[Experimental study of healing process of anastomosis after "tunnel" esophagogastrostomy]

The "Tunnel" esophagogastrostromy has been clinically proven to be effective in reducing the postoperative anastomotic leakage. An experimental study was carried out in 28 dogs to compare the healing process of "Tunnel" esophagogastrostomy (group A) and end-to-side anastomosis (group B), aiming at finding out the mechanism of prevention of anastomotic leakage after "Tunnel" esophagogastrostomy. The results showed that the mucosa of the esophagus and the stomach had fused at the site of the anastomosis on the fifth day in group A and the same processes had completed on the seventh day in group B. The blood supply of "Tunnel" anastomosis is better than that of the conventional end-to-side anastomosis, hence the hastening of the healing process. The protecting barrier formed with the gastric seromuscular in the "Tunnel" anastomosis plays an important role in preventing the occurrence of postoperative anastomostic leakage.