Sterilization of Tubular Medical Instruments Using Wire-type Dielectric Barrier Discharge
نویسندگان
چکیده
In this study, sterilization of tubular medical instruments such as catheter and breathing circuit was studied using a wire-type dielectric barrier discharge(DBD) under atmospheric pressure condition. To investigate sterilization factors of DBD under the air condition, we carried out the sterilization experiments using Geobacillus stearothermophilus spores under various gas conditions, such as air, 100% N2 gas, and N2 and O2 gas mixtures. It is deduced that the sterilization factors are synergetic effects of UV emission, ozone and OH radicals generated by discharge and/or chemical reaction of water molecule in the air due to UV excitation. In addition, we demonstrated a twisted wire-type DBD using two copper wires with diameter of 0.2mm by applying a voltage of ±0.75kV at a frequency of 5 kHz. Using the wire-type DBD, we confirmed the discharge inside resin tube for the medical with inner diameter of 4mm and length of 80cm.
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