[The application of U-shaped cartilage-perichondrium tympanoplastyfor subtotal tympanic membrane perforation].

To evaluate the anatomical and functional results of U-shaped cartilage-perichondrium tympanoplasty for subtotal tympanic membrance perforation.A retrospective study was carried out 45 patients(45 ears) with chronic otitis media treated with U-shaped cartilage-perichondrium tympanoplasty.Patients were followed up to assess anatomic and functional results and the data was analyzed statistically.Forty-five cases were followed up successfully,all cases had a tympanic membrane with no irregularities(100%),and the average air-bone gaps of pure tone audiometry of 0.25,0.50,1.00,2.00,4.00 kHz were reduced significantly(<0.05).U-shaped cartilage-perichondrium tympanoplasty for subtotal tympanic membrane perforation is good with high survival rate and better results of hearing.