68. 電磁血流計の脳動脈瘤手術中頭蓋内脳動脈血流測定への応用

概要

論文の詳細を見る
Specially designed probes were made and an electromagnetic flow meter with autozero balance system was used to facilitate the measurements of intracranial main cerebral arterial blood flow during aneurysm surgery. Blood flow could be measured at the internal carotid artery (ICA), M1 portion of the middle cerebral artery (MCA) and A1 portion of the anterior cerebral artery (ACA). The effects of brain retraction and induced hypotension on cerebral arterial blood flow were also investigated. The mean arterial blood flow in ICA, M, and A, were 144 ml/min, 81 ml/min and 52 ml/min, respectively. Test occlusion of ICA, MCA and ACA demonstrated the collateral capacity in each patient. Induced hypotension showed that a lower arterial blood pressure of autoregulatory response was 58 mmHg in normotensive patients. Brain retraction, ranging from 150 to 300 mm H2O (average 250 mm H2O), decreased blood flow approximately 20 percent of the control value. It was suggested that our specially designed probes and electromagnetic flow meter were useful to investigate the cerebral circulation and gave important clues to manage the main cerebral arteries and protect the ischemic insults of the brain during aneurysm surgery.
The Japanese Society on Surgery for Cerebral Strokeの論文