Operating Manual OXI-dive
TM
1
Page 10 of 19
5 Operation of the Closed Circuit Breathing System
1. Set the KDK85 Autovalve to 2 L/min.
2.
OPEN the APL (exhaust valve) by gently rotating the knob one (1) TURN
ONLY in an ANTICLOCKWISE direction.
3.
Position the size 5 face mask on the casualty's face with the narrow part
between the casualty's eyes.
4.
Depress the Oxygen Flush cap of the KDK85 Autovalve to rapidly fill the
breathing bag until it is about 7/8 full and then release.
5. Observe the breathing bag:
IF THE BREATHING BAG RHYTHMICALLY FILLS AND EMPTIES
the
casualty is breathing. Maintain adequate head tilt and jaw support, monitor the
casualty and continue to observe the breathing bag.
IF THE BREATHING BAG DOES NOT MOVE RHYTHMICALLY,
close the APL
exhaust valve one turn CLOCKWISE and squeeze the breathing bag. There are only three
possibilities, all of which can be immediately diagnosed:
(i)
IF THE BREATHING BAG WILL NOT COMPRESS
easily, the casualty's
airway is obstructed (partially or completely).
Check head tilt and jaw support.
Check airway is clear.
Reposition the face mask, depress the cap to fill the bag, and try again:
(ii) IF the breathing bag collapses, there is a leak, probably due to an inadequate
seal of the face mask. Reposition the mask and push the Oxygen Bypass cap
to refill the breathing bag. If necessary, increase the flow rate to compensate
for leaks.
(iii) If the breathing bag compresses readily and refills on release of pressure, the
casualty is not breathing. Ventilate the casualty by compressing the breathing
bag at the appropriate rate, just strongly enough until the chest starts to rise.
Management of A Spontaneously Breathing Casualty
To provide the highest oxygen concentration (90-100 %) to a breathing casualty, the
closed circuit should be used whenever possible.
a) Using the Closed Circuit
1. Ensure that the casualty is breathing.
2.
Explain to the casualty what is involved during the administration of
Oxygen.
3.
If practicable turn an unconscious, breathing patient into the left
lateral position. However take special care if a spinal injury is
suspected.
4.
Ensure the face mask is positioned correctly and that a good mask seal
is obtained.
5. Open the APL exhaust valve (1 full turn anti-clockwise).
6.
Set the flow rate to 8 L/min. Depress the Oxygen Flush to rapidly fill
the breathing bag.
7.
After 5 minutes, reduce the flow rate to 2 L/min as long as the bag
remains adequately inflated. For a diver with suspected
