聽阻聽力檢查在重症肌無力症診斷上的評價

The Value of Impedance Audiometry in the Diagnosis of Myasthenia Gravis

李進賢(Chin-Hsien Lee)

《中華民國耳鼻喉科醫學會雜誌》 28卷6期 (1993/12) Pp. 399-403

https://doi.org/10.6286/1993.28.6.399

摘要

重症肌無力症在臨床上的主要特徵乃是當肌肉用力時很容易疲勞，但經過休息或注射膽鹼酯酶抑制劑即可恢復。我們據此利用聽阻聽力檢查，對3名重症肌無力症的病人測定其中耳肌肉的現象。
所有3名病人，在注射neostigmine15分鐘後，或口服Mestinon1小時後，其鼓室圖至A型，而鐙骨肌反射恢復為正常的強度。檢查中，可發現鐙骨肌反射的衰退現象。
因此，聽阻聽力檢查對重症肌無力症的診斷，相當有價值。其結果不但客觀，而且容易。

關鍵字

鐙骨肌反射 ； 鼓室圖

並列摘要

The main clinical feature of myasthe-nia gravis is that the fatigue consequent on muscular effort can be eliminated by rest or injection of cholinesterase inhibitors. We employed impedance audiometery to determine the manifestation of myasthenia gravis as well as its impact on the middle ear muscle in three patients. Prior to the injection of neostigmine, all three patients displayed C type tympanogram and no clearly observable stapedius reflex. The tympanogram turned to A type and the stapedius reflex resumed normal amplitude either 15 minutes after injection of neostigmine or 60 minutes after oral intake of Mestinon. A decline I nstapedius reflex was also noticed. Therefore, impedance audiometery is a trustworthy method for the diagnosis of myasthenia gravis because of the objective result and its easy application.

並列關鍵字

stapedius reflex ； tympanogram