat and drink normally.

Your report is usually ready in 24-48 hrs after the sample reaches our lab. We send it on WhatsApp and email, and you can also download it from the Reports page.

Please call our team to confirm whether home sample collection is available for your location and test.

This test needs a urine sample. Collect the first morning urine sample in the sterile container we give you.

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