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1992 Fiscal Year Final Research Report Summary

A Study about the tomographic changes of three-dimensional reserve capacity of cerebral circulation with ageing.

Research Project

Project/Area Number 02671037
Research Category

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

Allocation TypeSingle-year Grants
Research Field 医学一般
Research InstitutionKagawa Medical School

Principal Investigator

TSUDA Yoshiyasu  Kagawa Medical School, Second Department of Internal Medicine, Assistant Professor, 医学部付属病院, 講師 (70201639)

Co-Investigator(Kenkyū-buntansha) YURA Takafumi  Kagawa Medical School, Second Department of Internal Medicine, Research Associat, 医学部付属病院, 助手 (40200878)
BANDAI Hisashi  Kagawa Medical School, Second Department of Internal Medicine, Research Associat, 医学部, 助手 (60208725)
NAGATSUKA Kazuyuki  Kagawa Medical School, Clinical Laboratory, Research Associate, 医学部付属病院, 助手 (70189140)
MATSUO Hirohide  Kagawa Medical School, Second Department of Internal Medicine, Professor, 医学部, 教授 (90028514)
Project Period (FY) 1990 – 1991
KeywordsSingle-photon Emission Tomography / In vivo red blood cell labeling / regional CBF / CBV ratio / Three dimensional reserve capacity of cerebral circulation / Ageing
Research Abstract

The cerebral circulatory reserve capacity is important to prevent cerebral ischemia. A reduction of the reserve capacity of cerebral circulation with ageing might be an important risk factor for the occurrence of ischemic cerebrovascular diseases in the elderly. We have been studied the hyperfrontality of the regional cerebral blood flow (rCBF) and vascular carbon dioxide reactivity and its disturbances with ageing up to the present time (14th International Salzburg Conference on Cerebrovascular Diseases, 1988, Second Annual Meeting of Japanese Society of Cerebral Circulation and Metabolism, 1990).
The aim of this study is to investigate the mechanism of the occurrence of cerebral infarctions in deep perforating cerebral arteries. We evaluated quantitatively of 1) carbon dioxide reactivity of tomographic regional cerebral blood volume (rCBV) by use of Tc-99m labeled red blood cell (RBC) Single-photon Emission CT (SPECT), and of 2) tomographic rCBF/CBV ratios by the evaluations of tomogr … More aphic rCBF with I-123 IMP SPECT, for the evaluations of changes of these parameters with ageing and selective vulnerability by the differences of regions.
As the result, 1) with respect to the rate of in vivo RBC labeling, we got 60-70 % labeling rate which was insufficient for the quantitative evaluations of rCBV, for which at least 90 % of labeling rate were necessary. 2) With respect to the measurements of tomographic rCBF, we evaluated semiquantitative rCBF indices of redistribution, asymmetry, and filling-in, in each region of interest of 2 x 2 cm. 3) The increase of arterial carbon dioxide tension by inhalation of 5 % carbon dioxide was insufficient for the constant evaluation of cerebrovascular carbon dioxide reactivity. It was difficult to maintain the arterial concentration to be constant for 30 minutes during the rCBF measurements. We observed an elevation of blood pressure, which was the unfavourable systemic effect by the carbon dioxide inhalation. The intravenous infusion of NaHCO_3 solution, instead of carbon dioxide inhalation, may cause metabolic alkalosis, which may be different from the true cerebrovascular carbon dioxide reactivity induced by carbon dioxide inhalation. The evaluations of tomographic cerebrovascular carbon dioxide reactivity were therefore unsuccessful. Less

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] TSUDA Yoshiyasu: "Changes of right-left asymmetry of regional cerebral blood flow with aging in normal subjects." Stroke. 21(Suppl). I-55 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] TSUDA Yoshiyasu: "Changes in right-left asymmetry and sex differences of regional cerebral blood flow with ageing evaluated by Xe-133 inhalation method." Neuroradiology. 33(Suppl). 263-266 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] TSUDA Yoshiyasu: "Right-left asymmetry and sex differences of rCBF changes with aging evaluated by Xe-133 inhalation method." J Cereb Blood Flow Metab. 9(Suppl2). S-788 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] TSUDA Yoshiyasu: "Semiquantitative regional cerebral blood flow evaluation using ^<123>I-IMP SPECT in a case showing transient ischemic attack caused by putaminal hemorrhage." Acta Neurol Scand. 84(5). 448-451 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] TSUDA Yoshiyasu: "Cortical blood flow reduction in capsular/putaminal aphasia syndromes shown by ^<123>I-amphetamine single-photon emission tomography." Neuroradiology. 33(Suppl). 621-623 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] TSUDA Yoshiyasu: "Persistent cortical blood flow decreases evaluated by I-123 IMP SPECT in patients with capsular/putaminal aphasia syndrom." J Cereb Blood Flow Metab. 11(Suppl2). S34 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] TSUDA Yoshiyasu: "Recovery of cortical blood flow and dementia after superficial temporal-middle cerebral artery bypass in a patient with severe carotid occlusive lesions.A two-year follow-up study.J Strode Cerebrovasc Dis 2(4)" Elsevier Science Publishers B.V., 240-243 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tsuda Yoshiyasu: "Changes of right-left asymmetry of regional cerebral blood flow with aging in normal subjects." Stroke. 21 (Suppl). I-55 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuda Yoshiyasu: "Changes in right-left asymmetry and sex differences of regional cerebral blood flow with ageing evaluated by Xe-133 inhalation method." Neuroradiology. 33 (Suppl). 263-266 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuda Yoshiyasu: "Cortical blood flow reduction in capsular/putaminal aphasia syndromes shown by ^<123>I-amphetamine single-photon emission tomography." Neuroradiology. 33(Suppl). 621-623 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuda Yoshiyasu: "Persistent cortical blood flow decreases evaluated by I-123 IMP SPECT in patients with capsular/putaminal aphasia syndrome." J Cereb Blood Flow Metab. 11(suppl 2). S34 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuda Yoshiyasu: "Right-left asymmetry and sex differences of rCBF changes with aging evaluated by Xe-133 inhalation method." J Cereb Blood Flow Metab. 9(Suppl 2). S-788 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuda Yoshiyasu: "Semiquantitative regional cerebral blood flow evaluation using ^<123>I-IMP SPECT in a case showing transient ischemic attack caused by putaminal hemorrhage." Acta Neurol Scand. 84(5). 448-451 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsuda Yoshiyasu: "Recovery of cortical blood flow and dementia after ST-MCA bypass in a patient with severe carotid occlusive lesions. A two-year followup study." J Stroke Cerebrovasc Dis. 2(4). 240-243 (1992)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1994-03-24  

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