Test Code TSH3GR TSH with Free T4 Reflex

Important Note

When TSH is <0.270 or >4.200 uIU/mL the reflex testing Free T4 will be performed.

Testing for 18+ years old only.

Epic ID

LAB5113

Preferred Collection Container: green top lithium heparin tube, SST

Also Acceptable Collection Container: serum red top tube or EDTA purple top tube

Collection Information:

Collect 1 mL of Lithium heparinized plasma or serum.

Serum or plasma must be separated from cells within 2 hours of collection.

Temperature	Stability	Preferred Transport
Refrigerated	7 days	X

Allen Hospital Laboratory

Daily

2 hours

0.270-4.200 uIU/mL

84443