Objective To establ ish the modified model of cervical heterotopic cardiac transplantation in rats for investigation of cardiac chronic rejection. Methods Forty healthy male Wistar rats, aged 10 weeks, weighing 250-300 g, were appl ied as the donor group, and forty healthy male SD rats, aged 10 weeks, weighing 300-350 g, served as the recipient group. The donors’ pulmonary artery was anastomosed to the reci pients’ right external jugular vein by non-suture cuff technique while the donors’ innominate artery was anastomosed to the recipients’ right common carotid artery by suture microvascular anastomosis. All recipients received cyclosporin to prevent acute allograft rejection. Results Forty consecutive successful transplantations were performed. Neither anastomosis leakage nor vessel obstruction occurred. The total operation time was 40-50 minutes. The time of cuff vascular anastomosis was 2-3 minutes and that of microvascular anastomosis was 9-12 minutes. All recipients survived for more than 30 days and all allografts were examined at 30 days after the transplantation. Pathological manifestations of allograft vessels were chronic rejection. Conclusion This modified model of cervical heterotopic cardiac transplantation is simple, practical and highly reproducible and is appl icable for investigation of chronic rejection in various organ transplantation studies.
Objective To improve the Heron’s technique for heterotopic cardiac transplantation in rats by cuff vessel anastomosis in some aspectsand 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.
Objective To summarize the cl inical experience of vascular bypass grafting combined with endovascularaortic repair (EVAR) for aortic dilatation disease. Methods Between January 2008 and August 2011, 12 patients with aorticdilatation disease were treated with vascular bypass grafting combined with EVAR. Of 12 patients, 11 were male and 1 wasfemale, aged 47-81 years (mean, 65.9 years). All cases were diagnosed through computed tomography angiography (CTA),including 1 case of Stanford type A dissection, 5 cases of Stanford type B dissection, 4 cases of aortic arch aneurysm, and 2 casesof abdominal aortic aneurysm. Eight patients received neck artery bypass grafting before EVAR, and 4 patients underwentfemoral artery bypass grafting after EVAR. Results After operation, pulmonary infection occurred in 3 patients, renalinsufficiency in 2 patients, cerebral infarction in 1 case, decreased hemoglobin and platelets in 7 cases, and poor healing of groinwound in 1 case. Eleven patients were followed up 3-42 months, with an average of 18.6 months. In 1 case undergoing EVARof the thoracic and abdominal aorta, EVAR was performed again because new aneurysms formed at 6 months after operation,and the patient achieved good recovery after 3 months. CTA showed reduced false lumen, thrombosis formation, no endoleak,no deformation or displacement of stent, and anastomotic patency of artificial blood vessels in the other patients at 3, 6, and12 months after operation. Conclusion Vascular bypass grafting combined with EVAR can expand the indications forendovascular repair. It not only provides sufficient anchoring area, but also ensures the blood supply to vital organs, simplifiesthe surgical procedure, and reduces the difficulty of endovascular treatment.
目的 总结 14 例原位心脏移植的治疗经验。 方法 回顾性分析 2006 年 1 月至 2015 年 9 月我院行原位心脏移植术终末期心脏病患者的临床资料，其中男 11 例、女 3 例，年龄 22～62（46.7±10.1）岁。4 例使用抗 Tac 单克隆抗体诱导治疗，10 例使用巴利昔单克隆抗体诱导治疗。采用 4℃ 组氨酸-色氨酸-酮戊二酸（HTK）液保护供心。2 例采用经典式原位心脏移植，12 例采用双腔静脉法行心脏移植。术后采用环孢素或他克莫司+吗替麦考酚酯+激素三联抗排斥方案。 结果 术后早期 1 例因多器官功能衰竭合并严重感染死亡。早期并发症有：败血症 1 例，硬膜外血肿 1 例，急性肾功能不全 1 例，移植物右心功能不全 2 例，低心排血量并需要体外膜肺氧合支持 1 例。术后长期随访：截至 2016 年 6 月，2 例失访，1 例于术后 30 个月因自行停服抗排斥药物死于急性排斥，1 例于术后 36 个月死于肺癌。余 9 例存活 9～121 个月，生活质量良好。 结论 心脏移植是治疗终末期心脏病的有效方法，熟练的手术技巧、合理的免疫抑制治疗，围术期管理经验、密切监测和治疗感染和排斥及患者依从性均影响着心脏移植的效果。