TSH, Ultrasensitive

Preferred Specimen(s) 1 mL serum

Transport Container Plastic screw-cap vial

Transport Temperature

Ambient 4 days,
Refrigerated 30 days

Methodology Chemiluminescence

Clinical Significance: For differential diagnosis of primary, secondary, and tertiary hypothyroidism. This assay is a third generation product capable of detecting values as low as 0.01 mIU/L. The test is useful in screening for hyperthyroidism. This assay allows adjustment of exogenous thyroxine dosage in hypothyroid patients and in patients on suppressive thyroxine therapy for thyroid neoplasia