Precision Insights into Liver Health and Bile Duct Function
Bilirubin (BR) is a red-orange compound that occurs in the normal catabolic pathway that breaks down heme in vertebrates. This catabolism is a necessary process in the body's clearance of waste products that arise from the destruction of aged or abnormal red blood cells.[3] In the first step of bilirubin synthesis, the heme molecule is stripped from the hemoglobin molecule. Heme then passes through various processes of porphyrin catabolism, which varies according to the region of the body in which the breakdown occurs.
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How our test process works!
Overview
The Bilirubin (D/I) test measures the levels of direct (conjugated) and indirect (unconjugated) bilirubin in the blood. Bilirubin is a yellowish pigment produced when red blood cells break down. The liver processes bilirubin to be excreted through bile.
Risk Assessment
This test is primarily used to:
- Diagnose liver diseases (e.g., hepatitis, cirrhosis)
- Identify bile duct obstruction (e.g., gallstones, tumors)
- Detect hemolysis (excessive breakdown of red blood cells)
- Evaluate newborn jaundice.
Normal Range (May vary by lab)
- Total Bilirubin: 0.1 – 1.2 mg/dL
- Direct Bilirubin: 0.0 – 0.3 mg/dL
- Indirect Bilirubin: Calculated as (Total – Direct)
Interpretation of Results
- Total Bilirubin = Indirect + Direct Bilirubin
- Indirect (Unconjugated) Bilirubin: Produced from red blood cell breakdown; high levels may indicate hemolysis or Gilbert’s syndrome.
- Direct (Conjugated) Bilirubin: Processed by the liver; elevated levels suggest liver disease or bile duct obstruction.
Possible Causes of Abnormal Results
🔴 Elevated Indirect Bilirubin:
- Hemolytic anemia
- Liver diseases (hepatitis, cirrhosis)
- Gilbert’s syndrome (benign enzyme deficiency)
🔴 Elevated Direct Bilirubin:
- Bile duct obstruction (gallstones, tumors)
- Liver conditions (hepatitis, cirrhosis)
- Dubin-Johnson syndrome (rare genetic disorder).
Sample Type
Blood Sample (Serum or Plasma)
- Collected via venipuncture
- Requires fasting (in some cases)
Frequently Asked Question
Bilirubin (D/I)
Precision Insights into Liver Health and Bile Duct Function
Bilirubin (BR) is a red-orange compound that occurs in the normal catabolic pathway that breaks down heme in vertebrates. This catabolism is a necessary process in the body's clearance of waste products that arise from the destruction of aged or abnormal red blood cells.[3] In the first step of bilirubin synthesis, the heme molecule is stripped from the hemoglobin molecule. Heme then passes through various processes of porphyrin catabolism, which varies according to the region of the body in which the breakdown occurs.
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