糖尿病系一组由于胰岛素分泌缺陷及(或)其生物学作用障碍引起的以高血糖为特征的代谢性疾病,它能引起一系列严重的并发症而导致各种脏器,尤其是眼、肾、神经及心血管系统的长期损害、功能不全和衰竭[1]。目前我国糖尿病的患病率和病死率正在呈快速上升趋势,成为继心脑血管疾病? Diabetes mellitus is a group of metabolic diseases characterized by hyperglycemia caused by defects in insulin secretion and / or their biological dysfunction. Diabetes mellitus can cause a series of serious complications resulting in various organs, especially the eye and kidney , Long-term neurological and cardiovascular damage, dysfunction and failure [1]. At present, the prevalence and mortality of diabetes mellitus in China is showing a rapid upward trend, becoming a cardio-cerebral vascular disease?