Introduction: Traumatic brain injuries are the most common cause of olfactory dysfunction. Deficits in olfaction may be conductive or neurosensory in nature, with varying degrees of impairment resulting in a diminished quality of life and an increased risk for personal injury among patients. The aim of this research is to evaluate the results of the subjective and objective quantitative examinations of olfactory function in a group of patients with post-traumatic anosmia in order to predict its value in identifying olfactory deficits in clinical practice. Materials and Methods: The present study included 38 patients who reported anosmia or hyposmia caused by a traumatic head injury, and a group of 31 age- and sex-matched controls without olfactory dysfunction or prior history of head injury. The comparison of odor perception and identification of two oils (mint and anise) was assessed with the use of blast olfactometry with cortical olfactory event-related potentials. Results: Subjective olfactory tests revealed anosmia or hyposmia in 94% of patients with head injury-related olfactory dysfunction. Objective tests revealed olfactory event-related potentials from cranial nerve I produced by the stimulation with both mint and anise in 20 patients (52.6%). Olfactory event-related potentials from cranial nerve V produced by the stimulation with mint were registered in 26 patients (68.4%). The lack of any responses, from both cranial nerve I and V, was found in 12 patients (32% of cases). Conclusions: Findings from our study indicate the application of both subjective and objective examinations in the evaluation of patients with olfactory impairment. In the diagnosis of post-traumatic anosmia or hyposmia, objective examinations are particularly useful when the patients' level of cognition may be impaired or when subjects may be exaggerating their olfactory defects for a secondary gain. The diagnosis of damage to the olfactory system, specifically in the receptive part of the olfactory pathway, can be established in patients who showed reduced amplitudes or absent cortical responses in addition to absent odor identification and perception threshold in the subjective examination.
Background. Objective electrophysiological methods for investigations of the organ of smell consist in recordings of olfactory cortex responses to specific, time restricted odor stimuli. In hypothyroidism have impaired sense of smell. Material and Methods. Two groups: control of 31 healthy subjects and study group of 21 with hypothyroidism. The inclusion criterion for the study group was the TSH range from 3.54 to 110 μIU/mL. Aim. Assessment of the latency time of evoked responses from the olfactory nerve N1 and the trigeminal nerve N5 using two smells of mint and anise in hypothyroidism. Results. The smell perception in subjective olfactory tests was normal in 85% of the hypothyroid group. Differences were noticed in the objective tests. The detailed intergroup analysis of latency times of recorded cortical responses P N5 and P N1 performed by means between the groups of patients with overt clinical hypothyroidism versus subclinical hypothyroidism demonstrated a significant difference (p < 0.05) whereas no such differences were found between the control group versus subclinical hypothyroidism group (p > 0.05). Conclusion. We can conclude that registration of cortex potentials at irritation of olfactory and trigeminal nerves offers possibilities for using this method as an objective indicator of hypothyroidism severity and prognostic process factor.
[b]Introduction.[/b] Parents as day-to-day caregivers looking after their children's health and upbringing are crucial in the process of hearing loss prevention among the young. The aim of the study was to assess the parents' knowledge and awareness of hazards bringing about hearing loss, possibilities to prevent this, as well as their reaction in the case of problems of their children with hearing. [b]Material and methods. [/b]The research group comprised respondents (402 persons), medical or paramedical professionals. None of the surveyed was a doctor. 56% of the surveyed were inhabitants of large cities, 24% of small towns, and 20% of village, mostly located in the area of Greater Poland (Wielkopolska) (97%). To perform the research a survey was devised. GSES scale was applied as an accessory tool. [b]Results. [/b]The subjects surveyed posses a great deal of knowledge concerning basic conditions that could adversely affect the hearing of children. Village inhabitants are half as afraid of hearing loss hazards as the inhabitants of large cities. More than 40% of the respondents claimed they do nothing to counteract their children's overexposure to noise. In 48.5% of cases, GPs had not drawn parents' attention to possible complications resulting from upper respiratory tract infections in children. Parents know where they should go to in case their children develop hearing problems or sudden hearing loss. [b]Conclusions.[/b] Knowledge and awareness of factors that may trigger hearing loss is not synonymous with avoidance of the problem. Main components of hearing loss prevention among children and youths should be administrative actions, extensive education, and proper childcare at home.
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