TY - JOUR
T1 - Width of Patulous Eustachian Tube
T2 - Comparison of Assessment by Sonotubometry and Tubo-tympano-aerography
AU - Ikeda, Ryokichi
AU - Kawase, Tetsuaki
AU - Takata, Iori
AU - Suzuki, Yoko
AU - Sato, Takeshi
AU - Katori, Yukio
AU - Kobayashi, Toshimitsu
N1 - Funding Information:
Address correspondence and reprint requests to Ryoukichi Ikeda, M.D., Ph.D., Department of Otolaryngology–Head and Neck Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan; E-mail: ryoukich@hotmail.com This study was supported by a grant from JFE (The Japanese Foundation for Research and Promotion of Endoscopy). The authors disclose no conflicts of interest.
Publisher Copyright:
© 2019 Lippincott Williams and Wilkins. All rights reserved.
PY - 2019/4/1
Y1 - 2019/4/1
N2 - Objective: To assess the accuracy of tubo-tympano-aerodynamic- graphy (TTAG) in the estimation of morphological severity of patulous Eustachian tube (PET), and to compare the results with that of sonotubometry in clinical cases and in model experiments. Study Design: Retrospective chart review and model experiment. Setting: Tertiary referral center. Subjects: A retrospective survey of medical records in Sen- En Rifu Hospital identified 26 patients (12 men and 14 women subjects aged 14-78 yr, average 49.4_20.9 yr), comprising of 35 ears with PET. A definite diagnosis of PET was made for all patients based on the diagnostic criteria proposed by the Japan Otological Society. Main Outcome Measures: Commercial equipment for sonotubometry and TTAG (JK-05A; RION Co., Ltd., Kokubunji, Tokyo, Japan) were used in the following investigations. Model Experiment: The ET model was made using two truncated syringes with silicone barrels and a narrow connecting tube (0.2, 0.4, 0.58, 0.8, 1.00, 2.00, and 3.00 mm). Clinical Investigation: Morphological evaluation of ET patency was performed by a three-dimensional (3-D) CT (3D Accuitomo; Morita MFG. Corp., Kyoto, Japan) and analyzed by software (Integrated Information System i-VIEW; Morita MFG. Corp.). Results: The transmitted sound pressure level gradually increased as the tube caliber was widened up to 3mm diameter. On the other hand, pressure transmission was suddenly elevated and reached a plateau at 0.58mm in diameter. The cross-sectional area at the narrowest portion of the ET was significantly correlated with the sound attenuation from nostril to external auditory canal (EAC) (Spearman rank correlation test: R= -0.521, p<0.001). In contrast, the cross-sectional area at the narrowest portion of the ET was not correlated with the pressure changes of TTAG (Spearman rank correlation test: R=0.317, p=0.64). Conclusion: Sound transmission assessed by sonotubometry could be more useful than pressure transmission assessed by TTAG to predict the morphological severity of PET.
AB - Objective: To assess the accuracy of tubo-tympano-aerodynamic- graphy (TTAG) in the estimation of morphological severity of patulous Eustachian tube (PET), and to compare the results with that of sonotubometry in clinical cases and in model experiments. Study Design: Retrospective chart review and model experiment. Setting: Tertiary referral center. Subjects: A retrospective survey of medical records in Sen- En Rifu Hospital identified 26 patients (12 men and 14 women subjects aged 14-78 yr, average 49.4_20.9 yr), comprising of 35 ears with PET. A definite diagnosis of PET was made for all patients based on the diagnostic criteria proposed by the Japan Otological Society. Main Outcome Measures: Commercial equipment for sonotubometry and TTAG (JK-05A; RION Co., Ltd., Kokubunji, Tokyo, Japan) were used in the following investigations. Model Experiment: The ET model was made using two truncated syringes with silicone barrels and a narrow connecting tube (0.2, 0.4, 0.58, 0.8, 1.00, 2.00, and 3.00 mm). Clinical Investigation: Morphological evaluation of ET patency was performed by a three-dimensional (3-D) CT (3D Accuitomo; Morita MFG. Corp., Kyoto, Japan) and analyzed by software (Integrated Information System i-VIEW; Morita MFG. Corp.). Results: The transmitted sound pressure level gradually increased as the tube caliber was widened up to 3mm diameter. On the other hand, pressure transmission was suddenly elevated and reached a plateau at 0.58mm in diameter. The cross-sectional area at the narrowest portion of the ET was significantly correlated with the sound attenuation from nostril to external auditory canal (EAC) (Spearman rank correlation test: R= -0.521, p<0.001). In contrast, the cross-sectional area at the narrowest portion of the ET was not correlated with the pressure changes of TTAG (Spearman rank correlation test: R=0.317, p=0.64). Conclusion: Sound transmission assessed by sonotubometry could be more useful than pressure transmission assessed by TTAG to predict the morphological severity of PET.
KW - Middle ear pressure
KW - Patulous Eustachian tube
KW - Sonotubometry
KW - Three-dimensional (3-D) computed tomography
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U2 - 10.1097/MAO.0000000000002141
DO - 10.1097/MAO.0000000000002141
M3 - Article
C2 - 30870363
AN - SCOPUS:85062977256
SN - 1531-7129
VL - 40
SP - E386-E392
JO - American Journal of Otology
JF - American Journal of Otology
IS - 4
ER -