Nationwide co-operative study of intracranial aneurysm surgery in Japan.

Abstract

A cooperative study was made of 4750 intracranial aneurysm cases collected from 133 neurosurgical clinics in Japan by letter inquiry for the period of 2 years from January 1974 to December 1975. Among them, 4124 cases (87%) had a single aneurysm, and 626 cases (13%) had multiple ones. Direct radical surgery was done in 78% of all cases, carotid ligation in 2% and non-surgical treatment in 17%. Direct surgery in a mortality rate of 15% for ruptured aneurysm cases and 7% for nonruptured cases. Radical surgery within 24 hours after rupture had a mortality of 51%, while those within 1 week and 2 weeks were 39% and 30% respectively; grade I or II patients, however, showed much better surgical results even in early operations. The neurosurgical clinics included in this study were spread throughout most of Japan. Micro-surgical technic was already in use of aneurysm surgery at the time of this study in Japan.

• Authors: A Nishimoto, K Ueta, H Onbe, K Kitamura, T Omae, F Goto, G Ohneda, H Chigasaki, M Tsuru, J Suzuki
• Journal: Stroke (Stroke) Vol. 16 Issue 1 Pg. 48-52 ( 1985) ISSN: 0039-2499 [Print] United States
• PMID: 3966265 (Publication Type: Journal Article)

Topics

• Adolescent
• Adult
• Aged
• Child
• Child, Preschool
• Data Collection
• Female
• Humans
• Infant
• Infant, Newborn
• Intracranial Aneurysm (epidemiology, surgery, therapy)
• Japan
• Male
• Middle Aged
• Risk
• Rupture, Spontaneous
• Time Factors