Acquired external auditory canal stenosis: assessment and management

Abstract

Although acquired external auditory canal was described several years ago, its underlying pathophysiology is now better understood. From this knowledge, improved medical as well as surgical approaches can be developed.

Tympanic Plate Fractures in Temporal Bone Trauma: Prevalence and Associated Injuries

“…Stenosis presumably occurs from marked comminution and displacement of the tympanic plate, resultant loss of anterior wall structural integrity, callus formation, and fibrous inflammation. 20 The management and treatment of external auditory canal stenosis are beyond the scope of this article, but the mainstay of preventive treatment is packing of the canal in cases at high risk for the development of stenosis. Early identification of this injury and medical management can reduce the need for surgery in cases of fixed stenosis.…”

“…Surgery often involves canaloplasty to remove fixed narrowing and bony irregularities, excision of any soft-tissue stenosis, and/or skin grafting, often with restenosis rates as high as 27%. 20 TMJ dysfunction is another possible long-term complication, though acutely there is usually trismus and pain due to regional softtissue and retrodiscal inflammation. 10 For these reasons, it is important for the radiologist to document the presence of a TPF.…”

“…TPFs are important to identify, given the potential for the clinically significant long-term complications of external auditory canal stenosis and trismus. 20 The purpose of this study was to retrospectively review acute posttraumatic HRCT temporal bone studies to determine the true incidence of TPF and to identify other associated temporal bone injuries.…”

Kanaloplasti pada Atresia Liang Telinga Pasca Trauma

“…Adanya kolesteatom yang meluas dari liang telinga ke telinga tengah dan kavum mastoid akan mempengaruhi teknik pembedahan. 9 Tatalaksana atresia liang telinga didapat, dapat dengan medikamentosa pada fase infeksi atau dengan pembedahan jika sudah terjadi fibrosis. Terapi pembedahan diindikasikan untuk koreksi tuli konduksi dan untuk mencegah terbentunya kolesteatom.…”

“…Rendahya perbaikan ini mungkin disebabkan adanya penyakit dasar di telinga tengah atau terjadinya sklerosis membran timpani pasca operasi Banyak teknik yang digunakan untuk menutupi tulang liang telinga yaitu flap meatal, flap regional/ flap pedikel sekitar liang telinga, Full-Thickness Skin Grafts (FTSGs) dan Split-Thickness Skin Grafts (STSGs). 9 Penggunaan flap kulit sekitar telinga dengan vaskularisasi yang lebih baik pada literatur dianjurkan pada atresia liang telinga kongenital maupun didapat. Bell seperti yang dikutip oleh Dhooge dan Vermeersch 10 menggunakan flap kulit kranial anterior dan flap kulit distal posterior.…”