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T-3 Uptake
MessageFor Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.
Test Code
T3U
Alias/See Also
861;
Tups;
T3 Resin Uptake;
T3U;
T3,
T3 RESIN,
T3 UP,
T3RU,
TRIIODOTHYRONINE,
RESIN UPTAKE (T3),
THBR,
RESIN UPTAKE
Tups;
T3 Resin Uptake;
T3U;
T3,
T3 RESIN,
T3 UP,
T3RU,
TRIIODOTHYRONINE,
RESIN UPTAKE (T3),
THBR,
RESIN UPTAKE
CPT Codes
84479
Preferred Specimen
serum
Minimum Volume
1 mL
Other Acceptable Specimens
plasma from Lithium Heparin (Light Green Top) tube
Instructions
Barrier tubes (serum separator tubes or plasma separator tubes) are preferred. If non-barrier tubes are utilized, the serum/plasma must be removed immediately after centrifuging and placed in a screw-cap transfer tube.
Collection notes: Avoid hemolysis. Invert tubes at least 8 times. Allow to clot in an upright position for 30 minutes. Within 2 hours, centrifuge tubes 10 minutes. Keep tightly stoppered.
Do NOT re-centrifuge tubes. Do NOT freeze the primary collection tube.
Collection notes: Avoid hemolysis. Invert tubes at least 8 times. Allow to clot in an upright position for 30 minutes. Within 2 hours, centrifuge tubes 10 minutes. Keep tightly stoppered.
Do NOT re-centrifuge tubes. Do NOT freeze the primary collection tube.
Transport Container
Original tube preferred, may be sent in a screw-top transfer tube.
Transport Temperature
Room Temperature or Refrigerated
Specimen Stability
Room Temperature = 4 days
Refrigerated = 4 days
Frozen = 3 months
Refrigerated = 4 days
Frozen = 3 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.
Methodology
immunoassay
Setup Schedule
24/7
AU
AU
Report Available
daily
Clinical Significance
Decreased: Pregnancy, estrogens, hyperproteinemia, acute intermittent porphyria.Increased: Androgens, hyperproteinemia, stress, acute liver disease.
Performing Laboratory
CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine, OH 45439
Last Updated: November 23, 2021