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An experimental study on chronic compression injury of the spinal cord due to kyphotic deformity.

Research Project

Project/Area Number 60440071
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field Orthopaedic surgery
Research InstitutionOsaka Medical College

Principal Investigator

ONOMURA Toshinobu  Osaka Medical College, Professor, 医学部, 教授 (90025560)

Co-Investigator(Kenkyū-buntansha) 小林 一朗  大阪医科大学, 医学部, 助手 (20195770)
田中 真一郎  大阪医科大学, 医学部, 助手 (00148412)
渡辺 秀男  大阪医科大学, 医学部, 助手 (90026899)
岸本 郁男  大阪医科大学, 医学部, 講師 (50140158)
Project Period (FY) 1985 – 1988
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥20,300,000 (Direct Cost: ¥20,300,000)
Fiscal Year 1988: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1987: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1986: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1985: ¥17,000,000 (Direct Cost: ¥17,000,000)
KeywordsSpinal distraction / spinal cord evoked potentials / Spinal cord blood flow / experimental compression of spinal cord / Kyphotic deformity / 脊柱後弯変形 / 圧迫性脊髄麻痺
Research Abstract

In order to evaluate the influence of the traction on the spinal cord function due to ischemic changes of the spinal cord, the spinal cord blood flow and the spinal cord evoked potentials in response to strong and weak stimulation was measured in mature rabbits under spinal column traction. In animals subjected to a traction corresponding to approximately 32% of the vertebral body length, the amplitude of evoked potential in weak stimulation increased transiently, whereas the amplitude in strong stimulation declined slowly. The blood flow at this time was decreased to 10ml/min/100g, suggesting spinal cord dysfunction. For the diagnosis of spinal cord injury due to ischemia, observation of the amplitude changes in response to weak stimulus appeared to be indispensable even if the amplitude changes in strong stimulation remained within a safe range.
By posterior ( posterior method ) or anterior ( anterior method ) manipulation of the rabbit spinal column, an animal model with kyphotic def … More ormity with a constant pressure on the spinal cord was prepared. The dynamic compression by the spinal deformity appeared to be the major cause of spinal cord inixiry, whereas the static pressure appeared to be responsible for the injury in the anterior method. None of these models showed paralysis, probably serving as the model for the initial stage of chronic compression spinal cord damage. However, in all cases, measurement of the spinal cord evoked potential revealed some potential changes. This method thus appeared to be very useful for the detection of subclinical spinal cord injury due to chronic compression. The prolongation of conduction time was more pronounced in the posterior method, although the decrease in amplitude appeared to be more pronounced in the anterior method. It is considered that demyelination is readily occurred on dynamic compression such as the posterior method, while the static compression as in the anterior method tends to cause axonal degeneration. Qualitative difference in spinal cord injury may be caused by the differences in the mode of compression itself, such as the presence or absence of the mobility of the kyphotic portion, or by differences in the secondary factors associated with each compression modality. Less

Report

(5 results)
  • 1989 Final Research Report Summary
  • 1988 Annual Research Report
  • 1987 Annual Research Report
  • 1986 Annual Research Report
  • 1985 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 小林一朗: "脊髄血流と脊髄誘発電位の関連性について" 中部日本整形外科災害外科学会誌. 29. 1701-1706 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 小林一朗: "脊椎牽引時における脊髄血流と脊髄誘発電位の変化について" 日本整形外科学会誌. 62(2). S-170 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 中島幹雄: "脊柱後弯変形による脊髄圧迫障害に関する実験的研究ー第1報ー脊髄漸増圧迫モデル動物の作製" 中部日本整形外科災害外科学会誌. 31. 757-762 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 中島幹雄: "脊柱後弯変形による脊髄圧迫障害に関する実験的研究ー第2報ー後方あるいは前方操作による後弯変形" 中部日本整形外科災害外科学会誌. 32. 141-144 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 中島幹雄: "脊柱後弯変形による脊髄圧迫障害に関する実験的研究ー第3報ー動的あるいは静的圧迫による脊髄誘発電位の変化" 日本整形外科学会誌. 63(7). S-1044 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Ichiro KOBAYASHI: "An experimental study on spinal cord evoked potential in decreased spinal cord blood flow" Cent.Jpn.Orthop.Traumat.29. 1701-1706 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Ichiro KOBAYASHI: "The effect of spinal traction on spinal cord evoked potential with special reference to spinal cord blood flow" J.Jpn.Orthop.Assoc., 62(2):S-170, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Mikio NAKAJIMA: "A study on the experimental kyphotic deformity of rabbits -1st. report" Cent.Jpn.Orthop.Traumat., 31:757-762, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Mikio NAKAJIMA: "A study on the experimental kyphotic deformity of rabbits -2nd. report" Cent.Jpn.Orthop.Traumat., 32:141-144, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Mikio NAKAJIMA: "A study on the experimental kyphotic deformity of rabbits -3rd. report" J.Jpn.Orthop.Assoc., 63(7):S-1044, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 小林一朗: 中部日本整形外科災害外科学会誌. 29. 1701-1706 (1986)

    • Related Report
      1988 Annual Research Report
  • [Publications] 小林一朗: 日本整形外科学会誌. 62(2). S-170 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 中島幹雄: 中部日本整形外科災害外科学会誌. 31. 757-762 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 中島幹雄: 中部日本整形外科災害科学会誌. 32. 141-144 (1989)

    • Related Report
      1988 Annual Research Report
  • [Publications] 中島幹雄: 第4回 日本整形外科学会基礎学術集会.

    • Related Report
      1988 Annual Research Report
  • [Publications] 小林 一朗: 中部日本整形外科災害外科学会誌. 29. 1701-1706 (1986)

    • Related Report
      1987 Annual Research Report
  • [Publications] 小林 一朗: 日本整形外科学会誌. 62(2). S-170 (1988)

    • Related Report
      1987 Annual Research Report
  • [Publications] 中島 幹雄: 中部日本整形外科災害外科学会誌.

    • Related Report
      1987 Annual Research Report
  • [Publications] 中島 幹雄: 第70回 中部日本整形外科災害外科学会.

    • Related Report
      1987 Annual Research Report
  • [Publications] 小林一朗: 中部日本整形外科災害外科学会雑誌. 29. 1701-1706 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 中島幹雄: 第68回 中部日本整形外科災害外科学会.

    • Related Report
      1986 Annual Research Report
  • [Publications] 小林一朗: 第2回 日本整形外科学会基礎学術集会.

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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