Browsing by Author "Aytekin, Cuneyt"

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Anatomic Variations of The Celiac Trunk and Hepatic Arterial System with Digital Subtraction Angiography
(2014) Zagyapan, Ragiba; Kurkcuoglu, Ayla; Bayraktar, Ahmet; Pelin, Can; Aytekin, Cuneyt; https://orcid.org/0000-0003-0901-8883; https://orcid.org/0000-0001-5134-168X; 25910286; AEJ-3035-2022
Background/Aims: Anatomical variation of the abdominal arteries is important. Historic and modern anatomists, radiologists, as well as surgeons have reported and accumulated anatomical variations with a morphological and clinical interest. During graft procurement and reconstruction, accidental injury of the hepatic artery is more likely in the presence of hepatic arterial variation, which can be a common clinical entity. During cadaveric dissection and diagnostic radiological imaging, various types of vascular anomalies are frequently found in human abdominal viscera, especially the celiac trunk. The aim of the present study is to determine anatomical variations in the celiac trunk and hepatic arterial system. Materials and Methods: Digital subtraction angiography data were collected from 152 consecutive donor patients (103 males and 49 females, aged between 6 and 77 years) who underwent orthotopic liver transplantation. Results: We examined the anatomy of the celiac trunk in a total of 152 consecutive patients. In total, 62.5% (95/152) of patients showed the classical trifurcation of the celiac trunk. Variant right hepatic arteries arising from the superior mesenteric artery were observed in 17.8% (27/152), the hepatic arteries arising from the left gastric artery were found in 13.1% (20/152), and common hepatic arteries arising from the superior mesenteric artery were observed in 6.6% (10/152) of patients. Conclusion: These data are useful for planning and performing surgical and radiological procedures of the upper abdomen.
The Efficacy of Flow Diverter Stents in the Treatment of Wide-Necked Intracranial Aneurysms
(2017) Duman, Enes; Yildirim, Erkan; Ozdemir, Adnan; Arslan, Serdar; Aytekin, Cuneyt; Bovyat, Fatih; 0000-0002-9057-722X; F-4230-2011; ABI-3856-2020
Background: To present our findings obtained from the treatment of wide-necked intracranial neurysms with flow diverter stents. Patients and Methods: Intracranial aneurysms were determined in 19 patients (14 females, 5 males; mean age, 56.6 years) between May 2011 and June 2014, and the patients were treated using flow diverter stents. A total of 28 flow diverter stents, including 9 Silk and 19 Pipeline stents were used. Occlusion rates evaluated with computed tomography at the end of month 6 and digital subtraction angiography after one year, intraoperative success, morbidity and mortality rates were determined. Results: A total of 20 endovascular interventions, including two interventions in two different aneurysms in one patient were performed in 19 patients. Flow diverter stents were successfully implemented for wide-necked aneurysms at a success rate of 100%. Coil treatment had previously been performed in four patients. Aneurysm occlusion rates were 77.2% at month 6 and 90.9% at the end of month 12. Conclusion: The use of flow diverter stents is a reliable and effective method in the treatment of wide-necked intracranial aneurysms with high aneurysm occlusion, and low morbidity and mortality rates.
Endovascular Management of Arterial Complications Following Renal Transplant Biopsy
(2018) Ozyer, Umut; Harman, Ali; Soy, Ebru H. Ayvazoglu; Aytekin, Cuneyt; Boyvat, Fatih; Haberal, Mehmet; 0000-0002-4300-009X; 0000-0002-7386-7110; 0000-0002-0993-9917; 0000-0002-3462-7632; AAK-9071-2021; K-9824-2013; AAC-5566-2019; F-4230-2011; AAJ-8097-2021
Evaluation of Safety and Efficacy of Liver Biopsy Following Liver Transplant
(2015) Kirnap, Mahir; Akdur, Aydincan; Reyhan, Nihan Haberal; Aytekin, Cuneyt; Harman, Ali; Yildirim, Sedat; Moray, Gokhan; Haberal, Mehmet; 0000-0003-2498-7287; 0000-0001-9852-9911; 0000-0002-3462-7632; 0000-0002-5735-4315; 0000-0002-8726-3369; 0000-0002-7386-7110; 0000-0001-5134-168X; 25894180; AAE-1041-2021; AAK-4587-2021; AAJ-8097-2021; AAF-4610-2019; AAH-9198-2019; AAA-3068-2021; K-9824-2013
Objectives: Liver biopsy is a diagnostic tool for liver pathology after liver transplant. However, biopsy can cause life-threating complications. There is limited knowledge about efficacy and complications of liver biopsy after liver transplant. Our aim was to evaluate the risk and benefit of liver biopsy after liver transplant and quality of biopsy specimens. Materials and Methods: We retrospectively analyzed all liver biopsies performed after liver transplant between January 2000 and October 2014. All patients were monitored for minimum 24 hours after biopsy. Results: We performed 245 liver biopsies in 159 liver transplant patients. Fifteen biopsies (6%) were nondiagnostic. In the samples, there were 102 cases (41%) of acute rejection, 79 cases (35%) of cholangitis, and 49 cases (20%) of cholestasis observed. Complications after biopsy were seen in 23 patients (9%) and biopsies. There were 7 patients who had severe abdominal pain followed by fever. We diagnosed 4 patients who had intercostal/subcapsular bleeding and 12 patients who had vasovagal reaction. All patients were treated with analgesic agents and monitored for 24 hours. No blood transfusion or surgery was required. Conclusions: Liver biopsy after liver transplant is an invasive diagnostic tool for liver pathology. However, it can be used safely in experienced centers.
Fluoroscopically Guided Retrograde Double-J Stent Removal in Renal Transplant Patients
(2018) Aytekin, Cuneyt; Harman, Ali; Ozyer, Umut; Akdur, Aydincan; Boyvat, Fatih; Haberal, Mehmet; 0000-0002-7386-7110; 0000-0002-4300-009X; 0000-0002-8726-3369; 0000-0002-3462-7632; K-9824-2013; AAK-9071-2021; AAA-3068-2021; F-4230-2011; AAJ-8097-2021
Percutaneous Transhepatic Tips for Budd-Chiari Syndrome: Direct Simultaneous Puncture of Portal Vein and Inferior Vena Cava
(2018) Boyvat, Fatih; Harman, Ali; Soy, Ebru H. Ayvazoglu; Aytekin, Cuneyt; Moray, Gokhan; Boyacioglu, Sedat; Haberal, Mehmet; 0000-0002-7386-7110; 0000-0002-0993-9917; 0000-0003-2498-7287; 0000-0002-9370-1126; 0000-0002-3462-7632; F-4230-2011; K-9824-2013; AAC-5566-2019; AAE-1041-2021; AAE-7637-2021; AAJ-8097-2021
Results of radiofrequency ablation treatment in primary and metastatic liver cancer
(2017) Aytekin, Cuneyt; Yuksel, Yavuz
Objective: The aim of this present study was to retrospectively evaluate the local therapeutic efficiency of radiofrequency ablation (RFA) treatment in patients with primary and metastatic liver cancer. Material and Methods: A total of 35 patients who had undergone RFA in our clinic were included in the study and evaluated retrospectively. Patients were grouped according to their ages, lesion's primary or metastatic formation, number of lesions and lesion sizes. Local tumor growth, new lesion formation and general survival factors were evaluated statistically. Results: During the follow-up after RFA treatment, the residual tumor was determined in the treatment area in only one (1.9%) lesion. Total ablation was achieved in 50 lesions (98.0%). Local tumor growth occured in 9 lesions of eight patients (17.6%). During follow-up, development of a new lesion at a different liver region was seen in 22 (62.8%) patients. Following RFA, one patient had cholecystitis while intraperitoneal minimal hemorrhage was encountered in two patients. Conclusion: As RFA treatment protects intact liver tissues, directly targets the tumor, and the mortality and morbidity rates are lower when compared to other treatments, it is currently considered safe for the treatment of liver tumors.
The Role of Choice-Lock Catheter and Trocar Technique in Percutaneous Ablation of Symptomatic Renal Cysts
(2014) Ozkan, Burak; Harman, Ali; Emiroglu, Baris; Arer, Ilker; Aytekin, Cuneyt; 25035702
Background: The most common benign lesions of the kidney are simple cysts. They are acquired lesions and mostly affect the elderly population. Objectives: To describe the usage of choice-lock catheter and trocar technique in percutaneous renal cyst treatment and determining long-term outcomes. Patients and Methods: This retrospective study was carried out between February 2000 and July 2011 Eighty-eight cysts all of which were Bosniak type-1 cysts were selected in 75 patients. The treatment indications were flank pain, hydronephros is and hypertension. The choice-lock catheter was used for 84 cysts with the trocar technique. Ninety-five percent ethanol was used as the sclerosing agent. Maximum volume of the injected ethanol was 175 ml. The mean follow-up time after the treatment procedure was 23 months. Sixty-four cysts were located in the cortical and 24 cysts were located at the parapelvic region. Results: Fifty-seven cysts had complete regression, while 31 cysts regressed partially After the procedure, pain was relieved in 44 (82%) patients and the pain alleviated in four (8%). Normotension was obtained in five (62.5%) of the eight hypertensive patients and no hydronephrosis was detected in nine patients. There were no relationship between the localization and the regression rate. No major complications occurred. Conclusions: Percutaneous ethanol sclerotheraphy in simple cysts is a safe, cost-effective and minimally invasive method. We consider that this technique may be an alternative solution in the percutaneous cyst treatment.
Simultaneous Percutaneous Large Profile Multiple Plastic Stents for Biliary Anastomotic Strictures After Liver Transplantation
(2016) Boyvat, Fatih; Harman, Ali; Akdur, Aydincan; Aytekin, Cuneyt; Kirnap, Mahir; Moray, Gokhan; Haberal, Mehmet; https://orcid.org/0000-0002-7386-7110; https://orcid.org/0000-0002-8726-3369; https://orcid.org/0000-0003-2498-7287; https://orcid.org/0000-0002-3462-7632; F-4230-2011; K-9824-2013; AAA-3068-2021; AAH-9198-2019; AAE-1041-2021; AAJ-8097-2021
Successful Percutaneous Management of Recurrent Sclerosing Cholangitis After Liver Transplantation with Multiple Intrahepatic Plastic Biliary Stent Placement with Only One Access
(2016) Boyvat, Fatih; Aytekin, Cuneyt; Akdur, Aydincan; Moray, Gokhan; Haberal, Mehmet; https://orcid.org/0000-0002-8726-3369; https://orcid.org/0000-0003-2498-7287; https://orcid.org/0000-0002-3462-7632; F-4230-2011; AAA-3068-2021; AAE-1041-2021; AAJ-8097-2021
Successful Treatment of a Rare Complication in a Heart Transplant Recipient: Spontaneous Axillary Artery Bleeding
(2019) Karacaglar, Emir; Akgun, Arzu Neslihan; Aytekin, Cuneyt; Aydinalp, Alp; Sezgin, Atilla; Muderrisoglu, I.Haldun; 30373508
Spontaneous atraumatic axillary artery bleeding is an unusual clinical entity. Axillary artery bleeding is associated with a high mortality rate. Vascular fragility is defined as a decrease in blood vessel resistance, and increased vascular fragility is one of the reasons for arterial bleeding. In this report, we present a case of spontaneous axillary artery bleeding in a heart transplant recipient.
Ultrasound-Guided Brachiocephalic Vein Catheterization in Infants Weighing Less than Five Kilograms
(2015) Aytekin, Cuneyt; Ozyer, Umut; Harman, Ali; Boyvat, Fatih; 0000-0002-4300-009X; 0000-0002-7386-7110; 0000-0001-5134-168X; 26044899; F-4230-2011; AAK-9071-2021; K-9824-2013
Purpose: To describe our experience with the use of ultrasound-guided supraclavicular brachiocephalic vein approach for central vein catheterization in infants weighing less than 5 kg. Methods: A retrospective review was performed for infants who underwent ultrasound-guided central vein catheterization from January 2012 to November 2014. Infants weighing less than 5 kg with supraclavicular brachiocephalic vein access were included in the study. Indications for central venous access, venous access side, catheter type and complications were evaluated. Results: Thirty-four catheterizations in 34 infants weighing from 1.5 to 4.9 kg (median 3.48 kg) were included in the study (aged 11 days to 7 months and 10 days, weight range 1.5 to 4.9 kg). Technical success rate was 97% (33 of 34 infants). No technical or clinical major complications were observed. Conclusions: Ultrasound-guided supraclavicular brachiocephalic vein access is a favorable alternative for central venous catheterization in low-weight infants with regard to high technical success rate and absence of major complications.