The Finecare T3 Rapid Quantitative Test (Reagent) Kit, when used with a Finecare immunofluorescence analyzer, quantitatively measures Total Triiodothyronine (T3) levels in human blood (serum or plasma). It provides quantitative results — meaning it gives a precise numerical concentration of T3, which aids in the comprehensive assessment of thyroid function, particularly in the diagnosis and management of hyperthyroidism and thyroid hormone replacement monitoring when used alongside other thyroid panel tests.