腹膜透析相关性腹膜炎兔模型的建立

Establishment of rabbit model for peritoneal dialysis related peritonits

目的 :研制符合临床特征腹膜透析腹膜炎的兔模型。方法 :新西兰兔 1 2只随机分为腹膜炎组和对照组 ,分别于腹腔内注入标准活金黄色葡萄球菌 3× 1 0 9cfu(腹膜炎组 )或生理盐水 1ml(对照组 ) ;48h后 ,在急性尿毒症模型下行腹膜透析 6h ,观察不同时点腹透液 (D)内葡萄糖浓度变化及肌酐 (Cr)、总蛋白 (TP)、白蛋白 (Alb)、免疫球蛋白G(IgG)浓度与血清中浓度 (P)比值 (D/P)以及白细胞数的变化和水的超滤。结果 :腹膜炎组葡萄糖D/DO 低于对照组(P <0 .0 1 ) ;D/Pcr,D/PTP,D/PAl,D/PIgG及白细胞数均明显大于对照组 (均P <0 .0 5 ) ;引流量少于对照组 (P >0 .0 5 )。结论 :通过兔腹腔内给予标准活金黄色葡萄球菌研制出的腹膜透析腹膜炎模型 ,具有小分子溶质转运增加 ,大分子蛋白转运增加 ,超滤量减少和腹透液内白细胞数增多等特点 ,与腹膜透析并发腹膜炎患者临床特征基本一致 。

Objective To establish a rabbit model corresponding with clinical characteristics of peritoneal dialysis related peritonitis.Methods Twelve New Zealand rabbits were randomly divided into peritonitis group and control group. They were infused standard living Staphylococcus aureus 3×10 9 colony forming unit (cfu) (peritonitis group) or 0.9% NaCl 1 ml (control group). After 48 hours, Laboratory rabbits in acute uremic model underwent regular dialysis for 6 hours. At different points of time, the concentration of glucose in dialysate and the dialysate/plasma (D/P) ratio of the concentration creatinine (Cr), total protein(TP), album(Alb) and IgG, the counts of leukocyte in dialysate and water ultrafiltrate were determined. Results D/D 0 were significantly lower in the peritonitis group than that in the control group (P<0.05). The counts of leukocyte and D/P ratio of Cr, TP, Alb and IgG were significantly increased in the peritonitis group (all P<0.05). The drained volume was lower in the peritonitis group than that in the control group (but P>0.05). Conclusion In the rabbit model infused intraperoneally staphylococcus aureus, (1) transport peritoneum of low and large molecular weight solutes is increased, (2) the volume of ultrafiltrate is decreased, (3) the counts of leukocyte in dialysate is increased. These change in this model is basic all correspond with the clinical feature of patients of peritoneal dialysis related peritonitis. So this rabbit model of peritoneal dialysis related peritonitis is a successful experimental infection model.