| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem such as a burden to a patient is large, since operation time becomes long and an operation is further required for extraction, for requiring fair skill for performing the operation in a narrow auditory meatus, since an incision must be largely performed more than necessary to be fitted in an eardrum, since a conventionally used eardrum drain tube has a fairly larger collar-shaped body than a tube body on both sides of the internal ear side and the external ear side. SOLUTION: The rear end on the external ear side is arranged in a large diameter. A tip part of a hollow tube arranged in a tapering-off shape toward the front end, is formed so that trimming can be freely performed, and is arranged so as to be insertable into an incision hole arranged in the eardrum under clear vision, and is constituted so as to be capable of naturally falling off. COPYRIGHT: (C)2008,JPO&INPIT
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