Free thyroxine (FT4)

Free thyroxine (FT4) values and definitions

Normal referent values of free thyroxine (ft4) test for Adults, are between 0.7 and 1.8 ng/dl (or between 9 and 23 pmol/L).

Patient type:

Adults

Lower limit:
| Upper limit:
Unit:
Diagnose:
0.7   -
1.8
ng/dl
normal
9   -
23
pmol/L
normal

Normal referent values of free thyroxine (ft4) test for Children, are between 0.8 and 2.0 ng/dl (or between 10 and 26 pmol/L).

Patient type:

Children

Lower limit:
| Upper limit:
Unit:
Diagnose:
0.8   -
2.0
ng/dl
normal
10   -
26
pmol/L
normal

Normal referent values of free thyroxine (ft4) test for female gender, Pregnant, are between 0.5 and 1.0 ng/dl (or between 6.5 and 13 pmol/L).

Gender:

Female gender

Patient type:

Pregnant

Lower limit:
| Upper limit:
Unit:
Diagnose:
0.5   -
1.0
ng/dl
normal
6.5   -
13
pmol/L
normal

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