GE LOGIQ A100, Technical Publication

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OB Measurements
151
LOGIQ
t α
100 User Manual
2211157–100 Rev 0
Estimated Fetal Body Weight (EFBW) - Tokyo University
The Estimated Fetal Body Weight is computed using the
distance measurements of BPD, APTD (Anteroposterior
Trunk Diameter), TTD (Transverse Trunk Diameter) and
FL. These measurements have to be completed first to
arrive at the computation. Calculations are done based
on the last measurement.
Select [8] in Main Menu for Estimated Fetal Body
Weight. The calculations are displayed for BPD, APTD,
TTD and FL in the Calculation Result Area of the display.
Estimated Fetal Body weight is computed using a Todai
model (Tokyo University).
The formula yields EFBW in grams where the BPD,
APTD (Anteroposterior Trunk Diameter), TTD
(Transverse Trunk Diameter) and FL are in cm. Four
measurements are required.
EFBW=1.07*BPD
3
+3.42*APTD*TTD*FL
If any of the above Measurements are not available, the
Calculation Result Area will display EFW N.M.
Estimated Fetal Body Weight (EFBW) - Osaka University
The Estimated Fetal Body Weight is computed using two
distance calculations (BPD & FL) and one area
calculation (FTA). These measurements have to be
completed first to arrive at the computation. Calculations
are made based on the last measurement made.
Select [7] in the Main Menu for Estimated Fetal Body
Weight. The calculation appears for BPD, FL and FTA in
the Calculation Result Area.
EFBW=1.25647*BPD
3
+3.50655*FTA*FL+6.3
If no Measurements are available, the Calculation Result
Area will display EFBW N.M
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