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Endocrinology T3 and T4I specimen update

Wednesday, January 17, 2024

Serum and heparinized plasma are now the only acceptable sample types for T3 (Triiodothyronine) baseline and T4 (Thyroxine) IMMULITE testing. This applies to test codes: T3, T4I and THYPALLI. Whereas we had been running these tests on EDTA plasma with a disclaimer, the disclaimer is no longer applicable, and we will need to cancel these tests if requested on this specimen type.