Publications by authors named "Demirtas H"

This study presents a graphene field-effect transistor (gFET) biosensor with dual detection capabilities for SARS-CoV-2: one RNA detection assay to confirm viral positivity and the other for nucleocapsid (N-)protein detection as a proxy for infectiousness of the patient. This technology can be rapidly adapted to emerging infectious diseases, making an essential tool to contain future pandemics. To detect viral RNA, the highly conserved E-gene of the virus was targeted, allowing for the determination of SARS-CoV-2 presence or absence using nasopharyngeal swab samples.

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This is the first study to examine the role of monocyte distribution width (MDW) in predicting sepsis after cardiovascular surgery. This study included 43 consecutive patients who had undergone cardiovascular surgery between July 2021 and July 2022. All patients were examined at the following three time points (TPs): preoperative period (TP1), postoperative at 24 h (TP2), and discharge (TP3).

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Titanium-Niobium (TiNb) alloys are commonly employed in a number of implantable devices, yet concerns exist regarding their use in implantology owing to the biomechanical mismatch between the implant and the host tissue. Therefore, to balance the mechanical performance of the load-bearing implant with bone, TiNb alloys with differing porosities were fabricated by powder metallurgy combined with spacer material. Microstructures and phase constituents were characterized with energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), and X-ray diffraction (XRD).

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Objective: This study aimed to demonstrate whether ozone has cardioprotective effects on the myocardial ischemia-reperfusion injury (IRI) in rats with streptozotocin(STZ)-induced diabetes.

Methods: A total of 38 male Wistar Albino rats were divided into five groups as follows: control group (group C,=6), diabetic group (group D,=6), diabetic ozone group (group DO,n=6), diabetic-ischemia/reperfusion (group DIR,=6), diabetic-ischemia/reperfusion-ozone (group DIRO,=6). Six rats died during this period and two died because of surgical complications.

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Introduction: Ischemia-reperfusion (IR) injury is a major concern that frequently occurs during vascular surgeries. Hydrogen-rich saline (HRS) solution exhibits antioxidant and anti-inflammatory properties. This study aimed to examine the effects of HRS applied before ischemia in the lungs of rats using a lower extremity IR model.

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Background: A coronary artery bypass graft procedure reduces mortality for cardiovascular patients, but those undergoing it often face negative body perception, loss of daily activities, and lingering symptoms, hindering full functional recovery and comfort.

Aim: To compare the comfort level, activities of daily living, and body image based on certain characteristics of patients at baseline, (ii) Evaluate changes over time in levels of discomfort, activities of daily living, body image, and cardiac symptoms before and after CABG surgery within three months.

Method: This descriptive prospective cohort study comprised 50 patients scheduled for coronary artery bypass surgery.

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Objective: the objective of this study is to examine the relationships between sleep, quality of life and anxiety in patients undergoing cardiac surgeries during the preoperative period, at discharge, two weeks after discharge and three months after discharge.

Method: this study had a prospective, descriptive and correlational design and was conducted in a single center. The sample consisted of 68 patients who had undergone cardiac surgeries.

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Constrictive pericarditis is quite rare complication of messenger ribonucleic acid-based severe acute respiratory syndrome-Coronavirus 2 (SARS-CoV-2) vaccine. It is a severe clinical picture with clinical symptoms of right ventricular failure. Initial physical examination, laboratory work-up, and chest X-ray may yield non-specific findings.

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Objective: We aimed to investigate antiplatelet drug resistance utilizing light transmission-lumiaggregometry (LT-LA) and the Platelet Function Analyzer-100 (PFA-100) in patients undergoing cardiovascular surgery.

Materials And Methods: The study included 60 patients diagnosed with stable coronary artery disease and peripheral vascular diseases that required surgery. Participants were divided into three groups: patients receiving aspirin (ASA) (n=21), patients receiving clopidogrel (CLO) (n=19), and patients receiving dual therapy (ASA+CLO) (n=20).

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Renal artery stenosis is one of the common vascular diseases that cause hypertension in children. However, renal artery aneurysms and abdominal aortic aneurysms, which may be components of mid-aortic syndrome, are rarely associated with renal artery stenosis. Despite its rarity, early diagnosis and treatment are critical to prevent fatal complications.

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This study investigated the microstructures, mechanical performances, corrosion resistances, and in vitro studies of porous Ti-xNb-10Zr (x: 10 and 20; at. %) alloys. The alloys were fabricated by powder metallurgy with two categories of porosities, i.

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Background: Lead can be present in drinking water in soluble and particulate forms. The intermittent release of lead particulates in drinking water can produce highly variable water lead levels (WLLs) in individual homes, a health concern because both particulate and soluble lead are bioavailable. More frequent water sampling would increase the likelihood of identifying sporadic lead "spikes," though little information is available to aid in estimating how many samples are needed to achieve a given degree of sensitivity to spike detection.

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Aim: This study aimed to determine nurses' views of their competence in disaster nursing management.

Background: It is an important responsibility of nurses to have the necessary knowledge and skills for the management of disasters and to be prepared for disasters. For this responsibility to be effectively demonstrated, it is important to determine the disaster management competencies of the nurses.

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Purpose: This study aimed to assess the prevalence of poor sleep quality and to describe its predictors in diabetic patients having chronic venous insufficiency and varicose veins treated with cyanoacrylate glue.

Methods: This single-center, prospective cohort study was conducted between March 2018 and March 2021. A total of 103 patients with diabetes mellitus and chronic venous insufficiency (CEAP classification at stages C3-C6) treated with cyanoacrylate glue for varicose veins were recruited.

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Which country, politician, or policy is more of a cause of the Covid-19 pandemic death toll? Which of the two factories causally contributed more to the pollution of the nearby river? A wide-ranging portion of our everyday thought and talk, and attitudes rely on a graded notion of causation. However, it is sometimes highlighted that on most contemporary accounts, causation is on-off. Some philosophers further question the legitimacy of talk of degrees of causation and suggest that we avoid it.

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Objectives: We assessed the hearing level, sleep quality, depression status, and life quality of the employees.

Methods: The research group contains 380 (56.7%) of 669 employees working in the factory.

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Background: This case study describes research, which is located in Turkey, where more than 750,000 Syrian refugees reside autonomously in Istanbul. The research developed and pilot tested a novel model for helping urban refugee families with limited to no access to evidence-based mental health services, by delivering a transdiagnostic family intervention for common mental disorders in health and non-health sector settings using a task-sharing approach. This case study addresses the following question: What challenges were encountered in developing and piloting a low intensity trans-diagnostic family support intervention in a humanitarian emergency setting?

Discussion: The rapidly growing scale of humanitarian crises requires new response capabilities geared towards addressing populations with prolonged high vulnerability to mental health consequences and limited to no access to mental health, health, and social resources.

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Objective: The clinical indication of chronic venous insufficiency (CVI) is related to functional performance and the benefits of physical activity in patients with CVI are known. Despite its importance, the literature is limited in this regard. This study aimed to determine exercise capacity and physical activity level in patients with varicose veins and CVI.

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In clinical development, there is a trade-off between investment and level of confidence in the potential of the drug before going into phase III. Reduced investment requires the use of short-term endpoints. On new compounds, only limited information about the relationship between treatment effects of short- and long-term endpoints is usually available.

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Our primary objective was to examine external hip joint moments during walking in people with mild radiographic hip osteoarthritis (OA) with and without symptoms and disease-free controls. Three groups were compared (symptomatic with mild radiographic hip OA, n = 12; asymptomatic with mild radiographic hip OA, n = 13; OA-free controls, n = 20). Measures of the external moment (peak and impulse) in the sagittal, frontal and transverse plane during walking were determined.

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Background And Aim: Technological developments and enhancement of knowledge level enable heart surgery with low mortality rates in most centers. On the other hand, increased systemic inflammatory response against cardiopulmonary bypass (CPB) plays a critical role in the development of postoperative complications. We aimed to compare the effects of centrifugal pump where it is claimed that blood is exposed to minimal trauma and roller pump techniques on inflammatory response and oxidant status during CPB.

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Background/aim: The protective effect of erdosteine on local and distant organ injury due to ischemia/reperfusion has been well documented but its effect on erythrocyte deformability needs further investigation. Our aim was to investigate the effect of erdosteine on erythrocyte deformability in the infrarenal aorta of rats undergoing ischemia/reperfusion. Materials and methods: Our study was conducted with 18 Wistar albino rats.

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Aim/introduction: Analgesic, anti-inflammatory and anti-apoptotic effects of pregabalin have been shown previously. In this study, we investigated the protective effect of different doses of pregabalin on skeletal muscle IR injury in rats.

Materials And Methods: 24 rats were randomly divided into 4 groups (Control, Ischaemia-Reperfusion (IR), IR-Pregabalin 50 mg, IR-Pregabalin 200 mg).

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This article discusses marginalization of the regression parameters in mixed models for correlated binary outcomes. As is well known, the regression parameters in such models have the "subject-specific" (SS) or conditional interpretation, in contrast to the "population-averaged" (PA) or marginal estimates that represent the unconditional covariate effects. We describe an approach using numerical quadrature to obtain PA estimates from their SS counterparts in models with multiple random effects.

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