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Can chemiluminescent immunoanalysis of thyroid hormones stand for a reference method?
P Schneiderka1, D Bezdícková, J Uhrová
1Department of Clinical Biochemistry, Charles University, Praha, Czech Republic.
Sbornik Lekarsky
|January 1, 1994
Summary
Chemiluminescent immunoassays (ChLIA) show improved analytical sensitivity and precision for thyroid hormone (T3, T4) and TSH measurements compared to radioimmunoanalysis (RIA). Further studies are needed to confirm accuracy with primary standards.
Area of Science:
- * Clinical Chemistry
- * Immunoassay Technology
- * Endocrinology
Background:
- * Radioimmunoanalysis (RIA) has been the standard for thyroid hormone and TSH quantification.
- * Chemiluminescent immunoassays (ChLIA) offer potential advantages in sensitivity and precision.
- * Evaluating ChLIA performance against RIA is crucial for clinical adoption.
Purpose of the Study:
- * To analyze and compare the analytical properties of ChLIA for T3, T4, and TSH.
- * To assess ChLIA performance against RIA as a reference method.
- * To identify potential interferences and areas for further investigation.
Main Methods:
- * Analytical properties of ChLIA were evaluated.
- * Comparison with radioimmunoanalysis (RIA) for total triiodothyronine (T3), total thyroxine (T4), and thyrotropine (TSH).
- * Assessment of measurement range, analytical sensitivity, precision, and resistance to lipaemia.
Main Results:
- * ChLIA demonstrated superior analytical sensitivity and precision for T3, T4, and TSH compared to RIA.
- * ChLIA exhibited a wider measurement range for TSH and equivalent for T4, but lower for T3.
- * ChLIA showed better resistance to lipaemia and higher accuracy with commercial control sera.
Conclusions:
- * ChLIA presents significant analytical advantages over RIA for thyroid function tests.
- * Discrepancies with assigned values suggest the need for standardization with primary standards.
- * Further research is required to address specificity and other potential interferences.