Abstract
Medical instruments are generally sterilized by high pressure steam, ethylene oxide gas (EOG), or gamma radiation. However, high pressure steam needs higher than 121 ℃ and 2 atm, the EOG has a toxic consequence and takes long time for an operation. In addition, the cost of gamma radiation is high. Therefore we focus on sterilization using plasma. Plasma sterilization can sterilize a wide range of materials jn ambient temperature. In this study, we develop the sterilization device by air plasma using circulating flow, and evaluate the efficiency of the device by using biological indicators.
