Lab Test Details
|
SIM |
50280 |
|
CPT |
84436; 84479 |
|
Synonyms |
FTI (Free Thyroxine Index); THY |
|
Specimen Type |
Serum |
|
Container |
4.0 ml Gold-top serum separator |
|
Collection Instructions |
None |
|
Volume |
2 ml serum, minimum 0.5 ml |
|
Additional Information |
none |
|
Patient Preparation |
none |
|
Specimen Processing Instructions |
Serum: Allow to clot. Centrifuge at 3380 rpm’s (±100) for a minimum of 10 minutes Centrifuge within 2 hours of collection. |
|
Transport Requirements |
Refrigerated |
|
Specimen Stability |
Room temperature: 8 hours Refrigerated: 5 days |
|
Rejection Criteria |
If not centrifuged within 2 hours of collection. |
|
Reference Range |
T4 = 4.5 – 12.0 ug/dl Tuptake = 27 - 36% FTI = 1.00 – 4.80 |
|
Critical Value |
none |
|
Test Includes |
T4 (Total); T uptake; Calculated Free Thyroxine Index |
|
Methodology |
Homogenous Enzymatic Immunoassay |
|
Testing Frequency |
Daily, Monday - Sunday |
|
|
|
|
Reviewed By |
Sandy Hammett |
|
Reviewed Date |
1/31/2018 |
|
Supplemental |
|