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

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
DOI: 10.1161/01.str.16.1.48 Publication Date: 2011-06-17T20:08:03Z
ABSTRACT
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
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