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Instructions for use
|
Atlan A300, A300 XL, A350, A350 XL SW 1.0n
73
Assembly and preparation
Example of calculation: Adult breathing hose with filter on Y-piece, no filters
on the ports
Since R
Inspiration
is greater than –6 hPa (cmH
2
O) and R
Expiration
is less than 6 hPa
(cmH
2
O), 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. Air trapping can be recognized on the flow waveform
by the fact that the inspiration begins before the expiration has ended.
The effects are, for example, a reduced minute volume in pressure-controlled
ventilation or higher mean airway pressures 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.
4.8.4
Connecting a non-rebreathing system
Non-rebreathing systems are suitable and intended only for manual ventilation or
spontaneous breathing. This connection is only possible with the "External fresh-
gas outlet" option.
Since no rebreathing via the breathing system takes place when a non-rebreathing
system is in use, the fresh-gas flow must be set at least as high as the minute
volume.
Follow the instructions for use for the non-rebreathing system and the transfer
hose.
To prevent contamination of the ambient air with anesthetic gases, connect the gas
outlet of the non-rebreathing system to the inlet on the AGS.
Inspiratory resistance
[hPa (cmH
2
O)]
at 30 L/min
Expiratory resistance
[hPa (cmH
2
O)]
at 30 L/min
Breathing system with
reusable CO
2
absorber and
MX50115 soda lime dust fil-
ter
R
Breathing_sys-
tem_insp
–1.2
R
Breathing_system_
exp
2.9
Breathing hose
- R
Insp_hose
0.5
+ R
Exp_hose
0.5
Breathing bag hose
- R
Breath-
ing_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
+ R
Exp_filter(Y-piece)
2
Result
R
Inspiration
-4.0
R
Expiration
5.4