突发性耳聋是耳科急症。其原因众多,主要的有耳蜗血管病变、病毒感染、中毒及噪音。鉴于早就知道 CO_2为强有力的血管扩张剂,许多作者建议用以治疗波动性和突发性耳聋。至今为止,多种研究 CO_2对血流量的效应的方法,如电阻抗体积描记术、微球体技术等,均证明 CO_2使血流量增加,但仍不能完全令人确信血管纹之血流量确实增加。本文作者 Sudden deafness is an otologic emergency. For many reasons, the main cochlear vascular disease, viral infection, poisoning and noise. Given that CO 2 has long been known as a potent vasodilator, many authors recommend treatment for fluctuating and sudden deafness. So far, a variety of methods to study the effects of CO 2 on blood flow, such as electrical impedance plethysmography and microsphere techniques, have all been shown to increase blood flow with CO 2. However, it is still not entirely convinced that the blood flow in blood vessels does increase. The author of this article