Objective To investigate the changes of preoperative renal function and its influencing factor in Stanford type A aortic dissection(AD).Methods A total of 157 patients with Stanford type A AD(AD group)were divided into 3subgroups based on disease course,acute stage group(n=91),subacute stage group(n=41)and chronic stage group(n=25).Another 95 healthy volunteers were as controls(control group).The levels of blood urea nitrogen(BUN),serum creatinine(SCr)and uric acid(UA)were detected and compared among groups...