Instructions for use Carina SW 3.2n 149
Principles of operation
PC-BIPAP
Pressure Control – Biphasic Positive Airway Pres-
sure
Intermittent, triggered, pressure-controlled ventila-
tion allowing spontaneous breathing (open system)
during the entire respiratory cycle and pressure
support
Pressure-controlled ventilation
The upper pressure level is determined by Pinsp.
The duration of the inspiratory phase of a manda-
tory breath is determined by Ti. As in all pressure-
controlled ventilation modes, the tidal volume sup-
plied depends on the difference in pressure "Pinsp
– PEEP", the lung mechanics (resistance and com-
pliance) and the patient's respiratory drive. The
pressure rise from the lower pressure level PEEP
to the upper pressure level Pinsp is defined with
the Ramp setting.
Synchronization
The mandatory breaths can be triggered by the pa-
tient's inspiratory effort on PEEP level. The manda-
tory breaths can be synchronized with the inspira-
tory efforts of the patient by setting the trigger level.
A mandatory breath can only be triggered within a
"trigger window" by the flow trigger in synchrony
with the patient's inspiratory effort. This prevents
the mandatory breath being applied during sponta-
neous expiration.
036
Paw
PEEP
1
Fast pressure
rise
Ti
Flow
RR
t
t
Pinsp
Without spontaneous
breathing
With spontaneous
breathing
Trigger window
Pressure support
Slow pressure rise
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