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Test Code FFT4F T4, Free, Direct Dialysis


Specimen Required


Patient Preparation: Fasting is preferred (8-16 hours)

Supplies: Sarstedt Aliquot Tube 5 mL (T914)

Collection Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collections Instructions:

1. Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable.

2. Centrifuge and aliquot 1 mL of serum into a plastic vial.

3. Send refrigerate.


Children's Mercy Hospital Note:

CMH Collection: 2 mL blood in Red gel vacutainer

Method Name

Equilibrium Dialysis, Chromatography/Mass Spectrometry

Reporting Name

T4, Free, Direct Dialysis

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 14 days
  Frozen  35 days
  Ambient  4 days

Reject Due To

Lipemia Mild Reject; Gross Reject
Heparin plasma EDTA plasma Reject

Reference Values

Age

Reference Range

Unit of Measure

(Adult)

Adult

(Males and Females)

0.9-2.2

ng/dL

(Pediatric)

Prematures, 25-30 weeks

Birth-7 days

0.5-3.3

ng/dL

Prematures, 31-36 weeks

Birth-7 days

1.3-4.7

ng/dL

Cord Blood, >37 weeks

1.2-2.2

ng/dL

Birth-4 days

2.2-5.3

ng/dL

2 months to 2 years

1.2-2.5

ng/dL

3 to 17 years

1.0-2.4

ng/dL

(Pregnancy)

First Trimester

0.9-2.0

ng/dL

Second Trimester

0.8-1.5

ng/dL

Third Trimester

0.8-1.7

ng/dL

Day(s) Performed

Monday through Saturday

Report Available

4 to 8 days

Performing Laboratory

Quest Diagnostics Nichols Institute

CPT Code Information

84439