摘要
AIM:To assess the efficacy of N-acetylcysteine(NAC) and activated Dimethicone in improving endoscopic mucosal visibility.METHODS:A total of 148 patients were randomly allocated into four groups to receive one of the following premedications:group A:100 mL water alone;group B:activated Dimethicone plus water(up to 100 mL);group C:NAC plus water(up to 100 mL);and group D:activated Dimethicone and NAC plus water(up to 100 mL).A single endoscopist blinded to the patients group assessed the gastric mucosal visibility scores(range 1-4) at four sites.The sum of the scores from the four sites was considered as the total mucosal visibility score(TMVS).RESULTS:The patients in group B showed a significantly lower TMVS than those of groups A and C(P < 0.001).The TMVS in patients of group D was significantly lower than that of groups A and C(P < 0.001).The TMVS did not significantly differ between groups B and D(P > 0.05).The difference between TMVS of groups C and A was not significant(P > 0.05).CONCLUSION:Premedication with activated Dimethicone 20 min prior to the upper endoscopy leads to the best visibility.NAC does not improve visualization by itself.
AIM：To assess the efficacy of N-acetylcysteine（NAC） and activated Dimethicone in improving endoscopic mucosal visibility.METHODS：A total of 148 patients were randomly allocated into four groups to receive one of the following premedications：group A：100 mL water alone;group B：activated Dimethicone plus water（up to 100 mL）;group C：NAC plus water（up to 100 mL）;and group D：activated Dimethicone and NAC plus water（up to 100 mL）.A single endoscopist blinded to the patients group assessed the gastric mucosal visibility scores（range 1-4） at four sites.The sum of the scores from the four sites was considered as the total mucosal visibility score（TMVS）.RESULTS：The patients in group B showed a significantly lower TMVS than those of groups A and C（P〈0.001）.The TMVS in patients of group D was significantly lower than that of groups A and C（P〈0.001）.The TMVS did not significantly differ between groups B and D（P〉0.05）.The difference between TMVS of groups C and A was not significant（P〉0.05）.CONCLUSION：Premedication with activated Dimethicone 20 min prior to the upper endoscopy leads to the best visibility.NAC does not improve visualization by itself.
