開頭術術後に発生した慢性硬膜下血腫の3症例

Three Cases of Chronic Subdural Hematoma developing after Direct Aneurysmal Surgery

Ⅰ．はじめに

　慢性硬膜下血腫は脳神経外科臨床ではごくありふれた疾患の1つである．しかし本症が開頭術後に発生することはきわめて稀といわれ，著者渉猟の範囲内でも特に症例を纒めて報告したものはなかった^{1，7，15）}．教室においては1975年9月末までに201例の慢性硬膜下血腫を経験したが，開頭術後のものは3例（1.5％）であった．今回はこの3症例を紹介し若干の文献的考察を加える．

　なお，shunting operation後に発生するいわゆる慢性硬膜下血腫は形態学的には類似するものもあるが問題点が多いため^12），本論文では除外した．

Three cases of chronic subdural hematoma developing after direct aneurysmal surgery were presented. All patients were males and heavy drinkers. There was no history of head injury after craniotomy. In two of the three cases, the angiography was performed on the 12th postoperative day. An avascular area was already revealed on the postoperative angiograms, but there were no disorders at that time. The intervals between the aneurymsal surgery and the onset of symptoms of chronic subdural hematoma ranged from about two to three months.