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Microscopic examination of urine sediment (microscopic urinalysis)

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

This test examines the cells and particles found in your urine under a microscope. It helps identify signs of infection, kidney issues, or other health problems.

Quick summary

["A microscopic urine check can reveal hidden problems in your urinary system."]

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

Key facts at a glance

LOINC
57764-3
Short code
Microscopic Mar-Imp
Synonyms
Microscopic Mar-Imp
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
cytology
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

Why is this test done?

Your doctor may order this test if you have symptoms like frequent urination, pain while urinating, cloudy or strong-smelling urine, or if you have a fever. It’s also used to monitor kidney function, detect infections, or check for conditions like diabetes or kidney stones.

What happens during the test?

You’ll provide a urine sample, typically collected in the morning. The sample is then examined under a microscope to look for red blood cells, white blood cells, bacteria, crystals, or other abnormal substances.

What might abnormal results mean?

Red blood cells could indicate bleeding in the urinary tract or kidney damage. White blood cells suggest a urinary tract infection. Crystals or stones may point to kidney stones, while casts could signal kidney disease. Always discuss any abnormal findings with your healthcare provider.

How do I prepare for this test?

No special preparation is needed. Avoid using strong perfumes, deodorants, or feminine hygiene products near the urine collection area to avoid false results. Drink plenty of water the day before if your doctor advises it.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine sediment check

Frequently asked questions

What does a positive result mean?
A positive result means your urine contains abnormal cells, particles, or substances that may signal an infection, kidney issue, or other health concern. Your doctor will interpret the results and recommend next steps, such as further testing or treatment.
How often should I get this test?
Frequency depends on your health. Your doctor may recommend this test periodically if you have a history of urinary issues, kidney disease, or other conditions that affect the urinary system. Follow their guidance.
Can I drink alcohol before this test?
Alcohol may not affect this test directly, but it can impact overall health and test results indirectly. If your doctor has specific instructions, follow them. Otherwise, moderate alcohol use is generally safe.
  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