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Example of parts for plasma sterilization    Plasma Sterilization
Process Description

In medical technology, plasma sterilisation is increasingly being used today alongside the conventional sterilisation methods. This process is characterised by the following special features:

    Excellent sterilisation effect
    Very gentle treatment of the material being sterilised
    Very good environmental compatibility
    Low energy consumption


Using a plasma in a vacuum chamber, an oxygen-based gas is electrochemically activated and decomposed at room temperature. The resulting highly reactive oxygen atoms and ions burn bacteria, germs and viruses cold to produce carbon dioxide, without exposing the material being sterilised to high temperatures. A further germ-destroying effect in the plasma is the ultraviolet radiation produced during the ionisation of the reaction gas which can act unfiltered directly on the germs and bacteria. For treatment in the plasma, the parts to be sterilised are placed into a vacuum chamber. The sterilisation process then takes place in the following steps:

    The vacuum chamber is evacuated to a process pressure of 100-1000 Pa.
    An oxygen-based reaction gas is admitted to the treatment chamber
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The process is then maintained for a given time until all the germs have been killed off.

To date medical apparatus and consumables have been predominantly sterilised in thermal, chemical or radioactive process:
During thermal sterilisation, superheated water vapour is generally used which kills off the germs with the high temperature. However, this method is not suitable for many products made of plastics due to the thermal burden

The toxic chemical formaldehyde is generally employed during chemical sterilisation. Apart from its environmental impact, formaldehyde has the negative characteristic of reacting chemically with many products employed in medical technology.

Radiation-based sterilisation operates predominantly with radioactive radiation sources. With this method, highly toxic radioactive substances are employed to kill off the germs with their hard radioactive radiation. This often causes radioactive damage to the material being sterilised.

PlaTeG GmbH
A Company of the PVA TePla Group
Postfach 210642
57030 Siegen
Deutschland / Germany

Managing Directors: Dr. Reinar Grün ; Arnd Bohle
Amtsgericht Siegen, HRB 8070  ;  USt.Id. DE 814730669
e-mail: service@plateg.de

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