Tıp Fakültesi / Faculty of Medicine

Permanent URI for this collectionhttps://hdl.handle.net/11727/1403

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Author: search.filters.author.Kahraman, GokhanHas files: No

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    Interventional Treatment Methods for Ureteral Complications After Kidney Transplant: A Single-Center Experience
    (2023) Ozen, Ozgur; Karakaya, Emre; Zeydanli, Tolga; Kahraman, Gokhan; Yildirim, Sedat; Boyvat, Fatih; Haberal, Mehmet; 0000-0002-4879-7974; 0000-0001-7122-4130; 37698400; AAD-5466-2021; F-4230-2011; AAN-1681-2021
    Objectives: Ureteral complications are one of the most common complications after kidney transplant. Although these complications have been treated surgically in the past, almost all can be successfully treated with interventional methods today. In this study, we assessed the interventional treatment of ureteral complications after kidney transplants performed in our center and the long-term results of these treatments. Materials and Methods: We performed a retrospective analysis of 2223 kidney transplant recipients seen between January 1, 2000, and May 1, 2020. Among these, 70 kidney transplant recipients who experienced ureteral leakage or ureteral obstruction in the early or late posttransplant period were included in the study. Complications within the first 2 months posttransplant were classified as early complications, whereas those occurring after 2 months were considered late complications. We treated all patients with interventional methods.Results: In review of patients, 44 patients were diagnosed with ureteral obstruction (22 patients were early obstruction, 22 were late obstruction) and 26 patients with ureteral anastomosis leakage. All patients with early and late ureteral obstruction were successfully treated with percutaneous methods. In the group of patients with ureteral leakage, all patients except 2 patients were treated with interventional methods. For 2 patients with ureteral leakage, surgical treatment was necessary because of persistent leakage despite percutaneous treatment methods. Conclusions: Ureteral complications after kidney transplant can be successfully treated with interventional methods in experienced centers without the need for surgery.
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    Diagnostic Impact of Quantitative Dual-Energy Computed Tomography Perfusion Imaging for the Assessment of Subsegmental Pulmonary Embolism
    (2021) Celtikci, Pinar; Hekimoglu, Koray; Kahraman, Gokhan; Bozbas, Serife; Gultekin, Bahadir; Akay, Hakki Tankut; 0000-0002-1655-6957; 0000-0002-0805-0841; 33186173; AAD-9097-2021; ABA-7388-2021
    Objective The aim of this study was to investigate the quantitative differences of dual-energy computed tomography perfusion imaging measurements in subsegmental pulmonary embolism (SSPE), between normal lung parenchyma (NLP) and hypoperfused segments (HPS) with and without thrombus on computed tomography angiography (CTA). Methods Lung attenuation, iodine density, and normalized uptake values were measured from HPS and NLP on iodine maps of 43 patients with SSPE. Presence of pulmonary embolism (PE) on CTA was recorded. One-way repeated-measures analysis of variance and Kruskal-Wallis analyses with post hoc comparisons were conducted. Results The numbers of HPS with and without SSPE on CTA were 45 (55.6%) and 36 (44.4%), respectively. Lung attenuation of NLP was significantly different from HPS (P < 0.001). Iodine density and normalized uptake values of HPS with PE were significantly lower than those of HPS without PE, which is significantly lower than NLP (P < 0.001). Conclusions Subsegmental pulmonary embolism causes HPS on dual-energy computed tomography perfusion imaging, which demonstrates different iodine density and normalized uptake values depending on the presence of thrombus.
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    Oxalosis Crystals' Redeposition in Cardiac Tissue Leading to New-Onset Fatal Cardiac Complication After Liver Transplant in Primary Oxalosis Patient: Case Report
    (2020) AlShalabi, Omar; Soy, Ebru H. Ayvazoglu; Akdur, Aydincan; Karakaya, Emre; Kahraman, Gokhan; Moray, Gokhan; Haberal, Mehmet; 0000-0002-4879-7974; 0000-0002-3462-7632; 0000-0002-0993-9917; 0000-0002-8726-3369; 0000-0003-2498-7287; 33187466; AAD-5466-2021; AAJ-8097-2021; AAC-5566-2019; AAA-3068-2021; AAE-1041-2021
    Primary oxalosis is a rare hereditary disorder of metabolism resulting in accumulation of calcium oxalate in almost all tissues of the body. All published data point out the improvement of cardiac function after transplant. Here, we report the first case in the literature of an 8-year-old patient with primary oxalosis in which oxalosis implantations increased in cardiac tissue after liver transplant and manifested as new-onset ventricular tachycardia and cardiomyopathy, leading to death.