Pannu Kulwant Kaur, Chadha Snya, Kumar Dinesh
Indian J Otolaryngol Head Neck Surg. 2011 Jul;63(3):208-13. doi: 10.1007/s12070-011-0129-6. Epub 2011 Feb 23.
To evaluate and analyse the hearing loss in tympanic membrane perforation based on size, site and duration of perforation. The material for this study was comprised of 100 patients of either sex and of age 15 years and above selected randomly. Size of tympanic membrane perforation was assessed under microscope using calibrated wire look. Patients were divided into three groups according to size; group I (0-9 mm(2)), Group II (9-30 mm(2)), Group III (≥ 30 mm(2)); according to site into anterior and posterior group; according to involvement of malleus into malleolar and non malleolar and according to duration into Group A (<1 year), Group B (1-5 years), Group C (≥ 5 years). Hearing loss was measured in each case with pure tone audiometry. Data was analysed statistically using paired t-test. Hearing loss increased as the perforation size increased [I vs. II (t - 4.23, p < 0.001), II vs. III (t - 8.19, p < 0.001), I vs. III (t - 11.68, p < 0.001)]. Hearing loss was more in posterior quadrant perforation than anterior quadrant perforation but difference was not significant statistically (t - 1.15, p > 0.05). Hearing loss was more in malleolar perforation (t - 5.74, p < 0.001). Hearing loss increased as the duration of disease increased [A vs. B (t - 2.01, p < 0.043), A vs. C (t - 5.49, p < 0.001), B vs. C (t - 4.14, p < 0.001)].
基于鼓膜穿孔的大小、部位和持续时间评估与分析听力损失情况。本研究材料包括随机选取的100例年龄在15岁及以上的男女患者。在显微镜下使用校准的钢丝窥镜评估鼓膜穿孔大小。患者根据穿孔大小分为三组：I组（0 - 9平方毫米），II组（9 - 30平方毫米），III组（≥30平方毫米）；根据部位分为前组和后组；根据锤骨受累情况分为锤骨型和非锤骨型；根据病程分为A组（<1年），B组（1 - 5年），C组（≥5年）。对每例患者进行纯音听力测定以测量听力损失。使用配对t检验对数据进行统计学分析。听力损失随着穿孔大小增加而增加[I组与II组（t = 4.23，p < 0.001），II组与III组（t = 8.19，p < 0.001），I组与III组（t = 11.68，p < 0.001）]。后象限穿孔的听力损失比前象限穿孔更多，但统计学上差异不显著（t = 1.15，p > 0.05）。锤骨型穿孔的听力损失更多（t = 5.74，p < 0.001）。听力损失随着疾病持续时间增加而增加[A组与B组（t = 2.01，p < 0.043），A组与C组（t = 5.49，p < 0.001），B组与C组（t = 4.14，p < 0.001）]。
