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Fluorescein and Vital Dye Screening in Serum (for Visualization of Liver Function)

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

This test measures how your liver processes certain fluorescent dyes, which helps assess liver function and bile flow.

Quick summary

["A liver test to check how well your liver removes substances from your blood."]

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

Key facts at a glance

LOINC
110819-0
Short code
FLUCV Ab Msmt Ser
Synonyms
FLUCV Ab Msmt Ser
Category
chemistry
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

Why This Test Is Done

Your healthcare provider may order this test if you have symptoms like jaundice (yellowing of skin/eyes), unexplained fatigue, or if liver tests from a blood draw show abnormal results. It can also help diagnose conditions like bile duct blockages or liver diseases.

How the Test Works

A fluorescent dye (fluorescein) is injected into a vein. A special camera then measures how quickly the dye leaves your bloodstream and enters bile. The test checks how efficiently your liver processes and removes the dye.

Sample Collection

Blood is drawn from a vein (usually in your arm) before and after dye injection. Serum is collected for analysis.

What to Expect Before the Test

No special preparation is needed, but inform your provider about any medications (especially liver-related ones) or allergies to dyes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fluorescein dye test (serum)

Frequently asked questions

What does a normal result mean?
A normal result suggests your liver is processing the dye efficiently, which may indicate healthy bile flow and liver function. However, this test alone doesn’t diagnose liver disease—additional tests may be needed.
Can this test replace a liver function blood test?
No, this test is different from standard liver function blood tests (like ALT or bilirubin). It specifically evaluates bile flow and liver dye clearance, often used alongside other tests for a full assessment.
How long does it take to get results?
Results are typically available within 24–48 hours, depending on lab processing time. Your provider will discuss them with you during follow-up.
  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