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Operation Manual
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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.
Fetal Heart - Doppler Measurement Menu
[Figure 5.17 Fetal Heart-Doppler Measurement Menu]
Measurement Menu Item Mode Method Unit
MPA
Auto Trace PW Spectrum Trace
Limited Trace PW Spectrum Trace
Manual Trace PW Spectrum Trace
PSV PW Velocity cm/s, m/s
EDV PW Velocity cm/s, m/s
Fetal HR M, PW Heart Rate bpm
Duct Artriosus
Auto Trace PW Spectrum Trace
Limited Trace PW Spectrum Trace
Manual Trace PW Spectrum Trace
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