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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.

T Uptake (by CMIA) 甲狀腺素攝取率	R055
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