GE Logiq 500, Advanced Reference Manual

Page: 159 / 474

Advanced Vascular
LOGIQ 500 Advanced Reference Manual
2276614–100 Rev. 0
4–113

Vascular Calculation Formulas (cont’d)
Calc
Mnemonic Calc Name
Input
Measurements Formula
Rt ICA/CCAd
Rt ICA/CCAs
Right Internal Carotid Artery
Velocity/Common Carotid Artery
Velocity Ratio two Doppler blood flow
peak velocities RT XICA/XCCA=
Vx
ICA
/Vx
CCA
Rt VERT Right Vertebra Artery
Velocity, systole one Doppler blood flow
peak velocity RT VERT=v1
[cm/s or m/s]
Rt SUBC Right Subclavian Artery
Velocity, systole one Doppler blood flow
peak velocity RT SUBC=v1
[cm/s or m/s]
Rt PI Right Pulsatility Index two Doppler blood flow
peak velocities and TAMAX Rt PI=(V
max
–V
diastole
)/
TAMAX *NOTE*
Rt RI Right Resistivity Index two Doppler blood flow
peak velocities Rt RI=(V
max
–V
diastole
)/
V
max
*NOTE*
Rt S/D Ratio Right Systolic Velocity/Diasto-
lic Velocities Ratio two Doppler blood flow
peak velocities Rt S/D=V
systole
/V
diastole
*NOTE*
Rt A/B Ratio Right side Velocities Ratio two Doppler blood flow
peak velocities Rt A/B=V
1
/V
2
Same as above,
but for Left Carotid
Artery Same as above, but for Left Ca-
rotid Artery Same as above Same as above
*NOTE*: V
diastole
= V
min
or V
end–diastole
(depends on preset selection)
Table 4–29. Advanced Vascular Calculation Formulas (cont’d)