Objective To compare the modeling effect of chronic rejection following orthotopic and heterotopic intestinal transplantation in rats. Methods F344( RT11vr) rats were used as the donors and Lewis( RT11) rats were used as the recipients. Models of allogeneic heterotopic and orthotopic intestinal transplantation in rats( 8 rats in each model)were established,and subcutaneous injection of ciclosporin was given at 0 ~ 14 d after operation. Changes in body weight and survival time of the recipients were observed...