磁液双悬浮离心血泵左心辅助的动物实验

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目的:检测左心辅助羊应用磁液双悬浮离心血泵和控制器的各项性能。方法在全麻、非体外循环、心脏跳动下,将血泵流出端人工血管吻合于降主动脉,左心尖植入血泵流入端,建立左心辅助实验模型,记录术前术后血液、生化和血泵的各项指标。共完成11只左心辅助羊的动物实验。结果11只左心辅助羊,心室颤动死亡3例,急性肺水肿死亡1例;左室血栓及左室碎肉至血泵停止工作5例;1例血泵左心辅助59 h,因血泵电流逐渐增高人为停泵,羊存活75 d,死于感染;1例术后应用华法林抗凝,血泵正常工作,辅助流量3.0~3.4 L/min,血液、生化及尿液各项指标基本正常,游离血红蛋白3.3~44.3 mg/L,可携带控制器和锂电池自由行走。因血泵流入管道向左室前壁移位损伤室壁,致心肌组织入泵,血泵停止转动,辅助羊健康存活120 d。分解血泵未见血栓。结论磁液双悬浮血泵和控制器性能良好,辅助满意,各项生理指标基本正常,初步达到了临床前应用水平。
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