A method to assess the accuracy of sonotubometry for detecting Eustachian tube openings

被引:0
作者
J. Douglas Swarts
Miriam S. Teixeira
Juliane Banks
Jenna El-Wagaa
William J. Doyle
机构
[1] University of Pittsburgh,Department of Otolaryngology
[2] School of Medicine,undefined
来源
European Archives of Oto-Rhino-Laryngology | 2015年 / 272卷
关键词
Eustachian tube; Adults; Sonotubometry; Methodology;
D O I
暂无
中图分类号
学科分类号
摘要
Sonotubometry is a simple test for Eustachian tube (ET) opening during a maneuver. Different sonotubometry configurations were suggested to maximize test accuracy, but no method has been described for comparing sonotubometry test results with those for a definitive measure of ET opening. Here, we present such a method and exemplify is use by an accuracy assessment of a simple sonotubometry configuration. A total of 502 data-sequences from 168 test sessions in 103 adult subjects were analyzed. For each session, subjects were seated in a pressure chamber and relative middle ear over- and under-pressures created by changing chamber pressure. At each pressure, the test sequence of bilateral tympanometry, bilateral sonotubometry while the subject swallowed twice, and bilateral tympanometry was done. Tympanometric data were expressed as the fractional gradient equilibrated (FGE) by swallowing and sonotubometric signals were analyzed to record the shape of detected sound signals. Tympanometric and sonotubometric tubal opening assignments were analyzed by cross-correlation. For the data sequences with FGE = 0 (n = 32) evidencing no tubal opening and one (n = 249) evidencing definitive tubal opening, detection of a sonotubometry sound signal during a swallow had a sensitivity and specificity of 74.2 and 65.6 % for identifying ET openings and an accuracy of 73.3 % for assigning ET opening/non-opening by swallowing. Measures of sound signal shape were significantly different between those groups. This protocol allows a sonotubometry accuracy assessment for detecting ET openings. For the test configuration used, accuracy was moderate, but this should improve as more sophisticated sonotubometry test configurations are evaluated.
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页码:2111 / 2119
页数:8
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