作者:沈新,李孟彬,王为忠,施海
【关键词】 粘连;壳聚糖;尿囊素;兔
【Abstract】AIM: To investigate the preventive effect of chitosan and allantoin against postsurgical abdominal adhesions and to study the synergetic effects of these two drugs and discuss the mechanism. METHODS: Ninetysix rabbits were chosen to establish intestinal adhesion models, which were randomly and evenly divided into control group (group A),chitosan treatment group (group B), allantoin treatment group (group C) and chitosan+allantoin treatment group (group D). Right after the operation, the situations of rabbits were observed. Then the rabbits were dissected to evaluate the degree of adhesions 1 and 2 weeks after the operation. Study the pathological changes under microscope. RESULTS: The models of adhesions were reliable. The adhesion degrees of group B, C and D were all significantly decreased compared with that of group A (P<0.05). Group D showed a better effect than group B and C (P<0.05). Group B, C and D could alleviate the inflammation reaction and the degree of fibrosis compared with group A. CONCLUSION: Treatment with chitosan and allantoin during operation could prevent postsurgical abdominal adhesions, and the two drugs had a synergetic effect.
【Keywords】 adhesions; chitosan; allantoin; rabbits
【摘要】 目的: 对比观察壳聚糖及尿囊素对术后腹腔粘连的预防作用,并探讨两者合用的协同作用及机理. 方法: 成年纯种家兔96只制成粘连动物模型,随机分为对照组(A)、壳聚糖组(B),尿囊素组(C)和壳聚糖+尿囊素联合用药组(D),每组24只. 观察家兔术后一般情况, 并于术后1 wk和2 wk剖腹观察其腹腔粘连情况,按程度分级,切取标本行HE染色,显微镜下观察. 结果: 粘连动物模型建立切实可靠,B,C组和D组粘连等级与A组比较均有统计学意义(P<0.05),且D组效果明显优于B,C组(P<0.05). 病理观察联合用药组炎性反应及纤维化程度均轻于对照组. 结论: 术中应用壳聚糖和尿囊素均有预防术后腹腔粘连的作用,两者合用可产生协同作用.
【关键词】 粘连;壳聚糖;尿囊素;兔
0引言
术后腹腔粘连是外科腹部手术后的一种常见并发症,发生率高达90%以上[1],是引起肠梗阻最常见的原因,有的甚至可引起肠绞窄而致命. 尽管广大医务工作者已认识到手术操作轻柔、减少出血和异物存留、避免粗糙创面出现、术后加强活动等可以减轻腹腔粘连,但已有的研究报道表明:采用上述办法并不能很有效地预防粘连[2],因而探索能有效预防术后肠粘连的新方法具有重要的临床意义. 壳聚糖是一种纯天然的高分子多糖体,可被人体降解吸收,是新型的高分子抗粘连剂. 尿囊素为2,5二氧代4咪唑烷基脲. 它是尿酸的衍生物,具有促进组织细胞增生、促进溃疡及伤口愈合的作用. 本实验通过对比观察壳聚糖及尿囊素对家兔术后腹腔站粘连的预防作用,以及两者联合应用对预防术后粘连的效果,探讨壳聚糖及尿囊素联合应用对预防术后肠粘连的协同作用,为预防和减轻术后腹腔粘连提供实验依据.
1材料和方法
1.1材料成年纯种家兔96只,雌雄不限,体质量2~2. 5 kg,二级清洁动物,由第四军医大学实验动物中心提供;壳聚糖凝胶,为石家庄亿生堂医用品有限公司产品;尿囊素,为江苏华邦生化科技有限责任公司产品,用生理盐水配制成0.1 mol/L浓度的溶液备用;速眠新Ⅱ注射液,1.5 mL/支,长春军需大学兽医研究所生产.
1.2方法
1.2.1动物准备全部动物术前均禁食(不禁水)12 h,速眠新Ⅱ注射液(2 mL/kg)肌肉注射麻醉. 麻醉后仰卧位固定,剪毛消
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