2-30 624074/07
2 Preparing for ventilation
CAUTION
• To prevent damage to the ventilator, connect
only clean, dry medical-grade gases. Inspect for
water and particle build-up in the gas supply
water traps before each use.
• To prevent heliox entering the wall supply, con-
nect compressed air with a minimum pressure
of 2.8 bar.
NOTE:
• When using a compressor with the device ventilator,
connect a HAMILTON MEDICAL VENTILAIRII medical
air compressor only.
• Use heliox blend of 78% (He)/ 22% (O
2
)! The 78/22
mixture is preferred, as it allows the maximum
amount of helium to be used yet consumes less gas
when used in conjunction with mechanical ventila-
tion (80/20 and 79/21 mixtures are also permitted).
• Only use the HAMILTON MEDICAL mixer block with
inlet fittings for oxygen, air and heliox.
• Select the appropriate gas source in the
System
->
Gas source
window. A mismatch of selected and
actual source gas can result in inaccurate gas delivery
and volume monitoring.
• After switching between air and heliox, it is recom-
mended that you calibrate the flow sensor.
• After significant changes in oxygen concentration
during heliox ventilation, it is recommended that you
recalibrate the flow sensor.
• During heliox administration, O
2
monitoring is
enabled and CANNOT be disabled.
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