ABSTRACT
Objective To compare the consistency of temporal bone HRCT,tympanium drip method,impedance audiometry for eustachian tube function and exploratory surgery,and to determine the best method for evaluation of eustachian tube function.Methods The examination of the eustachian tube function were given on 68 cases of otitis media with the surgical indication by these three methods above-mentioned in turn.And then compare the evaluation results with the exploratory surgery.Results The count data matching test of temporal bone HRCT,tympanium drip method and impedance audiometry compare with surgery exploration results were κ =0.625,κ =0.472,κ =0.912,respectively,which were in general degree(κ≥0.4).It suggested that the three methods were reliable for evaluation of eustachian tube function.Conclusion Among these three methods,impedance audiometry is the most accurate one,and then temporal bone functional HRCT,the last one is tympanium drip,therefore,the method of impedance audiometry is promoted to evaluate the function of eustachian tube.
ABSTRACT
Middle ear effusion is one of the most common causes which results in refer on hearing screening of infants. Evaluation of middle ear state has been emphasized because the causes and severity of hearing impairment determine the manner of rehabilitation. As a complimentary diagnostic method of middle ear effusion, tympanometry using 226 Hz probe tone has been most commonly used in adult and older children. However, recent reports have indicated obviously that the use of a 1000 Hz tympanometry is more reliable in younger infants and neonates than 226 Hz. This attributes to the developmental changes in acoustic properties and anatomic changes of middle ear structures and ear canal. Given the data reported up to the present, 1000 Hz tympanometry is recommended to diagnose middle ear effusion in children younger than 6 months.
Subject(s)
Adult , Child , Humans , Infant , Infant, Newborn , Acoustic Impedance Tests , Acoustics , Ear Canal , Ear, Middle , Electric Impedance , Hearing , Hearing Loss , Mass Screening , Otitis Media with EffusionABSTRACT
Radiography (conventional and contrasted - canalography) and audioelectrophysiologic (impedance audiometry) tests were correlated with otitis media in 12 middle ear affected and 12 healthy dogs. When comparing both diagnostic methods, it was found that the reliability in the detection of otitis media in dogs was 100 percent for the first and 58.3-60.0 percent for the latter. Thus, it was possible to attest that the impedance audiometry was the most accurate method in the identification of otitis media in dogs when compared with radiographic assessments.
ABSTRACT
BACKGROUND AND OBJECTIVES: Impedance audiometry is a clinically useful method for measuring the physical volume of pneumatized middle ear and mastoid medial using a hermetically sealed probe tip. This study was performed to evaluate the obstructive pathologies of middle ear and mastoid by measuring their volumes in patients of chronic otitis media. MATERIALS AND METHODS: The volume of middle ear and mastoid was measured in 37 ears with dry eardrum perforation by chronic otitis media. For control, we measured the volume in 23 ears with the traumatic tympanic membrane perforation. A comparison was made between the volumes and pneumatization in the mastoid X-ray, the soft tissue density in the computed tomography of temporal bone, and the obstruction site at operative findings. RESULTS: The mean volume of the traumatic tympanic membrane perforation was 6.75+/-0.42 ml. The mean volume of chronic otitis media was 3.36+/-2.19 ml and the volume of the sclerotic group was significantly smaller than that of the pneumatic group in the mastoid X-ray. The pathological group had significantly smaller volume than the non-pathological group at operative findings. CONCLUSIONS: The impedance audiometry enables a rapid and valuable evaluation of the presence or absence of obstructive pathologies in the middle ear and mastoid in chronic otitis media with dry tympanic perforation.