RESUMO
Objective To research a new type of gastrointestinal anastomat -- anastomosis device with three rows of staples (Pa-tent No .2012200583213) ,and clarify its associated functions through esophagogastric anastomosis operations on pigs ,so that we could provide experiences for its clinical application in future .Methods Compared with domestic anastomat with two rows of sta-ples ,we designed and manufactured a new type of anastomat with three rows of staples and researched its function .Choosing 12 do-mestic pigs ,about 60 kg ,gastroesophageal anastomosis was taken twice with each case by anastomat with three or two rows of sta -ples randomly in sequence .According to the different types of anastomats ,cases were divided into two groups :group A ,used anas-tomat with three rows of staples ,including 12 cases of anastomosis ;group B ,used anastomat with two rows of staples ,including an-other 12 cases of anastomosis .Results Compared with group B ,cases of group A have less bleeding sites (t = 7 .00 ,P < 0 .01) . Without reinforcement and with 0 .5 kg of tension ,fewer of outermost staples exposed(t= 6 .17 ,P< 0 .01) .And the shape of used staples of group A is double circles ,which has bigger mechanical strength than that of group B (t= 6 .57 ,P < 0 .01) .Conclusion The function of anastomat with three rows of staples surpasses that of traditional anastomat with two rows of staples in pig esopha -gogastrostomy surgery .