This is a randomized controlled trial designed to test an intervention (Remote ischemic
preconditioning) in patients undergoing carotid endarterectomy (CEA).Remote ischemic
preconditioning(RIPC) with transient upper limb ischemia/reperfusion is a novel, simple,
cost-free,non-pharmacological and non-invasive strategy.The purpose of this study is to
evaluate the effects of Remote Ischaemic Preconditioning on perioperative ischaemic injury in
patients undergoing carotid endarterectomy compared to control intervention.The outcomes of
interest include neurocognitive function,clinical outcomes,and biomarkers of brain injury.