Đánh giá kết quả liền màng tai bằng kích thích rìa lỗ thủng với acid trichloracetic tại Bệnh viện Trung ương Quân đội 108

Abstract

Objective: To evaluate the effectiveness of tympanic membrane closure by 33% trichloroacetic acid (TCA) cauterization of the perforation margins, and to assess improvements in symptoms and hearing. Subject and method: This is a case-series descriptive study with pre- and post-intervention comparison conducted on 44 patients who underwent cauterization of margins of perforation by 33% TCA. The study was carried out at 108 Military Central Hospital from January 2023 to December 2024. Result: Left-sided perforations were more prevalent than right-sided ones (24/44, 54.6%). Perforations smaller than 2mm had the highest closure rate (33/44, 75%). Subjective symptoms improved significantly, with tinnitus prevalence decreasing from 86.4% to 13.6% after membrane closure. The most common underlying cause was otitis media (37/44, 84%). Perforations were most commonly located in the anteroinferior (20/44, 45.5%) and posteroinferior quadrants (16/44, 36.4%). The average improvement in pure tone hearing thresholds after closure of perforation was 7.65dB. In 68.3% of patients, the air-bone gap was reduced to less than 10dB, indicating a good hearing recovery. The overall tympanic membrane closure rate was 93.2% after an average of 1.85 TCA cauterizations (maximum of 7). Conclusion: Cauterization of the perforation margins with 33% trichloroacetic acid yields favorable outcomes, including symptom relief, high tympanic membrane closure rates, and improved hearing.