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Monitoring cerebral ischemia during carotid endarterectomy and stenting

The Journal of Biomedical Research 2017年第1期31卷 11-16页

作者： Jian Li ahmed shalabi Fuhai Ji Lingzhong Meng Department of Anesthesiology The First Affiliated Hospital of Soochow University Department of Anesthesia and Perioperative Care University of California San Francisco

Current therapy for carotid stenosis mainly includes carotid endarterectomy and endovascular stenting,which may incur procedure-related cerebral *** methods have been employed for monitoring cerebral ischemia during surgery,such as awake neurocognitive assessment,electroencephalography,evoked potentials,transcranial Doppler,carotid stump pressure,and near infrared ***,there is no consensus on the gold standard or the method that is superior to others at *** patient awake for real time neurocognitive assessment is effective and essential;however,not every surgeon adopts *** patients under general anesthesia,cerebral ischemia monitoring has to rely on non-awake *** advantageous and disadvantageous properties of each monitoring method are reviewed.

关键词： cerebral ischemia monitoring carotid endarterectomy carotid artery stenting

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Investigation on the mechanical properties of sintered porous copper compacts

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China Particuology 2007年第6期5卷 391-394页

作者： Yasser M.Z. ahmed Mohamed I. Riad ahmed I. Zaky Mohammed Abdel-Aziz Mohamed M.H. shalabi Central Metallurgical Research and Development Institute CMRDI El-Felzat Street El-Tabbin P.O. Box 87 Helwan Cairo Egypt

In line with recent attention on porous metals having low and medium porosities in the range of 20-50%, this paper studies the effect of porosity on the mechanical properties of sintered copper compacts. Experiments were designed to investigate the effect of porosity, applied stress and sliding velocity on the wear rate of copper compacts, leading to the finding that the effects of both porosity and applied stress of the wear test on the wear rate are approximately similar and higher than that of sliding velocity. The investigation concerning the effect of porosity on compressive strength indicated that the stress-strain curve of high-porosity compact exhibited identifiable ultimate strength points, though low-porosity compact showed distinct stages of elastic plastic behavior.

关键词： Porous copper Wear rate Compressive strength Experimental design technique

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