Pituitary function test useful in the diagnosis of hypothalamic disorder, hypopituitarism, acromegaly, and ectopic growth hormone production by neoplasm
This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R).
It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
Immediately following collection, thoroughly mix sample by gently inverting 5 times
Gold serum separator (SST) tube
Refrigerated (preferred) - 14 days
Ambient - 7 days
Frozen - 14 days
Freeze/thaw cycles - stable x 3
Immunochemiluminometric assay (ICMA)
0.0 - 10.0 ng/mL