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The Plasma Sterilizer operates on 3-Phase, 208v power. The device is one of the more recent low-temperature plasma sterilizers made by
Plasma Sterilizer

Plasma Sterilizer made by STERRAD® System

STERRAD® System. Made by Advanced Sterilization Products, a Johnson & Johnson Company (Irvine, Calif). The STERRAD® uses hydrogen peroxide vapor and low-temperature gas plasma to sterilize most devices quickly with no toxic residues. Usually, the process takes about 75 minutes for wrapped and dry instruments and devices. Inside the chamber, a deep vacuum is drawn. Fifty-nine percent (nominal) aqueous hydrogen peroxide is vaporized into the chamber. The product is then enveloped in the hydrogen peroxide vapor. Following the diffusion of the gaseous hydrogen peroxide through the load, chamber pressure is reduced, allowing for the generation of low-temperature gas plasma. Radio frequency (RF) energy is applied to the chamber via an RF amplifier, inducing the plasma state. Reactive species are generated from the hydrogen peroxide in this state, reacting with materials and each other. Once the high-energy species have reacted, they recombine to form water vapor, oxygen, and other non-toxic byproducts.

Upon completion of sterilization, instruments are dry and wrapped/pouched for immediate use or sterile storage. Thus, re-contamination risk is minimized, and since they remain sterile until their next use, time and money is saved by avoiding reprocessing instruments if the case in canceled or delayed. The STERRAD® system takes up minimal space and requires no venting or water hookup. The only utility requirement is electrical hookup.


Theory

Plasma sterilization is used for moisture-and heat sensitive devices, such as cameras, scopes and light cords. Five different models of Sterrad® sterilizers are available, and they operate at temperatures varying from 104°F-131°F (40°C-55°C). Advantages of plasma sterilization include speed and safety of use, and the process does not require aeration. There are five phases to the Sterrad® sterilization cycle: [1]

  • vacuum
  • injection
  • diffusion
  • plasma
  • vent

and there are four stages to the process:

  • pre-exposure
  • exposure 1
  • diffusion
  • exposure 2

Main Components

The main ingredient used for sterilization is a high concentration Hydrogen Peroxide (H2O2), approximately 59%. Common H2O2 in the household is approximately 3%.

  • Hydrogen Peroxide Cartridge: The cartridges designed for the H2O2 viles to complete 2 complete cycles.
  • Vacuum Pump: Creates vacuum in the chamber
  • Radio Frequency (RF) Generator: Applies the frequency to H2O2 and turns it to plasma
  • A/C Enclosure
  • Main PC
  • UV Light: Senses H2O2 saturation levels
  • Vaporizer Plate: Disperses the H2O2 through 4 injection points inside the chamber. (2 on each side)

Link

Reference

  1. Petro, Carol., Perdue University Sterile Department. "Basics of Plasma Sterilization" [1]


See also

Sterilizers

Video

thumb|300px|right|STERRAD Plasma Sterilization

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