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**Overview**: Immunoglobulin Profile Panel**Introduction**: The Immunoglobulin Profile Panel is a diagnostic tool designed to assess immunoglobulin levels using serum samples. In India, immunoglobulin deficiencies (IgG, IgA, IgM) cause recurrent sinopulmonary/GI infections, with selective IgA deficiency most common (~1 in 500â€"700) and common variable immunodeficiency (CVID) leading to autoimmunity and malignancy. High morbidity from under-testing in rural/low-SES patients with chronic infections, limited labs, delayed IVIG leading to bronchiectasis or sepsis. Per immunology practices aligned with ICMR and Indian Society for Primary Immune Deficiency guidelines, the test employs immunoassay for IgG, IgA, and IgM over 1-2 days with high accuracy, valuable for diagnosing humoral immunodeficiency. This diagnostic falls under immune profiling and targets patients with recurrent infections or family PID history, addressing accurate detection to guide IVIG replacement and monitoring. With elevated morbidity due to underdiagnosis, the test supports public health efforts by enabling precise antibody assessment and reducing infection complications. Its serum-based approach ensures reliable quantification.**Other Names**: Ig Profile Pnl.**FDA Status**: FDA approved, CLIA certified for immunology, compliant with 2025 standards.**Historical Milestone**: Ig profile standard; in India, used in PID clinics.**Purpose**: The test assesses 3 parameters including IgG to guide immunoglobulin evaluation, detect deficiencies, inform replacement therapy.**Test Parameters**: 1. IgG, 2. IgA, 3. IgM.**Pretest Condition**: No fasting required; patients should report recurrent infections.**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 infection sites, autoimmunity, family history.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of undiagnosed Ig deficiency including sepsis, benefits of profiling, and minimal discomfort from venipuncture.**Procedural Considerations**: The test involves sample processing using immunoassay 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.**Factors Affecting Result Accuracy**: Delays beyond stability periods, improper storage conditions, hemolysis, or age can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: Low IgG/IgA/IgM indicates humoral deficiency, necessitating specialist input.**Specialist Consultation**: Immunologists should be consulted for management.**Additional Supporting Tests**: Vaccine response, lymphocyte subsets for confirmation.**Test Limitations**: Age/reference range dependent; comprehensive approach required.**References**: Indian Journal of Pediatrics 2024, PID Studies India 2023. |
