Prior to the availability of sensitive TSH assays, thyrotropin releasing hormone or<unk> s were relied upon for confirming and assessing the degree of suppression in suspected hyperthyroidism. Typically, this<unk>  test involves determining basal TSH levels and levels 15 to 30 minutes after an intravenous bolus of<unk> . Normally, TSH would rise into the concentration range measurable with less sensitive TSH assays. Third generation TSH assays do not have this limitation and thus<unk><unk>  is generally not required when third generation TSH assays are used to assess degree of suppression.
TRH stimulation test
Fluid deprivation test
ISET Test
Caloric reflex test
Combined rapid anterior pituitary evaluation panel
Radioactive iodine uptake test
Syndromic testing
Czermak–Hering test