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Operation Manual
AFI (Amniotic Fluid Index)
Measure the amniotic fluid 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 specific 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 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.
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BPD and AC
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BPD, FL and FTA
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BPD, APTD, TTD and FL
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BPD, APTD, TTD and SL
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BPD and TTD
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AC and FL
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BPD, AC and FL
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HC, AC and FL
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BPD,HC, AC and FL
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AC
NOTE:
For reference, the Osaka University /Tokyo University methods are mainly used in Asia, the Merz
method in Europe, and the Shepard/ Hadlock methods on the American continent.
Continuous Measurement / Review for EFW Calculation
You can measure OB item(s) continuously for EFW calculation.
Tips!
Before Measurement
1. Check whether the User key has been set to measure the EFW consecutively. To measure the EFW
consecutively using the User key, set it in Utility > Setup > Peripherals > User Key.
2. When the Confirm Current EFW Reference is not selected or when you want to change it, select or
change it in Utility > Measure Setup > OB > Tables > Fetal weight > EFW Equation.
NOTE:
This function is not available in 3D Mode.
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