Test Code FT4 Free Thyroxine (FT4)

Important Note

Plasma samples are NOT acceptable for testing

Obtain specimen using standard phlebotomy techniques.

No special patient preparation is necessary.

Container	Specimen	Temperature	Collect Vol	Submit Vol	Min Vol	Stability
SST	Serum	Refrigerate	4.0 mL	1.0 mL	0.6 mL	7 days

Reject Due To:

- Moderate or Marked Hemolysis

- Specimen unlabeled or mislabeled

- Plasma specimen received for testing

Ortho Vitros XT 7600 / Competitive Immunoassay

Daily / Same Day / Not available STAT

Male and Female: 0.78 - 2.19 ng/dL

Meditech	Medent	LOINC	CPT
FT4S	FT4S	3024-7	84439