Operation Of The Ventilator - ResMed Elisee 150 Clinical Manual

Sensor
Internal temperature sensor.
Hall-effect turbine speed sensor.

Operation of the ventilator

Outside air is sucked in through an anti-dust filter.
It may be enriched with oxygen using the low-pressure oxygen port (max 400kPa). The FiO
monitored using a dedicated chemical sensor (if the oxygen monitoring option is activated).
The turbine then compresses the oxygen/air mixture. The turbine enables closed-loop control of
the required pressures and flow rates.
The turbine speed is regulated by the microprocessor on the basis of the set parameters. It is
controlled either by the inspiratory flow sensor in the volumetric modes, or by the proximal
pressure sensor in the pressure modes.
At the turbine outlet, a valve controlled by a stepper motor accurately controls the level and shape
of air pressure and flow.
An I/E solenoid valve controls the expiratory valve, which in turn controls the inspiratory and
expiratory times.
There is also a microturbine which can generate a counter-pressure during the expiratory phase
to maintain the level of PEEP.
A sensor dedicated to triggering detects pressure demands.
For safety reasons, an inspiratory valve allows the patient to breathe spontaneously regardless of
the status of the ventilator.
A temperature sensor monitors increases in internal temperature, and controls the cooling fans.
Two solenoid valves (auto offset) enable automatic recalibration of the inspiratory flow sensor
offset.
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Measurement range
0 – 100°C
0 – 65,000rpm
is
2
NOT013189-6