GE LOGIQ A100, Technical Publication

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OB Measurements
139
LOGIQ
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100 User Manual
2211157–100 Rev 0
Amniotic Fluid Index (AFI)
The Amniotic Fluid Index is determined by taking
distance measurements of the amniotic fluid in each of
the four quadrants of the uterine cavity. These four
measurements are added together to calculate the
Amniotic Fluid Index. As many as four Amniotic Fluid
Index calculations can be displayed at a time.
Select [8] in the Main Menu of the U.S. version.
Use the TRACKBALL to position the open ended ‘ ’
cursor at the start point of measurement.
Press SET to fix the start point. A second open ended ‘ ’
cursor appears.
Use the TRACKBALL to move the cursor to the end point
of measurement.
Press SET to fix the end point. Another open ended ‘ ’
cursor appears to start the next measurement. Follow the
same procedure for 4 Distance Measurements in the
proper scan planes to arrive at the Amniotic Fluid Index
calculation which is displayed in the Calculation Result
Area of the display in cm as AFI1, AFI2, AFI3 and AFI4.
If any distance measurements are available before
invoking the Amniotic Fluid Index, only the remaining
distance measurement needs to be made to arrive at AFI.
Unfreezing the image after doing one AFI measurement,
does not erase the results in the Calculation Result Area,
and you can carry on the remaining calculations to arrive
at the AFI value by following the same procedure above.
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