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Guided Drainage Catheter Placement Evaluation (Urinary System Function Assessment via Urine Analysis)

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

This test evaluates whether your urinary drainage system is working properly after a catheter is placed. It checks for signs of blockage, infection, or other issues in the urinary tract.

Quick summary

["This test helps ensure your catheter is correctly positioned and your urinary system is functioning as expected."]

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

Key facts at a glance

LOINC
35922-4
Short code
CT Guided Drain+cath place
Synonyms
CT Guided Drain+cath place
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 pain, difficulty urinating, or signs of infection after a catheter is inserted. It may also be used to confirm proper drainage or detect complications like urinary retention or obstruction.

What to Expect Before the Test

No special preparation is needed. You may be asked to urinate into a container before or after the catheter placement to collect a sample for analysis. If you’re using a catheter, the test may be done during routine follow-up.

What the Test Involves

A small urine sample is collected (either before or after catheter placement) to check for substances like bacteria, white blood cells, or other markers that could indicate infection, blockage, or other urinary issues. The test may also assess drainage clarity or flow.

Possible Results and Their Meaning

Results may show normal drainage, signs of infection (e.g., bacteria or white blood cells), or other abnormalities like crystals (which could indicate kidney stones) or unusual pH levels. Your provider will interpret these findings in the context of your symptoms and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

What causes abnormal results?
Abnormal results may suggest urinary tract infection, catheter-related complications, obstruction, or other urinary system issues. For example, high white blood cells could indicate infection, while crystals or sediment might suggest kidney stones or other blockages.
How long will results take?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will contact you once they have the findings.
Can I drink fluids before the test?
Yes, you can drink fluids as usual unless instructed otherwise by your provider. Hydration helps support normal urine flow and may affect test results, but it won’t interfere with the catheter placement evaluation itself.
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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