Patient Monitor User Manual Monitoring IBP
- 146 -
16.8 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.
2
In below situations, the calculated PPV value may be inaccurate:
- the respiration rate is lower than 8 rpm
- the tidal volume during ventilation is lower than 8 ml/kg
- patients have acute right ventricular functional disorder (pulmonary heart disease)
3
PPV measurement has been validated only for adult patients.
PPV is calculated according to the following equation:
PPV= (PPmax – PPmin)/(PPmax + PPmin)/2) * 100%
To select an arterial pressure as PPV source:
1.
Click the PPV parameter area to enter
PPV Setup
menu.
2.
Select
Art
,
P1
,
P2
, or
AUTO
as
PPV Source
.
Only when P1 and P2 are arterial pressure can they be selected as PPV source. When it is set to
AUTO
and if there is more than one arterial pressure at the same time, the priority level should
be: Art > P1 > P2.
NOTE:
PPV results will not be recorded.
