Test Directory

Test Code
TSH
Test Name
Thyroid Stimulating Hormone
CPT Codes
84443
Expected Turnaround Time
1 day
Clinical Utility
Used in the evaluation of thyroid disorders and thyroid replacement therapy; may also aid in evaluation of pituitary disorders.
Specimen and Container Info

Specimen Types: Serum or Plasma

Collection Containers:

  • Gold Top, Serum Separator
  • Light Green Top, Plasma Separator
  • Red Top, Separator

  

Minimum Acceptable Volume:  0.8 mL

Processing and Submission Instructions

Separator tubes: Contains clot activator and gel for separating serum from cells, but not anticoagulant. Separate serum from cells as soon as the clot has formed (30 minutes). If specimen is centrifuged before clotting is complete, a fibrin clot will form on top of the cell. This may cause the gel barrier to not be intact and could cause improper separation of serum and cells, possibly affecting test results.

Transport Instructions

Transport to the laboratory refrigerated.

Stability Requirements

Room Temperature

18 hours

Refrigerated

7 days
Causes for Rejection

Grossly hemolyzed or lipemic samples are unacceptable for patient testing.

Methodology
Chemiluminescent Immunoassay
Reference Intervals
Performing Location
Hazleton Hospital, Pocono Hospital, Redeemer Health, Roble Road Core Laboratory, Schuylkill Hospital
Testing Schedule
Routine, daily