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Guided drainage fluid protein concentration (qualitative)

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

This test evaluates the protein content in fluid collected from a guided drainage procedure, such as a chest tube or other drainage catheter. It helps assess conditions like fluid accumulation, infection, or inflammation.

Quick summary

["This test helps doctors understand whether fluid drainage is effective and if there are signs of infection or other issues."]

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

Key facts at a glance

LOINC
43537-0
Short code
RF Guided Drain+cath place
Synonyms
RF 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
rf
CPT
86430
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 Is This Test Measuring?

The test measures the **protein concentration** in the fluid removed from your body through a guided drainage procedure. Proteins are important molecules that help with healing, immune response, and maintaining fluid balance. High or low protein levels can indicate different health concerns.

Why Might You Need This Test?

Your doctor may order this test if you have a drainage tube (like a chest tube) in place to remove fluid from a cavity, such as the chest, abdomen, or other body areas. It helps determine if the fluid is clear of infection, if it’s the right type of fluid (like pus or blood), or if additional treatment is needed.

How Is the Sample Collected?

The fluid is collected directly from the drainage tube during a procedure. No additional blood draw or special preparation is needed beyond what’s required for the drainage itself. The sample is sent to a lab for analysis.

What Does the Result Mean?

The result is reported as a **qualitative** (yes/no or descriptive) assessment of protein presence. High protein levels might suggest infection, inflammation, or abnormal fluid composition, while low levels could indicate normal drainage or other underlying issues. Your doctor will interpret the result in the context of your symptoms and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How long will it take to get results?
Results are typically available within 24 to 48 hours, depending on lab processing times. Your doctor will contact you once the results are ready.
What are common reasons for abnormal results?
Abnormally high protein levels in drainage fluid may indicate infection (e.g., bacterial or fungal), inflammation, or tissue damage. Abnormally low levels could suggest normal drainage or conditions like pleural effusion without infection. Your doctor will discuss these findings with you based on your clinical picture.
Do I need to prepare for this test?
No special preparation is needed beyond what’s required for your drainage procedure. Avoid smoking or certain medications (if instructed) to help ensure accurate results, but this test specifically does not require dietary or lifestyle restrictions.
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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