Using the Z Vent Ventilator
4-18
www.zoll.com
9650-002360-01 Rev. A
For PIP High and Low Alarm limits, the user can set the High PIP alarm from 20 to 100 cm
H
2
0 and the low PIP alarm from 3 to 35 cm H
2
0, or turn OFF the Low PIP alarm.
Note:
PEEP cannot be set within 5 cm H
2
0 of the High PIP setting.
Warning!
Set the PIP Low Limit to be at least PEEP +5. This reduces the likelihood of not
detecting a kinked hose. Setting the PIP Low Limit just below the PIP can also serve to
detect leaks and patient circuit as a PIP compensated disconnected threshold.
To change an a PIP secondary parameter, follow these steps:
1. Press the PIP parameter button more than once until desired alarm threshold highlights in
the PIP parameter window.
2.
Turn the
Dial
to set a parameter value.
3.
Press the
Accept
button.
Context Menu
The PIP context menu provides the user the ability to adjust the pressure needed to trigger a
breath minimizing the work of breathing and prevent auto-triggering in the presence of leaks
and very high motion environment.
When ventilating infants and other patients with weak inspiratory effort, the trigger threshold
may need to be adjusted. To reduce the work required for the patient to trigger a breath,
decrease the magnitude.
To prevent auto-triggering, the magnitude of the trigger pressure may need to be increased.
(This should be done with caution as it will increase the work of breathing and may lead to
asynchrony.)
The Spontaneous/Assisted Breath Trigger is preset to -2.0 cm H
2
O and can be adjusted from
-6.0 to -0.5 cm H
2
O below the baseline (PEEP) pressure. To initiate a spontaneous or assisted
breath, the patient must generate -2.0 cm H
2
O. When the pressure drop is detected, an assisted
breath is delivered. The trigger automatically adjusts when the PEEP is changed. The set
Trigger Level threshold displays on the bottom of the screen.
Warning!
Set the trigger level so as to minimize the patient's inspiratory effort and prevent
autotriggering. When ventilating infants and other patients with weak inspiratory
effort, lower the trigger threshold magnitude (> -2cm H2O) to reduce the work required
for the patient to trigger a breath. If a large leak is present while ventilating in CPAP or
BL with LC turned on, the trigger threshold magnitude may need to be increased to
prevent auto-triggering with the variable baseline pressure.
Airway pressure measurements are also displayed. The Airway Pressure waveform
(0 to 100 cm H2O) is plotted over time with indications of the PEEP and PIP high limit. See
Figure 4-1. The Mean Airway Pressure (MAP) measurement (0 to 99.9 cm H2O) is provided in
the auxiliary box area of the ventilator display.
