EDAN DUS 60 - Page 60

DUS 60 Digital Ultrasonic Diagnostic Imaging System User Manual Cardiology Measurements and Calculations
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1. Items of Measurement and Calculation
B-CARDIAC MEAS: RV, LV, and PA.
2. Items of input
Heart Rate, LVET, and Height & Weight
The default measurements are LVLs, LVALs, LVLd, and LVALd measurements, in the method
of single-plane ellipse (S-P Ellipse) measurement.
The formulas of B mode cardiac LV measurement include Single plane ellipse (S-P Ellipse),
Dual plane ellipse (B-P Ellipse), Bullet, and Modified Simpson (Mod. Simpson), shown as
follows:
1. Single plane ellipse formula:
NOTE: d: end diastolic; s: end systolic
Label Description Method
LVLd Left Ventricle Long-axle Diameter Distance (mm)
LVALd Left Ventricle Area of Long-axle
Ellipse Area (mm
2
, cm
2
, or dm
2
)
LVLs Left Ventricle Long-axle Diameter Distance (mm)
LVALs Left Ventricle Area of Long-axle
Ellipse Area (mm
2
, cm
2
, or dm
2
)
HR Heart Rate Key in (bpm)
EDV End Diastolic Volume
EDV (mL)= (8/3/π)×{LVALd (mm
2
)}
2
/LVLd
(mm) /1000
ESV End Systolic Volume
ESV (mL)= (8/3/π)×{LVALs (mm
2
)}
2
/LVLs
(mm) /1000
SV Stroke volume SV (mL)=EDV (mL)-ESV (mL)
CO Cardiac Output CO (L/min)= SV (mL) × HR (bpm)/1000
EF Ejection fraction (B mode) EF (No unit)= SV (mL)/ EDV (mL) x 100%
SI Stroke Index SI (No unit)= SV (mL)/ BSA (m
2
)
CI Cardiac Index CI (No unit)= CO (L/min)/ BSA (m
2
)
BSA Body Surface Area Calculate by the selected formula (m
2
)
Table 8-6 Measurement and Calculation Items with Single Plane Ellipse Formula
DUS 60 Digital Ultrasonic Diagnostic Imaging System User Manual Cardiology Measurements and Calculations
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2. Dual plane ellipse formula:
NOTE: d: end diastolic; s: end systolic
Label Description Method
LVALd Left Ventricle Area of Long-axle
LVAMd
Left Ventricular Fractional Area of
Mitral Valve
Ellipse Area (mm
2
, cm
2
, or dm
2
)
LVIDd Left Ventricle Internal Diameter Distance (mm)
LVALs Left Ventricle Area of Long-axle
LVAMs
Left Ventricular Fractional Area of
Mitral Valve
Ellipse Area (mm
2
, cm
2
, or dm
2
)
LVIDs Left Ventricle Internal Diameter Distance (mm)
HR Heart Rate Key in (bpm)
EDV End Diastolic Volume
EDV (mL)= (8/3/π)×{LVALd (mm
2
)}
2
/LVLd
(mm) /1000
ESV End Systolic Volume
ESV (mL)= (8/3/π)×{LVALs (mm
2
)}
2
/LVLs
(mm) /1000
SV Stroke volume SV (mL)=EDV (mL)-ESV (mL)
CO Cardiac Output CO (L/min)= SV (mL) × HR (bpm)/1000
EF Ejection fraction (B mode) EF (No unit)= SV (mL)/ EDV (mL) x 100%
SI Stroke Index SI (No unit)= SV (mL)/ BSA (m
2
)
CI Cardiac Index CI (No unit)= CO (L/min)/ BSA (m
2
)
BSA Body Surface Area Calculate by the selected formula (m
2
)
Table 8-7 Measurement and Calculation Items with Dual Plane Ellipse Formula
3. Bullet volume formula:
NOTE: d: end diastolic; s: end systolic
Label Description Method
LVAMd
Left Ventricular Fractional Area of
Mitral Valve
Ellipse Area (mm
2
, cm
2
, or dm
2
)
LVLd Left Ventricular Length Distance (mm)
LVAMs
Left Ventricular Fractional Area of
Mitral Valve
Ellipse Area (mm
2
, cm
2
, or dm
2
)