Browsing by Author "Yücetürk, AV"

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    Rhinocerebral mucormycosis
    Orguc, S; Yücetürk, AV; Demir, MA; Goktan, C
    We report a case of rhinocerebral mucormycosis associated with an abscess in the lateral aspect of the pons associated with perineural spread of disease via the trigeminal nerve. Contrast enhanced MRI was useful in depicting the extent of the disease and suggesting perineural spread. A pathological diagnosis of mucormycosis was established by means of rhino-orbital punch biopsy. (c) 2005 Elsevier Ltd. All rights reserved.
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    Changes in growth pattern, body composition and biochemical markers of growth after adenotonsillectomy in prepubertal children
    Ersoy, B; Yücetürk, AV; Taneli, F; Ürk, V; Uyanik, BS
    Objective: Adenotonsillar hypertrophy (ATH) is associated with growth interruption during childhood. The aim of this study was to determine the changes in growth, body composition and biochemical markers associated with growth following adenotonsillectomy (A&T) in prepubertal children. Study design: Twenty-eight children aged 3-10 years (mean age 73.90 +/- 20.97 months) with ATH were followed up for 1 year after A&T. During the same period of time, 20 healthy children of similar ages (mean age 73.7 +/- 18.2 months) were followed up too. Methods: Height, weight as well as insulin-like growth factor-1 (IGF-1) and insulin-like growth factor binding protein-3 (IGFBP-3) were measured during the preoperative period, 6 months and 1 year after surgery. Results: Height and weight of the patient group significantly increased during the first year after A&T (p < 0.01). Increase in height standard deviation score (SDS) during the first postoperative year reflected a true acceleration of growth (p = 0.04). Height and weight of patients were not significantly below those of their healthy peers at the preoperative measurement. Height velocity of the patients (p = 0.118), which was similar to that of their healthy peers in the first 6 months postoperatively, was significantly higher at the end of the second 6-month period after the operation (p = 0.048). IGF-1 levels of the patient group, which were significantly lower than those of the controls preoperatively (p < 0.001), increased to similar levels 1 year after the operation. IGFBP-3 levels of the patient group increased significantly after postoperative sixth month (p = 0.002). Conclusion: Although children with ATH do not have significant growth retardation, their growth rate is slower. Increase in weight and IGF-1 levels followed by the increase in height leads to an acceleration in growth rate after A&T These results have led to the conclusion that either the levels or effect of growth hormone (GH) increase following A&T. (c) 2005 Elsevier Ireland Ltd. All rights reserved.
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    Multidimensional assessment of voice and speech after supracricoid laryngectomy with cricohyoidopexy
    Yücetürk, AV; Günhan, K
    This study was designed: to evaluate the vocal function in the patients with supracricoid laryngectomy (SCL) compared with normal subjects; to determine the factors affecting voice (such as number of arytenoid(s) preserved and movement of larynx and tongue base); and to determine the correlations between videolaryngostroboscopy, acoustic and perceptual parameters. Ten patients who underwent SCL with cricohyoidopexy for primary laryngeal squamous cell carcinoma were included into the study. Vocal function was investigated by means or videolaryngostroboscopy. Voice quality was assessed by means of objective acoustic analysis and subjective perceptual ratings by trained raters. Aberrant, incompetent, and rough mucosal wave was observed in the anterior and superior surfaces of arytenoids(s), the inferior part of tongue base and the lateral walls of the hypopharynx. The acoustic parameters were found to be significantly different from those of normal subjects. The values of perceptual scores were approximately within 50 per cent of normal range. The number of arytenoids spared did not affect acoustic or perceptual measurements. A rough, breathy, unpleasant but intelligible and acceptable voice could be obtained after SCL with cricohyoidopexy.
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    Voice analysis and videolaryngostroboscopy in patients with Parkinson's disease
    Yücetürk, AV; Yilmaz, H; Egrilmez, M; Karaca, S
    Parkinson's disease (PD) is clinically characterized by a resting tremor, bradykinesia, cogwheel phenomenon, rigidity, disorder of postural reflexes and especially changes in voice and speech. We studied 30 PD patients who were treated with dopamine and 20 normal subjects as the control group. The parameters of vocal fold edges, glottal closure, vertical levels of cords, amplitude of vibration, mucosal wave, vibratory behavior, phase symmetry, ventricular folds and movements, periodicity, arytenoids and thick mucous were evaluated by videolaryngostroboscopy. The Unified Parkinson's Disease Rating Scale was applied to the patient group. The voices of the patients were evaluated by the Dr.Speech-4 and Spectra-PRO computer programs. Maximum phonation time, fundamental frequency, amplitude and the harmonic-to-noise ratio were recorded and compared with those of the control group. The abnormal videolaryngostroboscopic findings were more frequent in the PD group (70% versus 45%; P<0.05). Voice analysis showed significant differences in the parameters such as maximum phonation time, maximum fundamental frequency, the frequency range and the harmonic-to-noise ratio. We thought that these methods and parameters yielded sufficient information for diagnosis and follow-up of vocal function in patients with PD.
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    Acute Spiral Ganglion Cell Degeneration following Acoustic Overstimulation: An Experimental Study
    Eskiizmir, G; Yücetürk, AV; Inan, S; Gürgen, SG
    Background: To evaluate acoustic overstimulation-induced spiral ganglion cell (SGC) degeneration, and determine the relationship between the duration of acoustic overstimulation and rate of SGC degeneration. Methods: Fifteen guinea pigs were randomized equally to 4 experimental groups, which were exposed to different durations (7.5, 15,30 and 60 min) of acoustic overstimulation (120 dB at 4 kHz), and a control group. Every bulla was examined histopathologically and immunohistochemically. A quantitative and statistical analysis of acidophilic and TUNEL-positive SGCs was performed. Results: In the control group, 2.1% of SGCs were acidophilic and no TUNEL-positive SGC was detected. In contrast, a statistically significant number of acidophilic (p = 0.000) and TUNEL-positive SGCs (p = 0.002) was determined in the experimental groups. Moreover, a positive correlation between the duration of acoustic overstimulation and acidophilic SGCs (p = 0.000), and a statistically significant relationship between the duration of acoustic overstimulation and TUNEL-positive SGCs (p = 0.000) were demonstrated. Conclusion: Acoustic overstimulation may induce acute SGC degeneration. A positive correlation was determined between the duration of acoustic overstimulation and rate of degenerated SGCs. Copyright (C) 2010 S. Karger AG, Basel