منابع مشابه
Ear wax removal: a survey of current practice.
OBJECTIVE To determine the methods of removing ear wax used by local general practitioners and the incidence of associated complications. DESIGN Postal survey of 312 general practitioners serving a population of about 650,000; supplementary study of ear, nose, and throat outpatients to quantify the improvement in aural acuity after wax removal. SETTING Catchment area of the Edinburgh otolar...
متن کاملEar wax removal interventions: a systematic review and economic evaluation.
BACKGROUND Excessive ear wax can lead to symptoms such as hearing loss, tinnitus, itching, vertigo, and pain. Treatment to remove ear wax is generally carried out in primary care, and recent estimates suggest that up to 2million ear irrigations are performed in England andWales each year.1 This places a considerable demand on GP surgeries. A range of simple and often inexpensive remedies and pr...
متن کاملHow polymer additives reduce the pour point of hydrocarbon solvents containing wax crystals.
We have investigated how four different pour point depressant (PPD) polymers affect the pour point transition in mixtures of a single pure wax in a solvent. We used either n-eicosane (C20), CH3(CH2)18CH3, n-tetracosane (C24), CH3(CH2)22CH3 or n-hexatriacontane (C36), CH3(CH2)34CH3 as the wax component with either n-heptane or toluene as the solvent component. For all wax-solvent combinations, t...
متن کاملA technique to produce a mirror-image wax pattern of an ear using rapid prototyping technology.
This article describes the use of computer-aided techniques to produce a wax pattern of a missing ear. A 3-dimensional (3-D) computer model of a conventional cast from a patient was obtained using an optical surface capture device (scanner). The 3-D computer model was inverted, using computer-aided design software. A physical thermoplastic (wax) pattern of the inverted 3-D cast was produced usi...
متن کاملEffects of occupational exposure to a mixture of solvents on the inner ear: a field study.
Some clinical and laboratory studies indicate that industrial solvents such as toluene, styrene, xylene, trichloroethylene and carbon disulfide or their mixtures may affect the inner ear, although the mechanism of this process is still not well understood. The aim of this investigation was to assess the incidence of hearing and vestibular disorders (using modem audiological and vestibular tests...
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ژورنال
عنوان ژورنال: BMJ
سال: 1968
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.4.5630.583-a