FujiFilm SonoSite SII, User Manual Supplement

Page: 35 / 476

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Measurements and calculations 33
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To calculate Cardiac Output (CO) automatically
Make sure that the flow rate is 1 L/min or greater. The system can maintain accuracy of the measurements
only if the flow rate is 1 L/min or greater.
1 Measure from LVOT:
a On a frozen 2D image, tap Calcs .
b On the CO calculations menu, tap LVOT D .
c Position the calipers by dragging.
d Tap Save Calc to save the calculation.
2 Trace automatically in Doppler. The automatic trace tool always measures the peak regardless of the Live
Trace setting in Presets setup.
a Display the live Doppler spectral trace.
b Tap the arrow to navigate to the next page.
c Tap Trace , and then select Above or Below to position the automatic trace tool relative to the baseline.
d Freeze the image, then tap Calipers .
e Tap Auto .
A vertical caliper appears.
f Using the touchpad or the touchscreen, position the caliper at the beginning of the desired waveform,
and then tap .
A second vertical caliper appears
WARNINGS

To avoid incorrect calculation results, make sure that the Doppler signal does not
alias.

To avoid an incorrect diagnosis:

Do not use automatic Cardiac Output calculations as the sole diagnostic
criteria. Use them only in conjunction with other clinical information and
patient history.

Do not use automatic Cardiac Output calculations in neonatal or pediatric
patients.

To avoid inaccurate velocity measurements if you use PW Doppler, make
sure that the angle is set to zero