Most necrotizing (malignant) external otitis (NEO) occurs in diabetic patients and is commonly caused by Pseudomonas aeruginosa. We report an acquired immunodeficiency syndrome (AIDS) patient with NEO caused by Aspergillus fumigatus in which computed tomography (CT) showed destructive petrous bone involvement and magnetic resonance imaging (MRI) of the ear discovered extensive soft tissue and f...

Acute sensorineural hearing loss may appear in some autoimmune diseases. Authors presented a case of 31 years old pregnant woman with Leśniowski-Crohn disease, in who acute total deafness of one ear and sensorineural hearing loss in the second ear appeared after she got pregnant. Immunological etiology was confirmed by presence of antinuclear and anti-type II collagen antibodies. Hearing level ...

In recent years, the open fit hearing aids have been used widely as they are less prominent and more acceptable to patients. The ear mould is replaced with a dome, which manufacturers claim can reduce the occlusive effect compared to a regular ear mould. The receiver-in-the-canal (RIC) aid, which is a type of open fit aid, also gives a more natural sound quality with better signal to noise rati...

Otoacoustic emissions (OAEs) are a class of acoustic signals that are generated in the cochlea and transmitted backward to the ear canal through the middle ear. This is attributed to the active nonlinear mechanism in the cochlea [Kemp 1978]. Distortion product otoacoustic emissions (DPOAEs) are a special type of OAEs generated in response to two pure tone acoustic stimuli with sound pressure le...

Our goal was to establish a contrast injection technique that uses the unique vascular anatomy of the rabbit ear to spare the valuable femoral artery access sites. The central artery of the left ear was cannulated. Contrast injected in a retrograde fashion opacified the right brachiocephalic artery and its branches. The technique can be used in rabbits with the usual bovine-type left common car...

Background: There is evidence that the cochlear volume may influence audiometric thresholds and CI electrodes’ impedance. The aim of present study was to evaluate impedance changes over time correlate them residual cochlea. Methods: An MRI scan performed via 3-D reconstruction before every surgery obtain a for each ear. We repeated assessments electrode impedance, both intra-operatively post-im...

Most necrotizing (malignant) external otitis (NEO) occurs in diabetic patients and is commonly caused by Pseudomonas aeruginosa. We report an acquired immunodeficiency syndrome (AIDS) patient with NEO caused by Aspergillus fumigatus in which computed tomography (CT) showed destructive petrous bone involvement and magnetic resonance imaging (MRI) of the ear discovered extensive soft tissue and f...

Significant advances have been made in our understanding of the functional significance of nitric oxide (NO) in the inner ear. The localization of NO synthase and the nitric oxide production site has now been established by immunohistochemistry and the fluorescent indicator of NO. The functional significance of NO in the inner ear, especially as a neurotransmitter, is becoming increasingly clea...