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PTP
(cmH
2
O*s)
Monitoring 1 Inspiratory pressure time product. The mea-
sured pressure drop required to trigger the
breath multiplied by the time interval until the
PEEP/CPAP level is reached at the beginning of
inspiration.
Both PTP and WOBimp (see below) indicate
work by the patient to trigger the breath. The
work depends on
• the intensity of the patient’s effort,
• the trigger type and sensitivity, and
• the volume and resistance of the breathing
circuit.
PTP and WOBimp are valid for patient-initiated
breaths only.
Neither PTP nor WOBimp indicates total patient
work. But both indicates of how well the venti-
lator is adapted to the patient.
If PTP and WOBimp values increase:
• Check and remove water in tubes.
• Switch to flow trigger.
• Increase trigger sensitivity.
Pulse
(1/min)
Monitoring 2 Pulse rate of the patient measured by the SpO
2
sensor.
Pulse inc
(%)
Monitoring 2 Quick Wean parameter. Percentage increase in
heart rate. This is calculated during a spontane-
ous breathing trial (SBT).
For details, see the Quick Wean chapter in the
INTELLiVENT
®
-ASV manual.
QI-HLI Monitoring 2 Quality Index of the HLI reflects the reliability of
the HLI value expressed in percentage. The
greater the QI value the greater reliability of the
HLI value.
Table 7-1. Monitored parameters
Parame-
ter (unit)
Monitoring
Window
Definition
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