Objective To study the occurrence mechanism and the clinical practice feasibility of cases of cavum tympani natural shaping after partial radical mastoidectomy. Methods A total of 18 radical mastoidectomy cases between June, 1996 and June, 2006 were analyzed, and the relationship between pathological characteristics, operation-performing features as well as dressing change after the operation and the phenomenon of tympanic membrane regeneration and healing were studied. Results In 21 out of 46 cases, tympanic membrane was regenerated and healed after the operation, among which hearing recovered completely in 2 cases, noticeably improved in 6 cases, partly improved in 11 cases and not improved at all in 2 cases. Conclusion Attention paid to the protection of remnant tympanic membrane and middle ear biography tone structure in radical mastoidectomy, together with rational use of medication after the operation, can generally contribute to the natural regeneration and healing of the cavum tympani and obvious improvement of hearing.
【摘要】 目的 探讨乳突根治术后耳内窥镜换药与常规换药相比是否具有优势。 方法 2003年3月-2008年10月对89例共89只耳行开放式乳突根治术患者按随机数字表法随机分为试验组及对照组，试验组45例45只耳采用耳内窥镜换药，对照组44例44只耳常规换药；分别观察试验组和对照组的干耳人数及干耳的时间，计算干耳率及干耳的平均时间。 结果 试验组45只耳中42只干耳，干耳率93.3％；对照组44只耳中40只干耳，干耳率90.9％。两组比较差异无统计学意义（Pgt;0.05）。试验组42例干耳患者平均干耳时间为术后（50.8±13.4） d，对照组40例干耳患者平均干耳时间为术后（60.7±12.2） d；两组比较，差异有统计学意义（Plt;0.001）。 结论 中耳乳突根治术后耳内窥镜下换药与常规换药相比不能显著提高干耳率，但能有效缩短干耳时间。【Abstract】 Objective To evaluate the application of otoendoscope in dressing change after mastoidectomy. Method Between March 2003 and October 2008, 89 patients (89 ears) underwent mastoidectomy in Department of Otolaryngology Head and Neck Surgery, West China Hospital of Sichuan University and in Department of Otolaryngology, Nuclear Industry 416 Hospital of Chengdu. The patients were randomly divided into two groups by simple randomization (trial group and control group). Forty-five patients in the trial group underwent the dressing change under otoendoscope, while 44 patients in the control group under the routine method. The ear drying rate and the ear drying time in the two groups were observed. Results The ear drying rate was 93.3% (42 dry ears)in the trial group, and was 90.9% (40 dry ears) in the control group; the difference between the two groups was not significant (Pgt;0.01). The ear drying time was (50.8±13.4) days in the trial group and was (60.7±12.2) days in the control groups; the difference between the two groups was significant (Plt;0.001). Conclusion Dressing change under the otoendoscope after mastoidectomy may not improve the ear drying rate but can shorten the ear drying time.