Dräger Perseus A500 - Page 73

Instructions for use Perseus A500 SW 2.0n 73
Assembly and preparation
Example of calculation: Adult hose with filter on Y-piece, no filters on the ports.
Since R
Inspiration is greater than –6 hPa (cmH2O)
and R
Expiration is less than 6 hPa (cmH2O), this
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.
Resistance [hPa (cmH
2O)]
Inspiratory
at 30 L/min
Expiratory
at 30 L/min
Breathing system with reus-
able CO
2 absorber and
MX50115 soda lime dust filter
R
Breathing_system_insp –0.4 RBreathing_system_exp 2.6
Breathing hose - R
Insp_hose 0.5 + RExp_hose 0.5
Breathing bag hose - R
Breathing_bag_hose 0.3
Filter at inspiratory port - R
Insp_filter(port) 0
Filter at expiratory port + R
Exp_filter(port) 0
Filter at Y-piece - R
Insp_filter(Y-piece) 2+ RExp_filter(Y-piece) 2
Result R
Inspiration –3.2 RExpiration 5.1