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BRAIN BLOOD FLOW STUDIES WITH SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY IN PATIENTS WITH PLATEAU WAVES Minoru Hayashi 1 , Hidenori Kobayashi , Hirokazu Kawano , Yuji Handa , Yoshiyuki Noguchi , Naoki Shirasaki , Satoshi Hirose 1Department of Neurosurgery, Fukui Medical School pp.685-691
Published Date 1986/7/1
DOI https://doi.org/10.11477/mf.1406205744

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  • Abstract
  • Look Inside

The authors studied brain blood flow with single photon emission computed tomography (SPECT) in two patients with plateau waves. The intracra-nial pressure and blood pressure were also monitored continuously in these patients. They included one patient with brain-tumor (rt. sphenoid ridge meningioma) and another with hydrocephalus after subarachnoid hemorrhage due to rupture of It. internal carotid aneurysm. The intracranial pressure was monitored through an indwelling ventricular catheter attached to a pressure transducer. The blood pressure was recorded through an intraarterial catheter placed in the dorsalis pedis artery. Brain blood flow was studied with Headtome SET-011 (manufac-tured by Shimazu Co., Ltd.). For this flow measure-ment study, an intravenous injection of Xenon-133 of about 30mCi was given via an antecubital vein.

The position of the slice for the SPECT was se ected so as to obtain information not only from the cerebral hemisphere but also from the brain stem: a cross section 25° over the orbito-meatal line, passing through the inferior aspect of the frontal horn, the basal ganglia, the lower recessus of the third ventricle and the brain stem.

The results indicated that, in the cerebral hemi-sphere, plateau waves were accompanied by a decrease in blood flow, whereas, in the brain stem, the blood flow showed little change during plateau waves as compared with the interval phase bet-ween two plateau waves. These observations may explain why there is no rise in the blood pressure and why patients are often alert during plateau waves.


Copyright © 1986, Igaku-Shoin Ltd. All rights reserved.

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

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