Interferences in immunoassays: Review and practical algorithm

Loris Wauthier, Mario Plebani, Julien Favresse

    Research output: Contribution to journalReview articlepeer-review

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    Abstract

    Immunoassays are currently the methods of choice for the measurement of a large panel of complex and heterogenous molecules owing to full automation, short turnaround time, high specificity and sensitivity. Despite remarkable performances, immunoassays are prone to several types of interferences that may lead to harmful consequences for the patient (e.g., prescription of an inadequate treatment, delayed diagnosis, unnecessary invasive investigations). A systematic search is only performed for some interferences because of its impracticality in clinical laboratories as it would notably impact budget, turnaround time, and human resources. Therefore, a case-by-case approach is generally preferred when facing an aberrant result. Hereby, we review the current knowledge on immunoassay interferences and present an algorithm for interference workup in clinical laboratories, from suspecting their presence to using the appropriate tests to identify them. We propose an approach to rationalize the attitude of laboratory specialists when faced with a potential interference and emphasize the importance of their collaboration with clinicians and manufacturers to ensure future improvements.

    Original languageEnglish
    Pages (from-to)808-820
    Number of pages13
    JournalClinical Chemistry and Laboratory Medicine
    Volume60
    Issue number6
    DOIs
    Publication statusPublished - 1 May 2022

    Keywords

    • algorithm
    • immunoassay
    • interference
    • patient care

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