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 Systems.

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:

1. The Vacuum Phase
The chamber is evacuated, reducing internal pressure in preparation for the subsequent reaction.
2. 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.
3. 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.
4. 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 devices.
5. 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 immediate use.