The breakthrough technology behind STERRAD Sterilization Systems.
The limitations of traditional instrument sterilization methods, including ethylene
oxide gas (EtO) and steam led ASP researchers to develop an alternative sterilization
technology in the early 80s. The result? A unique method based on a patented
process implementing low-temperature hydrogen peroxide gas plasma. This evolutionary
technology formed the basis for the revolutionary STERRAD Sterilization
The ASP technology uses a combination of hydrogen peroxide vapor and low-temperature
gas plasma to rapidly sterilize medical instruments without leaving toxic residues.
With this technology STERRAD Sterilization Systems sterilize your instruments
and medical devices safely and effectively, without the limitations or risks
associated with peracetic acid, steam, and ethylene oxide gas (EtO) systems.
The ASP technology, which is particularly suited to heat-sensitive and moisture-sensitive
instruments, includes 5 phases:
The Vacuum Phase
The chamber is evacuated, reducing internal pressure in preparation for the
The Injection Phase
A measured amount of liquid peroxide is injected into the chamber, evaporating
the aqueous hydrogen peroxide solution and dispersing it into the chamber,
where it kills bacteria on any surface it can reach.
The Diffusion Phase
The hydrogen peroxide vapor permeates the chamber, exposing all load surfaces
to the sterilant and rapidly sterilizes devices and materials without leaving
any toxic residues. At the completion of this phase, the chamber pressure
is reduced and the plasma discharge is initiated.
The Plasma Phase
An electromagnetic field is created in which the hydrogen peroxide vapor breaks
apart, producing a low-temperature plasma cloud that contains ultraviolet
light and free radicals. Following the reaction, the activated components
lose their high energy and recombine to form oxygen and water.
Phases 1, 2, and 3 are then run a second time for added efficacy. This built-in
reprocessing assures optimal sterilization for even the most difficult-to-sterilize
The Vent Phase
The chamber is vented to equalize the pressure enabling the chamber door to
be opened. There is no need for aeration or cool-down. Devices are ready for