Tıp Fakültesi / Faculty of Medicine
Permanent URI for this collectionhttps://hdl.handle.net/11727/1403
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Item The Changes with the New Legislations(2023) Bicakcioglu, Murat; Gedik, EnderOrgan transplantation is the most important option for the treatment of end-stage diseases. However, there is a large difference between the number of patients on the waiting list and the number of transplants performed. The gradual increase in this difference creates ethical problems related to organ transplantation. Ethical problems and other limitations require organ transplantation to be controlled by legal regulations. In our country, organ transplantation practice is carried out under the supervision of the state. Organ Transplant Practice Regulation has been updated by being published in the Official Gazette dated 09.12.2022 and numbered 32008. Possible end-of-life decisions in brain death are stated in accordance with the conditions of our country. "In cases where brain death is diagnosed, the organ preservation protocols applied are terminated in the absence of family or legal guardian approval regarding organ donation. In case of organ donation by the family or legal guardian, the organ preservation protocols needed for donor care are continued during the period until the transplantation of the organ to the waiting patient", and a solution has been presented to the intensive care physicians for the prognosis of the cases that donated or could not be donated.In the regulation in which the prerequisites of the brain death diagnostic criteria are specified, it is stated that the central body temperature should be =36 degrees C. With the new regulation, end-of-life decisions on brain death and changes made in relation to central body temperature have brought convenience in the diagnosis and follow- up process.Item Ethics and Clinical Communications(2023) Yesiler, Fatma Irem; Gedik, EnderThe diagnosis of brain death has medical, legal and ethical aspects. While the main determinant is the medical approach of the physician in terms of ethics, legal situations are also effective in the process. Non-harm, beneficence, respect for autonomy and justice are the principles that are widely accepted and form the basis of medical ethics. Understanding these principles is a must in order to talk about the ethics of brain death and organ transplantation. In the process of diagnosis and management of brain death, the physician should convey the process to the relatives of the patients in a clear and understandable language and in accordance with the educational-cultural levels of the relatives of the patients. The fact that the concept of brain death is misunderstood in the society or lack of knowledge creates social ethical problems. Special training should be given to health professionals for brain death awareness and early diagnosis, and their ability to resolve ethical problems should be strengthened. Human resources are of great importance in the diagnosis of brain death and in the process of organ transplantation from a cadaver. Communication skills are the mainstay of interaction within the clinic. Organ transplant coordinators should run the process smoothly by creating a bridge between the physician responsible for the case and the intensive care physicians. Such an approach will reduce ethical issues and ensure a successful diagnosis and donation process.Item Blood Glucose Regulation During Living-Donor Liver Transplant Surgery(2015) Gedik, Ender; Toprak, Huseyin Ilksen; Koca, Erdinc; Sahin, Taylan; Ozgul, Ulku; Ersoy, Mehmet Ozcan; 0000-0002-7175-207X; 25894177; ABI-2971-2020Objectives: The goal of this study was to compare the effects of 2 different regimens on blood glucose levels of living-donor liver transplant. Materials and Methods: The study participants were randomly allocated to the dextrose in water plus insulin infusion group (group 1, n = 60) or the dextrose in water infusion group (group 2, n = 60) using a sealed envelope technique. Blood glucose levels were measured 3 times during each phase. When the blood glucose level of a patient exceeded the target level, extra insulin was administered via a different intravenous route. The following patient and procedural characteristics were recorded: age, sex, height, weight, body mass index, end-stage liver disease, Model for End-Stage Liver Disease score, total anesthesia time, total surgical time, and number of patients who received an extra bolus of insulin. The following laboratory data were measured pre- and postoperatively: hemoglobin, hematocrit, platelet count, prothrombin time, international normalized ratio, potassium, creatinine, total bilirubin, and albumin. Results: No hypoglycemia was noted. The recipients exhibited statistically significant differences in blood glucose levels during the dissection and neohepatic phases. Blood glucose levels at every time point were significantly different compared with the first dissection time point in group 1. Excluding the first and second anhepatic time points, blood glucose levels were significantly different as compared with the first dissection time point in group 2 (P < .05). Conclusions: We concluded that dextrose with water infusion alone may be more effective and result in safer blood glucose levels as compared with dextrose with water plus insulin infusion for living-donor liver transplant recipients. Exogenous continuous insulin administration may induce hyperglycemic attacks, especially during the neohepatic phase of living-donor liver transplant surgery. Further prospective studies that include homogeneous patient subgroups and diabetic recipients are needed to support the use of dextrose plus water infusion without insulin.Item Extracorporeal Membrane Oxygenation After Living-Related Liver Transplant(2015) Gedik, Ender; Celik, Muhammet Reha; Otan, Emrah; Disli, Olcay Murat; Erdil, Nevzat; Bayindir, Yasar; Kutlu, Ramazan; Yilmaz, Sezai; 0000-0002-7175-207X; 25894176; ABI-2971-2020Various types of extracorporeal membrane oxygenation methods have been used in liver transplant operations. The main indications are portopulmonary or hepatopulmonary syndromes and other cardiorespiratory failure syndromes that are refractory to conventional therapy. There is little literature available about extracorporeal membrane oxygenation, especially after liver transplant. We describe our experience with 2 patients who had living-related liver transplant. A 69-year-old woman had refractory aspergillosis pneumonia and underwent pumpless extracorporeal lung assist therapy 4 weeks after liver transplant. An 8-month-old boy with biliary atresia underwent urgent liver transplant; he received venoarterial extracorporeal membrane oxygenation therapy on postoperative day 1. Despite our unsuccessful experience with 2 patients, extracorporeal membrane oxygenation and pumpless extracorporeal lung assist therapy for liver transplant patients may improve prognosis in selected cases.Item The 2-Stage Liver Transplant: 3 Clinical Scenarios(2015) Gedik, Ender; Bicakcioglu, Murat; Otan, Emrah; Toprak, Huseyin Ilksen; Isik, Burak; Aydin, Cemalettin; Kayaalp, Cuneyt; Yilmaz, Sezai; 0000-0001-9293-8116; 0000-0002-2395-3985; 0000-0002-7175-207X; 0000-0003-4657-2998; 25894175; ABB-5579-2020; AAH-1764-2021; AAN-4023-2020; A-6657-2018; ABI-2971-2020The main goal of 2-stage liver transplant is to provide time to obtain a new liver source. We describe our experience of 3 patients with 3 different clinical conditions. A 57-year-old man was retransplanted successfully with this technique due to hepatic artery thrombosis. However, a 38-year-old woman with fulminant toxic hepatitis and a 5-year-old-boy with abdominal trauma had poor outcome. This technique could serve as a rescue therapy for liver transplant patients who have toxic liver syndrome or abdominal trauma. These patients required intensive support during long anhepatic states. The transplant team should decide early whether to use this technique before irreversible conditions develop.Item Percutaneous Dilational Tracheotomy in Solid-Organ Transplant Recipients(2015) Ozdemirkan, Aycan; Ersoy, Zeynep; Zeyneloglu, Pinar; Gedik, Ender; Pirat, Arash; Haberal, Mehmet; 0000-0003-0767-1088; 0000-0002-3462-7632; 0000-0003-2312-9942; 0000-0002-7175-207X; 26640911; AAF-3066-2021; AAH-7003-2019; AAJ-8097-2021; C-3736-2018; ABI-2971-2020Objectives: Solid-organ transplant recipients may require percutaneous dilational tracheotomy because of prolonged mechanical ventilation or airway issues, but data regarding its safety and effectiveness in solid-organ transplant recipients are scarce. Here, we evaluated the safety, effectiveness, and benefits in terms of lung mechanics, complications, and patient comfort of percutaneous dilational tracheotomy in solid-organ transplant recipients. Materials and Methods: Medical records from 31 solid-organ transplant recipients (median age of 41.0 years [interquartile range, 18.0-53.0 y]) who underwent percutaneous dilational tracheotomy at our hospital between January 2010 and March 2015 were analyzed, including primary diagnosis, comorbidities, duration of orotracheal intubation and mechanical ventilation, length of intensive care unit and hospital stays, the time interval between transplant to percutaneous dilational tracheotomy, Acute Physiology and Chronic Health Evaluation II score, tracheotomy-related complications, and pulmonary compliance and ratio of partial pressure of arterial oxygen to fraction of inspired oxygen. Results: The median Acute Physiology and Chronic Health Evaluation II score on admission was 24.0 (interquartile range, 18.0-29.0). The median interval from transplant to percutaneous dilational tracheotomy was 105.5 days (interquartile range, 13.0-2165.0 d). The only major complication noted was left-sided pneumothorax in 1 patient. There were no significant differences in ratio of partial pressure of arterial oxygen to fraction of inspired oxygen before and after procedure (170.0 [inter quartile range, 102.2-302.0] vs 210.0 [interquartile range, 178.5-345.5]; P=.052). However, pulmonary compliance results preprocedure and postprocedure were significantly different (0.020 L/cm H2O [interquartile range, 0.015-0.030 L/cm H2O] vs 0.030 L/cm H2O [interquartile range, 0.020-0.041 L/cm H2O); P=.001]). Need for sedation significantly decreased after tracheotomy (from 17 patients [54.8%] to 8 patients [25.8%]; P=.004]). Conclusions: Percutaneous dilational tracheotomy with bronchoscopic guidance is an efficacious and safe technique for maintaining airways in solid-organ transplant recipients who require prolonged mechanical ventilation, resulting in possible improvements in ventilatory mechanics and patient comfort.Item Late Intensive Care Unit Admission in Liver Transplant Recipients: 10-Year Experience(2015) Atar, Funda; Gedik, Ender; Kaplan, Serife; Zeyneloglu, Pinar; Pirat, Arash; Haberal, Mehmet; 0000-0002-3462-7632; 0000-0002-7175-207X; 0000-0003-2312-9942; 0000-0001-6762-895X; 26640903; AAJ-8097-2021; ABI-2971-2020; C-3736-2018; GLV-1652-2022Objectives: We evaluated late intensive care unit admission in liver transplant recipients to identify incidences and causes of acute respiratory failure in the postoperative period and to compare these results with results in patients who did not have acute respiratory failure. Materials and Methods: We retrospectively screened the data of 173 consecutive adult liver transplant recipients from January 2005 through March 2015 to identify patients with late admission (> 30 d posttransplant) to an intensive care unit. Patients were divided into 2 groups: patients with and without acute respiratory failure. Acute respiratory failure was defined as severe dyspnea, respiratory distress, decreased oxygen saturation, hypoxemia or hypercapnia on room air, or need for noninvasive or invasive mechanical ventilation. Demographic, laboratory, clinical, and respiratory data were collected. Model for End-Stage Liver Disease, Acute Physiology and Chronic Health Evaluation II, and Sequential Organ Failure Assessment scores; lengths of intensive care unit and hospital stays; and hospital mortality were assessed. Results: Among 173 patients, 37 (21.4%) were admitted to an intensive care unit, including 22 (59.5%) with acute respiratory failure. The leading cause of acute respiratory failure was pneumonia (n = 19, 86.4%). Patients with acute respiratory failure had significantly lower levels of albumin before intensive care unit admission (P =.003). In patients with acute respiratory failure, severe sepsis and septic shock were more frequently observed and tracheotomy was more frequently performed (P=.041). Conclusions: Acute respiratory failure developed in 59.5% of liver transplant recipients with late intensive care unit admission. The leading cause was pneumonia, with this group of patients having higher requirements for invasive mechanical ventilation and tracheotomy, longer stays in an intensive care unit, and higher mortality.Item Incidence of and Risk Factors for Prolonged Intensive Care Unit Stay After Open Heart Surgery Among Elderly Patients(2022) Yesiler, Fatma Irem; Akmatov, Nursultan; Nurumbetova, Oktom; Beyazpinar, Deniz Sarp; Sahinturk, Helin; Gedik, Ender; Zeyneloglu, Pinar; 0000-0003-0159-4771; 36540477; AAJ-1419-2021Objective: Open heart surgery (OHS) is frequently performed on elderly patients. We aimed to investigate the risk factors associated with prolonged intensive care unit (ICU) stay in elderly patients undergoing open heart surgery. Materials and Methods: Medical records of all patients > 75 years who underwent OHS (coronary artery bypass grafting (CABG) and/or heart valve surgery) between June 1, 2013, and December 31, 2020, were retrospectively analyzed. Those staying in the ICU longer than five days were determined as prolonged ICU stay. Patients were divided into two groups, according to ICU stay <5 days and >5 days. Results: Out of the 198 patients included in the study, 130 (65.7%) were male. Seventy patients (35.4%) had prolonged ICU stay. The mean age was higher in patients within the prolonged ICU stay group when compared to the other group (79.9 +/- 3.5 years vs.78.1 +/- 2.7 years, p<0.001). The patients who used statins and angiotensin-converting enzyme inhibitors (ACEi)/angiotensin receptor blockers (ARBs) in the preoperative period had a shorter ICU stay compared to those who did not (45% vs 31.4%, p=0.04; 57% vs 42.9%, p=0.03). The history of previous thoracic surgery (2.3% vs 10% p=0.03), emergency surgery (12.5% vs 24.5% p=0.04), and preoperative pacemaker usage (0.8% vs 7%, 1 p=0.01) were higher in the group of patients with prolonged ICU stay compared to the other group. Preoperative ejection fraction (EF)% (47.7 +/- 11.3 vs 51.1 +/- 8.8, p<0.001) and hemoglobin level (11.8 +/- 1.9 mg/dL vs 12.9 +/- 1.6, p<0.001) were lower in the group with prolonged ICU stay compared to the other group. Incidence of cardiac arrest (3.9% vs 15.7% p=0.006), presence of arrhythmia (16.4% vs 41.6%,p<0.001), frequency of pacemaker and intra-aortic balloon pump (IABP) usage (0 vs 10% p=0.002; 1.6% vs 8.6% p=0.02), and need for renal replacement therapy (3.1% vs 12.9%,p=0.02) were higher in the group with prolonged ICU stay compared to the other group. According to the logistic regression analysis; higher age (OR: 1.225, 95%CI 1.104-1.360, p<0.001), preoperative pacemaker usage (OR: 0.100, 95%CI 0.01-0.969, p<0.04), preoperative statin non-use (OR: 2.056, 95%CI 1.040-4.066, p<0.03) and preoperative low EF (OR: 0.947, 95%CI 0.915-0.981, p=0.002) were determined as independent risk factors for prolonged ICU stay. Conclusion: The incidence of prolonged ICU stay after OHS among patients >75 years was 35.4% in our cohort. Higher age, preoperative pacemaker usage, preoperative statin non-use, and low preoperative EF were associated with prolonged ICU stay.Item The Clinical Outcomes of Covid-19 Disease in Patients with Solid Organ Transplantation(2021) Yuce, Gulbahar Darilmaz; Ulubay, Gaye; Karakaya, Emre; Tek, Korhan; Akdur, Aydincan; Bozbas, Serife Savas; Gedik, Ender; Kupeli, Elif; Erol, Cigdem; Arslan, Hande; Akcay, Sule; Haberal, Mehmet; https://orcid.org/0000-0002-4879-7974; https://orcid.org/0000-0002-8726-3369; https://orcid.org/0000-0002-2535-2534; https://orcid.org/0000-0002-5708-7915; https://orcid.org/0000-0002-3462-7632; JBS-4193-2023; AAD-5466-2021; AAA-3068-2021; AAJ-1219-2021; ABG-7034-2021; AAJ-8097-2021Item Venoarterial Extracorporeal Membrane Oxygenation Support As A Bridge To Heart Transplantation: Report of Three Cases(2016) Gedik, Ender; Ulas, Aydin; Ersoy, Ozgur; Atar, Funda; Firat, Aynur Camkiran; Zeyneloglu, Pinar; Sezgin, Atilla; Pirat, Arash; https://orcid.org/0000-0002-7175-207X; ABI-2971-2020
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