PROBLEM TO BE SOLVED: To provide an active oxygen species sensor structure capable of preventing the sensitivity of an active oxygen species sensor from being deteriorated due to so-called interference substances such as an ascorbic acid or a uric acid contained in blood.SOLUTION: An active oxygen species sensor structure is equipped on the distal end of a catheter to be inserted into a blood vessel. The sensor structure includes: a cylindrical body formed to be hollow and having an opening penetrating through the inside and outside, an active oxygen species sensor equipped inside the cylindrical body so that at least a part thereof can extend to the inside of the opening of the cylindrical body, a complex film formed on the surface of the reactive oxygen species sensor, and a first porous film for covering the surface of the complex film which is positioned at the side of the opening of the cylindrical body.COPYRIGHT: (C)2013,JPO&INPIT【課題】血液中に含まれるアスコルビン酸や尿酸などの所謂妨害物質により活性酸素種センサの感度が低下し難い活性酸素種センサ構造体を提供する。【解決手段】本発明は、一の形態として、血管内に挿入するカテーテルの先端部に設けられる活性酸素種センサ構造体であって、中空で内外を貫通する開口が設けられた筒体と、少なくとも一部が前記筒体の開口の内側まで延出するように前記筒体の内部に設けられた活性酸素種センサと、前記活性酸素種センサの表面に設けられた錯体膜と、前記錯体膜における前記筒体の開口側の表面を覆う第1多孔質膜と、を備える活性酸素種センサ構造体を提供する。【選択図】図2
