建立小型猪可控型心脏死亡模型

Establishment of a miniature porcine model for controlled cardiac deceased donor

目的 建立一种小型猪可控型心脏死亡供者模型.方法 采用2～4个月龄的五指山小型猪.静脉及呼吸全身麻醉后,开胸手术制作心肌梗死模型,使供猪出现心脏骤停,同时中断呼吸机及药物支持,由此制备可控型心脏死亡模型.在心脏停搏前后监测循环衰竭前血流动力学、血液气体分析及死亡时间等.经腹主动脉插管,在心脏停搏时间分别为0、15和30 min时进行灌注,并获取各不同时间灌注组供猪的肝脏和肾脏,采用HE染色观察肝、肾组织的病理改变.结果 结扎冠状动脉及停止呼吸机后（7＆#177;0.17）min时各组供猪的心脏完全停搏,期间供猪的心率、收缩压、舒张压、中心静脉压、血氧饱和度和二氧化碳分压均发生明显变化;与0 min灌注组相比,15min灌注组供猪肝、肾组织的缺血再灌注损伤明显加重,30 min灌注组供猪的肝、肾组织缺血再灌注损伤进一步加重.结论 小型猪可控型心脏死亡模型具有呼吸循环衰竭时间稳定、可控制、无药物不良反应等优点,造成的器官缺血再灌注损伤的重复性较好.

Objective To establish a type of porcine model for controlled Cardiac Deceased Donor.Method Using the wuzhishan miniature pig 2 ～ 4 months of age.After intravenous general anesthesia and respiratory,after open heart surgery to produce myocardial infarction model,to heartbeat stop completely,stop breathing machine and drug support,so we established a miniature pig cardiac death donor model.Record during the heart rate,systolic pressure,diastolic blood pressure,central venous blood pressure,blood oxygen saturation and regularly take on blood gas analysis.Before cardiac arrest,monitoring hemodynamic,blood gas analysis,and the time of death before the circulatory failure.After cardiac arrest respectively 0 min,15 min and 30 min,perfusion for donor organs （liver/kidney）,get the pig＆#39;s liver/kidney in the different time of the groups,observed the pathological changes of liver/kidney tissues by HE staining.Result The heartbeat stop completely occurs 7 ＆#177; 0.17 minutes after left descending coronary artery ligation and cease of assisted respiration in the different groups,systolic pressure,diastolic blood pressure,central venous pressure,blood oxygen saturation,CO2 partial pressure changed significantly;Immediately after cardiac arrest for compared group （0 min）,schemia-reperfusion that group of 15 min after cardiac arrest injury is obvious,ischemia-reperfusion that group of 30 min after cardiac arrest injury is further.Conclusion Miniature pig donor model obtained in this method respiratory cycle failure stability,can be controlled,no adverse drug reactions,the organ ischemia-reperfusion injury caused by repetitive is better.