Test Code T4 T4 (Thyroxine), Total
Additional Codes
Hospital Ordering Code |
---|
LAB126 Thyroxine, Total (T4) |
Specimen Requirements
Container/Tube Type:
Green (Lithium Heparin)
Lime Green (Heparin Plasma Separator Tube)
Red (No Additive)
SST (Serum Separator)
Preferred Collection Container:
Green (Lithium Heparin)
Light Green (Heparin Plasma Separator Tube)
Also Acceptable Collection Container:
Plasma from Lavender tubes is acceptable but will not route in the Laboratory Information System (Sunquest).
Transport Information:
1.5 mL blood/0.5 mL serum
Minimum Sample Volume:
0.8 mL blood/0.13 mL serum
Performing Laboratory
Pathology Laboratory, UnityPoint Health, Des Moines
CPT
84436
Methodology
Electrochemiluminescence
Specimen Transport Temperature
Refrigerated Stability:
7 days
Frozen Stability:
1 month
Ambient Stability:
2 hours
Day(s) Test Set Up
Performed:
Daily
Analytical Time:
1 day