Publications by authors named "Onk A"

Background: Preconditioning is one of the most powerful mechanisms preventing the myocardial ischemic damage that occurs during coronary artery bypass grafting.

Objectives: We aimed to investigate the effects of different propofol and/or desflurane administration protocols in terms of the prevention of ischaemia-reperfusion damage.

Material And Methods: Ninety patients, aged > 18 years, American Society of Anesthesiologists (ASA) category III, scheduled to undergo primary elective coronary artery bypass grafting (CABG), were included in the study.

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Article Synopsis
  • This study compares the surgical outcomes of simple discectomy versus unilateral posterior lumbar interbody fusion (PLIF) without pedicle screw support in patients with single segment lumbar disc herniation (LDH).
  • 60 patients were divided into two groups: 40 underwent simple discectomy and 20 received PLIF with double expandable PEEK cages, and outcomes were measured using VAS and ODI scores before and 18 months post-surgery.
  • Results indicated significant improvements in pain for both groups, with better low back pain relief in the PLIF group, which also maintained disc height and achieved an 80% fusion rate without complications.
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Aim: The aim of this study is to present our institutional experience during the management of anesthesia in lung transplantation (LT) surgeries as a definitive surgical treatment option in end-stage lung diseases.

Methods: From a total of 15 patients, lung transplantation was performed as single LT (SLT) in 4 patients (n = 4) and as sequential bilateral LT (BLT) in 11 patients (n = 11). The anesthetic management included; for induction; intravenous ketamine, midazolam at doses of 2 mg/kg, 0.

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We aimed to evaluate the effect of melatonin on oxidative stress and ovarian injury in rats. Twenty-four Sprague-Dawley albino rats were divided into three groups: Group 1 as nondiabetic healthy controls (n = 8), group 2 as nontreated diabetic rats (n = 8) and group 3 as melatonin-treated diabetic rats (n = 8). After overt diabetes was produced by intraperitoneal injection of streptozosin, 20 mg/kg/day of melatonin was given intraperitoneally to group 3 for a week.

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Objective: The study aims to investigate the effects of diabetes mellitus (DM) on ovarian injury and reserve in a rat model.

Study Design: In this prospective experimental study, 16 female Sprague-Dawley albino rats (12 weeks, 220-240 g) were randomly divided into 2 groups. Group 1 included 8 normal healthy rats as controls.

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Background: During coronary artery bypass grafting (CABG), one of the most important complications related to the internal mammary artery (IMA) is perioperative spasm. Nebivolol causes endothelium-dependent vascular relaxation by increasing nitric oxide (NO) release and prevents endothelial dysfunction in long-term use. In our study, we measured the effect of a third generation beta blocker, nebivolol, on the flow dynamics of IMA grafts.

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Objectives: Different surgical strategies have been evolved for the surgical treatment of ruptured sinus of Valsalva aneurysm (RSVA) from simple primary closure to patching of the rupture site by a dual chamber approach. We reviewed our 25-year experience and current literature regarding the efficacy of different surgical approaches.

Methods: A retrospective review identified 55 patients who underwent RSVA repair between 1985 and 2011.

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Aim: Late occlusion of bypass grafts is one of the main issues associated with long-term survival after coronary artery bypass grafting (CABG) surgery. Left coronary system is generally revascularized using arterial conduits, whereas saphenous venous grafts are used for right coronary system. We investigated the prognostic factors that are related to the patency and risk of occlusion of saphenous venous grafts used for revascularization of diseased right coronary arteries.

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The outcomes of 3 different methods of repair of left ventricular pseudoaneurysm after myocardial infarction were analyzed retrospectively. The operations were carried out in 22 patients between 1985 and 2008. Repair procedures included primary closure with Teflon-pledgeted sutures, and Dacron or pericardial patches.

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Case History: We present a case of spinal tuberculosis in a 4-year-old girl that grounds severe vertebral destruction involving four cervical vertebrae and a large abscess with retropharyngeal expansion. Presenting symptoms were neck and right arm pain, torticollis and weakness of the right arm. We drained the abscess and removed the infected bone and reconstructed the cervical spine with a fibular allograft.

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Several recent studies have shown that essential hypertension is associated with increased oxidative stress, which may cause hypertension via enhanced oxidation and inactivation of nitric oxide. In this study, we investigated the malondialdehyde, nitric oxide, and glutathione levels in newly diagnosed essential hypertensive patients and whether or not there was any effect of antihypertensive treatment with angiotensin II type 1 receptor antagonist, losartan or angiotensin converting enzyme inhibitor, enalapril on plasma malondialdehyde, nitric oxide, and glutathione values. We selected 17 patients (F/M: 10/7, mean age: 46.

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Introduction: Intracranial lipomas are rare lesions of developmental origin. They are generally asymptomatic and localized in the midline. However, they may occasionally produce neurological symptoms such as seizures.

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