Group B ( 98 patients) had 1 superficial surgical site infection, 1 postoperative pneumonia and 2 low urinary tract infection with a 1% wound infection rate and an overall infection rate of 4.1%; 术前用抗生素组98例,术后切口表浅感染1例(1%)、肺感染1例(1%)和下尿道感染2例(2%),总的术后感染率为4.1%;