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MECHANICAL STUDIES OF HELMETS IN HEAD INJURIES Shigeru Kobayashi 1 1Dept. of Neurosurgery, Tokyo Univ. School of Medicine pp.63-75
Published Date 1963/1/1
DOI https://doi.org/10.11477/mf.1406201400
  • Abstract
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(1) The author reviewed 154 cases of head injury caused by falling on the head or being struck on the head with a falling object, since these kinds of trauma are relatively sim-ple from a dynamical point of view and take place more frequently in comparison with head injury due to other causes.

The author studied the velocity with which a patient was struck, the momentum and the mechanical energy, and correlated these factors with the duration of impaired consci-ousness, the roentogenographic findings ofthe skull and the E. E. G. findings. It was con-cluded that the impact energy was the one which was correlated most closely with the clinical findings.

(2) The helmet may be the only possible tool provided against head injury. Wearing a helmet has become more popular and genera-lized. There can be found, however, few literature about the effect of a helmet based on a medical point of view. The author studied the effect of a helmet for head injury in view of the "energy" which is the most correlative factor with the clinical findings and found that the difference of the impact energy between cases with and without a helmet having the same clinical symptoms, corresponded approximately 500 to 1,000 joules. The value, however, varies according to the types of the helmet, especially to the quality of a cushion inserted between the helmet and head.


Copyright © 1963, Igaku-Shoin Ltd. All rights reserved.

基本情報

電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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