特高压隔离开关分合闸位置多源超高精度监测技术研究

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Preliminary characterization of acute aortic dissection in the mainland of China

Objective To explore the differences in the characteristics of acute aortic dissection （AAD） among less and more economically developed countries with various cultures and races. Data sources Reports from the International Registry of Acute Aortic Dissection （IRAD） and the mainland of China （MC） were collected by searching the PubMed Database and the Chinese Journal Full-text Database from January 2000 to March 2009. Study selection Those reports from IRAD and MC containing larger numbers of cases and complete patients＇ information were selected, which focused on concrete issues of diagnosing or managing AAD were excluded if they were not able to reflect the overall characteristics of this condition. And the data from the article containing the largest number oatients reDorted bv the same medical center in MC were taken into statistics.

猪体外循环下房间隔缺损模型的建立及补片修补

目的探讨高成功率猪体外循环下房间隔缺损模型的建立及补片修补的方法。方法选用20只中华小型猪,雌雄不拘,12~13月龄,体质量45.3~55.7 kg,其中4只用于献血,16只用于造模。全麻气管插管,经右侧第四肋间进胸,导丝引导法行升主动脉插管,心包外法行上下腔静脉插管,建立体外循环,升主动脉不阻断,上下腔静脉阻断,并行循环下打开右房,于卵圆孔处预置缝线弯钳扩张法行房间隔造孔、实验补片植入。结果全组猪死亡1只,原因为右心耳结扎牵引暴露时根部意外撕裂出血,余15只顺利完成手术,均成功植入实验补片。1只猪术后低血压,平均压低至38 mmHg(1 mmHg=0.133 kPa),经使用升压药及补充容量缓解;1只猪术中心脏停搏,经心脏按摩后恢复。15只猪饲养6月,均成活。结论选用猪作为合适的实验动物,使用成熟规范的手术方法,能保证高成功率地建立实验模型,并成功进行补片修补。