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Measurements and calculations
5-31
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
under the measurement name.
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
under the measurement name.
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.
Содержание SONOSITE X-PORTE
Страница 1: ...USER GUIDE ...
Страница 75: ...Setting up the system 3 39 ...
Страница 76: ...3 40 Setting up the system ...
Страница 128: ...4 52 Imaging ...
Страница 186: ...5 58 Measurements and calculations ...
Страница 210: ...6 24 Measurement references ...
Страница 234: ...8 16 Cleaning and disinfecting ...
Страница 262: ...9 28 Safety ...
Страница 334: ...10 72 Acoustic output ...
Страница 364: ...B 14 Index printing 5 56 zoom 4 23 ...
Страница 365: ......
Страница 366: ...P14645 05 P14645 05 ...