Overview: Prealbumin TestIntroduction: The Prealbumin Test measures prealbumin to diagnose malnutrition or liver issues, causing fatigue. Following 2023 ASPEN guidelines, it uses biochemical methods for high specificity, supporting metabolic screening. This test is critical for guiding diagnosis, treatment planning, and improving outcomes in biochemistry for patients with suspected malnutrition or liver dysfunction.
Other Names: Prealbumin Assay, Transthyretin Test.
FDA Status: Laboratory-developed test (LDT), meeting biochemistry standards for diagnostic accuracy.
Historical Milestone: Prealbumin testing began in the 1970s with malnutrition research. Biochemical methods improved in the 2000s, enhancing diagnostic precision.
Purpose: Measures prealbumin to diagnose malnutrition or liver issues, guides treatment, and evaluates patients with fatigue.
Test Parameters: 1. Prealbumin Level
Pretest Condition: No fasting required. Collect serum or plasma. Report history of fatigue, weight loss, or liver symptoms.
Specimen: Serum (SST, 2-5 mL), Plasma (EDTA, 2-4 mL). Transport in a biohazard container.
Sample Stability at Room Temperature: 8 hours
Sample Stability at Refrigeration: 7 days
Sample Stability at Frozen: 6 months
Medical History: Document fatigue, weight loss, or history of liver disease/malnutrition. Include current medications, especially nutritional supplements.
Consent: Written consent required, detailing the tests purpose, malnutrition/liver issue implications, and risks of sample collection.
Procedural Considerations: Uses immunoassays to measure prealbumin levels. Results are available in 1-2 days, supporting clinical decisions. Performed in laboratories, often for malnutrition or liver diagnosis.
Factors Affecting Result Accuracy: Sample hemolysis or inflammation can affect results. Recent nutritional intake may alter levels.
Clinical Significance: Low prealbumin confirms malnutrition or liver dysfunction, guiding nutritional support or liver therapy. Normal results may require albumin testing.
Specialist Consultation: Consult a hepatologist or nutritionist for result interpretation and treatment planning.
Additional Supporting Tests: Albumin levels, liver function tests, or nutritional assessment to confirm malnutrition/liver diagnosis.
Test Limitations: Non-specific for certain conditions; clinical correlation is needed. Sample quality affects sensitivity.
References: ASPEN Malnutrition Guidelines, 2023; Clinical Nutrition, Shenkin A, 2022.
