'All that glisters is not gold': Ultrafiltration and free thyroxine measurement

Autor: John E.M. Midgley
Rok vydání: 2011
Předmět:
Zdroj: Clinical Biochemistry. 44:151-153
ISSN: 0009-9120
DOI: 10.1016/j.clinbiochem.2010.11.001
Popis: Objective To examine the merits of measuring free analytes by ultrafiltration using either diluted or undiluted serum. Results Confidence in the accuracy of measurements is affected both by problems identified in current systems using semipermeable membranes, the sensitivity of the system to artefacts and comparisons with other imperfect assays. Conclusion All “gold standard” methods must robustly obey sound physicochemical principles if valid conclusions are to be drawn.
Databáze: OpenAIRE