"thyroxine (T4) is used along with T3 to assess thyroid function. Produced by the thyroid gland, its regulation is controlled by a complex feedback mechanism. Decreasing levels of T4 causes increased production of TSH and TRH by the hypothalamus and pituitary respectively. Therefore, there is an inverse relationship between the Total T4 level and TSH in a patient with an intact thyroid and a normally functioning pituitary axis "
Código de la prueba:
Tiempo de entrega de los resultados:
1 mL SST Tube
Red Top,Microtainer - Pediatric SST,Aliquot Tube-Serum,Microtainer - Pediatric Red,Aliquot Serum- Red Top
Fill tube, invert gently 5 times, label with patient name, let stand for minimum of 30 minutes, maximum of 1 hr, spin for 10-15 minutes