振动声桥与软带BAHA在双侧中外耳畸形患者的效果比较OA北大核心CSCDCSTPCD

Objective To compare hearing improvement effect of VSB and BAHA (Bone-anchored hearing aids) soft⁃band on patients with bilateral congenital deformation of middle and outer ears. Method comparing results of pure tone audi⁃ometry (sound field) and speech recognition rate at 65dB SPL in quiet and noise settings for 2 patients self-control with VSB or BAHA softband. Results The patients obtain obvious hearing improvement in two ways. by the pure tone (sound field) audi⁃ometry, hearing of air conduction threshold to normal level (<25dB) at1kHz-8kHz with VSB, and 30-50dB with softband BAHA, while at 0.25kHz and 0.5kHz, softband BAHA can obtain further 10-25dB improvement than VSB. In quiet state, speech recognition rates of the monosyllabic words and two syllable words with VSB are higher than those with softband BAHA by 7%-38%;but as for sentence recognition rate, it is only 2-10%difference between VSB and softband BAHA in qui⁃et and noisy environment. Conclusion VSB and softband BAHA are both effective solution to improve hearing for patients with bilateral congenital deformation of middle and outer ears. At high frequencies (1kHz-8kHz) VSB is better than softband BAHA, however it is vice versa at low frequencies (0.25kHz,0.5kHz). In quiet state speech recognition rates of monosyllabic words and two syllable words with VSB are better than those with softband BAHA, while it is only slight higher to sentences recognition rate in quiet and noisy setting.