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LFHLLow-Frequency Hearing Loss
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More reliable results could have been yielded, particularly considering ISSNHL patients with low-frequency hearing loss. Procalcitonin levels were lower in patients with good prognosis; however, this difference could not reach a statistically significant level.
The initial audiogram shows a mild sloping to moderately severe hearing loss bilaterally, with a more pronounced low-frequency hearing loss on the right.
Outcome n % None 10,056 60.9 Any 6,469 39.1 Bilateral 3,187 19.3 Left Ear Unilateral 2,070 12.5 Right Ear Unilateral 1,212 7.3 Low-Frequency Hearing Loss (>25 dB LFPTA *) None 15,102 91.4 Any 1,423 8.6 Bilateral 653 4.0 Left Ear Unilateral 470 2.8 Right Ear Unilateral 300 1.8 High-Frequency Hearing Loss (>25 dB HFPTA ([dagger])) None 12,889 78.0 Any 3,636 22.0 Bilateral 1,356 8.2 Left Ear Unilateral 1,520 9.2 Right Ear Unilateral 760 4.6 Note: Any = hearing loss on any audiogram including baseline, predeployment, or postdeployment audiogram.
In Guinea pig models, surgically induced hydrops reduced 8th cranial nerve diameter and caused differential nerve damage in that neuronal loss was greater than inner hair loss at the apex, consistent with typical low-frequency hearing loss in MD.
Findings showed that obese adolescents had increased hearing loss across all frequencies and were almost twice as likely to have unilateral (one-sided) low-frequency hearing loss.
Among middle-aged and elderly people with the normal Hb AA genotype, high-frequency hearing loss is more common among men than women and low-frequency hearing loss is more common among women than men.
During follow-up, 3,532 individuals developed high-frequency hearing loss, and 1,575 developed low-frequency hearing loss. While the association between smoking and high frequency hearing loss was stronger than that of low frequency hearing loss, the risk of both high and low frequency hearing loss increased with cigarette consumption, the researcher said.
A 9-year-old girl presented with a progressive left-sided conductive low-frequency hearing loss of 35 to 45 dB.
Correspondingly, the annual rate of low-frequency hearing loss was faster during the 10th decade.
The patient had brought with him the results of serial audiometric tests that had showed a fluctuating low-frequency hearing loss in the right ear, although one of these tests showed that the right ear was normal.
The authors also described a patient with a low-frequency hearing loss after spinal anesthesia that resolved immediately with a blood patch.
Thus, in the long term, 4 of the 8 patients had a moderate low-frequency hearing loss, 3 patients had a severe loss, and 1 had a profound loss.
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