Objective To explore the effect of FOCUS-PDCA(find,organize,clarify,understand,select,plan,do,check and act)mode on the postoperative nosocomial infection rate of elderly patients with digestive tract tumors.Methods A total of 100 patients admitted in our hospital betwe...MORE Objective To explore the effect of FOCUS-PDCA(find,organize,clarify,understand,select,plan,do,check and act)mode on the postoperative nosocomial infection rate of elderly patients with digestive tract tumors.Methods A total of 100 patients admitted in our hospital between January 2018 and June 2018 were randomly selected...