
Chapter 5 Measurements and Calculations
5-25
OB Calculations
Before Obtaining OB Calculations
Set GA Equation, GA Table and OB Measurement menus. The user can manually write, back up and restore
the GA Table. For more information on GA Equation and Table, refer to the Reference Manual.
For more information about other measurement menus and setup, refer to ‘Setting Measurements’ in
‘Chapter 7. Utilities’.
NOTE: For twins, distinguish fetuses by specifying them as Fetus 1 and Fetus 2 in the Measurement
menu. Press the Change button on the control panel to change a fetus to measure.
Measurement Menu
When the measurements for the selected items are complete, the measurements and gestational age are
displayed on the screen.
The measurement method for each item is the same as for basic measurement. Measured items are auto-
matically recorded in a report.
NOTE:
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For information on basic measurements, please refer to “Basic Measurements” and “Common
Measurement Methods” in this chapter.
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For references on measurement items, please refer to “Reference Manual – Part 1.”
[Figure 5.3 OB Measurement Menu]
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