Objective To investigate the application value of PTX3 in diagnosis and evaluation of sepsis severity and cardiovascular impairment in children. Methods A total of 72 children patients who were admitted and treated in our hospital from February 2015 to February 2017 were divided into three groups according to the degree of infection: non sepsis group( n = 32),sepsis group( n = 28) and severe sepsis group( n = 12). According to the PTX3 concentration,these patients redivided in to mildly increase group( n = ...