Raja Selvam, M R K (2013) Long Term use of Cell Phone in Business Community causing Hearing Loss. Masters thesis, Stanley Medical College, Chennai.
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Abstract
INTRODUCTION: As civilization has progressed, the noise in man‘s environment has increased. The adverse effect of noise is widespread with respect to human physiology and produce changes in many bio systems other than ear. It is however the ear which concerns us here. Noise has been shown to have many effects on people such as, decrease in working efficiency, annoyance, physiological changes in blood pressure and heart rate and psychological distress. The direct auditory effects are interference with speech communication, produced due to the masking background noise, and the primary auditory effect, the capacity of noise to produce hearing loss. AIM OF THE STUDY: Noise induced hearing loss is a preventable hearing disorder. It affects people of all ages and demographic. When increased intensity is transmitted into and through the auditory system noise induced hearing loss results. MATERIALS AND METHODOLOGY: Cross sectional study. N=90, Age group: 18-50 years. Year of study: 2010-2012. Inclusion criteria: 1. 18 – 50 years of age, 2. Healthy male vegetable traders, 3. Any type of mobile phones, 4. Normal intact tympanic membrane. Exclusion criteria: 1. Any history of any other co morbid illness like hypertension, diabetes mellitus, cardiac illness. 2. Any ear disease which have hearing loss 3. Any surgery to the ear with no improvement of hearing after surgery. 4. Any intake of ototoxic medications. SUMMARY: The cross sectional study was conducted from a period of November 2010 to October 2012, to study the effects of cellphone usage over the human auditory system. Total number of subjects – 90 healthy males. All the subjects were in the age group of 18 to 50 years. 37.78% (34 / 90) of subjects had ear warmth. 34.44% (31 / 90) of subjects had ear fullness. 8.88% (8 / 90) of subjects had tinnitus. Pure tone audiometry done periodically at the interval of one year from the baseline audiogram showing threshold changes in one or two frequencies in the follow up audiogram in 10% of the subjects. These candidates must be followed up regularly, for a long term to derive a final conclusion. CONCLUSION: In this study, on following up of 90 candidates for 3 years with pure tone audiometry, no significant hearing loss was observed, except some threshold changes in one or two frequencies in the final follow up audiogram. It is also observed, that the ear symptoms like ear warmth and ear fullness was observed in approximately 30% of subjects and there was no relation between the ear symptoms and threshold changes. Mild cochlear changes can be revealed in Distortion product otoacoustic emissions and auditory brainstem response. However this is a small cross sectional study, a large sample and long term follow up will be required to derive definite conclusions.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Long Term use, Cell Phone, Business Community, Hearing Loss. |
| Subjects: | MEDICAL > Otolaryngology |
| Depositing User: | Devi S |
| Date Deposited: | 27 Mar 2020 06:58 |
| Last Modified: | 27 Mar 2020 06:58 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/12484 |
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