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HelpTest Code FFT4F T4, Free, Direct Dialysis
Additional Codes
Torrance Memorial Laboratories Test Code: 421310741
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.
Method Name
Equilibrium Dialysis, Chromatography/Mass Spectrometry
Reporting Name
T4, Free, Direct DialysisSpecimen Type
SerumSpecimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| 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 daysPerforming Laboratory
Quest Diagnostics Nichols InstituteTest Classification
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. The assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.CPT Code Information
84439
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FFT4F | T4, Free, Direct Dialysis | 6892-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| Z1571 | T4, Free, Direct Dialysis | 6892-4 |