34 Quick reference guide | Atlan SW 2.0n
Principles of operation
9.1.2 Degree of breathing support
SIMV/CMV Switching spontaneous breathing support on / off
Switching the synchronization on or off causes the following change to the ventilation
mode:
Pressure-controlled Volume-controlled
SIMV PC - SIMV VC - SIMV
CMV PC - CMV VC - CMV
When synchronization is switched on, mandatory breaths are synchronized with the
patient's inspiratory effort. In doing so, the respiratory rate RR is held constant by adapting
the mandatory breaths and the expiratory time. At the end of the expiratory phase, an
inspiratory trigger window is activated so that the mandatory breath can be initiated prema-
turely by up to 5 seconds (patient category Adult) or 1.5 seconds (patient categories Ped
and Neo). If the spontaneous inspiratory flow reaches the set value of the flow trigger Trig-
ger during this trigger window, a premature mandatory breath is triggered.
If no spontaneous breathing is detected within the inspiratory trigger window, a mandatory
breath will be triggered immediately afterwards.
FG O
2 Oxygen concentration in the fresh gas (only with electronically controlled gas mixer)
FG flow Fresh-gas flow (only with electronically controlled gas mixer)
Air / N
2O Carrier gas Air or N2O (only with electronically controlled gas mixer)
1) Whether the ventilation settings are based on Ti or the I:E ratio can be defined in the system setup.
Breathing sup-
port
Ventilation mode
None Standby, Pause, Monitoring
Low Man/Spon, CPAP, CPAP / PSV with ∆Psupp <5 hPa (cmH
2O)
Medium CPAP / PSV with ∆Psupp ≥5 hPa (cmH
2O)
High Volume-controlled modes
Pressure-controlled modes
Therapy controls Meaning / Function
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