脳血管写による多発性脳動脈瘤症例における破裂動脈瘤の判定

Angiographical Study of Ruptured Aneurysm in the Multiple Aneurysm Patients

I．はじめに

　多発性脳動脈瘤患者の外科的治療の場合，破裂した動脈瘤がどの動脈瘤であるかを判定する必要がある．破裂責任動脈瘤の判定は臨床症状，脳血管写，CT scanなどの所見を綜合して決定するが，本論文においては，脳血管のみで責任動脈瘤の判定がどの程度可能であるかについて，若干の知見を得たので諸家の報告とともに報告する．

Sixty four multiple intracranial aneurysm cases have been analysed for the purpose of identifying the relation between aneurysm rupture and aneurysmal features, mass signs, vasospasms and locations of the aneurysms.

1) 85% of the larger and largest aneurysm in each case were the ruptured aneurysm.

2) Aneurysms with a greater ratio of length to width showed a high frequency of rupturing.

3) Irreguralities of the aneurysmal wall and the existence of a daughter aneurysm attached to the main aneurysm have a tendency to rupture.