Kidney Urine Microscopic Examination (Routine Urinalysis with Cellular Evaluation)
This test examines your urine under a microscope to check for cells, bacteria, crystals, or other substances that may indicate kidney or urinary tract health. It helps identify issues like infections, kidney stones, or inflammation.
["A microscopic urine check can reveal hidden problems in your urinary system."]
Key facts at a glance
- LOINC
- 88323-1
- Short code
- CT Guided Kidney-R Bx
- Synonyms
- CT Guided Kidney-R Bx
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- ct
- 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 This Test Is Done
Your healthcare provider may order this test if you have symptoms like frequent urination, pain while urinating, blood in urine, or unexplained weight changes. It’s also used during pregnancy, before surgeries, or as part of routine health checks to monitor kidney function.
What to Expect During the Test
You’ll collect a urine sample in a clean container, typically at home or during a clinic visit. The sample is then sent to a lab where it’s examined under a microscope by trained professionals.
Common Findings and Their Meanings
Red blood cells, white blood cells, or bacteria in urine may signal infections or kidney damage. Crystals could indicate kidney stones or metabolic issues. Casts (tubular structures) may suggest kidney disease or glomerular problems.
Preparation and Tips
No special preparation is needed, but ensure your urine is fresh. Avoid excessive alcohol, caffeine, or strong dyes (like food coloring) before testing. Clean the genital area before urinating to avoid contamination.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for diagnosing urinary tract infections, kidney diseases, diabetes, or other conditions affecting fluid balance and kidney function. Early detection can lead to timely treatment and better outcomes.
Short name
Urine Microscopy
Frequently asked questions
What does a positive result mean?
How often should I get this test?
Can I drink water before the test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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