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Bilirubin, Body Fluid — Substance Concentration

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

Measures the concentration of bilirubin in a body fluid to help assess bile pigment levels and possible liver or drainage-related problems.

Quick summary

["An elevated bilirubin concentration in a body fluid may indicate liver dysfunction or impaired bile drainage."]

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

Key facts at a glance

LOINC
29767-1
Short code
Bilirub Fld-sCnc
Synonyms
Bilirub Fld-sCnc
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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?

This test measures bilirubin, a yellow pigment made during the breakdown of red blood cells, in a sample of body fluid. The fluid source is identified by your healthcare professional.

Why might I need this test?

It may be ordered when fluid is collected from an area of the body to evaluate jaundice, liver disease, bile leakage, or the function of a drainage or shunt. The results can also help monitor an existing condition.

How is the test performed?

A laboratory analyzes the submitted fluid using a validated chemical or immunoassay method. The report provides the bilirubin concentration together with the fluid type, units, and the laboratory's reference information.

How do I prepare for the test?

Preparation depends on how and where the fluid is collected. Follow your clinician's instructions about fasting, medications, and the collection procedure. If the fluid is obtained by drawing blood, you may need to fast for the related blood test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A higher bilirubin concentration in fluid may occur with liver dysfunction, obstruction or leakage of bile, inflammation, or red blood cell breakdown. The meaning depends on the type and source of the fluid and should be interpreted with other laboratory findings and your clinical situation. An unexpectedly high or low result may require repeat testing or further evaluation.

Short name

Bilirubin, Fluid

Frequently asked questions

Is this the same as a serum bilirubin test?
No. A serum bilirubin test measures bilirubin in blood, while this test measures it in the specific body fluid submitted for analysis.
Why was fluid collected from my body?
Fluid may be collected to assess drainage, swelling, infection, liver function, or another clinical concern. Your healthcare professional can explain the reason and the collection site.
Does an abnormal bilirubin level confirm a diagnosis?
No. An abnormal result can suggest several conditions but must be interpreted with symptoms, examination findings, and other test results. Your clinician can explain what the result means in your case.
  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