[Fisch technique in prevention of external pore stenosis and atresia after surgery for congenital aural atresia].

OBJECTIVE: To investigate and evaluate the Fisch technique in prevention of atresia or stenosis of external auditory canal after surgery for congenital aural atresia. METHOD: Seventy-three cases (74 ears) of congenital aural atresia with middle ear deformity during Jan 2000 to June 2006 were studied. All the patients were received trans mastoid antrum canal plasty and tympanoplasty, and Fisch technique was used for canalplasty. There were 59 ears (79.72%) followed-up for six months to 5 years. RESULT: Two ears among 59 ears were re-stenosis (3.38%), which happened inside the new external canals. But no cases had atresia just at the new external pores. The long-term hearing results of 49 ears (83.05%) were stable, and the other ears (10 ears, 16.95%) had hearing loss (> or =15 dB) due to thickening of new tympanic membrane. CONCLUSION: Fisch technique can prevent atresia or stenosis of external auditory canal after surgery for congenital aural atresia. And regular follow-up and antiinflammatory management are necessary after surgery.