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

• DOI: 10.1161/01.str.16.1.48
• Publication Date: 2011-06-17T20:08:03Z
• Authors: A Nishimoto; K Ueta; H Onbe; K Kitamura; T Omae; F Goto; G Ohneda; H Chigasaki; M Tsuru; J Suzuki
• Keywords: Adult; Male; Risk; Time Factors; Adolescent; Rupture, Spontaneous; Data Collection; Infant, Newborn; Infant; Intracranial Aneurysm; Middle Aged; 3. Good health; 03 medical and health sciences; 0302 clinical medicine; Japan; Child, Preschool; Humans; Female; Child; Aged

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