8-5
8.9 PEEPi
The PEEPi measure function supports measurement of two parameters—PEEPi and Vtrap.
PEEPi is the positive end-expiratory pressure produced by the trapped gas and Vtrap is the
trapped gas volume.
1. Push the Menu key. Select [Tool] and select [Procedure].
2. Select [PEEPi] to access the PEEPi measure screen.
3. Select [Start]. The system starts PEEPi measurement and prompts [Measurement
Active].
4. After the measurement is completed, the measurement result is displayed. The ventilator
can display the last three measurement results.
5. After the measurement is completed, waveforms and spirometry data are frozen
automatically.
8.10 P-V Tool
Mechanical ventilation set with the optimal PEEP can improve oxygenation, improve
alveolar mechanics and reduce injury to the lungs. By drawing static pressure-volume curve
(static P-V loop), P-V tool is the method to determine the optimal PEEP based on the
characteristic points on the static P-V curve. The doctor is able to determine the optimal
PEEP for the patient with the help of this function. After the P-V tool function is enabled,
PEEP is first adjusted to be equal to the set Pstart. Then gas is delivered at constant flow and
expiration is performed at constant flow. Inspiration trigger is forbidden during ventilation.
When static P-V loop measurement is completed, ventilation is restored automatically with
the previous vent mode and parameters.
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