title: A case of patulous Eustachian tube associated with dizziness induced by nasal respiration.
abstract: OBJECTIVE
  To determine the relationship between Eustachian tube function and inner ear function in patulous Eustachian tube (pET).
  
  
  METHODS
  We encountered a patient with pET accompanied by dizziness that was induced by nasal respiration. Eye movements were recorded using video-oculography, and Eustachian tube function was assessed using a Eustachian tube function analyzer. Horizontal and vertical components of pupil position were assessed to test fixation, positional, and positioning nystagmus. Impedance testing with a Eustachian tube function analyzer was performed to confirm tympanometry results. We recorded these outcomes until the patient's symptoms improved.
  
  
  RESULTS
  When pET improved, the patient's symptoms were alleviated.
  
  
  CONCLUSIONS
  The present pET patient had mild vestibular symptoms. Therefore, pET patients with dizziness might be misdiagnosed with, for example, superior semicircular canal dehiscence, psychogenic vertigo, or Ménière's disease. For patients with few clinical symptoms or laboratory findings, clinicians need to consider dizziness-induced pET as a possible diagnosis.
authors.affiliation: Kitajima ENT Clinic, 1-15-15 Tagara Nerima-ku, Tokyo 179-0073, Japan; Department of Otolaryngology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan. Electronic address: nao-ake@bk2.so-net.ne.jp.
authors.forename: Naoharu
authors.initials: N
authors.lastname: Kitajima
authors.affiliation: Kitajima ENT Clinic, 1-15-15 Tagara Nerima-ku, Tokyo 179-0073, Japan; Department of Otolaryngology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511, Japan.
authors.forename: Akemi
authors.initials: A
authors.lastname: Sugita-Kitajima
authors.affiliation: Kitajima ENT Clinic, 1-15-15 Tagara Nerima-ku, Tokyo 179-0073, Japan.
authors.forename: Seiji
authors.initials: S
authors.lastname: Kitajima
mesh_terms: D000158:Acoustic Impedance Tests; D000328:Adult; D002150:Caloric Tests; D004244:Dizziness / Q000503:physiopathology*; D005064:Eustachian Tube / Q000000981:diagnostic imaging / Q000503:physiopathology*; D053483:Eye Movement Measurements; D005402:Fistula / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D007759:Labyrinth Diseases / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008297:Male; D012119:Respiration; D012665:Semicircular Canals / Q000000981:diagnostic imaging / Q000503:physiopathology*; D014057:Tomography, X-Ray Computed; D014717:Vertigo / Q000503:physiopathology*; D058585:Vestibular Evoked Myogenic Potentials; D015431:Weight Loss
keywords: Dizziness; Impedance testing; Nasal respiration; Patulous Eustachian tube; Video-oculography