Publications by authors named "Yalcınkaya A"

The etiology of cognitive decline linked to migraine remains unclear, with a growing recurrence rate and potential increased dementia risk among sufferers. Cognitive dysfunction has recently gained attention as a significant problem among migraine sufferers that can be related to alterations in hippocampal function and structure. This study explores hippocampal subfield connectivity and volume changes in migraine patients.

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Background And Purpose:  The heterogeneous outcomes used in lower-limb lengthening surgery (LLLS) complicate evidence synthesis, weakening systematic reviews and clinical recommendations, and reducing research impact. This scoping review maps the outcomes and outcome measurement instruments (OMIs) used in LLLS.

Methods: This pre-registered review systematically identified studies reporting outcomes in adults or children who underwent LLLS.

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Objective: Chronic venous insufficiency (CVI) is a common condition affecting more than one-half of the general population, with approximately 20% of cases being bilateral. The high prevalence, diagnosis, and treatment costs, along with the negative impact on patients' quality of life, underscore its significance. This study evaluates the clinical outcomes, quality-of-life effects, and postoperative complications of simultaneous and staged bilateral radiofrequency ablation (RFA) in patients with bilateral CVI in the great saphenous vein at Clinical, Etiological, Anatomical, Pathophysiological stages 2 to 4.

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While Coronavirus disease 2019 (COVID-19) vaccines have proven to be both effective and generally safe, rare but severe adverse events following immunization (AEFIs) are described. Autoantibodies to platelet factor-4 are associated with catastrophic thrombotic AEFIs, but comprehensive investigations of other autoantibodies are lacking. We aimed to detect and describe autoantibodies targeting coagulation-related proteins in a population-wide cohort (SWEDEGENE) including AEFIs attributed to COVID-19 vaccines in Sweden.

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Article Synopsis
  • Appendicitis is a common surgical emergency, but there's ongoing concern about the rate of unnecessary surgeries and uncertainty in diagnosis, prompting this study to evaluate existing risk prediction models for appendicitis.
  • The research involved 3,358 adult patients with right iliac fossa pain from 84 centers, focusing on data like clinical findings, diagnostic tests, and rates of unnecessary surgeries, using various risk scoring systems to analyze effectiveness.
  • Results showed that while the Adult Appendicitis Score performed best overall, the RIPASA score was more effective in men; both scoring systems demonstrated strong diagnostic capabilities, but female patients had higher rates of negative appendicectomy and lower surgery rates compared to males.
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Highly efficient Metamaterials are necessary for applications in sensing, communication, etc. Fano resonance and electromagnetically induced transparency-like phenomena are essential for obtaining high Q-factor and sensitive Metamaterials. Employing both numerical simulations and experimental analysis, we investigate the emergence of Fano resonance in cross-resonator Metamaterials facilitated by the conductive coupling between dark and bright resonators.

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Type I interferons act as gatekeepers against viral infection, and autoantibodies that neutralize these signaling molecules have been associated with COVID-19 severity and adverse reactions to the live-attenuated yellow fever vaccine. On this background, we sought to examine whether autoantibodies against type I interferons were associated with adverse events following COVID-19 vaccination. Our nationwide analysis suggests that type I interferon autoantibodies were not associated with adverse events after mRNA or viral-vector COVID-19 vaccines.

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Although sickle cell disease (SCD) and its manifestations have been associated with various lipid alterations, there are a few studies exploring the impact of sphingolipids in SCD. In this study, we determined plasma ceramide (Cer) and sphingomyelin (CerPCho) species and investigated their association with the crisis in SCD. SCD patients (N = 27) suffering from vaso-occlusive crisis (VOC) or acute chest syndrome (ACS) were involved in this study.

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Glaucoma is a leading cause of blindness with no cure, but early treatment and effective monitoring can often slow the progression of the disease. Monitoring of glaucoma is based on the measurement of intra-ocular pressure (IOP) that is a physiological parameter related to the mechanical state and parameters of the eye. Conventionally, diagnosing and assessing the progression of glaucoma is based on the method of measuring IOP discretely at clinics.

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The characteristic steroid skeleton, with its 4-ringed 17-carbon structure, is one of the most recognizable organic compounds in biochemistry. In the presence of a hydroxyl ion bound to the third carbon, this structure is defined as a "sterol" (chemical formula: CHO). The hydroxyl group provides a hydrophilic site for the otherwise hydrophobic molecule, yielding an amphipathic lipid, which is a vital property for cellular function.

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Background: Management of spontaneous intra-abdominal abscess (IAA) in patients with Crohn's disease (CD) with radiologically guided percutaneous drainage (PD) was debated.

Methods: This is a secondary analysis from a multicenter, retrospective cohort study of all the patients with CD who underwent PD followed by surgery at 19 international tertiary centers.

Results: Seventeen patients (4.

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Background: Available guidelines describing the procedural treatment of thrombosed external hemorrhoids (TEH) rely solely on expert opinion. We aimed to compare local excision (LE) and thrombectomy (incision) in terms of treatment success, factors affecting success, and outcomes.

Methods: This was a multicenter, prospective, observational study conducted in eight centers from September 2020 to September 2021.

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OBJECTIVE: Neuropathic pain is regulated by several metabolites of the kynurenine pathway (KYNA-kynurenic acid, and QA-quinolinic acid). Diclofenac exerts analgesic and anti-hyperalgesic effects and also alters KYNA levels, indicating a potential for therapy. We aimed to assess the nociceptive effects of different doses of diclofenac treatment in a rat model of neuropathic pain and to determine potential relationships with KYNA and QA levels (Graphical Abstract).

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Effects of warfarin and new-generation direct oral anticoagulants (DOACs) on thrombus resolution after the treatment of deep vein thrombosis (DVT) are still unknown. The study aimed to investigate the effects of warfarin and DOACs on thrombus resolution after DVT treatment. The study included 666 patients who were diagnosed with femoropopliteal DVT between January 2016 and January 2022 and had complete medical records without missing data.

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Article Synopsis
  • The study investigates antibiotic use in hospitalized patients with acute abdomen, highlighting the conflict between current practices and Danish regional guidelines that recommend limited use of broad-spectrum antibiotics like cephalosporins.
  • Out of 331 patients, more than half received antibiotics, with a significant proportion treated with cephalosporins, especially those diagnosed with acute appendicitis.
  • The findings indicate a need to reinforce antibiotic guidelines to prevent antibiotic resistance, as the high use of cephalosporins contradicts established recommendations.*
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This study aimed to investigate the effects of pharmacomechanical thrombectomy on novel complete blood count parameters in deep venous thrombosis. This retrospective study included 242 patients aged >18 years who were treated for deep venous thrombosis. Patients were grouped as follows: group 1 was accepted as having interventional operations (n = 123) and group 2 was accepted as having only medical advice (n = 119).

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  • Postoperative atrial fibrillation (POAF) is a common issue after cardiac surgery, and this study investigated whether epicardial fat volume (EFV) affects its development in patients undergoing coronary artery bypass graft (CABG).
  • Out of 281 patients included, 67 (23.8%) developed AF post-surgery. The only significant finding was that older patients were more likely to develop AF.
  • The study concluded that there was no significant difference in EFV between those who developed AF and those who did not, indicating that aging was the main factor associated with AF in this context.
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Objective: This study aimed to examine patients with lead poisoning in terms of metabolomic profiles and bioactive lipids (oxysterols and sphingosine 1-phosphate [S1P]) before and after chelation therapy.

Methods: Consent was obtained from 42 individuals diagnosed with lead poisoning and blood and urine samples were collected before and after chelation therapy. The levels of 7-ketocholesterol (7-KC), cholestan-3b,5a,6b-triol (Ctriol), and S1P were measured via LC-MS/MS.

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Purpose: This study aimed to examine the perceptions about community-based mental healthcare centers and nurses who offered services for patients with schizophrenia.

Design And Methods: This qualitative study was conducted on 15 patients who are diagnosed with schizophrenia and received services in two community-based mental health care centers in Turkey.

Findings: Three themes emerged regarding the perceptions about nurses, including perceived patient-nurse relationships, perceived personal features of nurses, and feelings about nurses.

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The aims of this study were to determine the possible relationships between the levels of hemin, hemopexin, acid sphingomyelinase, nitrite/nitrate (NOx), and other parameters in patients with SCD and to assess whether they were associated with vaso-occlusive crises (VOCs) or acute chest syndrome (ACS). Patients with SCD (homozygous or sickle beta-thalassemia) who were confirmed to have VOC or ACS were included. Blood samples were obtained at admission, on the third day of hospitalization, and at steady state.

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Background: In patients with active Crohn's disease (CD), treatment of intra-abdominal abscess usually comprises antibiotics and radiologically guided percutaneous drainage (PD) preceding surgery. The aim of this study was to investigate the risk of postoperative complications and identify the optimal time interval for surgical intervention after PD.

Methods: A multicentre, international, retrospective cohort study was carried out.

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Maximum likelihood (ML) estimators of the model parameters in multiple linear regression are obtained using genetic algorithm (GA) when the distribution of the error terms is long-tailed symmetric. We compare the efficiencies of the ML estimators obtained using GA with the corresponding ML estimators obtained using other iterative techniques via an extensive Monte Carlo simulation study. Robust confidence intervals based on modified ML estimators are used as the search space in GA.

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