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  • Title: Erythromycin induces pyloric relaxation accompanied by a contraction of the gastric body after pylorus-preserving gastrectomy.
    Author: Nakabayashi T, Mochiki E, Kamiyama Y, Haga N, Asao T, Kuwano H.
    Journal: Surgery; 2003 Jun; 133(6):647-55. PubMed ID: 12796733.
    Abstract:
    BACKGROUND: Pylorus-preserving gastrectomy (PPG) is a function-preserving surgery; however, long-term retention of food in the residual stomach is a frequent complication during the early postoperative period. We reported that gastric stasis after PPG was attributable to the delayed recovery of gastric phase III, in which pyloric relaxation accompanied a contraction of the gastric body. The objective of the present study is to determine whether erythromycin can induce phase III with pyloric relaxation after PPG. METHODS: We studied gastrointestinal motility in dogs after PPG by using strain gauge force transducer. After randomized administration of either erythromycin or saline, interdigestive gastropyloroduodenal motility was recorded. RESULTS: Erythromycin induced phase III with pyloric relaxation in the early postoperative period. Pyloric relaxation accompanied a contraction of the gastric body. Compared with the saline group (body: 87.2 +/- 16.7 mmHg x min, antrum: 69.7 +/- 13.7 mmHg x min, pylorus: 91.7 +/- 22.1 mmHg x min), the erythromycin group showed significantly increased gastropyloric motility indexes (body: 506.2 +/- 33.5 mmHg x min, antrum: 430.9 +/- 53.7 mmHg x min, pylorus: 589.5 +/- 59.5 mmHg x min). CONCLUSIONS: Erythromycin can induce phase III, in which pyloric relaxation accompanied a contraction of the gastric body in the early postoperative period after PPG. Erythromycin might be used as a prokinetic agent for the treatment of early gastric stasis after PPG.
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