Graft success
purulence, perforations, UAO, Non-purulent
MIDDLE EAR INFECTION, GRAFT INFECTION
At postoperative 6 months, in the UAO group, residual perforation was seen in 5 patients. Of the 5 patients, 3 patients presented as purulence ear discharge at postoperative 7 days and was subsequently found to have failed, resulting in a residual perforation although none had persistent purulence discharge after ofloxacin ear drops and intravenous antibiotic therapy treatment, while middle ear infection was not found in the remaining 2 patients.In the NAO group, 6 patients presented as purulence ear discharge at postoperative one week, who were subsequently found to have failed, resulting in a residual perforation, although purulence ear discharge was successfully treated with ofloxacin ear drops and intravenous antibiotic therapy treatment. In only one, mild purulence discharge was observed at postoperative 3 days and successfully treated with intravenous antibiotic therapy treatment for one week, the graft subsequently survived and the perforation was successfully closed.Non-purulent exudate of varying degrees was seen in both groups at postoperative 1–4 weeks, except for the perforations with graft infection. The graft success rates were 92.6% (63/68) in the UAO group and 91.0% (61/67) in the NAO group, the difference was not significant (Followup procedure of two techniques. UAO technique. 