Water-infusion technique improved the bowel cleanliness during withdrawing the colonscopy：a randomized controlled study / 中国内镜杂志

Objective To compare the effect of water-infusion colonoscopy and conventional air-infusion colonoscopy on the bowel cleanliness during withdrawing.Methods A single blind randomized controlled trial was conducted. 222 patients were randomly divided into water-infusion group (group A, 112 cases) and air-infusion group (group B, 110 cases). The cleanliness scores, scores improvement, pain scores, time of reaching cecum, depth of colonoscopy, rate of whole colon examination, adenoma detection rate (ADR), operator’s dififculty and complications were compared between the two groups.Results The cleanliness score during withdrawing was higher in group A [M(8)/IQR(1) vs M(8)/IQR(2),P = 0.000], the improvement was higher in group A [(0.53 ± 0.74) vs (0.23 ± 0.55), P = 0.000], the abdominal pain score was signiifcantly lower in group A [M(2)/IQR(1) vs M(4)/IQR(2),P = 0.000] and the ADR was higher in group A (36.61 % vs 23.64 %,P = 0.041). The operator’s dififculty evaluation score was signiifcantly lower in group A [M(1)/IQR(1) vs M(2)/IQR(1),P = 0.005]. There were no signiifcant differences at the time of reaching cecum, the depth of colonoscopy and the whole colon examination rate between the two groups.Conclusion Water-infusion colonoscopy could signiifcantly improve the bowel cleanliness during withdrawing scope, improve the ADR and reduce abdominal pain of patients, without increasing the time to reach cecum.

Experimental animal colonoscopy with different temperatures of water infusion / 中国内镜杂志

Objective To explore the impact on rabbit intestinal mucosa injury and the influence on endoscopic operation with different temperatures of water infusion. Methods 30 common adult male rabbit (weight 1.6~2.5 kg), were randomly divided into three groups with different temperatures of water infusion as follows:A group (35~36℃), B group (37~38 ℃), C group (39~41 ℃), then, perform water infusion colonoscopy, evaluating the operators satisfaction, then we observe the pathological changes of postoperative intestinal mucosal tissue. Results There was no statistically significant difference among the three groups of intestinal mucosa injury ( > 0.05). The vision exposure score of Group C was lowest, compared with the other two groups, which has a statistically significant differences ( < 0.05). Conclusions Warm water infusion colonoscopy is a safe and effective method, and the optimum temperature was about 39~41℃.