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Serum or Plasma Substance Concentration by Immunoassay (Bromocresol Green)

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

This test measures a specific protein or substance in your blood using a bromocresol green-based immunoassay method. It helps assess levels of certain compounds that may be involved in metabolism, immune function, or other physiological processes.

Quick summary

["This test provides important insights into your body’s chemistry that may support diagnosis or monitoring of health conditions."]

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

Key facts at a glance

LOINC
7550-7
Short code
Orange BasoBnd Ab Qn
Synonyms
Orange BasoBnd Ab Qn
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
lhr
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

The bromocresol green method detects the concentration of a particular substance in your blood, often used to quantify proteins or small molecules like bile acids, hormones, or enzymes. The test may identify imbalances linked to liver function, kidney issues, or metabolic disorders.

Why It’s Ordered

Your healthcare provider may order this test to evaluate liver function, diagnose conditions affecting protein metabolism, or monitor treatments for conditions like jaundice, bile duct obstructions, or certain endocrine disorders.

Common Conditions Monitored

While the exact analyte isn’t specified, this test could be used to track levels of substances like alkaline phosphatase (ALP), which is often elevated in liver or bone diseases, or other markers related to metabolic or immune pathways.

Sample Collection and Preparation

You’ll provide a blood sample, typically drawn from a vein in your arm. The blood is processed to separate serum (liquid part after clotting) or plasma (liquid part after anticoagulant use) for testing. Avoid eating or drinking for 2–4 hours before your test to ensure accurate results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

BCG Immunoassay (Serum/Plasma)

Frequently asked questions

How long does it take to get results?
Results are usually available within 24–48 hours, depending on lab processing times. Follow-up with your healthcare provider to discuss findings and next steps.
Can I eat or drink before this test?
Yes, but avoid food and liquids (except water) for 2–4 hours before your blood draw to prevent interference with test accuracy.
What does a high or low result mean?
Interpretation depends on the specific analyte. Elevated levels may signal liver disease, metabolic disorders, or other conditions, while low levels could indicate deficiencies or dysfunctions in the body’s regulatory systems. Always discuss results with your provider.
  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