نتایج جستجو برای: loss of hearing
تعداد نتایج: 21191994 فیلتر نتایج به سال:
Background and Aim: Noise induced hearing loss is one of the most common occupational diseases in the world. It is thus introduced as one of the ten principle work-related diseases. According to the estimation of WHO, noise approximately causes a daily loss of 4 million US dollars throughout the world. Materials and Methods: This cross-sectional and analytical study was carried out on 100 worke...
Background: Hearing is one the most important senses of human. Hearing loss is one of the greatest chronic disabilities. Noise induced hearing loss (NIHL) is a common occupational disorder and several factors affect its intensity. One of these factors is individual differences. The aim of present study is the assessment of dyslipidemia’s effect on NIHL. This study was conducted to evaluate as...
Introduction: Sudden sensorineural hearing loss (SSNHL) is a frightening and frustrating symptom for the patient as well as the physician. Prognosis is affected by multiple factors including duration of hearing loss, presence of associated vertigo and tinnitus, and co-morbidities such as hypertension and diabetes. Materials and Methods: Forty subjects presenting to our department with feature...
Background: Occupational noise-induced hearing loss (ONIHL) is a hearing disorder that affects workers all over the world. Preconditioning with several mild or less potent stressors will effectively prevent the development of noise-induced hearing loss. This study investigated the possible preventive effects of normobaric hyperoxia preconditioning on preventing the noise-induced hearing impairm...
The object of the present study was to assess hearing in neonates and children suffering from meningitis using ABR test. There were 40 neonates and children (from birth to 12 years of age). Hearing of these cases was evaluated in two phases: 27-72 hours following the diagnosis and repeated 24-72 hours before discharge. During 24-72 hours following the diagnosis, ABR test revealed no...
background and aim: children with special needs such as those with hearing loss, visual impairment, mental retardation, and physical-motor disability have special conditions, which may adversely affect their parents’ mental health. given the importance of this issue, the present study aimed to investigate and compare the components of quality of life and psychological well-being in mothers of c...
Introduction: Hepatitis B virus is a virus that creates significant hepatic and extra-hepatic complications, with widespread prevalence across the community and body systemic involvement, and can impact on hearing performance. This study aims to evaluate hearing loss among individuals with hepatitis B compared with healthy subjects. Materials and Methods: In this case-control study, 83 HBsAg-...
Inner ear cells are sensitive to some metabolic and hormonal disorders, but the relation between chronic renal failure (CRF), regular dialysis treatment (RDT) and sensorineural hearing loss (SNHL) is still a debatable field. The object of this paper was to verify the presence of SNHL in patients submitted to hemodialysis with different duration due to CRF and in those submitted to conservat...
Objective(s) Despite the enormous heterogeneity of genetic hearing loss, most non-syndromic hearing losses are caused by mutations in the GJB2 gene. We aimed to characterize the mutation profiles of 100 Iranian deaf patients that were under 10 years old. Materials and Methods Patients were tested with direct sequencing of entire coding region of the GJB2 gene. Results Eight known mutations...
در این پروژه فیلترهای مایکرواستریپ جدیدی برای بهدست آوردن اندازهی فشرده، پاسخ تیز و نیز باند قطع عریض ارائه شده است که از جملهی آن ها فیلتری است که از سری شدن یک رزوناتور شاخهای منتهی به نیمدایره و یک تکهی شعاعی بهبود یافته به عنوان تضعیف کنندهی هارمونیک، تشکیل شده است. فرکانس قطع -3 db این فیلتر در 1.54 ghz قرار دارد. باند گذر این فیلتر تنها 0.26 ghz است که شامل محدودهی فرکانسی 1.5...
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