5-6 Obstetrics
Types Tools Descriptions Methods or formulae
Sac Diam1 Gestational Sac Diameter 1
Sac Diam2 Gestational Sac Diameter 2
Sac Diam3 Gestational Sac Diameter 3
AF1 Amniotic Fluid 1
AF2 Amniotic Fluid 2
AF3 Amniotic Fluid 3
AF4 Amniotic Fluid 4
LVIDd
Left Ventricular Internal
Diameter at End-diastole
LVIDs
Left Ventricular Internal
Diameter at End-systole
LV Diam Left Ventricular Diameter
LA Diam Left Atrium Diameter
RVIDd
Right Ventricular Internal
Diameter at End-diastole
Measurement
RVIDs
Right Ventricular Internal
Diameter at End-systole
RV Diam Right Ventricular Diameter
RA Diam Right Atrium Diameter
IVSd
Interventricular Septal
Thickness at End-diastole
Distance in 2D General
Measurements
IVSs
Interventricular Septal
Thickness at End-systole
IVS
Interventricular Septal
Thickness
LV Area Left Ventricular Area
LA Area Left Atrium Area
RV Area Right Ventricular Area
RA Area Right Atrium Area
Ao Diam Aorta Diameter
MPA Diam
Main Pulmonary Artery
Diameter
LVOT Diam
Left Ventricular Outflow Tract
Diameter
RVOT Diam
Right Ventricular Outflow Tract
Diameter
Facial Angle
Angle of the two lines: one
from fetus nasal base to
forehead, and the other one
from nasal base to ear base.
Angle in 2D General
Measurements