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Urinalysis with Microscopic Examination of Sediment (Upper Urinary Tract)

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

This test examines a sample of your urine under a microscope to check for cells, crystals, or other substances that may indicate kidney or upper urinary tract issues.

Quick summary

["Microscopic urine analysis helps detect hidden problems in your kidneys or bladder."]

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

Key facts at a glance

LOINC
36025-5
Short code
MR Upper arm
Synonyms
MR Upper arm
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

The test looks for abnormal cells (such as red blood cells, white blood cells, or epithelial cells), crystals, casts, or other particles in your urine. These can signal infections, stones, inflammation, or structural changes in the kidneys or upper urinary tract.

Common Findings and Their Possible Causes

Red blood cells or white blood cells might suggest kidney damage, infection, or bleeding. Crystals or casts could indicate kidney stones, urinary tract infections, or other conditions affecting kidney function.

Preparation and Sample Collection

No special preparation is needed, but a clean-catch urine sample is typically collected to avoid contamination. If you’re using a catheter, your sample will be taken directly from the bladder.

When You Might Need This Test

Your doctor may order this test if you have symptoms like pain during urination, blood in urine, frequent infections, or if you’re at risk for kidney stones or urinary tract issues.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is crucial for diagnosing and monitoring conditions like urinary tract infections, kidney stones, interstitial cystitis, or glomerular diseases. Early detection can guide treatment and prevent complications.

Short name

Upper Urine Microscopy

Frequently asked questions

Why might my urine test show unusual cells or substances?
Unusual cells or substances in urine can be caused by infections, kidney damage, stones, or other health conditions. Your doctor will discuss your symptoms and test results to determine the best next steps.
Is there anything I should avoid before this test?
Avoid excessive use of certain medications (like NSAIDs) or strong perfumes near your genitals 24 hours before testing, as they may affect results. Drink plenty of water to help with sample collection.
How long does it take to get results?
Results are usually available within 24 to 48 hours, depending on your lab’s processing time. Your doctor will contact you with the findings once they’re ready.
  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