Publications by authors named "Olgun Y"

Background: This study was designed to assess if thiol-disulfide homeostasis could be used as diagnostic biomarker in noise-induced hearing loss (NIHL) in a laboratory animal model.

Methods: The study was carried out with a total of 28 female albino rats in 4 groups: group 1 (control group) included rats that were not exposed to noise or any study treatment; in group 2, following noise exposure, rats received 2 mg of dexamethasone per kilogram of body weight via the intramuscular route for 5 days; in Group 3, rats were exposed to noise and received a saline solution for 5 days, in a volume (0.15 cc) matched to that of dexamethasone administered in group 2; and in group 4, rats were exposed to noise, and blood samples were collected during the early phase to assess thiol-disulfide homeostasis without administering any treatment.

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Objective: The use of iodinated contrast media (ICM) inevitably increases in conjunction with the growing number of epidural steroid injection (ESI) administrations. The purpose of this study was to investigate the relationship between thyroid functions and ICM exposure through ESI procedures.

Design: This is a prospective observational study.

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Article Synopsis
  • Hearing loss impacts communication and quality of life, and the bone-anchored hearing aid (BAHA) helps by directly stimulating the cochlea through bone conduction.
  • This study compared the effectiveness of two types of BAHA (transcutaneous and percutaneous) in improving hearing performance and subjective auditory abilities among 29 users over 6 months.
  • Results showed both BAHA types led to significant improvements in speech recognition and overall hearing satisfaction without notable differences between them, confirming BAHA's effectiveness in hearing rehabilitation, particularly for those with conductive hearing loss.
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Different organs respond differently to cisplatin (CDDP)-induced toxicity. Oleuropein (OLE) is a natural phenolic antioxidant. The purpose of this study was to determine the potential protective effect of OLE against CDDP-induced ototoxicity by evaluating expression of genes associated with deoxyribonucleic acid (DNA) damage and repair in cochlear cells.

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Background: Dementia encompasses a range of neurodegenerative disorders characterized by cognitive decline and functional impairment. The identification of reliable biomarkers is essential for accurate diagnosis and gaining insights into the mechanisms underlying diseases.

Objective: This study aimed to investigate the plasma biomarker profiles associated with Brain- Derived Neurotrophic Factor (BDNF), Oxytocin, Neuronal Pentraxin-1 (NPTX1), Triggering Receptor Expressed on Myeloid Cells 2 (TREM2), Tumor Necrosis Factor-alpha (TNF-alpha), Interleukin- 1 (IL-1) and Prolactin in Alzheimer's disease (AD), dementia with Lewy bodies (DLB), frontotemporal dementias (FTD) and healthy controls.

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Infantile hemangiomas (IHs) are the most common benign vascular tumors of infancy. We report our experiences with 248 patients with head and neck IHs. The median admission age was 4 months, and the female/male ratio was 2.

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Hearing loss that arises from various causes at different stages of life has a direct impact on individuals' physical and mental well-being. This paper aimed to evaluate the employment, workplace adaptation, productivity, and professional success of individuals who have hearing loss and whose hearing loss is corrected with a cochlear implant. In this cross-sectional study, data were collected between November 2022 and March 2023 with the participation of individuals with cochlear implants living in several settlements in all regions of Türkiye.

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Background: Despite newly developing technologies and techniques, the use of fluoroscopic guidance in spinal interventional treatments remains popular. Therefore, it is essential to set reference standards and techniques for reducing radiation exposure in fluoroscopy-guided procedures.

Objective: The aim of this study was is to compare the radiation doses and procedure time of the contralateral oblique (CLO) view to  lateral view imaging during fluoroscopy-guided spinal procedures.

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Objective: Most neurodegenerative dementias present with substantial overlap in clinical features. Therefore, differential diagnosis is often a challenging task necessitating costly and sometimes invasive diagnostic procedures. A promising, non-invasive and cost-effective method is the widely available electroencephalography (EEG).

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Background: Here, we aimed to investigate the roles of long-term potentiation-like (LTP-like) plasticity using intermittent theta burst (iTBS) protocol and resting motor threshold (rMT) in the differential diagnosis of Alzheimer's disease (AD), diffuse dementia with Lewy bodies (DLB) and frontotemporal dementia (FTD).

Method: We enrolled 21 subjects with AD, 28 subjects with DLB, 14 subjects with FTD, and 33 elderly subjects with normal cognitive functions into the study. We recorded rMT and percentage amplitude change of motor evoked potentials (MEPs) after the iTBS protocol in each group.

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Objective: The efficacy of epidural steroid injections (ESIs) in the treatment of radicular pain in patients undergoing lumbar spinal surgery is still unclear. The aim of this study was to investigate the factors affecting the success of ESIs in the treatment of ongoing radicular pain in patients undergoing lumbar spinal surgery.

Patients And Methods: This study was designed as a single-center, retrospective study, and was conducted at a Pain Management Center of a tertiary care center.

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Objective: This study aims to evaluate the effects of bevacizumab and propranolol from the point of view of a possible antiangiogenic effect in a model of primary nasal polyp (NP) tissue culture.

Methods: NP samples of 21 patients and normal healthy nasal mucosa samples of 7 patients were cultured. Samples were divided into four groups as follows (healthy nasal mucosa, NP without any treatment, NP treated with propranolol, NP treated with bevacizumab).

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Objective: Our primary objective was to develop a three-dimensional (3D) model of the vestibular labyrinth to understand the pathophysiological mechanisms of benign paroxysmal positional vertigo (BPPV) observed during common diagnostic positional tests. We secondarily aimed to monitor the effects of the repositioning maneuvers and use this tool in teaching.

Methods: A 3D model of a human semicircular canals (SSCs) system was created by 3D printing the core and assembling it with silicone tubing filled with lubricant oil containing colored small stones in the lumen mimicking otoconia.

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Background: This study aimed to compare the cytotoxic, cytostatic, and ototoxic effects of lipoplatin compared to cisplatin application in the subcutaneous xenograft nude mouse neuroblastoma tumor model.

Methods: In this study, C1300 neuroblastoma cells were administered subcutaneously to 21 male nude mice. When the tumor reached 150 mm3 diameter, mice were randomized into 3 groups.

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Background: To investigate the possible protective activity of oleuropein compound on noise-induced hearing loss in rats.

Methods: Twenty-eight adult male albino rats were divided into 4 groups. Control normal saline (n=7) group was kept noise-free.

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Objective: Noise-induced hearing loss (NIHL) is one of the most important problems affecting both social and professional life of patients. There is no treatment method considered to be successful on the hearing loss that has become a permanent nature. Aim of this study is to evaluate protective effect of Korean Red Ginseng (KRG) against NIHL in an animal model.

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Objective: The aim of this study was to determine whether prophylactic darbepoetin alpha and/or topiramate administration could prevent bilirubin neurotoxicity (BNTx) in experimental model of kernicterus.

Materials And Methods: A total of 60 Wistar albino rat puppies with experimental kernicterus model were included in the study. The Kernicterus was established administering a bilirubin injection via a cisterna magna puncture 30 minutes after ip drug injection.

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The aim of this study is to evaluate risk factors contributing to the development of ototoxicity in children who received platinum-based chemotherapy for malignancies located in the head and neck region. Eighty-four children who received platinum-based chemotherapy were included. Audiologic evaluations were performed before and after each chemotherapy session through pure tone audiometry, distortion product otoacoustic emissions, and auditory brainstem response tests.

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Objectives: To review the ocular abnormalities in children treated with cochlear implant.

Materials And Methods: A total of 51 children (29 boys, 22 girls) who were under 18 years old, presented previously with severe to profound hearing loss, and underwent cochlear implantation surgery were included in this study prospectively. A detailed ophthalmic examination, including refraction, best corrected visual acuity, ocular motility, slit-lamp biomicroscopy, and dilated fundus examination, was performed for each patient.

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Objective: To evaluate the incidence of vascular canal variations in the pediatric cochlear implant (CI) candidates.

Methods: We retrospectively reviewed temporal bone computed tomography (CT) images of the CI candidates between November 2013 and November 2018. The presence of high riding jugular bulb, dehiscent jugular bulb, jugular bulb diverticulum, bulging of sigmoid sinus, mastoid emissary vein (MEV), carotid canal dehiscence, and aberrant internal carotid canal were evaluated.

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Introduction: Sialolipoma is an extremely rare salivary gland tumor characterized by a well circumscribed mass composed of glandular tissue and mature adipose elements. Herein our aim was to present the fifth case of congenital sialolipoma, which was firstly followed up as a parotid gland hemangioma, and underline the fact that sialolipomas should be kept in mind in the differential diagnosis of congenital parotid gland masses.

Case Report: A 10-month old male presented with a left-sided huge neck mass which progressed after birth.

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Purpose: The aim of the present study was to evaluate the effect of acetyl-l-carnitine (ALC) and N-acetyl cysteine (NAC) on ionizing radiation (IR)-induced cytotoxicity and change in DNA damage-related genes in House Ear Institute-Organ of Corti 1 (HEI-OC1) cells.

Methods: HEI-OC1 cells were irradiated with 5 Gy radiation and treated by eight combinations of NAC and/or ALC: control, NAC, ALC, IR, NAC + IR, ALC + NAC, ALC + IR, and ALC + NAC + IR. Cell viability, apoptotic cell death, and DNA damage were measured at the 72nd hour.

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Myxoma is a benign connective tissue tumor that arises mostly from the heart. Temporal bone myxomas are extremely rare and these patients should be evaluated for the Carney complex association. Herein, our aim was to present a middle ear myxoma case operated with an initial diagnosis of chronic otitis media (COM) and to underline the fact that myxomas should be kept in mind in the differential diagnosis of aural polyps.

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Objective: The aim of this study was to investigate and compare the auditory findings in vestibular migraine (VM) and migraine patients without a history of vertigo.

Methods: This study was conducted on 44 patients diagnosed with definite VM and 31 patients diagnosed with migraine who were followed and treated between January 2011 and February 2015. Also, 52 healthy subjects were included in this study as a control group.

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