Treatment of Aneurysms Arising from the Terminal Portion of the Basilar Artery

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  • YAMAURA Akira
    Department of Neurological Surgery, School of Medicine, Chiba University
  • ISE Hiroshi
    Department of Neurological Surgery, School of Medicine, Chiba University
  • MAKINO Hiroyasu
    Department of Neurological Surgery, School of Medicine, Chiba University

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タイトル別名
  • —With Special Reference to the Radiometric Study and Accessibility of Trans-Sylvian Approach—

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説明

Twenty eight basilar-superior cerebellar aneurysms (BA-SCA) and 31 basilar bifurcation aneurysms (BA-BIF) in 57 patients were analysed in a radiometric study to determine the usefulness of the transsylvian approach. The line between the anterior clinoid process and the posterior clinoid process was adequate as a base line for measurement of aneurysmal location. The height of internal carotid bifurcation (ICAh) defined the entrance of the trans-sylvian approach. Postoperative complications such as oculomotor palsy or hemiparesis were less frequent when the ICAh was higher than 10 mm in both BA-SCA and BA-BIF. The height of the aneurysm (ANh) was another important factor which determined the difficulty of operation. Neurological deficits were less common when ANh was between 5 mm and 10 mm above the baseline. Simple radiometry offers an important clue as to the difficulty of operation.<BR> Results of surgery was quite satisfactory and there was only one death in each (16 BA-SCA and 18 BA-BIF) that were treated by the trans-sylvian approach.

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