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Urinalysis with Microscopic Examination of Sediment (Upper Urinary Tract)

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

This test examines urine collected from the upper urinary tract (e.g., kidney or ureter) to check for cells, crystals, or other substances that may indicate infection, blockage, or other conditions.

Quick summary

["A urine check for hidden issues in your kidneys or tubes connecting them to your bladder."]

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

Key facts at a glance

LOINC
36030-5
Short code
MR Upper arm-R
Synonyms
MR Upper arm-R
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 microscopic components in urine, including red blood cells, white blood cells, bacteria, crystals, or abnormal cells that could signal kidney stones, infections, or other problems in the upper urinary tract. This may involve a 24-hour urine collection or a sample from a specialized procedure.

Why It’s Done

Your healthcare provider may order this test to diagnose or monitor conditions like kidney stones, urinary tract infections, structural abnormalities, or kidney disease. It helps identify substances that aren’t normally present in urine.

Sample Collection Process

You’ll likely collect a midstream clean-catch urine sample (if from the bladder) or follow specific instructions for a sample from the upper urinary tract, such as a catheter or specialized catheterization. If a 24-hour urine is required, you’ll collect all urine over a full day.

Preparation Tips

Avoid certain medications or foods that could interfere with results (e.g., vitamin C supplements). Follow your provider’s instructions carefully to ensure accurate results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test plays a critical role in detecting abnormalities in the upper urinary tract, such as infections, stones, or inflammation. Early identification can lead to timely treatment and better outcomes. Results may guide decisions about further imaging or medical interventions.

Short name

Upper Urinary Tract Urine Analysis

Frequently asked questions

Why might I need this test?
Your doctor may recommend it if you have symptoms like pain in your back or side, frequent urination, blood in urine, or if they suspect kidney or ureter issues.
How long will it take to get results?
Results are typically available within a few days to a week, depending on lab processing and your healthcare provider’s workflow.
Can I eat or drink before this test?
Yes, you can eat and drink normally unless your provider specifies otherwise. Some tests may require fasting, but this test does not.
  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