![]() The atresia have cosmetically and functional impact on the patients, which is related to the disorder degree (partial or complete) or the extent (unilateral or bilateral).CAA have different grading system, the most applied one is The Jahrsdoerfer grading scale, which is based on preoperative CT scan and appearance of the auricle. This is the basis for repair of aural atresia. On embryological bases, the inner ear is usually normal. Aural atresia mostly affect the right side, osseous more than membranous, and is found in male more than female 3-5 times. Congenital aural atresia may be isolated, a part of syndrome, or chromosomal aberration. The condition is associated with microtia. Proper alignment and soft-tissue strategies are keys to the effective correction of the congenitally atretic ear canal.Īural atresia is a rare condition present at birth, which was estimated to be 1:10,000 to 1:20,000. The previous approach, due to fewer postoperative complications, is now our favorite technique. ![]() ConclusionsĪlthough the findings of the hearing are close. Five cases had postoperative otorrhea, one in the anterior mastoid group and four in the transmastoid group. Lateralization of the graft was seen in one patient in the transmastoid group, and no ossicular chain refixation. TM perforation was seen in two patients (12.51%), one patient in each group. There were no cases of bony canal stenosis. Four patients (25%) developed soft tissue meatal stenosis, with 2 patients in each group. ResultsĪll patients were satisfied with the surgery by improving the hearing up to 35 dB or less after 12 months. Purpose of the study was to compare hearing effects and risks of anterior and transmastoid approaches to external and middle ear restoration in patients with CAA. Postoperatively, patients were tested for hearing recovery and follow-up lasting up to 2 years to record any complications. Ten patients had bilateral atresia, and 6 had unilateral atresia. The study consisted of 16 patients, 8 patients for each group, 10 males and 6 females between 4 and 18 years of age with a median age of 6 years. A retrospective study of 16 cases of CAA was undertaken in the Hearing and Speech Institute between 20. This article describes the writers’ expertise with surgical management of aural atresia. Many surgeons are doubtful to perform a repair due to poor hearing results and the risk of new canal stenosis. Surgical procedures of CAA is not only difficult but has still not been embraced by surgeons. The ossicles often need to be mobilized.Aural atresia (CAA) is a congenital abnormality with hypoplasia or aplasia of the external auditory canal. Surgical reconstruction requires formation of a new EAC and new tympanic membrane (usually with temporalis fascia). course of facial nerve: often abnormally anterior and can be damaged during reconstruction.course of internal carotid artery, and location of the jugular bulb: if abnormal can be hazardous during surgery.both the oval and round window need to be present for successful surgery.stapes: important to note as an abnormal or absent stapes needs to be replaced with a prosthetic.malleus: usually has a rudimentary handle (as there is no normal tympanic membrane).middle ear cavity volume: a width of greater than 3 mm is usually needed for successful surgery.High resolution bony CT reformats is the modality of choice for assessing the external acoustic canal. A number or key points should be looked for and specifically mentioned in reports as it impacts on surgical reconstruction. AssociationsĪlthough frequently isolated (in which case the abnormality is less severe and isolated to the EAC) a number of syndromes are associated with external auditory canal atresia 2: The inner ear and inner auditory canal are typically normal (due to forming earlier in gestation).ĮAC atresia may be complicated by congenital cholesteatoma formation behind the atresia plate or in the middle ear. Pathologyīilateral involvement is seen in approximately one-third of patients 2. The external auditory canal may be completely absent or incompletely atretic with further narrowing contributed to by soft tissue bands.įindings in the middle ear are variable. Clinical presentationĪbnormal appearance of the external ear and conductive hearing loss present from birth.
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