Three-dimensional computed tomography imaging in the sitting position for the diagnosis of patulous Eustachian tube

Toshiaki Kikuchi, Takeshi Oshima, Masaki Ogura, Yoko Hori, Tetsuaki Kawase, Toshimitsu Kobayashi

研究成果: Article査読

45 被引用数 (Scopus)

抄録

OBJECTIVE: Computed tomography (CT) in the sitting position was useful for detecting patulous Eustachian tube (ET). STUDY DESIGN: Retrospective. SETTING: Tertiary referral center. PATIENTS: Eighty-seven patients divided into two groups. The patulous ET group consisted of 111 ears of 67 patients with patulous ET. The control group consisted of 30 ears of 20 patients without symptoms characteristic of patulous ET or abnormal findings in ET function tests. MAIN OUTCOME MEASURES: CT was performed under the resting condition and during Valsalva maneuver (Valsalva condition). The multiplanar reconstruction technique was used to reconstruct 1-mm-thick gapless images parallel to and perpendicular to the ET long axis. The open tubal distance (OTD) and average ET-gram were examined. RESULTS: The OTD was significantly longer in the patulous ET group than in the control group under both resting and Valsalva conditions (both p < 0.001). The OTD was also significantly longer under the Valsalva condition than under the resting condition in both groups (p < 0.01 in the patulous ET group, p < 0.001 in the control group). The average ET-gram showed an occlusive zone in the cartilaginous portion medial to the isthmus under both the resting and Valsalva conditions in the control group (n = 30). However, the occlusive zone could not be observed under either the resting or Valsalva conditions in the patulous ET group (n = 111). Completely patent (open) ET was observed with continuous hyperlucency from the pharyngeal to the tympanic orifices in 88 of 111 patients in the patulous ET group, but in none of the control group, indicative of 100% specificity. CONCLUSION: Computed tomography in the sitting position employing Valsalva maneuver is useful for the diagnosis of patulous ET.

本文言語English
ページ(範囲)199-203
ページ数5
ジャーナルOtology and Neurotology
28
2
DOI
出版ステータスPublished - 2007 2月

ASJC Scopus subject areas

  • 耳鼻咽喉科学
  • 感覚系
  • 臨床神経学

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