Patient Monitor User Manual Monitoring IBP
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WARNING
4 Due to the short measurement delay, do not use sidestream CO
2
as a direct
reference to determine the end point of the breath in the pressure curve.
5 If the balloon is not inflated but the pulmonary artery floating catheter enters the
wedge position, the pulmonary artery pressure waveform becomes wedge-shaped.
Follow the standard steps to take appropriate action to correct this situation.
6 PAWP measurement is not applicable to pediatric and neonate patients.
14.7 Calculating CPP
CPP is calculated by subtracting MAP and ICP, it means: CPP = MAP-ICP.
14.7.1 Calculation Procedures
To calculate CPP:
1. Click the ICP parameter area to enter into ICP Options interface, select Setup to enter into
ICP Setup > CPP Source; CPP source is defaulted as the currently opened artery, it can be
selected as Art, P1 or P2. If there is more than one arterial pressure at the same time, the priority
level should be: Art > P1 > P2.
2. Take P1 as example: if P1 is selected as CPP Source, when MAP and ICP are both measured,
ICP area will display CPP and its value as below picture, unit is same as ICP. Invalid CPP will
display “-?-”. CPP will be closed if exit ICP parameter.
14.8 Calculating PPV
Pulse Pressure Variation (PPV) is calculated from the specific arterial pressure values, which
reflects the variation between the maximal pulse pressure and the minimum pulse pressure in 30
seconds. Pulse pressure is affected by left ventricular-stroke volume, arterial resistance and
arterial compliance.
WARNING
1 The clinical value of the derived PPV information must be determined by a physician.
According to recent scientific literature, the PPV information is restricted to sedated
patients who receive controlled mechanical ventilation and without arrhythmia.
Whether the calculation results in other situations are clinically significant, applicable
and reliable must be determined by a physician.
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