Alper Uzun's research while affiliated with Ankara Güven Hospital and other places

Publications (17)

Article
Full-text available
In this case report, we present a patient scheduled for operation due to critical leg ischemia in whom a bilateral great saphenous vein (GSV) had already been used during previous cardiac and peripheral vascular surgeries. The patient underwent femorofemoral crossover bypass from left to right with a small saphenous vein and right femoropopliteal b...
Article
Full-text available
Aortoenteric fistula is an uncommon but life-threatening cause of gastrointestinal blood loss. We report a case of a 70-year-old man who presented to the emergency department with an episode of melena and infection in the left inguinal region. Diagnosis of secondary aortoenteric fistula was made between the left limb of the aortobifemoral graft and...
Data
Colonoscopy revealed ulcerative mucosal areas and aortic graft covered by thrombus.
Article
Full-text available
In this study, we sought to determine the early postoperative results of arterio-venous fistulae (AVF) created by U-vein compressors with veins between 1.5 and 2 mm in size. Pre-operative venous mapping was done. The fistula tract was marked at 0-, 4-, 8- and 12-cm points; 0 cm was the estimated point where the anastomosis would be done. With Doppl...
Article
Aim: Other techniques are required due to the negative influence of poor superficial venous system calibration (<1.5-2 mm) to the long term patency of the arteriovenous fistula which is documented via preoperative Doppler ultrasound examination. The postoperative outcome of 32 patients were compared prospectively whom autologous saphenous vein brid...
Article
Objective: Prosthetic vascular access is the other choice when the superficial venous system is inadequate to perform a simple radio-cephalic and brachio-cephalic fistula. Methods: This paper reports the outcomes of a prospective cohort study of 54 patients who underwent either saphenous vein (SVI Group, n=29) or PTFE graft (PTFE Group, n=25) in...
Article
Full-text available
Background The objective of this study was to evaluate whether admission neutrophil–lymphocyte ratio (NLR) and platelet–lymphocyte ratio (PLR) might reflect amputation in patients with critical limb ischemia (CLI) who could not get surgical or radiological (percutaneous transluminal angioplasty) revascularization. Methods A total of 104 patients w...
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Full-text available
Subvalvular apparatus preservation is an important concept in mitral valve replacement (MVR) surgery that is performed to remedy mitral regurgitation. In this study, we sought to determine the effects of papillary muscle repositioning (PMR) on clinical outcomes and echocardiographic left ventricular function in rheumatic mitral stenosis patients wh...
Article
A median sternotomy is the most common approach for cardiac and great vessel surgery. After a median sternotomy, healing complications such as instability, nonunion, and infection, are rare but devastating. Predisposing factors for sternal complications are old age, diabetes, steroid treatment, postmenopause state, obesity, reoperation, and the use...
Article
To show the effects on lung function of the opening pleura in patients undergoing cardiac surgery. 66 patients were included. Patients were allocated into two groups. In group 1 (n=21) pleura was intact, in group 2 (n=45) pleura was opened. Both groups were compared prospectively in terms of preoperative and on the post-operative 5th day pulmonary...
Article
Full-text available
We evaluated the vasodilatory effects of two antioxidants, vitamins C (ascorbic acid) and E (α-tocopherol), on radial artery and endothelium-dependent responses in patients awaiting coronary artery bypass surgery. The study was performed in three groups. The first group took 2 g of vitamin C orally (n = 31, vitamin C group), the second group took 2...
Article
Objective: The aim of this study was to examine the effects of positive inotropic drugs, including adrenaline, dopamine, and dobutamine on thyroid hormone levels following open heart surgery. Methods: We analyzed free thyroid hormones (FT3 and FT4) and thyroid-stimulating hormones (TSH) in 200 consecutive patients undergoing open heart surgery....
Article
Full-text available
Introduction: We hypothesized that the red cell distribution width (RDW) would predict the outcome of surgical revascularization of patients with coronary artery disease.Materials and Methods: Ninety four patients with severe coronary artery disease who underwent coronary artery bypass grafting were included in this study. A total of 94 patients we...
Article
We present a case of a displaced atrial septal defect (ASD) occluder in the left ventricle. We successfully adapted a strategy to remove the device through a single right atrial incision which permitted retrieval of the occluder and the closure of the ASD.

Citations

... Aortoduodenal fistula is a rare complication associated with an abdominal aortic aneurysm and severe atherosclerosis [1], when it is considered to be primary, due to the spontaneous formation of a communication between the lumen of an aortic aneurysm and the duodenum [1]. ...
... şekilli ven bası uygulayıcı cihaz kullanımı ile özellikle 2mm'den küçük çapa sahip fistüllerde daha yüksek açık kalım oranları saptamışlardır(23). Bizim çalışmamızda ise ven dilatasyonu intraluminal hidrostatik basınç etkisi ile sağlandı ve bu şekilde ven dilatasyonu sağlanan hastaların 1. ayın sonunda daha yüksek oranda açık kaldığı görüldü. ...
... Studies have shown that RDW has a positive correlation with inflammatory markers such as C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) [35]. There are also several other studies showing that preoperative RDW is strongly related to surgical outcomes in cardiac surgery [36]. PLR increases with the inflammatory process and is used to predict the outcomes and independent mortality in cardiovascular diseases [37]. ...
... Since our two patients does not have an autologous vein for bypass surgery, which long-term patency is better than PTFE grafts [9] , we decided to perform a central venous bypass using PTFE graft, after a multidisciplinary staff with our cardiac surgeons and nephrologists colleagues. ...
... 13 Some modifications of the Robicsek technique are still the gold standard in high-risk patients. 14,15 The Robiscek technique is often used to strengthen the sternum during primary sternal closure, where the sternotomy crosses the medial line and results in a thin and weak sternum on one side, or where the bone fracture has occurred and is also used as the first line of sternal reconstruction after primary closure dehiscence. 15,16 In patients with an increased risk of sternal instability and wound infection following cardiac surgery, 17 sternal strengthening using the Robicsec technique is performed before primary sternal closure to not reduce the dehiscence rate. ...
... Of these, in 1 case two were deleted and in 4 -one first-order chord. Nevertheless, being of the opinion that the preserved chordal-papillary apparatus of MK leads to an improvement in myocardial function, it is necessary to completely save the leaflet with subvalvular apparatus [13][14]. The duration of cardiopulmonary bypass was on average 84.7±29.8 ...
... The researchers concluded that vitamin C use, both on its own and in conjunction with other therapies, may mitigate POAF in individuals experiencing cardiac surgery, and it ought to be advised to patients to minimize the risk of POAF. Also, there is a direct correlation between the physiological effects of vitamin E and C. Ingesting supplements with 2 g of vitamin C and 600 mg of vitamin E significantly augmented endothelium-dependent vasodilatation in the radial circulation in patients with coronary artery disease (CAD)(129). On the other hand, resveratrol is a nonflavonoid stilbenoid that has a wide range of therapeutic advantages, notably antioxidant and antineuroprotective, vasorelaxant, and cardioprotective activities(130). ...
... A reduction in postoperative FEV 1 and FVC among all patients after cardiac surgery including those who used incentive spirometry or deep breathing exercises has been reported previously. This is likely linked to the loss of pleural integrity during cardiac surgery (Uzun et al., 2013). Secondary atelectasis due to lack of postoperative efforts for coughing or deep breathing or related to the left lower lobe injury caused by lung retraction during surgery is also another precipitating factor (Huffmyer & Groves, 2015). ...
... Neutrophilia is responsible for increasing the value of the ratio, being the result of various pathophysiological processes that contribute to the maintenance of the pro-inflammatory status in PAD [51]. Taşoglu et al. [52] showed that the presence of an NLR value above 3.2 and a PLR above 160 are associated with a high risk of amputation, with the average duration being about 2 years to date. ...
... [2] The other suggested mechanisms of acute failure are as follows: operator-related failure resulting from inadequate experience (learning curve), inaccurate placement, inadequate defect rim to hold the device, tearing of the interatrial septum, at the lower rim of the ASD during catheter, particularly, and device manipulation. [3] According to Boysan et al. [4] coughing may be an interesting reason for device embolization. ...