Serum or Plasma Substance Concentration (Bromocresol Green Dye Binding)

What This Test Measures

The test uses bromocresol green dye, which binds to specific proteins in your blood. When the dye binds, it changes color, allowing the lab to estimate protein levels or liver function indirectly. This method is less common today but may still be used in certain clinical contexts.

Why It Might Be Ordered

Your healthcare provider may order this test if they suspect liver disease, protein disorders, or other conditions affecting protein synthesis. It can also be part of a broader evaluation for conditions like cirrhosis or malnutrition.

Sample Collection and Preparation

Blood is drawn from a vein, typically in your arm. The sample is processed to separate serum or plasma, which is then tested for dye binding properties. Results are compared to reference ranges for the protein concentration being assessed.

Interpretation of Results

Results are interpreted based on how much dye binds to proteins. Lower binding may indicate liver dysfunction or reduced protein production, while higher binding could suggest normal or elevated protein levels. Always discuss results with your provider.