Skip to content

Contrast-enhanced CT-guided aspiration of retroperitoneal fluid (fluid analysis)

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

This test involves collecting fluid from your abdomen using imaging guidance to check for infections, bleeding, or other abnormalities.

Quick summary

["A fluid analysis helps diagnose conditions like abscesses, tumors, or blood leaks in your abdomen."]

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

Key facts at a glance

LOINC
92916-6
Short code
CT Guided Retroperitoneum Asp
Synonyms
CT Guided Retroperitoneum Asp
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 doctor may recommend this test if they suspect an abnormal collection of fluid in your abdomen, such as an infection (abscess), tumor, or bleeding. Imaging like a CT scan helps pinpoint the exact location for safe fluid removal.

What Happens During the Procedure?

You’ll lie on your back while a contrast dye is injected to highlight fluid collections on the CT scan. A needle is guided through your skin to safely collect fluid from the retroperitoneal area. The fluid is then sent to the lab for analysis.

What Does the Fluid Analysis Test Check?

The lab examines the fluid for signs of infection (e.g., white blood cells), blood (e.g., red blood cells), protein, or other substances that may indicate underlying conditions like inflammation, cancer, or trauma.

Common Conditions This Test Helps Identify

This test can help diagnose retroperitoneal abscesses, pancreatic pseudocysts, hemoperitoneum (blood in the abdomen), or other fluid collections caused by surgery, trauma, or disease.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Abnormal fluid findings may signal serious conditions requiring prompt treatment, such as infections needing antibiotics or drainage procedures, or tumors needing further evaluation. Your doctor will discuss results with you based on your symptoms and medical history.

Short name

Retroperitoneal fluid analysis (CT-guided aspiration)

Frequently asked questions

How long will it take to get my results?
Fluid analysis results are typically available within 24 to 48 hours, depending on lab processing times. Your doctor will contact you once results are ready.
Will I feel pain during the procedure?
You may feel a slight pinch or pressure during the needle insertion, but the procedure is usually quick and done under imaging guidance to minimize discomfort. You can take pain relievers beforehand if needed.
Can I eat or drink before the test?
You may eat and drink normally unless instructed otherwise by your doctor. Some imaging procedures require fasting, but this test does not.
  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