S/D (D/S) Ratio, Ri, A/B Ratio Or Pi - GE Logiq 500 User Manual

S/D (D/S) Ratio, RI, A/B Ratio or PI

To measure the systolic/diastolic (diastolic/systolic) ratio,
resistance index, velocity ratio and pulsatility index:
Ratio
Transf CALCS is only available with Realtime Doppler Calculation option installed
Figure 10–33. Cardiac Calculation Sub-Menu
Select S/D (D/S) RATIO, RI, A/B RATIO or PI from the
Calculations Sub-Menu. Perform peak velocity measurements
as described on 7–14 .
The first cursor is the start point on the Doppler waveform. This
would be systole for S/D ratio (diastole for D/S ratio), peak
velocity for RI, "A" velocity for A/B ratio and V
The second cursor is the end-point cursor to the end point of
.
the Doppler waveform. This would be diastole for S/D ratio
(systole for D/S ratio), minimum velocity for RI, "B" velocity for
A/B ratio and Vd for PI.
NOTE: For the PI calculation, if Trace Auto is not selected,
manually trace the waveform between V
If 2 velocity measurements are made prior to selecting S/D
.
(D/S) ratio, A/B ratio or RI, the system automatically calculates
S/D (D/S) ratio, A/B ratio or RI from the last two velocity
measurements recorded.
NOTE: For the PI calculation, if Trace Auto is on, the system
automatically traces the waveform when Set is pressed to fix
Vd.
With S/D (D/S), PI and RI, if "Vd" is selected as the diastole
Hints
velocity in Preset Program page 4, the end point is defined as
Vd if Trace Auto is OFF.
LOGIQ 500 Basic Users Manual
2233658–100 Rev. 0
Additional Cardiac Calculations
S/D A/B HEART
Ratio RATE
PI RI
TRACE
AUTO
Transf
CALCs
for PI.
MAX
and Vd.
MAX
10–29