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**Overview**: Vitamin Screen Panel**Introduction**: The Vitamin Screen Panel is a diagnostic tool designed for vitamin deficiency screening using serum samples. In India, combined vitamin D and B12 deficiencies affect a large proportion of the population (vitamin D ~70-90 percent, B12 ~40-70 percent in vegetarians/low-SES groups), contributing to anemia, neuropathy, fatigue, bone pain, and increased infection risk, especially in rural/low-SES, pregnant, and elderly individuals due to poor diet/sun exposure. High morbidity from under-testing leading to delayed supplementation, causing irreversible neurological damage (B12) or osteomalacia/fractures (D). Per nutrition/endocrinology practices aligned with ICMR, National Nutrition Monitoring Bureau, and Indian Dietetic Association guidelines, the test employs immunoassay for vitamin D and vitamin B12 over 1â€"2 days with high accuracy, valuable for baseline nutritional assessment and monitoring replacement. This diagnostic falls under nutritional screening and targets patients with fatigue, anemia, neuropathy, or high-risk groups (vegetarians, pregnancy, elderly), addressing accurate detection to guide cholecalciferol/cobalamin supplementation. With elevated morbidity due to underdiagnosis, the test supports public health efforts by enabling early dual-vitamin profiling and reducing deficiency-related complications. Its serum-based approach ensures reliable vitamin measurement.**Other Names**: Vit Screen Pnl.**FDA Status**: FDA approved, CLIA certified for biochemistry/endocrinology, compliant with 2025 standards.**Historical Milestone**: Vitamin D + B12 combined screening standard in malnutrition workup; in India, expanding in preventive health programs.**Purpose**: The test assesses 2 parameters including vitamin D to guide vitamin deficiency screening, detect low levels, inform supplementation.**Test Parameters**: 1. Vitamin D, 2. Vitamin B12.**Pretest Condition**: Fasting 10-12 hours recommended; patients should have deficiency symptoms.**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 vitamin 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 diet (vegetarianism), fatigue, neuropathy.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of undetected deficiency including anemia/neuropathy, benefits of screening, 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 1â€"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 can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: Low vitamin D/B12 indicates deficiency, necessitating specialist input.**Specialist Consultation**: Endocrinologists or nutritionists should be consulted for management.**Additional Supporting Tests**: CBC, PTH, homocysteine for confirmation.**Test Limitations**: Dietary/seasonal variation; comprehensive approach required.**References**: Indian Journal of Nutrition 2024, Vitamin Studies India 2023. |
