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**Overview**: Bilirubin Panel**Introduction**: The Bilirubin Panel is a diagnostic tool designed to assess liver function using serum samples. In India, liver disorders (hepatitis, cirrhosis, NAFLD) affect millions, with hyperbilirubinemia common in viral hepatitis (prevalence ~1-2 percent acute), alcoholic liver disease, and Gilbert's syndrome. Total/direct/indirect bilirubin differentiation helps identify pre-hepatic, hepatic, or post-hepatic causes. High morbidity from underdiagnosis in rural areas, limited hepatology access, overlap with infections, delayed treatment leading to jaundice complications or liver failure. Per biochemistry practices aligned with ICMR and INASL guidelines, the test employs spectrophotometry for fractionated bilirubin analysis over 1-2 days with high sensitivity/specificity, valuable for initial liver evaluation. This diagnostic falls under liver function screening and targets patients with suspected liver disease, addressing accurate detection to guide further testing and management. With elevated morbidity due to underdiagnosis, the test supports public health efforts by enabling precise identification and reducing progression. Its serum-based approach ensures reliable detection.**Other Names**: Bilirubin Pnl.**FDA Status**: FDA approved, CLIA certified for biochemistry, compliant with 2025 standards.**Historical Milestone**: Standard liver function test; in India, widely used in hepatitis screening.**Purpose**: The test assesses 3 parameters including total bilirubin to guide liver function evaluation, differentiate jaundice causes, inform further investigation.**Test Parameters**: 1. Total Bilirubin, 2. Direct Bilirubin, 3. Indirect Bilirubin.**Pretest Condition**: Fasting 10-12 hours recommended; patients should report jaundice, dark urine, fatigue, abdominal pain.**Specimen**: 3 mL serum in 1 SST, transported within specified times to maintain sample viability.**Sample Stability at Room Temperature**: 8 hours with proper handling to preserve analyte integrity, ensuring reliable test performance.**Sample Stability at Refrigeration**: 7 days at 2-8 degrees Celsius, suitable for short-term storage before laboratory processing, though immediate testing is preferred.**Sample Stability at Frozen**: 6 months at -20 degrees Celsius, allowing long-term storage for retesting, though freezing may affect some analytes.**Medical History**: Patients should provide details on jaundice, alcohol use, viral exposure, family liver disease history.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of untreated liver disorders including failure, benefits of early detection, and minimal discomfort from venipuncture.**Procedural Considerations**: The test involves sample processing using spectrophotometry by trained personnel to ensure sterile technique, avoid hemolysis, and interpret results within 1-2 days using provided controls. Laboratories must maintain a controlled environment, adhere to quality assurance protocols, and store kits according to manufacturer specifications to ensure reliability.**Factors Affecting Result Accuracy**: Delays beyond stability periods, improper storage conditions, hemolysis, or recent meals can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: Abnormal bilirubin indicates liver dysfunction, necessitating specialist input. Normal may require follow-up if symptoms persist.**Specialist Consultation**: Hepatologists or gastroenterologists should be consulted for management.**Additional Supporting Tests**: Liver enzymes, ultrasound for confirmation.**Test Limitations**: May not identify cause; comprehensive approach required.**References**: Indian Journal of Gastroenterology 2024, Liver Function Studies India 2023. |
