Manual Trace/Accel. / Ps/Ed Velocity Ratio; Ri (Resistance Index); Pi (Pulsatility Index); Pg (Pressure Gradient) Measurements: Pg Mean/Pg Max - GE Voluson Swift Instructions For Use Manual

Measurements and Calculations
Manual Trace
Accel.
PS/ED Velocity Ratio

RI (Resistance Index)

PI (Pulsatility Index)

Note

PG (Pressure Gradient) Measurements: PG mean/PG max

10-12
3. Accept the result (Peak Systolic/Diastolic Velocity, Min./End/Mean Diastolic Velocity,
Velocity Time Integral, TAmax) . The measurement is finished and
switched off.
To use this manual trace tool:
Manual Trace . The measurement cursor appears.
1. Select
2. Position the starting point and fix it with
3. Trace the envelope boundary and enter the end point to finish the measurement. The
values (Peak Systolic/Diastolic Velocity, Min./End/Mean Diastolic Velocity, Velocity Time
Integral, Heart Rate, Slope, Pressure Gradient Mean, Time, TAmean, PeakA) are
calculated and displayed.
To measure the acceleration:
Accel . The measurement cursor appears.
1. Select
2. Position the first point with the trackball and press
3. Position the second point of the measurement and press
To calculate the Peak Systolic Velocity and the End Diastolic Velocity Ratio:
PS/ED . The measurement cursor appears.
1. Select
2. Move the cursor to the peak systolic velocity and press
3. Position the second cursor at the end diastolic velocity and press
To measure the RI:
RI . The measurement cursor appears.
1. Select
2. Move the cursor to the peak systolic velocity and press
3. Move the second cursor to the end diastolic velocity and press
To measure the PI:
PI . The measurement cursor appears.
1. Select
2. Move the cursor to the start of the measurement and press
3. Trace the curve.
4. Move the second cursor to the end of the measurement and press
To readjust the traced line press Undo repeatedly.
To measure PGmax:
PGmax . The measurement cursor appears.
1. Select
2. Move the cursor to the pressure gradient point and press
To measure PGmean:
PGmean . The measurement cursor appears on the screen.
1. Select
Set .
Set . A second cursor appears.
Set .
Set . A second cursor appears.
Set .
Set . A second cursor appears.
Set .
Set .
Set to fix the marker.
Voluson™ SWIFT / Voluson SWIFT+ Instructions For Use
Auto Trace is
Set .
5831612-100 Revision 4