頭部外傷データバンク【プロジェクト2009】における自転車事故に関連したデータの検討

抄録

Purpose: Bicycling has recently emerged as a social issue due to its frequencies of traffic accidents. However, even a longstanding problem of wearing no helmet or riding under influence of alcohol for leisure remains unsolved.

Material and Methods: To correlate sex, age, circumstance of injury, admission GCS, alcohol, helmet wear, neurosurgical operation, diagnosis of brain injury, and discharge GOS, we have extracted 119 from 1,091 bicycle accidents registered head trauma data bank project 2009.

Results: These 119 cases consisted of 78 males and 41 females, ranging from 6 to 91 years. The helmet use rate was as low as 7/119 (6%) while alcohol use was confirmed in 19/119 (16%). Neurosurgical operation was performed in 79/119 (66%) to treat the following brain lesions: acute epidural hematoma in 24/79 (30%), acute subdural hema­toma in 31/79 (39.2%), brain contusion in 6/79 (7.6%), acute subdural hematoma plus brain contusion in 6/79 (7.6%), acute epidural hematoma plus acute subdural hema­toma in 2/79 (2.5%), brain swelling in 6/79 (7.6%), de­pressed fracture in 1/79 (1.2%), and others in 3/79 (3.8%). Outcomes were rated as GR in 26/119 (22%), MD in 21/119 (18%), SD in 18/119 (15%), VS in 10/119 (8%) and D in 44/119 (37%). The deceased included 32/119 (27%) that wore no helmet and 21/119 (18%) that had taken alcohol. GR was rated most frequently in the young whereas the aged were ranked as SD, VS or D in most cases. Meanwhile, 15-year-old or younger cases were 15/119 (12%) and nobody wore a helmet. Neurosurgical operation was performed on 11/15 (73%). Outcomes were better overall as follows: GR in 9/15 (60%), MD in 1/15 (6.6%), SD in 2/15 (13.4%), VS in 0/15 (0%), and D in 3/15 (20%).

Conclusion: Bicycle-related injury is caused by a combination of various factors. If we intend to look for factors to prevent a head trauma in bicycle accidents, it is very im­portant to gather more detailed data on pre-accident situations.