急性外傷性気脳症

Acute Traumatic Pneumocephalus

Ⅰ．はじめに

　CT scanが頭部外傷の診断に絶大な威力を発揮することは衆目の一致するところである．このことは外傷性気脳症の診断に際しても同様であり，最近かかる症例の報告も散見される^14,16）．そこで著者らは，当施設にて経験した頭部外傷例のうち，外傷性気脳症について，その頻度ならびに空気の進入機序と，その予後を検討したので報告する．

The authors have encountered sixteen cases of acute traumatic pneumocephalus (7.4%) out of 217 acute head injury patients hospitalized in Department of Critical Care Medicine, Nippon Medical School, Sendagi, Tokyo, during the period from April, 1977 to August, 1979. They were all diagnosed by means of computed tomography performed immediately after admission.

They were divided into two types of pneumocephalus according to the manner in which the air entered the cranial cavity. In case that the air entered directly through open depressed fractures or injured skull defects, it was classified as "direct type".