GE Voluson S6 Basic User Manual page 427

11.2.4.18 To obtain Z-Scores
Note
11.2.4.19 Echocardiac views
Voluson® S6/S8 Basic User Manual
5433669-100 Revision 4
FL...femur length; GA...gestational age in completed weeks; BPD...biparietal diameter;
m...multiplier; c...intercept
The Z-scores compare either GA, BPD or FL with any fetal echo parameter (i.e.: Aortic valve,
RV area, LV area). So in order to obtain Z-scores on your report, you either need to measure
BPD or FL, or have the GA calculated from your LMP; and measure any parameter from fetal
echo. To obtain Z-scores use measurements from the subcategory Z-scores.
As LV area and RV area are the biggest parameters, they are the parameters of your choice to
keep measurement inaccuracies at minimum level.
The Z-scores will be displayed on the worksheet. See, 'Obstetric - Worksheet'
Figure 1 Fetal echocardic views from which the cardiac structures can be measured. (a) Long
Axis view of the left ventricel showing the aortic valve (1) and ascending aorta (2). (b) Aortic
arch view showing the aortic valve (1), ascending aorta (2), descending aorta (3) and inferior
vena cava (4). (c) Short axis view showing the pulmonary valve (1), main (2), right (3) and left
(4) pulmonary arteries. (d) Oblique short axis view, showing the pulmonary trunk and arterial
duct (5). (e) Four chamber view, showing the tricuspid valve (1), right ventricular end-diastolic
dimension (2), right ventricular inlet length (3), right ventricular area (dashed line) (4), mitral
valve (5), left ventricular end-diastolic dimension (6), left ventricular inlet length (7) and left
ventricular area (dotted line) (8). Ao, aorta; Desc Ao, descending aorta; IVC, inferior vena
cava; LA, left atrium; LPA, left pulmonary artery; LV, left ventricle; MPA main pulmonary
artery;RA right atrium; RPA, right pulmonary artery; RV right ventricle.
Measurements and Patient Worksheets (Reports)
on page 11-53
11-51