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C-reactive protein (CRP) in appendix abscess drainage fluid via catheter

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

This test measures the level of C-reactive protein (CRP) in fluid collected from your appendix area through a catheter. CRP is a protein produced by your body in response to inflammation.

Quick summary

["CRP helps assess infection or inflammation in your appendix area after drainage."]

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

Key facts at a glance

LOINC
42280-8
Short code
CT Guided Appendix Absc drain+cath place
Synonyms
CT Guided Appendix Absc 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 Is This Test Done?

Your healthcare provider may order this test if you have an appendix abscess (a localized infection in the appendix) and need to monitor inflammation or infection in the fluid drained from the area. It helps guide treatment decisions, such as whether antibiotics or further drainage are needed.

What Does CRP Measure?

CRP is a marker of inflammation. Higher levels may indicate active infection or ongoing inflammation in the appendix area. This test is not specific to the appendix but reflects your body’s response to infection or injury.

How Is the Sample Collected?

A catheter is inserted into the appendix area to drain fluid. The collected fluid is then sent to the lab for testing. The test measures CRP concentration in this drainage fluid.

What Does a High CRP Level Mean?

Elevated CRP levels in drainage fluid suggest ongoing inflammation or infection. This can help your doctor determine if antibiotics are needed, if the infection is improving with treatment, or if further drainage is required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: CRP in drainage fluid is critical for monitoring the progression of an abscess. It helps differentiate between resolving infection and persistent inflammation, guiding timely medical interventions to prevent complications like abscess rupture or sepsis.

Short name

CRP in drainage fluid

Frequently asked questions

Will I feel pain or discomfort during the test?
You may experience mild discomfort or pressure during the drainage procedure, but it is usually brief. Your healthcare provider will explain the process and ensure you are comfortable. Pain medication may be offered if needed.
How soon will I get results, and what do they mean?
Results are typically available within 24 to 48 hours. Your doctor will discuss the findings with you, including whether CRP levels are high, low, or within expected ranges for your condition. They will interpret the results in the context of your overall health and treatment plan.
Can I eat or drink before this test?
No special preparation is needed for this test. You can eat, drink, and continue your normal activities unless instructed otherwise by your healthcare provider. The drainage procedure itself does not require fasting.
  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