OB Measurements and Calculations
LOGIQ 7 Basic User Manual 9-19
Direction 2392206-100 Rev. 1
Amniotic Fluid Index (AFI)
To calculate the amniotic fluid index, you make measurements
of the four quadrants of the uterine cavity. The system adds
these four measurements together to calculate the Amniotic
Fluid Index.
NOTE: The four quadrants can be measured with distance (caliper) or
circumference (circle) measurements. Press the appropraite AFI
quadrant Touch Panel key to toggle between caliper and circle.
1. Select AFI.
The first distance measurement, AFI-Q1, is already
selected.
2. Make a standard distance measurement for the first
quadrant:
a. To position the active caliper at the start point, move the
Trackball.
b. To fix the start point, press Set.
The system fixes the first caliper and displays a second
active caliper.
c. To position the second active caliper at the end point,
move the Trackball.
A dotted line connects the measurement points.
d. To complete the measurement, press Set.
The system displays the distance value in the Results
Window.
3. When the measurement of the first quadrant is completed,
unfreeze and move to the second quadrant.
4. After you obtain the image, press Freeze and then
Measure.
The system prompts you to continue with the AFI
measurements.
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