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Chapter 8 Measurements and Calculations
Measurement Menu Item Mode Method Unit
Ductus Venosus
S Vmax PW Velocity measurement cm/s
D Vmax PW Velocity measurement cm/s
A Vmax PW Velocity measurement cm/s
Auto Trace PW Doppler spectrum trace
Limited Trace PW Doppler spectrum trace
Manual Trace PW Doppler spectrum trace
PS PW Velocity measurement cm/s
ED PW Velocity measurement cm/s
MD PW Velocity measurement cm/s
PI PW Velocity measurement –
RI PW Velocity measurement –
S/D PW Continuous measurement –
AFI (Amniotic Fluid Index)
Measure the amniotic uid index. Measurements are performed by dividing the pregnant woman’s
abdomen into four parts. The distance between the fetus and the farthest point of each area is measured.
To obtain a specic image from each quadrant plane, press the Freeze button to go to the diagnosis mode.
After obtaining the image, press the Freeze button again to return to the measurement mode.
Calculating Estimated Fetal Weight (EFW)
When measurements for the following items are complete, the system uses the results to calculate
the estimated fetal weight automatically. For an equation for calculating fetal weight, please refer
to ‘Estimated Fetal Weight Formula’ in the Reference Manual Part 1.
X
BPD and AC
X
BPD, FL, and FTA
X
BPD, APTD, TTD, and FL
X
BPD, APTD, TTD, and SL
X
BPD and TTD
X
AC and FL
X
BPD, AC, and FL
X
HC, AC, and FL
X
BPD, HC, AC, and FL
X
AC
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