Roentgenologic and Pathologic Examination of the Osseous Auditory Tube in Chronic Suppurative Otitis Media

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  • 慢性中耳炎における骨性耳管のX線学的及び病理組織学的研究
  • マンセイ チュウジエン ニ オケル ホネ セイ ジカン ノ Xセンガクテキ オ

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Abstract

The method of radiography of the osseous auditory tube with or without contrast medium and its validity in diagnosis of chronic supprative otitis media was examined.<BR>1. The best roentgenogram of the osseous tube was found to be obtained by projection of X-ray in the vertical plane with 5 degrees of lateral deviation. In contrast radiography of the tube, radio-opaque (40 per cent moljodol) was injected into the tube using Atom LG-2 Lymphography from the pharyngeal orifice with pressure of 3 kg/cm2.<BR>2. In simple osseous-tubo-radiography, linear shadows of the anterior and posterior wall of the tube and that of the surrounding tissues were found to demonstrate pathological changes in the osseous auditory tube.<BR>3. In chronic suppurative otitis media, the shadow of“semicanalis musculi tensoris tympani”showed marked irregularity.<BR>4. By combination of three tests, that is-simple osseous-tubo-radiography, contrast osseous-tubo-radiography and chloromycetin test, pathological changes of the osseous auditory tube in chronic otitis media can be evaluated more accurately. About 81% of cases with chronic supprative otitis media were found to have abnormal findings in these three tests.<BR>5. Validity of tests above-mentioned was confirmed through both macroscopic findings of the tympanic orifice of the tube during ear surgery and histological findings of the tissue around the osseous tube.

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