| Long-Term Surgical Outcome of Canal-Tympanoplasty in Patients With Schuknecht Type B Congenital Aural Stenosis |
Yoonjae Lee1
, Moo Kyun Park1,2
, Jun Ho Lee1,2
, Sang-Yeon Lee1,2
, Myung-Whan Suh1,2
|
1Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul, Korea
2Sensory Organ Research Institute, Seoul National University Medical Research Center, Seoul, Korea |
| Correspondence |
Myung-Whan Suh ,Tel: +82-2-2072-4845, Fax: +82-2-766-2447, Email: drmung@naver.com
|
|
|
Received: July 22, 2024; Revised: October 28, 2024 Accepted: November 26, 2024. Published online: December 2, 2024. |
|
|
|
| ABSTRACT |
Objectives
. Congenital aural atresia (CAA) is a complex condition that manifests in various forms, including Schuknecht type B stenosis, which is characterized by a congenitally narrow bony external auditory canal (EAC). This study aims to evaluate the long-term surgical outcomes of canal-tympanoplasty in patients with Schuknecht type B CAA.
Methods
. The study included 21 ears diagnosed with Schuknecht type B CAA, all of which underwent canal-tympanoplasty. Reconstruction of the large EAC and tympanic membrane involved conchal flap meatoplasty, bony EAC drilling, ossicular reconstruction, and overlay tympanoplasty. Standard pure-tone audiometry was analyzed at multiple post-surgery time points: 3, 6, 12, and 24–60 months. Additionally, the incidence of postoperative complications was assessed.
Results
. The hearing outcomes of canal-tympanoplasty in this case series were satisfactory. Serviceable hearing was achieved in all patients after 3 months and was maintained in 85% of patients for 1 year. The air-bone gap improved from a preoperative average of 39.3±15.1 dB to 13.7±7.4 dB at 3 months, 16.4±10.5 dB at 6 months, 19.1±11.7 dB at 12 months, and 21.5±16.1 dB at 2–5 years postoperatively. Three patients required revision canal-tympanoplasty due to hearing deterioration, representing 14.3% of the cases. There were no instances of postoperative infection, facial nerve weakness, vertigo, deterioration of bone conduction thresholds, or complete restenosis of the EAC.
Conclusion
. Canal-tympanoplasty proved to be a satisfactory surgical intervention for patients with Schuknecht type B CAA. This procedure led to significant improvements in hearing outcomes, providing serviceable hearing that lasted for several years. Moreover, the risk of postoperative hearing deterioration and/or the need for revision surgery within 1 year was considered acceptable. |
| Keywords:
Tympanoplasty; Hearing; Canal; Patients; Schuknecht; Congenital Aural Atresia |
|
|
|
Download PDF File
Full text via DOI
Download Citation 
