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TURBINE UNIT
The turbine unit consists of a variable speed DC motor and a rotary compressor.
The turbine unit generates flow and pressure by changing motor speeds.
TURBINE PRESSURE SENSOR
This sensor measures the pressure at the ventilator outlet. The ventilator software
uses this value and the RPM of the turbine’s motor to control PEEP. The sensor
also performs as a backup device to the airway pressure sensor.
TURBINE VALVES
The two turbine valves of different sizes are electromechanical solenoid valves
normally closed during the inspiratory phase allowing the gas mixture to flow
from the turbine unit to the patient breathing circuit. During the expiratory phase,
the valves are open to release pressure in the patient circuit. An air path from the
patient breathing circuit to the manifold and air inlet filter is present.
OVER PRESSURE RELIEF VALVE
If the control system fails to limit the turbine pressure to a maximum level of 80
cmH2O, this valve relieves at 80 cmH2O.
AIRWAY FLOW AND PRESSURE SENSORS
A differential pressure transducer is attached to the patient breathing circuit at
the proximal airway. This device measures both inspired and expired values.
PRESSURE SWITCH
A pressure switch in the iVent
TM
201 monitors whether sufficient Oxygen pressure
is connected to the unit (approximately 0.7 bar). If insufficient oxygen pressure is
available, a low O2 pressure alarm occurs.
INLET AND OUTLET MUFFLERS
An inlet muffler that sits just behind the air inlet filter and an outlet muffler just
after the turbine unit reduce the level of noise generated by the air flow in the
system.
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