Peripheral auditory assessment in minor head injury - a prospective study in tertiary hospital.

Lingamdenne, Paul Emerson (2008) Peripheral auditory assessment in minor head injury - a prospective study in tertiary hospital. Masters thesis, Christian Medical College, Vellore.

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Abstract

Hearing loss is a common problem encountered in ENT practice. Recognition of hearing loss as a problem by the patient usually occurs when speech frequencies are affected or when there is a sudden hearing loss. Hearing loss following head trauma or head injury is a major medical problem in adults as well as children, which may go unnoticed when the hearing loss does not affect speech frequencies. Sensory neural hearing loss at high frequencies is a frequent finding associated with head injuries. Hearing impairment can be due to central or peripheral causes, middle ear or cochlea being the most common site of peripheral injury. The most pronounced injury is fracture of temporal bone4. In both clinical and animal experimental studies it has been shown that there are various sites of pathology ranging from hair cell damage and degeneration of the organ of corti, ischemia of the 8th nerve to damage of central auditory pathways (due to compromise of blood supply to the inner ear ) either partly or totally. In most cases hearing impairment dissipates during subsequent post traumatic period, but sometimes it may persist or progress. Hearing should be evaluated in all patients with head injury even if they do not complain of hearing loss, as a seemingly minor hearing loss at a very young age becomes severe as age progresses, when combined with other factors which affect hearing. DPOAE should be done in evaluating patients with minor head injury and test need to be done at 3000 Hz and 4000 Hz only, suggesting that time and resources may be saved by restricting the tests to those frequencies. This study has shown that Head injury could have been avoided in all patients who had two wheeler accidents if they were wearing crash helmets.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Peripheral auditory assessment; minor head injury; hearing loss
Subjects: MEDICAL > Otolaryngology
Depositing User: Devi S
Date Deposited: 11 Jul 2017 07:03
Last Modified: 11 Jul 2017 07:03
URI: http://repository-tnmgrmu.ac.in/id/eprint/1439

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