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T Uptake (by CMIA) 甲狀腺素攝取率

R055

Specimen Required

3 mL Pl (1 mL serum)

Schedule

Monday-Saturday

Notes

Reference ranges updated on Dec 10, 2012.

Specimen Stability

Ambient:

24 hr

Refrigerated:

14 days

Frozen:

1 month

Reference Interval

Normal TBC	0.69-1.41 Units
Low TBC	< 0.69 Units
High TBC	> 1.41 Units

Reference Notes and Guidelines

1. T-Uptake test is a measurement of thyroid binding capacity (TBC). Values are expressed as dimensionless units with a value of 1.0 representing a normal TBC.

2. T-Uptake should be used in conjuction with the Total T4 test to yield the FT4I. Conditions that increase T-Uptake values include pregnancy, elevated estogren and some fertility drugs. Decreased T-Uptake values include heparin, dilantin, salicylates, and malnutrition.

3. Flagging is based on euthyroid ranges only.

4/6/2026 12:19:37 AM