Sterilization of narrow tube inner surface using discharge plasma, ozone, and UV light irradiation

Satoshi Kitazaki, Akimasa Tanaka, Nobuya Hayashi

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    Sterilization of medical equipment is an important procedure in the field of medicine. However, methods for sterilizing medical equipment such as catheters or endoscopes have yet to be established. We developed novel sterilization methods to sterilize the inner surface of a tube using low-pressure discharge plasma, atmospheric pressure ozone, and ultraviolet (UV) light irradiation. Generation of active oxygen and hydroxyl (OH) radicals were measured by a chemical indicator and a spectrum analysis of light emission from the plasma. A biological indicator with Geobacillus stearothermophilus was used to evaluate the sterilizing ability. A tube 1000 mm long and 4 mm in diameter was successfully sterilized for 30 min using air and water vapor discharge. Furthermore, the atmospheric pressure method sterilized the tube in 1 min. Compared to conventional methods, sterilization using discharge plasma, ozone, and UV light irradiation is safe for the human body and harmless to the environment.

    Original languageEnglish
    Pages (from-to)217-220
    Number of pages4
    JournalVacuum
    Volume110
    DOIs
    Publication statusPublished - Dec 2014

    All Science Journal Classification (ASJC) codes

    • Instrumentation
    • Condensed Matter Physics
    • Surfaces, Coatings and Films

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