A STUDY OF TYPE-I TYMPANOPLASTY BY UNDERLAY TECHNIQUE-RISK FACTORS AND THEIR EFFECT ON OUTCOME

Lt. Col. Dr. Salah Uddin Ahmmed*, Mejbah Uddin Ahmed, Col. A. K. M Asaduzzaman, Col. Md. Tauhidul Islam, Lt. Col. Md. Bashir Ahmed, Lt. Col. Md. Iftekharul Alam and Lt. Col. Md. Misbah Al Kabir

ABSTRACT

Background: Type 1 Tympanoplasty is a common and established surgical procedure involving reconstruction of the tympanic membrane defect along with elimination of disease, if any, from the middle ear. It is very safe and effective procedure with a variation in the outcome. The success rate varies in different setups and there are some confounding factors like; the size, type and location of perforation which affect the result. The purpose of this study was to determine risk factors and to assess their effect on the success rate. Methods: This study was conducted at Combined Military Hospital, Rangpur and Border Guard Hospital, Dhaka from June 2018 to June 2020. All the patients who presented with dry ears, no nasal disease and persistent tympanic membrane perforations during this period were operated upon and overall success rate was calculated. In addition, the relationship between the site of perforation, size of perforation and the type of perforation and the success rate of Type-I Tympanoplasty was also calculated. Results: A total of 132 patients were included in this study. Out of these 121 (91.66%) showed complete healing after surgery. The success rate was highest 95.34% in central perforation and lowest 85.71% of the cases in anterior perforation. 100% of the small perforation healed completely while only 74.07% of the large perforations showed successful result after surgery. Conclusion: Tympanoplasty is an effective procedure that can lead to improvement in hearing function in patients and prevention of recurrent ear discharge. Optimal results can be achieved through use of the appropriate surgical technique.

Keywords: Type-I Tympanoplasty; Size of perforation; Site of perforation; Outcome percentages.