9
WARNINGS
Clean, dry, regulated gas supplies at 50 ±5 psi (345 ±34.5 kPa) must be used at all times
or malfunction may result. Note carefully that the logic gas supply should be 100% oxygen
at all times to give the greatest accuracy of the control settings and to assure the most
trouble-free operation. The supply connected to the patient supply connector may be
either: 100% oxygen, air from a dry gas medical air compressor system or a blended
mixture of air and oxygen.
A TWO-WAY SAFETY RELIEF VALVE is installed internally. This valve opens when
pressure in the hose delivering gas to the patient rises above 120 cmH
2
O ±10 cmH
2
O or
falls below -4 cmH
2
O. Its purpose is to limit maximum circuit pressure and to allow patient
inspiration in the unlikely event of failure of the gas supply. It must be maintained and its
screen side clear and unobstructed. It is meant to allow spontaneous breathing for a short
time only until the operator can respond to the disconnect alarm and rectify the supply
malfunction. In such a situation, its use in a contaminated environment could be
hazardous.
Do not re-use disposable breathing circuits.
Do not use in a MRI room unless the IC-2A has been built by Bio-Med Devices for such an
environment. This will be indicated by a MRI plaque on the top of the unit and a “M” at the
end of the serial NUMBER.
If the ventilator is to be used unattended or without remote monitoring, a high/low pressure
alarm must be used at all times with the user within visual and/or audible range of this
alarm. Recommended monitors for this purpose are Bio-Med Devices’ M-1 or M-10.
Any HUMIDIFIER used with the IC-2A must be a "flow-through" type having a low pressure
drop. Use of a humidifier with a "bubbler" tube or pressure jet will render the SAFETY
RELIEF VALVE ineffective.
CAUTIONS
The IC-2A ventilator is intended for use by qualified clinical personnel only. This instruction
manual should be read in its entirety before using the equipment.
Always test the IC-2A each time before connecting to the patient.
As noted later in the text of this manual, the IC-2A time cycle settings are affected by large
changes in barometric pressure, flow rates, and gas composition. They are repeatable,
however, within 5% under constant conditions. As with any ventilator, periodic blood gas
studies should be made to insure proper levels of ventilation.
A one-way valve
is installed internally in the patient manifold. This valve opens when
pressure in the hose delivering gas to the patient falls below -4 cm h
2
o. Its purpose is to
allow patient inspiration in the event of gas supply failure. It is meant to allow spontaneous
breathing for a short time only until the operator can respond to the disconnect alarm and
rectify the supply malfunction.
A patient filter should always be used with the IC-2A to prevent cross contamination and
protect the patient.
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