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9. Ventilator Controls
9.1 Electronic module
9.1.1 Power Switch (5 positions)
OFF- CPAP- CMV- PTV- SIMV
• OFF = All electrical power off.
Note: There is a limited fresh gas supply with power
switch in the OFF position, if ventilator is used with
Headboxes etc. switch to CPAP.
Switching to CPAP. CMV. PTV or SIMV (power on),
POWER LED shows green and an automatic test of functions & alarms is initiated.
Firstly the displays and audible alarms are turned on for approximately two seconds
to demonstrate that they are operable, then for a further three seconds all the digital
displays show a sequence of numbers from O to 9 before returning to their normal
state.
Note: Block LEDs do not come on during this sequence.
9.1.2 System Fail LED
Lights if main microprocessor system or other electronic circuitry fails (See section
on alarms page 39 )
9.1.3 CPAP Mode
FlO
2
, mean and min airway pressure digital displays. The Manual Breath
pushbutton and associated with it the 'High', 'Low', 'Failure to Cycle' and 'Fresh
Gas' alarms. Also activated is the INSP. Time control for maual breath. The time
of this breath and pressure must be preset by the user. The mean airway pressure
in CPAP will show an average of airway pressures.
9.1.4 CMV Mode
Enables the BPM control and INSP. TIME controls to set and display the rate and
MIT of the ventilator cycles, and from these settings calculates and displays the l:E
ratio.
• If these controls are set outside valid safety limits their respective displays will
flash. The position of last control adjusted should be decreased to bring the
adjustment to valid safety settings and stop the display from flashing.
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