Audiological Evaluation and Cochlear Reserve in Posterior Canal Benign Paroxysmal Positional Vertigo | ||||
| The Egyptian Journal of Hospital Medicine | ||||
| Article 111, Volume 94, Issue 1, January 2024, Page 761-764 PDF (379.28 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejhm.2024.343128 | ||||
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| Abstract | ||||
| Background: Benign paroxysmal positional vertigo (BPPV) is a peripheral vestibular disorder affecting the semicircular canal (SCC). It is important to determine the potential contribution of posterior canal BPPV (PC-BPPV) to function of cochlear outer hair cells, by application of Otoacoustic emission (DPOAE and TEOAE) and to investigate changes of pure tone audiometry (PTA) thresholds in patients suffering from PC-BPPV. Objective: This study aimed to assess the audiological and cochlear reserve in PC-BPPV. Patients and Methods: This prospective study involved twenty patients with PC-BPPV. All patients in this study were evaluated by the Dix Hallpike test.Basic audiological evaluations included pure tone audiometry (PTA), immittancemetry and otoacoustic emissions audiometry (OEA), which included transient-evoked otoacoustic emissions (TEOAE) and distortion product otoacoustic emissions (DPOAE). Results: There was a significant positive correlation between age and pure tone audiometry (PTA), which increased by increase of the age in the studied PC-BPPV patients. Also, there was a significant negative relationship only between DPOAE (1 KHz) and PTA (1 KHz) but DPOA at 2, 4, and 8 KHz revealed statistically non-significant difference at all other OAE PTA. Conclusion: We concluded that as the age increased, a statistically significant threshold increased at high frequencies (4000 to 8000 Hz) suggestive of presbycusis. Considering the correlation between PTA and DPOAE, we concluded that otoacoustic emissions could be a complementary modality for the detection and control of hearing abilities. | ||||
| Keywords | ||||
| BPPV; Posterior semicircular canal; Vertebrobasilar insufficiency; Immitancemetry; Otoacoustic emissions | ||||
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