Some authors have reported that significant pressure changes occured in middle ear clefts when nitrous oxide (N2O) is inhaled during general anesthesia . In 18 adult patients without ear diseases who underwent non-otological surgery , middle ear pressure measurements were made with impedance audiometer (Teledyne TA-2C) just before and during N2O anesthesia. The results obtained were as follows:...

in middle ear surgery. Concurrent improvements in the operating microscope made it possible to visualize middle ear structures in amazingly clear detail, and revealed to the ear surgeon the possibilities of preserving or restoring hearing in the surgical treatment of chronic middle ear infections. Since 1952 many articles have appeared describing various techniques of reconstructive surgery of ...

Introduction Middle ear barotrauma is the most common side effect of hyperbaric oxygen therapy. Knowledge and understanding of its pathophysiology are crucial for an accurate diagnosis and proper decision making about treatment and prevention. Objective Describe up-to-date information on pathophysiology of middle ear barotrauma after hyperbaric oxygen therapy considering the physiology of press...

The case of a 2-year-old boy with a right middle ear lipoma and a concomitant chondroma of the left external auditory canal is presented. The patient’s preoperative diagnosis was cholesteatomas of the right middle ear and left external ear canal. A right-sided epitympanotomy was performed. A lump of fatty tissue in the right anterior middle ear cleft that obstructed the Eustachian tube orifice ...

To provide a common ground for the comparison between theory and experiment, this paper presents a framework for the phenomenological description of middle-ear mechanics. The framework defines those measurements sufficient to characterize the transduction properties of the middle ear and its components. Phenomenological equations are represented in the form of an equivalent electrical circuit t...

INTRODUCTION Facial nerve weakness is most commonly due to Bell's palsy or cerebrovascular accidents. Rarely, middle ear tumor presents with facial nerve dysfunction. CASE PRESENTATION We report a very unusual case of middle ear osteoma in a 49-year-old Caucasian woman causing progressive facial nerve deficit. A subtle middle ear lesion was observed on otoscopy and computed tomographic images...

The objective of this study was to produce an improved finite element (FE) model of the human middle ear and to compare the model with human data. We began with a systematic and accurate geometric modeling technique for reconstructing the middle ear from serial sections of a freshly frozen temporal bone. A geometric model of a human middle ear was constructed in a computer-aided design (CAD) en...

BACKGROUND One hundred years ago psychiatrists thought that ear disease could cause insanity by irritation of the brain. Current understanding of the role of the temporal lobes in schizophrenia and their proximity to the middle ear supports this hypothesis. AIMS To establish the rate of middle-ear disease pre-dating the onset of schizophrenia. METHOD Eighty-four patients with schizophrenia ...