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3.
Open the drain valve by turning it counter-clockwise. Allow the
vaporiser to drain.
4.
Open the dial slightly.
5.
If it is not possible to complete the draining process, close the drain
valve, loosen the bottom retaining screw, then remove the bottle
adaptor from the vaporiser. Remove the adaptor from the bottle.
Carefully shake the adaptor two or three times to clear the tube,
then reassemble and repeat instructions from stage 1.
6.
When draining is complete, close the drain valve (clockwise),
loosen the bottom retaining screw and remove the bottle adaptor.
Replace the dummy filler plug into the top filler socket and fully
tighten the top retaining screw in a clockwise direction. Then turn
the dial to "OFF".
Caution: If used infrequently, Halothane vaporisers shall be drained after
use.
Caution: If Halothane Vaporisers are used frequently, the vaporiser shall
be drained weekly and the liquid disposed of as a hazardous chemical.
Periodic draining of Halothane vaporisers is required because
Halothane contains thymol as a stabilizing agent which is less volatile
and will accumulate in the vaporiser, and can cause the output
concentration to decrease. The thymol residue may also have clinically
detrimental effects on the patient (see Rodenburg - Alila: Anaesthesia,
1984: 38: 581-583).
5.3.5 Quick Fill Filler (filling procedure)
Warning: Ensure that the drain screw; located on the bottom front of the
filler body; is correctly tightened to prevent loss of liquid agent.
1.
Remove the protective cap from the anaesthetic agent bottle filler,
Doc. No. 157
20 March 2019
Issue 1.0 Draft
Apollo Operations Manual
Page 19 of 27
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