玻璃酸钠预防移植静脉术后粘连的实验研究

Topical application of sodium hyaluronate for preventing perivascular adhesion of the vein grafts in rabbits: An experimental study

目的探讨局部应用玻璃酸钠对移植静脉术后粘连的影响。方法健康雄性5月龄新西兰大白兔36只,随机分为A组(透明质酸钠组)、B组(手术对照组),每组18只。切取右侧颈外静脉3cm,游离左侧颈总动脉,中间切除长约1cm,建立动脉缺损模型,将切取静脉倒置后移植于动脉缺损处,吻合结束后A组用透明质酸钠凝胶0.2ml涂布于移植静脉外膜及两个吻合口,B组应用生理盐水作对照。于术后1、2、4周行移植静脉取材,切取前行大体观察,切取移植静脉后行HE染色、Masson染色观察移植静脉周围粘连和管壁组织学变化,并对术后2、4周的移植静脉粘连行大体观察分级和组织学分级。结果术后1、2、4周大体观察及组织学观察A组粘连程度均低于B组,术后2、4周A组移植静脉大体粘连分级和组织学分级均低于B组,差异有统计学意义(P<0.05)。结论局部应用透明质酸钠可有效抑制移植静脉术后粘连。

Objective To explore the effect of topical application of sodium hyaluronate on preventing perivascular adhesion of the vein grafts in rabbits. Methods Thirty-six male New Zealand white rabbits, aged 5 months, were randomly and equally divided into 2 groups： groups A and B. Arterial defect model was established by cutting about lcm artery from the middle part of the dissected left common carotid artery. A section about 3cm was cut from the right external jugular vein, and the harvested vein was inverted and anastomosed end-to-end to the artery defect. After the anastomosis, the adventitia and two anastomoses of the grafted veins in group A were coated locally with 0.2ml sodium hyaluronate. The grafted veins were obtained 1~ 2 and 4 weeks after the operation, with the perivascular adhesion of the vein grafts being examined macroscopically before the resection. HE staining and Masson staining were preformed for histological changes of grafted vein wall and the p erivascular adhesion of the vein grafts. At 2, 4 weeks postoperation, the perivascular adhesions of the vein grafts were graded by the grading criteria of adhesion in macroscopic evaluation and histological evaluation. Result At 1, 2 and 4 weeks postoperatively, the macroscopic and histological observation found that the perivascular adhesions in group A were looser than those in group B. The macroscopic grade and histological grade were lower in group A than in group B, there was a significant difference between the two groups at 2 and 4 weeks postoperation （P〈0.05）. Conclusion Topical application of sodium hyaluronate can reduce the perivascular adhesion and is an ideal treatment strategy for preventing perivascular adhesion of vein grafts.