前田 佳孝

With the aim of designing an interface that supports troubleshooting of a dialysis machine, a medical-engineer (ME) cognitive task analysis was conducted in this study, with the error messages currently provided by a hemodialysis machine also being analyzed and evaluated. First, we developed the “error-message mechanism diagram” for the given problem, indicating the relationship between the error message and the notifying conditions of this message (corresponding to the candidate for the cause of the problem). Next, we developed the “cognitive task flow diagram,” which shows the cause candidates generated by the ME until the source of the problem was detected. This diagram also clarifies the manner in which the ME verifies the cause candidates and the information or knowledge employed by the ME. Then, for the given problem, we compared the cognitive task flow diagram of an ME who successfully detected the problem cause and corresponding error-message mechanism diagram to evaluate the efficacy of the error messages currently provided by the device.

アイトラッキングに用いるアイマークレコーダー(EMR)というデバイスを利用して、血液透析のスタッフ作業を対象とする研究に取り組んできた。それらを以下の項目に分けて紹介した。1)作業者の認知プロセスと情報処理、2)臨床で人間工学を利用するために、3)EMRの利用と問題点、4)人工心肺操作における熟達者と初学者の注意領域(透析以外の例)、5)血液回路の準備における習熟特性、6)治療における不具合判断プロセス評価、7)今後の研究展開とレジリエンスなスタッフ育成、として述べた。