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・ Tympanobasis
・ Tympanocentesis
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・ Tympanoctomys
・ Tympanoctomys kirchnerorum
・ Tympanometry
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・ Tympanopalpus dorsalis
・ Tympanoplasty
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・ Tympanopleura atronasus
・ Tympanopleura brevis
・ Tympanopleura piperata
・ Tympanopleura rondoni
・ Tympanosclerosis
Tympanostomy tube
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・ Tympanum (anatomy)
・ Tympanum (architecture)
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・ Tympany Five
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Tympanostomy tube : ウィキペディア英語版
Tympanostomy tube


A tympanostomy tube (also known as a grommet, T-tube, ear tube, pressure equalization tube, vent, PE tube or myringotomy tube) is a small tube inserted into the eardrum in order to keep the middle ear aerated for a prolonged period of time, and to prevent the accumulation of fluid in the middle ear. The operation to insert the tube involves a myringotomy and is performed under local or general anesthesia. The tube itself is made in a variety of designs. The most commonly used type is shaped like a grommet. When it is necessary to keep the middle ear ventilated for a very long period, a "T"-shaped tube may be used, as these "T-tubes" can stay in place for 2-4 years. Materials used to construct the tube are most often plastics such as silicone or Teflon. Stainless steel tubes exist, but are no longer in frequent use.
==Indications==
Guidelines state that tubes are an option in:
# Recurrent acute otitis media: 3 ear infections in 6 months or 4 infections in a year. The evidence for this recommendation; however, is weak.〔
# Chronic otitis media with persistent effusion for 6 months (one ear) or 3 months (both ears).
# Persistent eustachian tube dysfunction
# Barotrauma: Especially for prevention of recurrent episodes (e.g., after air travel, hyperbaric chamber treatment).

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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