High Sensitivity Thyroid Stimulating Hormone, serum
Test Code
hTSH
Description
For differential diagnosis of primary, secondary, and tertiary hypothyroidism. Also 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.
Collect
Plain red top or SST tube.
Pediatric Collection
Minimum volume: 0.3mL serum
Unacceptable Conditions
Grossly hemolyzed specimens, more than one freeze/thaw cycle
Storage Transport Temp
Offsite: Send frozen serum Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability
Stability after cell separation:
24 hours at RT (15-25°C)
7 days hours refrigerated 2-8°C
6 months frozen at ≤ -10°C
Performed
Mon-Fri
Methodology
Chemiluminescent Magnetic Immunoassay (CLIA)
Turnaround Time
4 hour routine, 1 hour STAT
Department
Core Lab
Synonyms
TSH
Study Offerings
Not offered
Related Tests
Quantiferon TB Test (QTB)
Reference Interval
All: 0.34 - 5.60 mcIU/mL
CPT Code
84443
New York Approved
FDA Approved or Cleared
FDA
Approved or Cleared