Section 4
Preuse Checkout
C. Make sure a 19 mm scavenger hose is connected between
the bottom of the absorber pole and the scavenger
interface.
D. Check for moisture accumulation in the breathing and
scavenger hoses. Remove any moisture found.
E. Short circuit the absorber’s inspiratory and expiratory
valves with a 22 mm breathing hose.
F. Set the absorber’s manual/automatic selector valve to
AUTO.
G. If the system is equipped with a PEEP valve, turn the
PEEP valve control knob fully counterclockwise to its
lowest setting.
H. Open the oxygen flow control valve to a flow of 10 l/min
and occlude the 19 mm scavenger terminal labeled
EXHAUST.
I. After the ventilator bellows inflates, the flow of oxygen
exits the system through the positive pressure safety relief
valve. At this point, the absorber system’s breathing
pressure gauge must indicate a pressure of less than 10
cmH
2
O.
Manual and
Automatic Ventilation
Systems
*9. Test the ventilator.
A. Check for proper pressure and flow at the Y-piece during
the inspiratory and expiratory phases. Turn the SYSTEM
POWER switch and ventilator power switch to their ON
positions. Place the manual/automatic selector valve in the
AUTO position. Adjust the oxygen flow control valve to a
3 l/min flow. Set the ventilator frequency to 3 BPM, the
I:E ratio to 1:2, and the tidal volume to about 1 liter. (If
testing the Pediatric Bellows or Adult/Pediatric Bellows,
adjust the tidal volume to 200 ml.)
Adjust the ventilator inspiratory flow control to the
maximum of the “low” zone on the flow gauge. Occlude the
patient side of the Y-piece. Fill the ventilator bellows by
pressing the oxygen flush button. Observe the breathing
system pressure gauge as the ventilator cycles.
4-6
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