[Effects of preoperative secretions on dry ears after the surgery for chronic suppurative otitis media and cholesteatoma].

To investigate the influences of preoperative secretions of the patients with chronic suppurative otitis media and/or middle ear cholesteatoma on the time to have dry ears after the operations. The study enrolled 228 patients with chronic suppurative otitis media and/or middle ear cholesteatoma who received modified radical mastoidectomies and tympanoplasty. The patients were divided into two groups based on whether there were secreions in the surgical ear before the operations. The time to have dry ears after surgeries were compared between the two groups. The time to have dry-ear postoperatively was significantly different between patients with different preoperative microbial types of surgical ear secretions(<0.05). The dry ear time was(2.24±1.83) months in the secretion-free group, (2.22±1.96) months in the normal bacteria group of oral cavity and skin,(3.00±2.51) months in the single non-resistant bacteria group, (3.82±2.78) months in the fungal group and (6.82±1.83) months in the compound or multi-drug resistant bacteria group. The dry ear time of compound bacteria group or multi-drug resistant bacteria group was significantly longer than that of the other groups(<0.05). The time to have dry ears of the fungus group was longer than that of the non-drug resistant bacteria, the normal oral and skin flora and the secretion free group(<0.05). Chi-square test results showed that there was a significant difference in postoperative dry ear rate among patients with different preoperative secretions classification(<0.05). The presence of secretion and microorganism type in ear before operation is an important influencing factor of postoperative time to have dry ears. Microbiological culture and appropriate medication based on the drug sensitivity tests are beneficial for the postoperative recovery of patients with chronic suppurative otitis media and/or middle ear cholesteatoma.