Abstract
A prospective, blinded, placebo-controlled study was performed to determine the minimum effective duration of short-term antibiotic prophylaxis following cesarean section. Cefoxitin was selected as the study drug, and 189 women at high risk for postoperative infectious morbidity were randomly assigned to three cohorts, each receiving intravenous infusions at cord clamping and at 4 and 8 hours postoperatively. The incidence of endometritis in the placebo group was 29.3% versus 9.4% in patients receiving one dose of cefoxitin (2 gm) at cord clamping and 5.0% in patients receiving three doses of cefoxitin (p<0.0001). Cefoxitin prophylaxis significantly reduced the incidence of endometritis in patients with postoperative anemia. There were no serious complications or drug reactions in the treated groups.
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