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Chapter 5 Measurements and Calculations
Measurement Menu Item Mode Method Unit
Fetal M-mode
Fetal M-mode (All) M Continuous measurement cm, mm
IVSd M Distance cm, mm
LVIDd M Distance cm, mm
LVPWd M Distance cm, mm
IVSs M Distance cm, mm
LVIDs M Distance cm, mm
LVPWs M Distance cm, mm
RVDd M Distance cm, mm
Fetal HR - M, PW Heart Rate bpm
CTAR (Cardio-Thorax Area Ratio)
This measurement is for comparing the sizes of the fetus chest and heart. The comparison is made
by obtaining the ThD ap, ThD trans, HrtD ap, and HrtD trans values.
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