The relationship between distortion product otoacoustic emissions and extended high-frequency audiometry in tinnitus patients. Part 1: Normally hearing patients with unilateral tinnitus

被引:55
作者
Fabijanska, Anna [1 ,2 ]
Smurzynski, Jacek [3 ]
Hatzopoulos, Stavros [4 ,5 ]
Kochanek, Krzysztof [1 ,2 ]
Bartnik, Grazyna [1 ,2 ]
Raj-Koziak, Danuta [1 ,2 ]
Mazzoli, Manuela [4 ,5 ]
Skarzynski, Piotr H. [1 ,2 ]
Jedrzejczak, Wieslaw W. [1 ,2 ]
Szkielkowska, Agata [1 ,2 ]
Skarzynski, Henryk [1 ,2 ]
机构
[1] Inst Physiol & Pathol Hearing, Warsaw, Poland
[2] World Hearing Ctr, Kajetany, Poland
[3] E Tennessee State Univ, Dept Audiol & Speech Language Pathol, Johnson City, TN 37614 USA
[4] Univ Ferrara, Dept Audiol, I-44100 Ferrara, Italy
[5] Univ Ferrara, ENT, I-44100 Ferrara, Italy
来源
MEDICAL SCIENCE MONITOR | 2012年 / 18卷 / 12期
关键词
tinnitus; otoacoustic emission; extended high frequency audiometry; COCHLEAR FUNCTION; ACOUSTIC TRAUMA; ASYMMETRY; DPOAE; NOISE; THRESHOLDS; TRANSIENT; MODEL; EAR;
D O I
10.12659/MSM.883606
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
Background: The aim of this study was to evaluate distortion product otoacoustic emissions (DPOAEs) and extended high-frequency (EHF) thresholds in a control group and in patients with normal hearing sensitivity in the conventional frequency range and reporting unilateral tinnitus. Material/Methods: Seventy patients were enrolled in the study: 47 patients with tinnitus in the left ear (Group 1) and 23 patients with tinnitus in the right ear (Group 2). The control group included 60 otologically normal subjects with no history of pathological tinnitus. Pure-tone thresholds were measured at all standard frequencies from 0.25 to 8 kHz, and at 10, 12.5, 14, and 16 kHz. The DPOAEs were measured in the frequency range from approximately 0.5 to 9 kHz using the primary tones presented at 65/55 dB SPL. Results: The left ears of patients in Group 1 had higher median hearing thresholds than those in the control subjects at all 4 EHFs, and lower mean DPOAE levels than those in the controls for almost all primary frequencies, but significantly lower only in the 2-kHz region. Median hearing thresholds in the right ears of patients in Group 2 were higher than those in the right ears of the control subjects in the EHF range at 12.5, 14, and 16 kHz. The mean DPOAE levels in the right ears were lower in patients from Group 2 than those in the controls for the majority of primary frequencies, but only reached statistical significance in the 8-kHz region. Conclusions: Hearing thresholds in tinnitus ears with normal hearing sensitivity in the conventional range were higher in the EHF region than those in non-tinnitus control subjects, implying that cochlear damage in the basal region may result in the perception of tinnitus. In general, DPOAE levels in tinnitus ears were lower than those in ears of non-tinnitus subjects, suggesting that subclinical cochlear impairment in limited areas, which can be revealed by DPOAEs but not by conventional audiometry, may exist in tinnitus ears. For patients with tinnitus, DPOAE measures combined with behavioral EHF hearing thresholds may provide additional clinical information about the status of the peripheral hearing.
引用
收藏
页码:CR765 / CR770
页数:6
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