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Erythrocyte Mean Urine Volume (24-hour collection)

Published: August 9, 2026Updated: August 16, 2026

This test measures the total volume of urine produced by your red blood cells over a 24-hour period. It helps assess how well your kidneys filter and concentrate urine.

Quick summary

["This test helps evaluate kidney function and fluid balance over time."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
97154-9
Short code
EME Ur Ql Cfm
Synonyms
EME Ur Ql Cfm
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
confirm
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms like frequent urination, dehydration, or signs of kidney issues. It can also be part of a broader evaluation for conditions affecting fluid balance or kidney function.

What Does the Test Involve?

You’ll collect all urine for 24 hours in a container provided by your lab. The test measures the total volume of urine produced during this period.

Sample Preparation and Testing

The collected urine is sent to a lab, where the total volume is measured. No special preparation is needed beyond following the 24-hour collection instructions.

What Are Common Results?

Results are typically reported as a total urine volume in liters or milliliters over 24 hours. Interpretation depends on your overall health and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test can help diagnose or monitor conditions like polyuria (excessive urination), dehydration, or kidney-related disorders. Abnormal results may indicate issues with fluid retention, kidney function, or metabolic processes.

Frequently asked questions

How often should I collect urine for this test?
You’ll need to collect all urine for a full 24-hour period, starting and ending at the same time each day. Empty your bladder before starting and discard the first urine sample. Keep the container clean and refrigerate if needed.
What should I do if I miss collecting urine for part of the day?
If you miss any urine collection, you may need to restart the 24-hour period. Inform your healthcare provider immediately to avoid inaccurate results.
Can I take medications or eat certain foods before this test?
No special diet or medication restrictions apply, but avoid excessive caffeine or alcohol, as they can affect urine volume. Follow your provider’s specific instructions.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy