FujiFilm SonoSite X-Porte User Manual page 159

To calculate Pressure Half Time (PHT) in MV, AI, or TV
1 On a frozen Doppler spectral trace, tap Calcs.
If this control is hidden, tapping More Controls displays it.
2 On the MV/MR, AV/LVOT/AI, or TV/TR calculation list, tap PHT.
3 Drag the first caliper to the peak.
A second caliper appears.
4 Position the second caliper:
a In MV, drag the caliper along the E-F slope.
b In AV, drag the caliper to the end diastole.
5 Save the calculation: Tap
To calculate Isovolumic Relaxation Time (IVRT)
1 On a frozen Doppler spectral trace, tap Calcs.
If this control is hidden, tapping More Controls displays it.
2 On the MV/MR calculation list, tap IVRT.
A vertical caliper appears.
3 Drag the caliper to the aortic valve closure.
A second vertical caliper appears.
4 Drag the second caliper to onset of mitral inflow.
5 Save the calculation: Tap
To calculate Delta Pressure: Delta Time (dP:dT)
To perform the dP:dT measurements, the CW Doppler scale must include velocities of 300 cm/s or greater
on the negative side of the baseline (see
1 On a frozen CW Doppler spectral trace, tap Calcs.
If this control is hidden, tapping More Controls displays it.
2 On the MV/MR calculation list, tap dP:dT.
A horizontal dotted line with an active caliper appears at 100 cm/s.
3 Drag the first caliper along the waveform at 100 cm/s.
A second horizontal dotted line with an active caliper appears at 300 cm/s.
4 Drag the second caliper along the waveform at 300 cm/s.
Measurements and calculations
under the measurement name.
under the measurement name.
"Controls in Doppler" on page 4-16).
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