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4.4.
Program 4: Wrapped Delicate Instruments
For wrapped Handpieces when the instrument manufacturer
recommends autoclaving at temperatures of 249.8°F (121°C) with a
drying stage.
Nominal parameters default settings
Sterilization temperature: 249.8ºF (121ºC).
Sterilization time: 20 minutes.
Drying time: 20 minutes (may be increased by the operator (see sec.
5.1.1), other parameters are set and cannot be altered).
Operations Sequence
•
Air-removal stage: a series of vacuum pulses are performed.
•
Heating stage: steam is injected into the chamber, from the steam
generator, until the sterilization temperature is reached.
•
Sterilization phase: temperature and pressure are maintained constant
at the pre-set level during the sterilization time.
•
Fast exhaust: steam is exhausted out of the chamber at a fast rate until
pressure decreases to ambient pressure.
•
Drying phase: a continuous vacuum along with heating of the chamber
to dry the instruments efficiently and quickly.
•
Drying is followed by a vacuum break so chamber pressure can
equalize to atmospheric pressure.
