GE LOGIQ A100, Technical Publication

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OB Measurements
152
LOGIQ
t α
100 User Manual
2211157–100 Rev 0
Estimated Fetal Weight (EFW) - European
The Estimated Fetal Weight is arrived at by four possible
methods: BPD/AC (Shepard/Warsoff), BPD/AC
(Shepard:Richards/Berkowitz), FL/AC/HC (Hadlock,
Radiology 150:535:1984) and BPD/TAD (German). The
selected EFW is displayed on the left side of the screen.
(The selection can be made in the European OB Table
Setup by pressing
CONTROL S2). Calculations are
made based on the last measurement done.
Select [8] in the Main Menu for Estimated Fetal Weight.
The calculations appear on the Calculation Result Area
on the display.
If any of the above Measurements are not available, the
Calculation Result Area will display EFW N.M.
Estimated Fetal Weight (BPD/AC) (Shepard/Warsoff Model)
Estimated Fetal Weight is determined according to the
equation:
EFW[g]=10^(1.7288+0.09184*BPD[cm]+(0.02581*AC[cm])
+(0.00011*BPD[cm] *AC[cm]).
The above formula yields Estimated Fetal Weight in
grams.
When EFW is selected, this calculation is made only if
BPD/AC measurements are already available. If not
available, the EFW to the left of the screen will display
EFW N.M.
8
.