改良Heron法建立异种异位心脏移植模型

目的对Heron法颈部袖套血管吻合建立心脏移植模型的手术方法进行部分改进,建立简化的豚鼠→SD大鼠异种异位心脏移植模型。方法异种心脏移植供体为雄性豚鼠64只,普通级,体重250～350g;受体为雄性SD大鼠64只,清洁级,体重300～350g。采用改进的套管技术通过自制Cuff管将豚鼠供心的升主动脉、肺动脉与SD大鼠受体的右侧颈总动脉、颈外静脉分别进行吻合。结果单人操作连续进行正式试验64次,总手术时间45～60min,吻合时间2～5min,供心冷缺血平均14±3min。手术成功率100%,无吻合口漏血或血管回流受阻,移植物复跳率100%。结论改良Heron法建立大鼠颈部异种心脏移植无需显微外科操作,是一种简便、经济实用、稳定可靠和易于复制的器官移植研究动物模型。

MODIFICATION OF HERON'S TECHNIQUE FOR CERVICAL HETEROTOPIC CARDIAC XENOTRANSPLANTATION

Objective To improve the Heron's technique for heterotopic cardiac transplantation in rats by cuff vessel anastomosis in some aspects and successfully establish the simplified model of cervical cardiac xenotransplantation from guinea pigs donor to SD rats recipients. Methods The donors were 64 male guinea pigs, whose weight ranged from 250 to (350 g;) the recipients were 64 male SD rats, whose weight ranged from 300 to (350 g.) The guinea pigs donor's ascending aorta and pulmonary artery were anastomosed to SD rats recipient's right common carotid artery and external jugular vein respectively with a self-made "sleeve" anastomosis. The modified cuff technique of heterotopic grafting is described in detail. Results 64 consecutive successful transplantations have been performed by single surgeon were done with negligible operative risk. No anastomosis leakage nor vessel obstruction. The total time of surgical procedure were 45 to 60 minutes. The new technique allowed vascular anastomoses to be completed in 2 to 5 minutes. The total cold ischemia time for donor heart was 14 minutes in average. Conclusion This modified Heron's technique was a simple, economical, practicable, reliable and high reproducible model can be operated by surgeons with minimal training in microvascular surgery, and be applied to various transplantation immunological studies.