Citation

Miyauchi H, Hori M, Tanaka S. J. Japan Soc. Safety Eng. 2018; 57(4): 280-285.

Vernacular Title

酸素欠乏事故に対する課題と装着形酸素濃度計の活用

Copyright

(Copyright © 2018, Japan Society for Safety Engineering)

DOI

10.18943/safety.57.4_280

PMID

unavailable

Abstract

Even if the oxygen concentration before starting of a work is normal, as time passes, the concentration sometimes falls. As prevention against the anoxia-risk, we thought that it was important for the worker to wear a real-time oxygen deficiency indicator because worker can know oxygen deficiency faster. For this reason, I tried to response characteristics tests of simulation on two patterns which are the main causes of asphyxiation. In the oxygen consumption test using a small testing apparatus, no clear difference in oxygen concentration reduction due to difference in temperature or measurement position was observed. On the other hand, in the oxygen-deficient-air experiment using nitrogen gas, the wearable real-time oxygen deficiency indicator put on the ankle and chest were able to detect lowering of oxygen concentration faster than the oxygen deficiency indicator fixed close to the wall side. These results indicated the possibility of reducing an anoxia-risk by wearing a wearable type oximeter appropriate position by the worker.

労働災害による酸素欠乏症による死亡率は高い．死亡率を下げるには，酸欠災害リスクの認識と評価を行い，評価に応じた対策を講じることが重要である．対策の課題として，作業の進行とともに酸素濃度が低下することが上げられる．作業者がリアルタイムで酸素濃度を把握し，作業者自身にて酸欠のリスクをより早く知ることは有効と言える．装着形酸素濃度計を用い，酸欠災害に結びつく主な原因である2 つのパターンについてシミュレ－ションを行った．窒素ガスを用いた酸欠空気の噴出・流入試験では，足首部や胸部に装着した場合，定点位置に設置した酸素濃度計よりも早く酸素濃度の低下を検出した．作業前の酸素濃度作業環境測定のみならず，作業者の適切な胸元や足首位置に酸素濃度計を装着することは，酸欠災害に対するリスクの低減化に有効と言える．

Language: ja

Keywords

Risk Assessment; リスクアセスメント; Anoxia-risk; Oxygen Deficiency; Oxygen Deficiency Indicator; Real-time Indicator; リアルタイム測定器; 酸素欠乏; 酸素欠乏症; 酸素濃度計