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Dive into the research topics where Kenan Ahmet Turkdogan is active.

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Featured researches published by Kenan Ahmet Turkdogan.


International Journal of Infectious Diseases | 2012

C-type natriuretic peptide is associated with the severity of Crimean-Congo hemorrhagic fever

Kenan Ahmet Turkdogan; Aynur Engin; Fatma Mutlu Kukul Güven; Muhammed Mirhan Polat; Okan Onur Turgut; Mehmet Birhan Yilmaz

BACKGROUND Crimean-Congo hemorrhagic fever (CCHF) is characterized by vascular dysfunction, indicating the involvement of endothelial cells. C-type natriuretic peptide (CNP) plays a critical role in the coordination of vascular tone and is associated with the prognosis in critically ill patients such as those with sepsis and septic shock. We investigated whether CNP is related to the severity of CCHF. METHODS Forty-eight consecutive patients with a laboratory confirmed diagnosis of CCHF and 40 age-sex-matched healthy volunteers as the control group were prospectively enrolled into the study. CCHF patients were classified according to the disease severity into a non-severe group (n=28) and a severe group (n=20). RESULTS The CNP levels were detected to be 0.43 (0.4-0.7) ng/ml in the control group, 0.87 (0.7-1.0) ng/ml in the non-severe CCFH group, and 1.27 (0.8-1.7) ng/ml in the severe CCHF group. According to the receiver operating characteristics curve analysis, the optimal cut-off value of CNP to predict disease severity was >1.22 ng/ml, with 89.3% specificity and 55% sensitivity. CNP >1.22 ng/ml, lactate dehydrogenase >480 IU/l, and aspartate aminotransferase >202 IU/l were found to have prognostic significance in the univariate analysis. In the multivariate logistic regression analysis by forward stepwise method, CNP >1.22 ng/ml (odds ratio 8.336, p = 0.016) and lactate dehydrogenase >480 IU/l (odds ratio 16.206, p = 0.002) remained associated with disease severity after adjustment for confounding variables. CONCLUSIONS CNP measurement could help in the risk stratification of patients with CCHF.


The Pan African medical journal | 2015

EUS-guided FNA of a portal vein thrombus in hepatocellular carcinoma

Yusuf Kayar; Kenan Ahmet Turkdogan; Birol Baysal; Nurcan Unver; Ahmet Danalioglu; Hakan Senturk

Portal vein thrombosis is a relatively rare but well-known complication of cirrhosis that has a prevalence of between 1% and 5.7%. On the contrary, in case of hepatocellular carcinoma (HCC), it is a much more frequent complication. In this paper, we presented three cases that had liver cirrhosis, mass and portal vein thrombosis in liver. We were not able to diagnose the cases through imaging methods, laboratory results or histopathologically, however, they were diagnosed with endoscopic ultrasonography- fine needle aspiration EUS-FNA from portal vein thrombus.


Anatolian Journal of Cardiology | 2015

Association between oxidative stress index and post-CPR early mortality in cardiac arrest patients: A prospective observational study.

Hasan Yucel; Kenan Ahmet Turkdogan; Hüseyin Aydın; Recep Kurt; Mehmet Yilmaz

Objective: Cardiopulmonary resuscitation (CPR) is a series of lifesaving actions that improve the chance of survival following cardiac arrest (CA). Many clinical and laboratory parameters, such as the presence of asystole, out-of-hospital CPR, and duration of cardiac arrest, are associated with failed CPR in patients with CA. Asystole is a state of no cardiac electrical activity, along with the absence of contractions of the myocardium and absence of cardiac output. Oxidative stress index (OSI), which is the ratio of total oxidative status to total antioxidant status, increases by ischemia-reperfusion injury. We investigated whether OSI levels in patients with CA could predict early mortality after CPR. Methods: This study has a prospective observational cohort design. Five patients with a history of cancer, four patients who developed hemolysis in their blood, six patients who were transferred to our hospital from other hospitals, and six patients in whom blood samples for OSI could not be stored properly were excluded. Finally, a total of 90 in-hospital or out-of-hospital CA patients and 40 age- and sex-matched healthy volunteers as the control group were evaluated prospectively. The patients were classified according to the CPR response into a successful group (n=46) and a failed group (n=44). Comparisons between groups were performed using one-way ANOVA with post hoc analysis by Tukey’s HSD or independent samples t-test and the Kruskal-Wallis tests or Mann-Whitney U test for normally and abnormally distributed data, respectively. Also, we used chi-square test, Spearman’s correlation test, univariate and multible logistic regression analyses, and receiver operator characteristic curve analysis. Results: OSI was 3.0±4.0, 5.6±4.3, and 8.7±3.8 in the control group, the successful CPR group, and the failed CPR group, respectively (p<0.001 for the 2 comparisons). OSI on admission, ischemia-modified albumin, presence of asystole, mean duration of cardiac arrest, out-of-hospital CPR, pH, and potassium and sodium levels were found to have prognostic significance in the univariate analysis. In the multivariate logistic regression model, OSI on admission (OR=1.325, p=0.003), ischemia-modified albumin (OR=1.008, p=0.005), presence of asystole (OR=13.576, p<0.001), and sodium level (OR=1.132, p=0.029) remained associated with an increased risk of early mortality. In addition, the optimal cut-off value of OSI to predict post-CPR mortality was measured as >6.02, with 84.1% sensitivity and 76.1% specificity. Conclusion: Elevated OSI levels can predict failed CPR in CA patients.


Angiology | 2014

Mean Platelet Volume in Patients With Carbon Monoxide Poisoning

Mustafa Karabacak; Ercan Varol; Kenan Ahmet Turkdogan; Ali Duman; Orhan Akpınar; Pınar Karabacak

Carbon monoxide (CO) poisoning is frequent and can lead to high morbidity and mortality. Some studies have indicated increased platelet activation and aggregation in CO poisoning. Thus, we investigated mean platelet volume (MPV), an indicator of platelet activation, in patients with CO poisoning. We included 193 (117 women) patients who presented with a diagnosis of CO poisoning between June 2011 and March 2013. Control group was composed of 39 (15 women) patients. Troponin and creatine kinase MB levels were significantly higher in the CO poisoning group. Platelet counts were significantly higher in patients with CO poisoning (281 ± 76 vs 248 ± 65 × 109, respectively; P = .01). Similarly, MPV was significantly higher in the CO poisoning group (8.9 ± 0.8 vs 7.9 ± 0.9 fL, respectively; P < .001). Elevated MPV values may indicate that patients with CO poisoning have a higher risk of thromboembolic and cardiovascular complications due to platelet activation.


Clinical Hemorheology and Microcirculation | 2016

Is signal peptide-CUB-EGF domain-containing protein1 a diagnostic biomarker in patients with hypertensive crises

Mustafa Karabacak; Mehmet Yigit; Kenan Ahmet Turkdogan; Eda Yigit; Sehabettin Selek

BACKGROUND Platelet activation might play a significant role in the pathophysiology of cardiovascular and cerebrovascular events in hypertension (HT). Signal peptide-CUB-EGF domain-containing protein1 (SCUBE1), an indicator of platelet activation, is increased in HT. The aim of this study was to investigate the SCUBE1 in patients with hypertensive crises. METHODS This study included 33 hypertensive urgency (HU) and 39 hypertensive emergency (HI) patients admitted to our emergency department with a diagnosis of hypertensive crisis. Platelet activation was evaluated with biochemical markers such as SCUBE1, soluble CD40L (sCD40L), mean platelet volume, and platelet count. RESULTS The SCUBE1 values of the HE patients were significantly higher than other groups (1.09 ± 0.49, 0.71 ± 0.23 and 0.37 ± 0.02 ng/dl, respectively; p <  0.01). The sCD40L values were higher in the hypertensive crises compared with the control group (4.16 ± 1.82, 3.41 ± 1.76 and 1.76 ± 0.68 ng/ml, respectively; p <  0.01). More importantly, SCUBE1 had high sensitivity and specificity in the detection of target organ damage. CONCLUSION In present study showed that SCUBE1 was significantly higher in HE patients. In addition, sCD40L level, presence of diabetes, and systolic blood pressure were independently associated with increased SCUBE1. According to our results, SCUBE1 might be a diagnostic biomarker in hypertensive crisis patients.


American Journal of Emergency Medicine | 2015

The diagnostic role of signal peptide–C1r/C1s, Uegf, and Bmp1–epidermal growth factor domain-containing protein 1 in non–ST-elevation acute coronary syndrome

Ertan Sonmez; Kenan Ahmet Turkdogan; Mustafa Karabacak; Cemil Civelek; Cahit Yilmaz; Omer Faruk Ozer; Umut Yücel Çavuş

OBJECTIVE Chest pain and/or electrocardiogram changes in non-ST elevation or suspicious chest pain and cardiac marker elevations are defined as non-ST-elevation acute coronary syndrome (NSTE-ACS). Serial electrocardiogram and marker follow-up are needed to make a diagnosis of NSTE-ACS and to eliminate noncoronary chest pain (NCCP). Signal peptide-C1r/C1s, Uegf, and Bmp1-epidermal growth factor domain-containing protein 1 (SCUBE1) is stored within the α granules of inactive platelets and secreted at a high rate during thrombosis. We believe that SCUBE1 may be a sensitive early diagnostic indicator in distinguishing coronary-induced chest pain from noncoronary-induced chest pain. MATERIALS AND METHODS The study included 190 patients with an initial diagnosis of acute coronary syndrome in the emergency department. Based on a definitive diagnosis, these patients were classified into 3 groups: ST-elevation myocardial infarction (STEMI), NSTE-ACS, and NCCP. RESULTS Plasma SCUBE1 levels were significantly higher in the STEMI group when compared with those of the other groups (P < .05). They were also significantly higher in the NSTE-ACS group when compared with those of the NCCP group (P < .01). Troponin I, creatinine kinase, and creatinine kinase MB levels were significantly different in the NSTE-ACS group when compared with those of the NCCP group (P < .05). CONCLUSION High rates of SCUBE1 were found both in the STEMI and NSTE-ACS patients. Furthermore, in the study group, SCUBE1 was an adequate marker for distinguishing NSTE-ACS from NCCP.


Journal of Clinical and Experimental Investigations | 2013

Bir Devlet hastanesi acil servisi demografik özellikleri: 2011 yılı meta analizi

Kenan Ahmet Turkdogan; Mucahit Kapci; Orhan Akpınar; Ali Duman; Gülçin Bacakoğlu; Figen Tunali Turkdogan; Mustafa Karabacak; Şevki Hakan Eren; Abuzer Coskun

Objective: The examination and treatment modalities should be measurable for improve the service quality of emergency service. This may be possible with the data collection system which is comprehensive and world-wide known. The aim of this study is to investigate the demographical features of patients who admitted to our service by computer based patient recording system and create a better service quality in the view of these data. Methods: Registered 115,185 patients were included whom admitted to our service between January 2011 and December 2011. The demographic characteristics, symptoms, triage distributions, the average length of stay, consultation rates, hospital admission forms, hospitalization and discharge rates were classified according to the Inter national Classification of Diseases-10 (ICD-10). Results: The mean age of patients was 38.70±19.92 years and 44.8% of the patients were male. Triage categories of the patients in category red, yellow and green 5.5%, 53.1%, 41.4%, respectively. Patients older than 65 years old were 14,643 (12.7%). Most common presentation day was Monday and the time period was between 20 p.m. and 24 p.m. The mean length of emergency service stay was 47 minutes, consultation and admission rates were 8.5% and 3.2%, respectively. 1,876 patients of older than 65 years old were admitted to the services. Conclusions: Emergency service admission registrations should be stored and analyzed by using the digital and sharable systems to serving a better qualified service in emergency services which provides continued service step to health care. This will allow the national standardization and determine the international location. J Clin Exp Invest 2013; 4 (3): 274-278


The Pan African medical journal | 2015

Concurrent acute pancreatitis and pericardial effusion

Yusuf Kayar; Kenan Ahmet Turkdogan; Birol Baysal; Nigar Gultekin; Ahmet Danalioglu; Ali T. Ince; Hakan Senturk

While pleural effusion and ascites secondary to acute pancreatitis are common, clinically relevant pericardial effusion and cardiac tamponade are observed rarely. In a study by Pezzilli et al., pleural effusion was noted in 7 of the 21 patients with acute pancreatitis whereas the authors detected pericardial effusion development in only three. The authors asserted that pleural effusion was associated with severe acute pancreatitis, while pericardial effusion and the severity of acute pancreatitis were not significantly related.


Blood Coagulation & Fibrinolysis | 2015

The efficacy of absorbable polysaccharide haemostats in wound healing.

Ertan Sonmez; Kenan Ahmet Turkdogan; Cemil Civelek; Ali Dur; Bedia Gulen; Eda Karayel; Zuhal Gucin; Ozgur Sogut

Wound healing represents an ancient problem for humans, and various materials and methods have been tried for wound dressing. A dressing should protect against infection and shorten healing; moreover, it should not cause tissue damage and should be nonallergenic, cost effective and easy to apply. These are characteristics that may be found in herbal extracts. An absorbable polysaccharide haemostat (APH) is a plant-based haemostatic agent. We aimed to evaluate the effect of APH on wound healing. A total of 24 Wistar rats were divided into three groups, each consisting of eight rats. We generated triangular tissue defects on the dorsal regions of the rats. The wound size of each rat was drawn on acetate paper on the 3rd, 7th and 14th days and dressed with APH, saline and wheat meal. Wound healing rates were calculated using planimetric software. Scar tissue excision was performed on the 14th day and histopathological examination was carried out. The mean wound contraction rate was statistically higher in the APH group than in the wheat meal and saline groups on the 14th day (P < 0.05). There was no significant difference in polymorphonuclear leukocytes intensity between the saline and APH groups when stained with haematoxylin and eosin (P > 0.05). However, the intensities of fibroblasts (P < 0.01), vascular proliferation (P = 0.01) and inflammatory score (P = 0.02) were significantly different in the saline and APH groups. APH has favourable effect on wound healing. In addition to its blood-stopping effect, APH may be useful for tissue defects, which arise after trauma or surgical procedures.


The Pan African medical journal | 2014

Coffee bean sign, whirl sign and bird's beak sign in the diagnosis of sigmoid volvulus.

Mehmet Yigit; Kenan Ahmet Turkdogan

The patient, a 28-year-old man who had presented to our Emergency Department (ED) with constant abdominal pain and distension for one day, had no previous medical or surgical history. He denied that he had any nausea, vomiting, diarrhea or constipation. At admission, his physical examination revealed hypertension (TA: 152/97 mmHg) and a distended abdomen with generalised tenderness and hypoactive bowel sounds. There was no fever, abdominal guarding, rebound or rigidity. Laboratory results were within normal limits. A plain radiograph of the abdomen revealed a “coffee bean” sign. We also observed an impressive picture of a typical “whirl” sign and a “bird’s beak” sign on an emergent abdominal computed tomography (CT) scan. Also, his CT scan revealed marked distension and a twisted loop of sigmoid colon. Sigmoid volvulus (SV) was diagnosed rapidly with these characteristic radiological signs. Subsequently, with flexible sigmoidoscopy, the patient was successfully decompressed and detorsioned. SV is potentially life-threatening and requires emergency intervention. It is the third leading cause of colon obstruction in adults after cancer and diverticulitis. The primary emergency therapy for uncomplicated SV is endoscopic detorsion and decompression. Emergency physicians in particular should be aware of the typical radiographic CT signs, “coffee bean,” “whirl” and “bird’s beak,” which are indicative of SV and which will allow them to easily diagnose this condition in cases of acute abdominal obstruction. If emergency physicians delay diagnosis, the patients might require emergency surgical intervention.

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Ali Duman

Adnan Menderes University

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Mucahit Kapci

Adnan Menderes University

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Orhan Akpınar

Süleyman Demirel University

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Mustafa Karabacak

Süleyman Demirel University

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Mücahit Avcil

Adnan Menderes University

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Bekir Dagli

Adnan Menderes University

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