Refractory Sensorineural Hearing Loss Research Articles

Vestibular and cochlear nerve enhancement on MRI and its correlation with vestibulocochlear functional deficits in patients with Ramsay Hunt syndrome

ObjectiveThe correlation between enhancement of the vestibulocochlear nerves on gadolinium-enhanced magnetic resonance imaging (MRI) and vestibulocochlear functional deficits was examined in patients with Ramsay Hunt syndrome (RHS). MethodsNineteen patients with RHS who showed herpes zoster oticus, peripheral facial palsy, and vertigo were enrolled. Canal paresis (CP) in the caloric test, abnormal response to ocular and cervical vestibular myogenic potentials (oVEMP and cVEMP), and refractory sensorineural hearing loss were evaluated. MRI images perpendicular to the internal auditory canal were reconstructed to identify the superior (SVN) and inferior vestibular nerves (IVN) and the cochlear nerve (CV). The signal intensity increase (SIinc) of the four-nerve enhancement was calculated as an index. ResultsAmong RHS patients, 79%, 53%, 17% and 26% showed CP in the caloric test, abnormal responses to oVEMP and cVEMP, and refractory sensorineural hearing loss, respectively. SIinc rates of the SVN were significantly increased in RHS patients with CP in the caloric test, and with abnormal responses to oVEMP and cVEMP. SIinc rates of the SVN tended to increase in RHS patients with refractory sensorineural hearing loss (p = 0.052). SIinc rates of the IVN were significantly increased in RHS patients with abnormal responses to oVEMP and cVEMP, and refractory sensorineural hearing loss, but not in those with CP in the caloric test. SIinc rates of the CN were significantly increased in RHS patients with CP in the caloric test, abnormal response to oVEMP and refractory sensorineural hearing loss, but not in those with abnormal response to cVEMP. ConclusionIn patients with RHS, the origin of vertigo may be superior vestibular neuritis, which is affected by reactive varicella-zoster virus from the geniculate ganglion of the facial nerve through the faciovestibular anastomosis. The results also suggested that in some RHS patients, inferior vestibular neuritis contributes to the development of vertigo and that the origin of refractory sensorineural hearing loss is cochlear neuritis.

Acupuncture for Refractory Cases of Sudden Sensorineural Hearing Loss

The aim of this study was to investigate the effect of acupuncture on the treatment of refractory sensorineural hearing loss (SSHL), treatment of which remains a major clinical challenge. The study design was descriptive research to document the effect of acupuncture in a series of SSHL cases. The study was conducted in the outpatient clinic of Kyung Hee University Hospital. The subjects analyzed were 17 patients with refractory SSHL of more than 3 weeks after a failed trial of conventional treatment including corticosteroids. Acupuncture sessions were performed twice a week using a modified Saam acupuncture formula and such acupoints as GV14, GV15, and others, in addition to usual patient care educations. Improvement was defined as increased hearing threshold from initial measurement by more than 20 dB in at least two contiguous frequencies of audiometric testing. An audiogram pattern was also analyzed. The average refractory period before acupuncture treatment was 213.9 days (range 22-1460). First follow-up measurement after 9.5 times of acupuncture treatment for 29.9 days showed improvement in 4 of 16 cases examined (25.0%) and second follow-up measurement after 18.7 times of acupuncture treatment for 70.4 days in another 4 of 12 cases examined (33.3%). A total improvement rate after day 70.4 post initial visit was 47.1% (8 of 17 cases). As to the audiogram pattern, an ascending or midhumping pattern was related to a good prognosis, while a descending pattern was not. These findings suggest that acupuncture might be effective in refractory sensorineural hearing loss with failure of conventional therapy.

Idiopathic sensorineural hearing disorders in adults—a pragmatic approach

Acute or progressive sensorineural hearing loss, with or without vertigo and tinnitus, has a considerable impact upon an individual's quality of life. Sensorineural hearing disorders are more commonly observed in patients with rheumatic disease than in the general population, are more likely to be accompanied by the presence of serum autoantibodies, and might respond to steroid therapy. A subgroup of these disorders seem to be immune mediated, but audiologic presentation and serologic testing do not enable this subgroup to be further defined. Rheumatologists should be prepared to manage patients with known rheumatic disease who develop acute hearing loss and to evaluate referred patients without known rheumatic illness experiencing progressive or refractory sensorineural hearing loss. In this article, we summarize the literature and outline a rational approach for the evaluation and treatment of such patients.