純音聽閾正常的耳悶患者誘發(fā)性耳聲發(fā)射分析
[Abstract]:objective
The course of sensorineural hearing loss is often irreversible. Once hearing loss occurs, it is difficult to recover to the state before the onset of the disease. Therefore, it is very important to detect the lesion early and strive for early diagnosis and early intervention before hearing loss. To investigate the presence of abnormal otoacoustic emissions (OAE) in patients with normal pure tone threshold for early detection of cochlear lesions.
Method
Forty-three patients (72 ears) with normal pure-tone hearing threshold without external ear, middle ear and facial nerve disorders were selected as the control group. Thirty healthy subjects (60 ears) matched with their age and sex distribution were selected as the control group. Capella Otoacoustic Emission Instrument produced by en company was used to detect transient acoustic evoked otoacoustic emission (TEOAE) and distortion product otoacoustic emission (DPOAE) in both groups. The detection rate, amplitude, TEOAE throughput, signal-to-noise ratio (SNR), waveform repeatability and signal-to-noise ratio (SNR) and repeatability of each frequency band of DPOAE were recorded. Statistical analysis was performed.
Result
1. The detection rate of DPOAE was 100% in the ear stuffy group and the control group at 4-8 kHz. The other frequencies were 0.5 kHz, 0.75 kHz and 1.0 kHz. The detection rate of DPOAE in the ear stuffy group was significantly lower than that in the control group. The difference between the two groups was statistically significant (P 0.05).
2. Compared with the control group, DPOAE amplitude in the auricular stuffy group decreased at 0.5 kHz, 0.75 kHz, 1.0 kHz, 1.5 kHz, 2.0 kHz, 3.0 kHz, 4.0 kHz, 6.0 kHz, 8.0 kHz, and the difference between the two groups was statistically significant (P 0.01).
3. The TEOAE passing rate of 60 ears in the control group was 100% (60/60) and that of 72 ears in the auricular distress group was 90.28% (65/72). The passing rate of TEOAE in the two groups was tested by x2 test. The difference between the two groups was statistically significant (x2 = 6.16, P 0.05).
4. The total repetition rate of TEOAE response wave and the repetition rate of each frequency band were 0.75-1.25 kHz, 1.25-1.75 kHz, 1.75-2.50 kHz, 2.50-3.50 kHz, 3.50-4.50 kHz. The results showed that there was significant difference between the two groups (P 0.05 or P 0.01). The total repetition rate of TEOAE response wave in the ear stuffy group was 0.75-1.25, 1.25-1.75, 1.75-2.50 kHz. The repetition rates of the response bands in the frequency bands from 2.50 to 3.50,3.50 to 4.50kHz were all lower than those in the control group.
5. The total signal-to-noise ratio of TEOAE response wave and the signal-to-noise ratio of each frequency band from 0.75 to 1.25, 1.25 to 1.75, 1.75 to 2.50, 2.50 to 3.50, 3.50 to 4.50 kHz showed significant difference between the two groups (P 0.01). It can be considered that the total signal-to-noise ratio of TEOAE response wave and the total signal-to-noise ratio of the ear-tightness group were 0.75 to 1.25, 1.25 to 1.75, 1.75, 1.75 to 2.50, 2.50 and 2.50 kHz respectively. The signal-to-noise ratios of the response bands in the frequency bands from 3.50,3.50 to 4.50kHz were lower than those in the control group.
conclusion
1. The patients with normal pure tone threshold are not uncommon in clinic, and their hearing function can not be judged as normal because of the normal pure tone threshold test.
2. The TEOAE pass rate, repetition rate, signal-to-noise ratio and DPOAE pass rate and amplitude of the patients with normal pure-tone hearing threshold decreased, indicating that some patients with normal pure-tone hearing threshold had early cochlear lesions. OAE can detect these lesions before the change of pure-tone hearing threshold.
3. For these patients with normal pure tone hearing threshold, the emphasis should be put on health education, warning them to stay away from noise, refuse ototoxic drugs, pay attention to sleep, develop good habits and living habits, and should be followed up for a long time, pay close attention to the patient's hearing status.
4. OAE, a fast, noninvasive and objective audiometric method, can sensitively understand the functional status of inner and outer hair cells, especially in early detection of cochlear lesions, it has greater advantages than pure tone audiometry.
【學(xué)位授予單位】:天津醫(yī)科大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2010
【分類號】:R764.04
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