Full Digital Color Doppler Ultrasonic Diagnostic Instruments (Vet) User’s Manual V1.01
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Mod.Simpson
This measurement method calculates the LV volume by using the LV long axis view, the LV short
axis at the level of the mitral value and the LV short axis view at level of the papillary muscles.
Steps:
1.
Press the
Measure
key in the real time or frozen B/Color/PDI mode, and the measurement menu
displays on the top left of the screen.
2.
Select [LV] on the menu by moving the trackball and press
Set
to confirm.
3.
Select [Mod.Simpson] on the pop-up menu and a marker displays on the image.
4.
Perform the LVLd
LVLs
LVAMd
LVAMs
LVAPd
LVAPs measurements one by
one and the measurement results displays in the result box.
Measurement
Item
Measurement
Sub-item
Description
Measurement Method
Left Ventricle/
Mod. Simpson
Method
LVLd
LV long axis length at end diastole
Refer to Section 10.5.1.1
Distance.
LVLs
LV long axis length at end systole
LVAMd
LV short axis area at mitral value at
end diastole
Refer to Section 10.5.1.2
Area and Circumference
LVAMs
LV short axis area at mitral value at
end systole
LVAPd
Area of LV short axis view at the level
of papillary muscles at end diastole
LVAPs
Area of LV short axis view at the level
of papillary muscles at end systole
The system automatically calculates the following items according to the measurement results.
Calculation
Item
Description
Formula
EDV
End- diastolic Left
Ventricular Volume
EDV(ml)=LVLd(
)/9×
ESV
End- systolic Left
Ventricular Volume
ESV(ml)=LVLs (
)/9×
SV
Stroke Volume
SV = EDV(ml) - ESV(ml)
EF
Ejection Fraction
EF=100%×SV(ml)/EDV(ml)
SI
Stroke Volume
Index
SI=SV(ml)/BSA(
)
CO
Cardiac Output
CO(l/min)=SV(ml)× HR(bpm)/1000
CI
Cardiac Index
CI=CO(l/min)/BSA(
)
10.6.3.3 Left Ventricle Mass Weight
LV mass weight can be calculated by measuring LVPWd, LVSTd and LVIDd.
Steps:
1.
Press the
Measure
key in the real time or frozen B/Color/PDI mode, and the measurement menu
displays on the top left of the screen.
2.
Select [LVMW] on the menu by moving the trackball and press
Set
to confirm. A marker displays on