The minimum level of TSH that can he detected by TSH assay of the third generation thyroid function tests is which of the following?
0.4 lU/ml
0.04 IU/ml
0.004 lU/ml
4 IU/ml
Functional sensitivities for three generations of TSH assays: First generation: Functional sensitivity is 1-2 IU/mL Second generation: Functional sensitivity is 0.1-0.2 IU/mL Third generation: Functional sensitivity is 0.01-0.02 IU/mL Among the options more appropriate is 0.04 IU/mL Ref: Aicle: Evolution of TSH Assays: A Third Generation Viewpoint