Sudden Deafness

Sudden deafness is a common emergency in otorhinolaryngology. As the etiology and mechanism of sudden deafness remains unknown, there is no specific treatment. Therefore, to explore new treatments for sudden deafness is a urgent and challenging problem. Extracellular vesicles therapy has been proved to be effective for several diseases. From our previous study, extracellular vesicles from mesenchymal stem cell can effectively improve noise-induced sensorineural deafness in mice. While mesenchymal stem cell therapy faces immune rejection in clinical use, the investigators use autologous blood monocyte vesicles to avoid immune rejection and guarantee patients' safety. In this interventional study, the investigators aimed to study the clinical effects and adverse reactions of autologous blood monocyte vesicle therapy in the treatment of sudden deafness. A total of 30 patients with severe or worse sudden deafness will enroll in this study and randomly assigned to 3 group, which are control group (Intratympanic glucocorticoid injection), lower-dose apoVs group (lower dose of Intratympanic monocyte vesicles injection) and higher-dose apoVs group (higher dose of Intratympanic monocyte vesicles injection). This study will further promote new treatment for sudden deafness and improve the quality of life and prognosis of patients with sudden deafness, especially those with severe or extremely severe deafness.