title: [The effect of gas concentration on ethylene oxide sterilization].
abstract: Ethylene oxide (EO) gas is widely used for sterilization of medical instruments and supplies. The gas being used in our hospital consists of 20% EO and 80% carbon dioxide and is packed in a cylinder as liquefied gas. We investigated the relationship between the composition of the gas and the amount of EO gas used by measuring the EO concentration in a sterilizer. The concentration of EO was increased as the amount of gas increased, and it decreased sharply when the remaining gas in the cylinder decreased up to about 12% of its initial value. This value agreed with the calculated one by gas-liquid equilibrium when all of the liquefied gas was consumed and only saturated gas remained in the cylinder.
authors.affiliation: Department of Environmental Health Engineering, University of Occupational and Environmental Health, Kitakyushu, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Hori
authors.forename: Y
authors.initials: Y
authors.lastname: Miura
authors.forename: A
authors.initials: A
authors.lastname: Kojima
mesh_terms: D005027:Ethylene Oxide / Q000008:administration & dosage*; D005740:Gases; D013242:Sterilization / Q000295:instrumentation / Q000379:methods
chemical_list: D005740:Gases; D005027:Ethylene Oxide