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Urinalysis with Microscopic Examination of Sediment (Sediment Microscopy)

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

This test examines your urine under a microscope to look for cells, crystals, or other substances that may indicate health concerns.

Quick summary

["A microscopic urine check helps detect hidden problems in your kidneys, urinary tract, or overall health."]

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

Key facts at a glance

LOINC
10007-3
Short code
R wave dur L-V4
Synonyms
R wave dur L-V4
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ekg
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 Does the Microscopic Urine Check Look For?

The test checks for abnormal cells (such as red blood cells, white blood cells, or epithelial cells), crystals, casts (tubular structures), or bacteria in your urine. These can signal infections, kidney damage, or other conditions.

Common Findings and Their Possible Causes

Red blood cells (hematuria) may indicate kidney stones, urinary tract infections, or injury to the urinary tract. White blood cells (pyuria) often suggest infections. Crystals or casts could point to kidney disease or dehydration.

How Is This Test Performed?

A small sample of urine is collected and examined under a microscope. No special preparation is needed, but drinking extra water beforehand may help dilute urine for clearer results.

Why Might Your Doctor Order This Test?

Your doctor may request this test to diagnose urinary tract infections, kidney problems, bladder issues, or to monitor chronic conditions like diabetes or kidney disease.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test is critical for identifying hidden urinary or kidney issues that may not cause symptoms. Early detection can guide treatment and prevent complications.

Short name

Microscopic Urine Check

Frequently asked questions

Why do I need to drink extra water before this test?
Drinking more water helps dilute your urine, making it easier to spot abnormalities under the microscope. However, your doctor may still interpret the results based on the overall sample composition.
What if I see blood or pus in my urine at home?
Seeing blood or pus in urine can be alarming, but microscopic examination provides a clearer picture. Report any changes to your doctor, as they may need further testing to determine the cause.
Does this test hurt or cause discomfort?
No, this test involves only a urine sample collection, typically done in a bathroom. Microscopic examination is painless and done in a lab setting.
  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