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Related Experiment Video

Updated: Sep 15, 2025

Electrochemiluminescence Assays for Human Islet Autoantibodies
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Performance validation of Abbott Alinity i chemiluminescence analyzer for five thyroid function tests.

Hongyu Zhang1, Baixiu Wu2, Liuhua Ke1

  • 1Department of Clinical Laboratory, The Third Affiliated Hospital of Guangxi University of Chinese Medicine, Liuzhou Traditional Chinese Medical Hospital, The Third Clinical Faculty of Guangxi University of Chinese Medicine, Liuzhou, Guangxi, China.

Practical Laboratory Medicine
|July 18, 2025
PubMed
Summary
This summary is machine-generated.

The Abbott Alinity i analyzer shows reliable performance for five thyroid function tests, including free T3, free T4, T3, T4, and TSH. This evaluation confirms its accuracy and precision for clinical use.

Keywords:
AlinityFT3FT4Performance validationTSHTT3TT4

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Area of Science:

  • Clinical Chemistry
  • Laboratory Medicine
  • Immunoassay Technology

Background:

  • Thyroid function tests are crucial for diagnosing and monitoring thyroid disorders.
  • Accurate and reliable analytical methods are essential for effective patient management.
  • The Abbott Alinity i is a modern chemiluminescence immunoassay system.

Purpose of the Study:

  • To comprehensively evaluate the analytical performance of the Abbott Alinity i analyzer.
  • To verify its suitability for measuring five key thyroid hormones: FT3, FT4, T3, T4, and TSH.
  • To ensure the analyzer meets established performance criteria for clinical laboratory use.

Main Methods:

  • Verification of precision (repeatability and intermediate precision) according to CLSI guidelines.
  • Assessment of accuracy by comparing measured values to target values.
  • Evaluation of linearity for T3, T4, and TSH assays.
  • Determination of reference intervals using healthy individuals.
  • Analysis of sample carryover effect.

Main Results:

  • Precision metrics met quality targets, with repeatability ≤6.11% and intermediate precision ≤7.33%.
  • Accuracy demonstrated good agreement, with deviations <12.5% from target values.
  • Linearity was confirmed for T3, T4, and TSH within allowable deviation limits.
  • Reference intervals aligned with manufacturer specifications, and carryover effect was <1%.

Conclusions:

  • The Abbott Alinity i analyzer exhibits acceptable performance for the five thyroid function tests.
  • The system meets manufacturer specifications for precision, accuracy, linearity, reference intervals, and carryover.
  • This validates the Alinity i analyzer as a reliable tool for thyroid function testing in clinical laboratories.