GE CARESCAPE, User Manual

Page: 245 / 548

Invasive pressures
3. Set the alarm limits.
Invasive pressures alarm priorities
You can select priorities for the Art high/low , ABP high/low , Fem high/low , FemV
high/low , CVP high/low , PA high/low , RAP high/low , RVP high/low , LAP high/low ,
ICP high/low , CPP high/low , and P1 high/low to P8 high/low alarms through Alarm
Setup > Alarm Priorities > Invasive Pressures . The choices are Low , Medium , High ,
and Escalating .
Systolic pressure variation and pulse pressure
variation
Systolic pressure variation (SPV) and pulse pressure variation (PPV) can provide useful
information for example when assessing the effects of fluid therapy on the cardiac
output of a patient. A parameter window with both SPV and PPV values appears on
the display provided that SPV has been selected to the screen and the arterial site
selected as the SPV source is active.
The SPV and PPV measurement is automatic, and SPV can also be taken manually.
With the NICU software package, no automatic SPV or PPV are available , only the
manual SPV can be used.
NOTE
The SPV and PPV measurements are reliable for mechanically
ventilated patients with no arrhythmias, and when the arterial
site selected as the SPV source is providing reliable readings.
Changing the SPV source
1. Select the invasive pressure parameter window.
2. Select Art , ABP , Fem or UAC .
3. Select the Setup tab.
4. Select SPV Source > Art , ABP , Fem , or UAC . You can also turn off the measurement
by selecting Off (default).
Measuring SPV manually
The SPV can also be measured manually. In addition to ECG1 and the selected SPV
source, one of the following parameters is displayed in this order: Paw, CO
2
, Resp. You
can set the SPV cursors to define the difference between the minimum and maximum
systolic peak pressures.
1. Select the SPV and PPV parameter window.
2. Select Freeze Waveforms .
3. Adjust the cursors with the arrow selectors.
NOTE
You must always adjust the cursors in the NICU software
package. The monitor does not suggest any cursor
positions as there is no automatic SPV measurement in
this software package.
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