ABSTRACT
Background: The diagnosis of lesions of ossicular chain plays a vital role in ear surgery, especially surgery for hearing rehabilitation.Objective: The purpose of this study was to assess the value of the virtual CT of the temporal bone in the diagnosis of lesions of the ossicular chain. Subject and Method: A prospective study was carried out in the National ETN Hospital. 117 patients between 15 and 54 years of age with suspected ossicular chain lesions underwent CT of the temporal bone before surgery. Result: Using CT of the temporal bone identified 90 patients (76.92%) with ossicular chain lesions, 27 patients (23.08%) without ossicular chain lesions. The positive diagnosed value of CT of the temporal bone was rather high with p=0.87. The negative diagnosed value of CT was p=0.76.The rate of false diagnosis was 0.24. Conclusion: CT of the temporal bone proved to be effective for diagnosing ossicular erosion. This study demonstrates the value of virtual CT of the temporal bone in the diagnosis of the ossicular chain with p-value = 0.84.
ABSTRACT
Background: In Viet Nam, chronic otitis media is a relatively common disease, accounting for 2-4% of the population. The most common sequalae of chronic otitis media is hearing deficiency. One of the most severe hearing deficiency causes of chronic otitis media is ossicular damages. In developed countries, the partial ossicular reconstruction prosthesis by various materials is relatively common.The partial ossicular reconstruction prosthesis is still limited in Viet Nam.Objectives: To assess the results of hearing improvement after the surgery of partial ossicular reconstruction prothesis and compare the effects of bioceramic and autograft bone. Subjects and method: A study was performed on 135 patients with chronic otitis media who were submitted to partial ossicular reconstruction prostheses with bioceramic and autograft bone at the National Ear Nose Throat Hospital. This was a prospective study. Results: PTA was 54.5 +/- 12.6 dB for four frequencies (0.5, 1, 2, and 3 kHz) in pre-operation, compared to 33.8 +/- 12.8 dB at 6 months after the operation. The ABG improvements for four frequencies and PTA with bioceramic and autograft bone were 18.28 +/- 11.85 dB, 17.99 +/- 10.42 dB, and 18.46 +/- 12.26 dB, 18.81 +/- 11.56 dB, respectively. Conclusions: The hearing levels and ABG were better in post-operation than those in pre-operation. The improvements of hearing levels after the ossiculoplasty using bioceramics was similar to those using autograft bone.