FBOA
foreign body obstructed airway
FBS
fasting blood sugar
FBW
fasting blood work
FF (F. Fl)
force fluids
FH
family history
FHS
fetal heart sounds
FHT
fetal heart tone
FIFO
first in, first out
FSH
follicle-stimulating hormone
ft
foot
FUO
fever of undetermined origin
Fx
fracture