Dräger Perseus A500 Instructions For Use Manual page 73

Example of calculation: Adult hose with filter on Y-piece, no filters on the ports.
Breathing system with reus-
able CO absorber and
2
MX50115 soda lime dust filter
Breathing hose
Breathing bag hose
Filter at inspiratory port
Filter at expiratory port
Filter at Y-piece
Result
Since R is greater than –6 hPa (cmH
Inspiration
and R is less than 6 hPa (cmH
Expiration
configuration may be used.
Depending on the breathing circuit in use, the
connected accessories, and the resistance of the
patient's airways, air trapping (incomplete
expiration) may occur with some ventilation
settings.
The effects are, for example, a reduced minute
volume in pressure-controlled ventilation or higher
mean airway and peak pressures in volume-
controlled ventilation.
Air trapping can be prevented on the anesthesia
machine by the following measures:
– Adjusting the respiratory rate and inspiratory
time
– Changing the configuration of breathing hoses
and accessories that carry gases during the
expiratory time
It is the responsibility of the user of the medical
device to select the most suitable remedial
measure.
Instructions for use Perseus A500 SW 2.0n
Resistance [hPa (cmH
Inspiratory
at 30 L/min
R
Breathing_system_insp
- R
Insp_hose
- R
Breathing_bag_hose
- R
Insp_filter(port)
- R
Insp_filter(Y-piece)
R
Inspiration
O)
2
O), this
2
Assembly and preparation
O)]
2
Expiratory
at 30 L/min
–0.4 R
Breathing_system_exp
0.5 + R
Exp_hose
0.3
0
+ R
Exp_filter(port)
2 + R
Exp_filter(Y-piece)
–3.2 R
Expiration
2.6
0.5
0
2
5.1
73