PROBLEM TO BE SOLVED: To provide a sterilization management indicator in which there is no temporal change in long period preservation, medical instruments are not contaminated in sterilization prcessing, and no consideration is needed to a method for discarding.SOLUTION: Sterilization management indicators 1, 3, 5, 7 is constituted such that stress concentration parts are formed by arranging cutout parts 2a, 2b, 4a, 4b, 6, 8 in bodies of thermoplastic resin whose glass transition temperature is at least a sterilization temperature. The history (temperature, humidity, time) of in the sterilization process is determined by measuring residual strain at stress concentration positions by creep (cols flow) under a high temperature and high humidity atmosphere in the sterilization management indicators 1, 3, 5, 7, consequently there is no concern to contaminate the medical instruments in the sterilization process because there is no temporal change an any chemical substance is not used even in the postprocessing in a long period preservation.COPYRIGHT: (C)2012,JPO&INPIT【課題】長期保存において経時変化がなく、滅菌過程で医療機器を汚損することがなく、廃棄方法に特別な配慮を不要とする。【解決手段】滅菌管理インジケータ1、3、5、7は、ガラス転移点が滅菌温度以上の熱可塑性樹脂の本体に、切欠部2a及び2b、4a及び4b、6、8が設けられて応力集中部分が形成された構成である。滅菌管理インジケータ1、3、5、7は、高温高湿雰囲気中でのクリ-プ(コールドフロー)による応力集中箇所での残留歪みを測定して、滅菌過程の履歴(温度・湿度・時間)を判定するため、長期保存において、経時変化がなく、後処理でも一切の化学物質を用いていないため、滅菌過程で医療機器を汚損する心配がない。【選択図】図1
