Tıp Fakültesi / Faculty of Medicine
Permanent URI for this collectionhttps://hdl.handle.net/11727/1403
Browse
3 results
Search Results
Item The Use of ERCP during Pregnancy: Is it Safe and Effective?(2014) Akcakaya, Adem; Koc, Bora; Adas, Gokhan; Kemik, Ozgur; 24901127Cholangitis and pancreatitis are the most gruesome complications that can be potentially fatal for the mother and fetus. The management of bile stone disease complicated with duct stones during pregnancy is challenging. Conservative treatment instead of surgery has always been advocated due to the increased risk for fetal compromise. Minimally invasive therapy with ERCP has been suggested as an effective therapeutic option for the management of pancreaticobiliary diseases during pregnancy. The main topics of discussion are the risks stemming from the endoscopic procedure itself, drugs used for sedation and the adverse effects of radiation exposure on the fetus. In this manuscript, we want to present the efficiency and feasibility of the ERCP for the management of hepatobiliary and pancreatic diseases in pregnancy.Item Effects of Mesenchymal Stem Cells and VEGF on Liver Regeneration Following Major Resection(2016) Adas, Gokhan; Koc, Bora; Adas, Mine; Duruksu, Gokhan; Subasi, Cansu; Kemik, Ozgur; Kemik, Ahu; Sakiz, Damlanur; Kalayci, Mustafa; Purisa, Sevim; Unal, Seda; Karaoz, Erdal; 27094936The study aims to determine the effects of mesenchymal stem cell (MSC) therapy and a combination therapy of MSCs transfected with vascular endothelial growth factor (VEGF) for liver regeneration after major resection. Thirty-eight rats were divided into four groups: group 1: control (sham operation); group 2: control (70 % hepatic resection); group 3: 70 % hepatic resection + systemically transplanted MSCs; and group 4: 70 % hepatic resection + systemically transplanted MSCs transfected with the VEGF gene. MSCs were injected via the portal vein route in study groups 3 and 4. Expression levels of VEGF, fibroblast growth factor (FGF), platelet-derived growth factor (PDGF), epidermal growth factor (EGF), transforming growth factor (TGF), hepatocyte growth factor (HGF), and augmenter of liver regeneration (ALR) were analyzed in the remnant liver tissue. We investigated the levels of angiogenic factors, VEGF-receptor, angiopoietin-1 (Angpt1) and Angpt2. Biochemical parameters of liver function in blood samples were measured and a histologic assessment of the livers was performed. The postoperative liver weight and volume of each rat were measured 14 days after surgery. The expression levels of all measured growth factors were significantly increased in groups 3 and 4 compared to the control groups. The levels of Angpt1 and Angpt2 correlated with levels of VEGF and thus were also significantly higher in the study groups. There were significant differences between the estimated liver weights and volumes of group 4 and the resected controls in group 2. With the exception of portal inflammation, levels of all histological parameters were observed to be higher in MSC-treated groups when compared with the resected controls in group 2. Transplanted stem cells and MSCs transfected with VEGF significantly accelerated many parameters of the healing process following major hepatic resection. After the injection of MSCs and VEGF-transfected MSCs into the portal vein following liver resection, they were engrafted in the liver. They increased bile duct and liver hepatocyte proliferation, and secreted many growth factors including HGF, TGF beta, VEGF, PDGF, EGF, and FGF via paracrine effects. These effects support liver function, regeneration, and liver volume/weight.Item Complications Following Endoscopic Retrograde Cholangiopancreatography: Minimal Invasive Surgical Recommendations(2014) Koc, Bora; Bircan, Huseyin Yuce; Adas, Gokhan; Kemik, Ozgur; Akcakaya, Adem; Yavuz, Alpaslan; Karahan, Servet; 25426633Background: ERCP has a complication rate ranging between 4% and 16% such as post-ERCP pancreatitis, hemorrhage, cholangitis and perforation. Perforation rate was reported as 0.08% to 1% and mortality rate up to 1.5%. Besides, injury related death rate is 16% to 18%. In this study we aimed to present a retrospective review of our experience with post ERCP-related perforations, reveal the type of injuries and management recommendations with the minimally invasive approaches. Methods: Medical records of 28 patients treated for ERCP-related perforations in Okmeydani Training and Research Hospital between March 2007 and March 2013 were reviewed retrospectively. Patient age, gender, comorbidities, ERCP indication, ERCP findings and details were analyzed. All previous and current clinical history, laboratory and radiological findings were used to assess the evaluation of perforations. Results: Between March 2007 and March 2013, 2972 ERCPs were performed, 28 (0.94%) of which resulted in ERCP-related perforations. 10 of them were men (35.8%) and 18 women (64.2%). Mean age was 53.36 +/- 14.12 years with a range of 28 to 78 years. 14 (50%) patients were managed conservatively, while 14 (50%) were managed surgically. In 6 patients, laparoscopic exploration was performed due to the failure of non-surgical management. In 6 of the patients that ERC-Prelated perforation was suspected during or within 2 hours after ERCP, underwent to surgery primarily. There were two mortalities. The mean length of hospitalization stay was 10.46 +/- 2.83 days. The overall mortality rate was 7.1%. Conclusion: Successful management of ERCP-related perforation requires immediate diagnosis and early decision to decide whether to manage conservatively or surgically. Although traditionally conventional surgical approaches have been suggested for the treatment of perforations, laparoscopic techniques may be used in well-chosen cases especially in type II, III and IV perforations.