Effect of edaravone on streptomycin-induced vestibulotoxicity in the Guinea pig.

Objectives/hypothesis: The effect of topical administration of edaravone to the inner ear was investigated in guinea pigs with streptomycin-induced vestibulotoxicity.

Methods: Vestibulotoxicity was induced in 20 animals by delivery of streptomycin into the inner ear through osmotic pump for 24 hours. Edaravone (n = 8, systemic administration group) or saline (n = 6, control group) was injected intraperitoneally once a day for 7 days or edaravone-soaked Gelfoam was placed on the round window before wound closure (n = 6, topical administration group).

[Surgical reconstruction of the common carotid artery by an ePTFE graft for invasive thyroid cancer: a case report].

Surgical reconstruction of the carotid artery using a synthetic graft is rarely performed. A 71-year-old woman developed hoarseness and was diagnosed as having thyroid cancer. Computed tomography (CT) and angiography revealed an irregular thyroid tumor invading the left common carotid artery, and encasement of the artery by the tumor.

[Internet survey of the relationship between vertigo and stress].

We studied the relationship between vertigo and stress, using an internet survey. A questionnaire posted on our homepage quantified and measured 4 categories: cause of anxiety, behavioral characteristics, mean of relaxation, and frequency of vertigo. There were 6065 responses.

Protective effect of edaravone against streptomycin-induced vestibulotoxicity in the guinea pig.

This study investigated alleviation of streptomycin-induced vestibulotoxicity by edaravone in guinea pigs. Edaravone, a free radical scavenger, has potent free radical quenching action and is used in clinical practice to treat cerebral infarction. Streptomycin was administered to the inner ear by osmotic pump for 24 h, and edaravone (n=8) or saline (n=6) was intraperitoneally injected once a day for 7 days.