6-23
The first three cycles of AMV is PCV experimental ventilation to calculate patient’s lung
resistance and compliance. Initial ventilation parameters are:
Adult experimental ventilation cycle setting parameters
IBW (kg) Pinsp(cmH
2
O) Tinsp(s) f(/min)
10-29 15 1 15
30-39 15 1 14
40-59 15 1 12
60-89 15 1 10
90-99 18 1.5 10
≥100 20 1.5 10
Pediatric experimental ventilation cycle setting parameters
IBW (kg) Pinsp(cmH
2
O) Tinsp(s) f(/min)
3-5 15 0.4 30
6-8 15 0.6 25
9-11 15 0.6 20
12-14 15 0.7 20
15-20 15 0.8 20
21-23 15 0.9 15
24-29 15 1 15
30-35 15 1 14
After three experimental ventilation, enter the automatic adjustment stage. Based on the
principle of minimum WOB, ensure that the actual minute volume is as close as possible to
the preset minute volume value. Mandatory ventilation is administered if the patient has no
spontaneous breathing. Support ventilation is administered if the patient restores spontaneous
breathing.
The following figure shows typical waveforms in AMV mode.
Pressu re
Flow
Time
Time
Test
ventilation
Pressure
support level
Exp%
Inspiratory
trigger icon
Patients without
spontaneous patient
breathing
Mechanically
operated ventilation
Patients with
spontaneous breathing
Pressure support
Mechanically
operated pressure
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