和式トイレ使用による総腓骨神経麻痺の1例

Common Peroneal Nerve Palsy Caused by Use of a Japanese-style Toilet. Case Report

　今回われわれは和式トイレ使用により生じた総腓骨神経麻痺を経験したので報告する．症例は21歳の女性で，和式トイレを使用した後より，左足関節の背屈が不可能となった．初診時，総腓骨神経支配筋の筋力低下を認め，下腿外側から足背にかけて軽度の知覚障害を認めた．電気生理学的検査では腓骨頭で複合筋活動電位の振幅の低下，伝導速度の低下を認めた．1カ月後の再検査では筋力，電気生理学的検査とも回復した．経過，発症機序，和式トイレ使用により起こりうる障害などを考察し，予防法と対策について検討した．

　We report a case of common peroneal nerve palsy following use of a Japanese-style toilet. A 21-year-old female noticed that her left foot dropped after using a Japanese-style toilet, which requires that the user squat on the floor. Examination at our hospital revealed that the muscles supplied by the common peroneal nerve were weak and sensation in the common peroneal nerve area was reduced. A nerve conduction test at the neck of the fibula revealed deterioration of CMAP and conduction velocity. She was treated conservatively, and assessment of the common peroneal nerve symptoms and a nerve conduction test showed recovery after one month. We describe the course of common peroneal nerve palsy following the use of a Japanese-style toilet.