Evaluation of LOCI® technology-based thyroid blood tests on the Dimension Vista® analyzer

► Evaluation of thyroid blood tests by LOCI® technology on Vista® analyzer is proposed. ► LOCI® fulfills the third-generation criteria for TSH. ► Heparin-treated plasma samples give slightly higher values than serum. ► Precision of LOCI® compared to radioimmunoassay is poor for FT4 and FT3. ► Serum albumin and prealbumin are related to free thyroid hormone levels by LOCI®.