Penlon AV-S, Service Manual, Page: 27 / 94

3.7.2 Volume Mode
The ventilator delivers a mandatory set
volume of gas at preset, fixed breath
intervals.
The Patient is making no respiratory effort.
3.7.2.1
Fresh Gas Compensation
Adjusts delivered volume up to 60%
This delivered volume will consist of the
volume delivered from the ventilator bellows
plus the fresh gas flow from the anaesthetic
machine fresh gas supply, minus any
compliance loss and minus any leak.
This gives a total actual inspired tidal
volume.
An alarm is triggered if measured volume is
50% different than set volume
User adjustable
Altitude Compensation
Monitors ambient pressure
Adjusts delivered volume accordingly
3.7.2.2 Operating Functions
Inspiratory Pause function: Creates
25% plateau
Sigh function:
When the ventilator is in Volume Cycle
mode the "sigh" option is available. When
selected, this option provides extra volume
for 1 to 4 breaths in 50 (frequency is user
selectable).
The extra volume will be 50% above the
tidal volume set by the user.
Volumes measured if Spirometry function
selected
Auto High and Low volume alarms if
measured volume different by 50% of set
volume
User adjustable option
If max pressure limit achieved, ventilator
cycles to expiratory phase
3.7.2.3 Volume Type Selection
Use the menu to switch between Tidal
Volume and Minute Volume.
NOTE Minute Volume is derived from a rolling
average during a 30 second period.
Volume Mode Parameters
Tidal volume 20 – 1600 mL
Rate 4 – 100 bpm
I:E ratio 1:0.3 – 1:8
PEEP 'Off' or adjustable 4 – 30 cmH2O
Inspiratory pressure limit 10 to 80 cmH2O
Inspiratory pause 25%
(does not affect I:E ratio)
Sigh
1.5 x Set Vt is
delivered once, twice,
three times or four
times every 50
breaths (user selects
frequency)
DESCRIPTION
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