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Operation Manual
Early OB 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 automatically recorded in a report.
[Figure 5.3 Early OB Measurement Menu]
Measurement Menu Item Mode Method Unit
GS - All Distance cm, mm
YS - All Distance cm, mm
CRL - All Distance cm, mm
NT - All Distance mm
NB - All Distance cm, mm
BPD - All Distance cm, mm
FL - All Distance cm, mm
AC - All
Circumference or automatic
calculation
cm, mm
EFW - All
Duct Venosus
Duct V All PW Velocity cm/s, m/s
Duct V S Vmax PW Velocity cm/s, m/s
Duct V D Vmax PW Velocity cm/s, m/s
Duct V A Vmax PW Velocity cm/s, m/s
Fetal HR - M, PW Heart Rate bpm
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