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T4, Total (by CMIA) 甲狀腺素

R054

Specimen Required

3 mL Pl (1 mL serum)

Schedule

Monday-Saturday

Specimen Stability

Ambient:

24 hr

Refrigerated:

8 days

Frozen:

1 month

Reference Interval: Conv. Units

Euthyroid, non-pregnant (95 %ile)	4.8 - 11.7 ug/dL
Pregnancy (95 %ile):
First trimester	5.5 - 13.3 ug/dL
Second trimester	7.3 - 14.2 ug/dL
Third trimester	7.3 - 15.1 ug/dL

Reference Interval: S.I. Units

Euthyroid, non-pregnant (95 %ile)	61.8 - 150.6 nmol/L
Pregnancy (95 %ile):
First trimester	71.3 - 171.3 nmol/L
Second trimester	94.3 - 183.3 nmol/L
Third trimester	93.9 - 194.0 nmol/L

Reference Notes and Guidelines

1. T Uptake and FT4I tests are recommended to compensate for the increased or decreased thyroid hormone binding proteins that affect the T4 result ( e.g. pregnancy, drugs).

2. Flagging is based on euthyroid ranges only.

Source:

Pregnancy reference ranges are from Stricker et al, AACC, July 2006.

8/27/2025 9:57:52 PM