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耳管機能には気圧調節機能,排泄機能,および防御機能がある。
排泄機能の面からの耳管機能検査としては,深町1)の1%インジゴカルミン液を0.1〜0.2cc鼓室内に注入し,正常者では10〜15分で排泄が開始し,60分で終了すると,またRogers2)はフルオレスサインで,直後より10分以内に,熊沢3)はクロマイ点耳液で20″-40″で,富田4)はインジゴカルミンクロマイ点耳液で15分以内に排泄が初まるのを正常とみなしている。これらの検査はすべて液体を使用したもので,液体だと筋性排泄と線毛性排泄の区別がつかないし,また重力による流出も関係すると思われる。今回タンタラム粉末5)を使用し,線毛上皮の機能と言う面からとらえようと試み,造影を行ない,排泄機能を観察し得たので報告する。
Radiographic evaluation of the ability of the tubal cilia of the Eustachian tube to clear the tympanum of tantalum powder which was insufflated into the tympanic cavity through the existing central perforation in patients with chronic otitis media is attempted.
A roentgenogram was taken with the patient in Stenver's and submentovertex positions 1 hour and 3 hours after the insufflation of the tantalum powder. The contrast media was already cleared from the tympanic cavity into the nasopharynx in 5 out of 11 cases in 1 hour and in remaining 6 cases with-in 3 hours.
The advantages of this method are as follows: 1. The technique of this method is rather simple.
2. No restriction in the position of the patient's head is required.
3. The results of the test could be evaluated on roentgenograms.
The disadvantages may be counted in that the method is not applicable to all cases of chronic otitis media and that infection of the tympanic cavity resulting from the test could not be disregarded, and that the method is time-consuming.
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