A
5200 Harry Hines Blvd.
,
Dallas
,
TX
75235
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General Information
Alias: TSH
Performed: 24 hrs.
Turn Around Time: Med Emerg: 60 minutes; Routine: 4 hrs.
CPT Codes: 84443
Performed By: Chemistry
Clinical Utility: Free T4 estimate will be performed if TSH value is <0.4 or >4.5 mcIU/mL. Total T3 and TU will be performed if FT4e is 0.8-1.8 ng/dL. Please note: TSH values may vary due to physiological effects of pregnancy. The variation is most notable during the first half of gestation and thus values outside the reported reference range may not reflect abnormal thyroid functions.
Unacceptable Conditions: Hemolysis
Components
| Name |
Method |
Sex |
Age Range |
Ref. Range Low |
Ref. Range High |
Units |
| TSH Reflex |
|
All |
0 minutes - 3 days |
1 |
20 |
mcIU/mL |
| TSH Reflex |
|
All |
3 days - 1 month |
0.5 |
6.5 |
mcIU/mL |
| TSH Reflex |
|
All |
1 month - Unspecified |
0.4 |
4.5 |
mcIU/mL |
| TSH Reflex Interp |
|
|
|
|
|
|
Specimen Requirements
| Type |
Container |
Volume |
Units |
Collection / Delivery |
Storage / Transport |
Off Campus |
| Blood |
Red w/Gel, 5mL |
|
|
|
Deliver at room temperature to lab within 2 hours. |
Specimens should be spun and aliquots prepared when needed. Store in appropriate temperature conditions and deliver to Logistics Laboratory. |