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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.
4.8.5
Connecting a non-rebreathing system
Non-rebreathing systems are suitable and intended only for manual ventilation or
spontaneous breathing. Observe the configuration required for this. Connection is
only possible with the "External fresh-gas outlet" hardware 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.
WARNING
Risk of excessively high airway pressure
Without a relief valve or breathing bag, airway pressure may become too high.
► Only non-rebreathing systems with breathing bags or relief valves in accordance
with ISO 80601-2-13 may be connected.
1. Select a suitable non-rebreathing system.
WARNING
Risk of faulty gas delivery
Faulty gas delivery and insufficient gas supply when a non-rebreathing system is
used may put the patient at risk. Thus O
be monitored for non-rebreathing systems.
► The sample line must be connected to the mask and the water trap on the
anesthesia machine.
► Provide for suitable gas monitoring conforming to ISO 80601-2-55.
► Provide suitable O
|
Instructions for use
Atlan A100 (XL), A300 (XL), A350 (XL) SW 2.1n
, CO
2
monitoring for devices with inspiratory O
2
Assembly and preparation
, and any anesthetic gases must also
2
measurement.
2
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