Person: AK, KORAY
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
AK
First Name
KORAY
Name
43 results
Search Results
Now showing 1 - 10 of 43
Publication Metadata only The relationship between platelet glycoprotein IIb RS5911 polymorphism and inflammation in COPD patients(PERGAMON-ELSEVIER SCIENCE LTD, 2012) AK, KORAY; Altinoz, Hilal; Ergun, Samet; Ak, Koray; Uyguner, Zehra Oya; Yardimci, Turay; Tetik, SerminPublication Open Access Huge thrombosed popliteal artery aneurysm(2023-09-29) DEMİRBAŞ, ELİF; AK, KORAY; DEMİRBAŞ E., AK K.Popliteal artery aneursyms (PAA) are the most common true peripheral aneurysm. We report a case of 66-year-old patient who has pulsatile mass posterior of the right knee diagnosed with massive PAA.Publication Metadata only The effects of tacrolimus on the activity and expression of tissue factor in the rat ovary with ischemia-reperfusion induced injury(INST ANIMAL REPRODUCTION FOOD RESEARCH, 2015) ALTURFAN, EBRU IŞIK; Ustundag, Unsal Veli; Sahin, Sadik; Ak, Koray; Keskin, Ilknur; Emekli-Alturfan, EbruIn the present study, the effects of tacrolimus on the activity and expression of tissue factor (TF) were investigated in the ovarian ischemia-reperfusion induced injury in rats. Twenty-eight female rats (8-12 weeks, 300-350 g) were divided into four groups: control, ischemia-reperfusion (IR), tacrolimus treated before ischemia (TBI), and tacrolimus treated before reperfusion (TBR) groups (n = 7/per group). TF activity was measured using Quick's method, whereas TF expression was examined immunohistochemically. TF activity was significantly higher in all treated groups compared with the control group. Strong ovarian TF expression was demonstrated in the IR and TBR groups. Moreover, tacrolimus decreased TF activity in the TBI group compared with the IR group. The decreased activity of TF in the ovarian IR model may prevent IR-related inflammation during transplant procedure. (C) 2015 Society for Biology of Reproduction & the Institute of Animal Reproduction and Food Research of Polish Academy of Sciences in Olsztyn. Published by Elsevier Sp. z.o.o. All rights reserved.Publication Open Access Surgical treatment of massive pulmonary thromboembolism due to renal cell carcinoma(2022-07-01) AK, KORAY; ÖZTÜRK, FATİH; ARSAN, SİNAN; Erol M. E., AK K., ÖZTÜRK F., TİNAY İ., ARSAN S.While renal cell carcinomas frequently invade the renal vein and inferior vena cava, the right atrial extension or formation of bilateral pulmonary massive embolism is quite unusual. A 65-year-old male patient underwent bilateral pulmonary tumor endarterectomy and total thrombectomy of the inferior vena cava combined with left nephrectomy under total circulatory arrest with antegrade cerebral perfusion. Both mediastinal and abdominal approaches facilitated the complete removal of the caval thrombus under the guidance of transesophageal echocardiography. The patient is still under follow-up for six months without metastasis. In conclusion, pulmonary thromboembolism due to renal cell carcinoma is rare, surgical treatment is possible.Publication Metadata only Clinical Experience Receiving ECMO for Acute Respiratory Distress Syndrome(AVES, 2017) AK, KORAY; Eryuksel, Emel; Yalcin, Aslihan; Guven, Pinar; Turan, Can; Yildizeli, Sehnaz Olgun; Ispir, Selim; Ak, Koray; Karakurt, SaitAcute respiratory distress syndrome (ARDS) is characterized by pulmonary edema caused by sudden increase in alveolocapillary membrane permeability, hypoxemia, and bilateral lung infiltration. Despite improvement in ICU treatment modalities, the mortality rate among ARDS patients is still considerably high. In the treatment of ARDS, in addition to the treatment of underlying cause, low-tidal volume, lung-protective mechanical ventilation is recommended. However, in patients who cannot attain target oxygen level or develop high plateau pressure despite low-tidal volume ventilation and who cannot tolerate high carbon dioxide and low pH levels, extracorporeal membrane oxygenation (ECMO) may be considered as a good treatment option. In this article, cases of ARDS patients treated with ECMO in our clinic during 2013-14 have been retrospectively documented and discussed in line with the literature.Publication Metadata only Peripartum cardiomyopathy mimicking acute aortic dissection: successful salvage with extracorporeal membrane oxygenation support(BAYCINAR MEDICAL PUBL-BAYCINAR TIBBI YAYINCILIK, 2014) KEPEZ, ALPER; Isbir, Selim; Ak, Koray; Aslantas, Mustafa; Kepez, Alper; Cinel, Ismail; Arsan, SinanIn this article, we report a case admitted with severe chest pain associated with ST segment elevation, pericardial effusion and aortic flap appearance in echocardiography at the 31 weeks of gestation, mimicking aortic dissection, but diagnosed with peripartum cardiomyopathy and successfully treated with extracorporeal membrane oxygenation after developing acute cardiogenic shock.Publication Open Access Radial arterial thrombosis in COVID-19: A case report(2022-01-01) ÇİÇEK, FURKAN CUMA; EYÜPLER, ÇAĞLA; YETGİNOĞLU, ÖZGE; AK, KORAY; KOCAKAYA, DERYA; Durmus N. S. , ÇİÇEK F. C. , EYÜPLER Ç., Omur C., YETGİNOĞLU Ö., AK K., KOCAKAYA D.Thrombosis due to hypercoagulable state is an important cause of morbidity and mortality in coronavirus disease 2019 (COVID-19). Increased D-dimer levels are an important marker of the presence and risk of thrombosis. In this report, we present that a 59-year-old male patient developed thrombosis in the distal radial arteries despite normal D-dimer level. The patient was treated with enoxaparin, iloprost infusion, and cilostazol. This case should lead us to be very careful that people diagnosed with COVID-19 with normal D-dimer levels may also have thrombosis.Publication Metadata only Direct transaortic transcatheter aortic valve implantation(BAYCINAR MEDICAL PUBL-BAYCINAR TIBBI YAYINCILIK, 2014) KARARMAZ, ALPER; Isbir, Selim; Birkan, Yasar; Ak, Koray; Elci, Emre; Kararmaz, AlperTranscatheter aortic valve implantation (TAVI), has emerged as a new treatment option in patients with severe aortic stenosis who are considered to be high-risk for conventional surgery. In recent years, TAVI has been widely used in Turkey as in all the world. Transaortic approach for TAVI is a new approach in patients with poor peripheral vessels. In this article, we report a 82-year-old female case with severe aortic stenosis and coronary artery disease presenting with several comorbidities who was treated with direct transaortic TAVI and off-pump coronary artery bypass grafting for the first time in Turkey.Publication Open Access Comparison of New Technology Integrated and Nonintegrated Arterial Filters Used in Cardiopulmonary Bypass Surgery: A Randomized, Prospective, and Single Blind Study(HINDAWI LTD, 2013) AK, KORAY; Gursu, Ozgur; Isbir, Selim; Ak, Koray; Gerin, Fethullah; Arsan, SinanBackground. Innovative cardiopulmonary bypass (CPB) settings have been developed in order to integrate the concepts of surface-coating, blood-filtration, and miniaturization. Objectives. To compare integrated and nonintegrated arterial line filters in terms of peri-and postoperative clinical variables, inflammatory response, and transfusion needs. Material and Methods. Thirty-six patients who underwent coronary bypass surgery were randomized into integrated (Group In) and nonintegrated arterial line filter (Group NIn) groups. Arterial blood samples for the assessments of complete hemogram, biochemical screening, interleukin-6, interleukin-2R, and C-reactive protein were analyzed before and after surgery. Need for postoperative dialysis, inotropic therapy and transfusion, in addition to extubation time, total amount of drainage (mL), length of intensive care unit, and hospital stay, and mortality rates was also recorded for each patient. Results. Prime volume was significantly higher and mean intraoperative hematocrit value was lower in Group NIn, but need for erythrocyte transfusion was significantly higher in Group NIn. C-reactive protein values did not differ significantly except for postoperative second day's results, which were found significantly lower in Group In than in Group NIn. Conclusion. Intraoperative hematocrit levels were higher and need for postoperative erythrocyte transfusion was decreased in Group In.Publication Metadata only Evaluation of Right Ventricular Function in Functional Tricuspid Insufficiency(2020) AK, KORAY; Ak, Koray