腹部手术后肠粘膜屏障障碍及其临床意义

目的 探讨腹部外科术后患者血浆谷氨酰胺(Gln)水平、肠粘膜通透性与细菌移位及细菌移位与全身炎症反应综合征(SIRS)之间的关系.方法 腹部择期手术患者42例,于术前、术后2、7d采集外周血进行血浆Gin浓度和全血细菌DNA检测,同时进行尿中乳果糖/甘露醇(L/M)比值测定,分析肠粘膜屏障障碍与术后SIRS发生情况的关系.结果 血浆Gln浓度与术前比较,术后2、7 d血浆Gln浓度显著降低(P<0.01).与术前比较,术后尿中L/M比值显著增高(P<0.01).这42例手术病人术前PCR结果均为阴性,术后5例变为阳性,其中,术后2d的PCR阳性率为9.5%(4/42),术后7 d的PCR阳性率为2.4%(1/42).术后2 d的PCR阳性患者血浆Gin浓度较阴性患者显著降低(P<0.01).术后2d的PCR阳性患者的L/M比值较阴性患者显著增高(P<0.01).术后42例病人中,26例发生SIRS:SIRS组术后2 d Gln浓度较非SIRS组显著下降(P<0.01),而L/M比值显著增加(P<0.01).术后26例SIRS患者中5例PCR阳性,而16例非SIRS患者的PCR结果均为阴性,两组间PCR阳性率比较无显著性差异(P>0.05).结论 腹部手术后患者血浆Gln水平下降和肠粘膜通透性增高与细菌移位的发生密切相关,肠粘膜屏障障碍可能是术后感染的原因之一.

Intestinal mucosal barrier dysfunction after abdominal operation and its clinical significance

Objective To investigate the plasma glutamine (Gln) level and relationships between the intestinal mucosal permeability and bacterial translocation and between bacterial translocation and systemic inflammatory response syndrome (SIRS) after abdominal operation. Methods The peripheral blood was collected from 42 patients before and 2 and 7 days after elective abdominal operation. The plasma Gln concentration and lactulose/mannitol (L/M) ratio were measured and the whole blood bacterial DNA concentration was ...