Airon pNeuton A, Руководство оператора

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pNeuton Ventilator 7 - 2
Pneumatic System Description
The major components of the pneumatic system and the
control of gas flow through the ventilator are as follows:
1. High pressure gas (oxygen) enters the ventilator
and is filtered (5 micron) and reduced to a lower
working pressure (35 psi - 240 kPa).
2. The timing circuit uses two precision control valves
to control inspiratory and expiratory time. These
valves charge (or reduce) pressure to a pneumatic
timing cartridge. This timing cartridge turns on or
off the ventilator's main flow valve.
3. The main flow valve controls gas flow from the
internal regulator to the % Oxygen control, which in
turn delivers it to the patient. The % Oxygen
control setting determines whether flow goes
directly to the patient or through the high flow
venturi. If gas is directed to the patient, a restrictive
orifice limits the flow to a specific flow rate (36
L/min). If gas is directed to the high flow venturi,
ambient air is entrained to provide precisely the
same flow to the patient, but at a reduced F
I
O
2
(approximately 65%). The high flow venturi
provides stable performance (no stall) up to the
maximum operating pressure (75 cm H
2
O) of the
ventilator.
4. The pressure generated by the main flow valve also
powers the Peak Pressure control system. This
system sends an adjustable pressure to the patient
circuit expiratory valve. The pressure in this
system determines the peak pressure that can be
generated in the patient circuit.
5. The adjustable PEEP / CPAP system directs a
pressure signal to the expiratory valve to generate
PEEP and provides flow on demand for
spontaneous breaths.