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    Effect of Topical Dexamethasone for Preventing Experimentally Induced Myringosclerosis
    (Galenos Yayincilik, 2017) Uestuendag, Murat; Kocyigit, Murat; Bulut, Erdogan; Altaner, Semsi; Tas, Abdullah; Yagiz, Recep
    Objective: We aimed to examine the effect of topical dexamethasone by otomicroscopic and histologic examinations for preventing myringosclerosis induced by myringotomy in rat tympanic membranes. Methods: Twenty-one Sprague Dawley rats (42 ears) were randomly divided into the following three groups after otomicroscopic examinations: experimental surgical group (5 rats), control group (8 rats), and study group (8 rats). The rats of all the groups underwent myringotomy in both tympanic membranes. Other than myringotomy, no additional procedure was performed for the rats in the experimental surgical group. In the control group, 0.9% NaCl was applied to the ears, whereas in the study groups, topical dexamethasone was applied to the ears. These applications in the control and study groups were repeated for nine days. On the 10th day of the study, the rat ears of all groups underwent otomicroscopic and histologic examinations. The prevalence and process of myringosclerosis were evaluated by otomicroscopic examination, whereas inflammation, membrane thickness, and myringosclerosis intensity were evaluated by histologic examination. Results: The growth of myringosclerosis with otomicroscopic examination was lesser in the study group in which topical dexamethasone was applied than the control and experimental surgical groups. Moreover, it was observed that myringosclerosis effected less quadrants in the study group. Histologic examinations revealed that inflammation was significantly lesser in the study group than in the experimental surgical and control groups. The average membrane thickness values were significantly lesser in the study group than in the experimental surgical group. With respect to myringosclerosis growth, no statistically significant difference was observed among all groups, whereas with respect to myringosclerosis intensity, the rat ears in the study group were less severely affected. Conclusion: Thus, our study results suggest that applying topical dexamethasone after myringotomy has positive effects on limiting the intensity and prevalence of myringosclerosis.
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    The Effects of Experimental Intratympanic Steroid Administration on Organ of Corti Type 1 Spiral Ganglion
    (Georg Thieme Verlag Kg, 2018) Topcuoglu, Turgay; Kocyigit, Murat; Bulut, Erdogan; Ortekin, Safiye G.; Kanter, Mehmet; Yagiz, Recep
    Introduction It is unclear how effective is the intratympanic (IT) steroid treatment on organ of Corti type 1 spiral ganglion, its optimal dosage and frequency of administration. The effect of dexamethasone on cochlear functions in individuals with a normal hearing ability is also unknown. Objective The aim of this study was to evaluate, at the electrophysiological and ultrastructural levels, the effect of IT dexamethasone administration in guinea pigs with normal hearing on organ of Corti type 1 spiral ganglion. Methods A total of 20 guinea pigs ( n =40 ears) whose hearing was detected to be normal by electrophysiological tests were included in the study and randomly divided into 6 groups. Four groups were considered study groups, while 2 groups were considered control groups. Dexamethasone was administered intratympanically in doses of 2 mg/mL and 4 mg/mL in the guinea pigs in the study groups. The animals in the control groups received physiological saline in equal doses as the study groups. All interventions were performed under general anesthesia, and the electrophysiological tests were repeated following the IT injections. Results No statistically significant differences were found among the groups when the IT injections were evaluated in terms of the electrophysiological measurements ( p >0.05). The ultrastructural evaluation showed a cellular mitochondrial increase in the spiral ganglions of the cochlea in the groups in which dexamethasone was administered in a dose of 4 mg/mL. Conclusion According to the findings of this study, it can be suggested that the IT injection of dexamethasone is safe, and when applied in a dose of 4 mg/mL, it increases metabolic activity at the cellular level.
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    The results of tracheotomy in patients with prolonged intubation
    (Ekin Tibbi Yayincilik Ltd Sti-Ekin Medical Publ, 2008) Tas, Abdullah; Yagiz, Recep; Topcuoglu, Turgay; Kocyigit, Murat; Uzun, Cem; Karasalihoglu, Ahmet Rifat
    Objectives: We evaluated early and late complications of tracheotomy in patients who underwent tracheotomy for prolonged entubation. Patients and Methods: This retrospective study included 227 patients (124 males, 103 females; mean age 47.2 years; range 3 to 85 years) who underwent tracheotomy for prolonged entubation during hospitalization at Reanimation and Intensive Care Unit, Coronary Intensive Care Unit, Cardiovascular Surgery Intensive Care Unit, Neurology Unit, and Chest Diseases Unit. There were 10 children and 217 adult patients. Patients who underwent tracheotomy for upper airway obstruction were excluded. Results: The mean duration of intubation was 10.4 days (range 9 to 13 days). Early complications included hemorrhage (n=15, 6.6%) and subcutaneous emphysema (n=3, 1.3%), and late complications included laryngotracheal stenosis (n=2, 3.2%) and difficult decannulation (n=1, 1.6%). Mortality due to tracheotomy did not occur. Conclusion: Establishing a tracheotomy in patients with prolonged intubation is a reliable surgical procedure with low complication risk, providing a safe ventilatory respiration.