OBJECTIVE To explore the security of non-preventive application of antibiotics during perioperative period of thyroid clean surgery,so as to provide evidence for clinical treatment.METHODS A total of 1024 cases of thyroid clean surgical patients in our hospital were selected for the study,and divided into observation group(784cases)and control group(240cases)according to whether used antibiotics during perioperative period.The clinical indexes of the two groups were observed and compared.RESULTS The differe...