Introduction
The STERRAD
®
100 Sterilizers are intended for use in hospitals and
other medical service institutions for the purpose of sterilizing medical
instruments and other equipment. The product employs the proprietary
STERRAD Hydrogen Peroxide Gas Plasma Sterilization Process to
achieve 10
-6
Sterility Assurance Level (SAL) in a cycle time of
approximately 75 minutes (51-72 minutes for the STERRAD
100 S
System). This process does not create toxic by-products nor dangerous
heat levels and requires no special venting or piping. Many types of
medical instruments and equipment can be safely and completely
sterilized with this process.
This section presents the general Theory of Operation for the STERRAD
100 Systems. Each subsystem section has more detailed theory about
the subsystem.
Remember, when you see the STERRAD icon, as with this paragraph,
this indicates that the information pertains to a different system
configuration other than the standard Block 1.8 system.
Theory of Operation-Overview
The STERRAD Sterilization Process occurs in the following manner:
F
The items to be sterilized are placed in the sterilization chamber, the
chamber is closed, and a vacuum is drawn.
F
An aqueous solution of hydrogen peroxide is injected into the
chamber where it vaporizes, surrounding the items to be sterilized.
F
After a period of hydrogen peroxide diffusion, the pressure is reduced
in the chamber. The formation of a low-temperature gas plasma is
initiated by applying radio frequency (RF) energy to create an electric
field.
F
In the plasma state, the hydrogen peroxide vapor breaks apart into
reactive species that include free radicals.
F
The combined use of hydrogen peroxide vapor and plasma, safely
and rapidly sterilizes most medical instruments and materials
without leaving toxic residues.
F
Following the reaction, the activated components lose their high
energy and recombine to form primarily oxygen, water and other
non-toxic by-products.
F
When the process is complete, the RF energy is turned off, the
vacuum is released and the chamber is returned to atmospheric
pressure by venting through a High Efficiency Particulate Air (HEPA)
filter. The items within are sterilized and ready for use.
System Operation
Introduction
2-2
STERRAD® 100 Sterilizer
ASP Service Guide rev. D
Содержание STERRAD 100
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