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[Indications and surgical treatment of large middle ear abnormality]
H Hildmann1, A Rauchfuss, A Hildmann
1Univ.-HNO-Klinik, Bochum.
Insights
Early hearing assessment and bone conduction hearing aids are crucial for children with external auditory canal atresia to ensure normal speech development. Surgical intervention between ages 5-6 uses high-resolution computed tomography for precise diagnosis and planning.
Area of Science:
- Otolaryngology
- Pediatric Audiology
- Medical Imaging
Context:
- External auditory canal atresia presents significant challenges for hearing and speech development in children.
- Accurate diagnosis and timely intervention are critical for managing this congenital condition.
- Understanding the anatomical variations associated with atresia is essential for surgical planning.
Purpose:
- To emphasize the importance of early hearing assessment and bone conduction hearing aid fitting for children with external auditory canal atresia.
- To highlight the role of high-resolution computed tomography (HRCT) in precise diagnosis and surgical planning for atresia.
- To discuss surgical approaches and alternative hearing solutions for complex cases.
Summary:
- Children with external auditory canal atresia require prompt hearing assessment and bone conduction hearing aid fitting to support speech development.
- Surgery, typically performed between 5 and 6 years of age, is guided by HRCT for accurate diagnosis of anatomical abnormalities.
- Anatomical variations, such as posterior displacement of the temporomandibular joint due to tympanic bone anomalies, necessitate mastoid approaches for middle ear access, potentially impacting sound coupling.
Impact:
- Early intervention with hearing aids can significantly improve speech and language outcomes in affected children.
- HRCT-guided surgery allows for more precise interventions, potentially improving hearing outcomes.
- Consideration of bone-anchored hearing aids or meatal reconstruction offers solutions for unfavorable surgical cases, enhancing quality of life.
Abstract:
Children with atresia of the external auditory canal should undergo hearing assessment and fitting of a bone conduction hearing aid as early as possible to allow speech to develop normally. Surgery is done between 5 and 6 years of age, guided by high-resolution computed tomography, which provides a more precise diagnosis based on the abnormalities seen. The temporomandibular joint lies more posteriorly than normal due to aplasia or hypoplasia of the tympanic bone, so that the middle ear must be approached through the mastoid, resulting in a less favourable coupling to the middle ear structures. In unfavourable cases bone anchored hearing aids, creation of a meatus for fitting a hearing aid or a bone conduction hearing aid must be considered.