Pulse Wave (PW) Mode Double Velocity measurement gives extra calculations such as RI (Resistive index) and SD (Systolic/diastolic (S/D) ratio) that a single velocity measurement does not.
To Measure Peak Systolic Volume (PSV), End Diastolic Volume (EDV), and Resistive Index (RI)
- Freeze the image by tapping .
- Tap onand select .
- Tap on the crest of the waveform to get the PSV, and the trough of the waveform to get the EDV. The RI will get calculated automatically. You can move the points to get a more accurate reading.