34 Hygienic preparation
6.2 Patient valve
1. Disconnect the patient valve from the hoses.
2. Dismantle the patient valve as shown in the ad-
jacent diagram. It is neither necessary nor per-
missible to remove the membrane in the
spontaneous breathing nozzle for cleaning and
disinfection.
3. Clean the components under running water.
4. Brush the parts of the patient valve inside and
outside thoroughly, using a normal soft labora-
tory bottle brush.
5. Carry out sterilization/disinfection.
6. Make sure all internal and external surfaces are
thoroughly wetted and free from bubbles. Wait
for the full disinfection time to elapse.
7. Then rinse the components thoroughly inside
and out with distilled water.
8. Dry the components thoroughly.
9. Reassemble the patient valve.
When reassembling, make sure that the lip
membrane is correctly positioned. The patient
valve may not function properly if it contains
residual water!
The lip membrane must be replaced if it is
crinkled, sticky or misshapen.
10. Always perform a functional check before reus-
ing the valve (note “7.3 Checking patient hose
system“ on page 42).
spontaneous
breathing
nozzle
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