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はじめに
硬膜外血腫は,重症頭部外傷の中でも急性期に外科的処置を必要とし,かつ手術のタイミングが予後に大きな影響を与える病態であるが,その死亡率は20%を超えるとする報告が多い4,7,12,14).一方,古い文献ではあるが,Hooper7)やMckissock14)は硬膜外血腫の死亡率は10%が納得しうる数値であると述べている.著者らは,硬膜外血腫の転帰不良例を中心に臨床所見,CT所見などから予後を左右する因子に検討を加えた.
One hundred twenty cases of epidural hematoma without intradural lesion treated between 1975 and 1983 to which CT scan was available, were presented.
Mortality rate was 1.7% and morbidity rate was 6.7%. In all cases of epidural hematoma including with and without intradural lesion in the same term (164 cases), mortality and morbidity rate were 7.3 and 10.4% respectively. Ninety five cases were male and 25 cases were female. Causes of injury were falls from a height (42 cases, 35%), traffic accident (41 cases, 34%), and falls at ground level (24 cases, 20%).
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