Obstetrics 5-9
Doppler Obstetric Measurements
Types Tools Descriptions Methods or formulae
Measurement
Umb A Umbilical Artery
D trace in General D
measurements
Duct Veno Ductus Veno
Placenta A Placenta Artery
MCA Middle Cerebral Artery
Fetal Ao Fetal Aorta
Desc Aorta Descending Aorta
Ut A Uterine Artery
Ovarian A Ovarian Artery
FHR Fetal Heart Rate HR in General D measurements
Asc Aorta Ascending Aorta
D trace in General D
measurements
RVOT Right Ventricle Outflow Tract
LVOT Left Ventricle Outflow Tract
Calculation / /
Study / /
5.5 Obstetric Measurement Operations
Operations of measurement, calculation and study are described by examples.
Tips: 1. See the table in "5.4 Obstetric Measurement Tools" above for measurement tools
and methods.
2. For the definitions of measurement, calculation and study, refer to "1.3
Measurement, Calculation and Study".
3. The order of the measurement items is presettable, see "2.4.2 Application
Measurement Preset" for details.
4. A measurement tool can be activated by clicking the item either in the
measurement menu or touch screen menu, it is described as "Select/Click ...
(certain item) in the measurement menu" in the following procedures.
5.5.1 Measurement Tool Operations
Take the HC measurement as an example.
1. Select the [HC] item/tool in the measurement menu.
See “Select Measurement Method Online” for details on how to select method online.
2. Measure area according to the Area method in 2D General Measurements.
Measurement results, GA calculation and OB growth percentile display in the result window.
You can preset whether to display EDD or not in [System Preset] -> [OB] -> [Fetal Gestational
Age].
For more details about GA, see “5.3 GA”.
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