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Studies on the Operative Factors Affecting the Reduction of Chronic Subdural Hematoma, with Special Reference to the Residual Air in the Hematoma Cavity Kazuya NAGATA 1 , Takao ASANO 1 , Norihiko BASUGI 2 , Toshiro TANGO 3 , Kintomo TAKAKURA 4 1Department of Neurosurgery, Saitama Medical Center 2Department of Neurosurgery, Kanto Rosai Hospital 3Department of Epidemiology, The National Institute of Public Health 4Department of Neurosurgery, University of Tokyo Keyword: Chronic subdural hematoma , Operative method , Closed system drainage , Residual air , Tension pneumocephalus pp.15-20
Published Date 1989/1/10
DOI https://doi.org/10.11477/mf.1436202753
  • Abstract
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The authors previously reported the effect of preop-erative factors affecting the reduction of chronic subdu-ral hematoma. In this report, we evaluated some opera-tive factors, including operative methods, duration of drainage, and residual air volume, with newly de-veloped CT volumetry technique. As described before, the hematoma volume reduces exponentially. An ex-ponential curve was fitted to the reduction curve using the least square method, and its half reduction days (HRD) was calculated. This HRD represents a mathe-matical indicator of the reduction rate of CSDH.


Copyright © 1989, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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