Yazar "Ogut, Zeki" seçeneğine göre listele
Listeleniyor 1 - 8 / 8
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Assessment of Liver Regeneration in Patients Who Have Undergone Living Donor Hepatectomy for Living Donor Liver Transplantation(Mdpi, 2023) Satilmis, Basri; Akbulut, Sami; Sahin, Tevfik Tolga; Dalda, Yasin; Tuncer, Adem; Kucukakcali, Zeynep; Ogut, ZekiBackground: Inflammation and the associated immune pathways are among the most important factors in liver regeneration after living donor hepatectomy. Various biomarkers, especially liver function tests, are used to show liver regeneration. The aim of this study was to evaluate the course of liver regeneration following donor hepatectomy (LDH) by routine and regeneration-related biomarkers. Method: Data from 63 living liver donors (LLDs) who underwent LDH in Inonu University Liver Transplant Institute were prospectively analyzed. Serum samples were obtained on the preoperative day and postoperative days (POD) 1, 3, 5, 10, and 21. Regenerative markers including alfa-fetoprotein (AFP), des carboxy prothrombin (DCP), ornithine decarboxylase (ODC), retinol-binding protein 4 (RBP4), and angiotensin-converting enzyme isotype II (ACEII) and liver function tests including alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), alkaline phosphatase (ALP) and total bilirubin levels were all analyzed. Results: The median age of the LLDs was 29.7 years and 28 LLDs were female. Eight LLDs developed postoperative complications requiring relaparotomy. The routine laboratory parameters including AST (<0.001), ALT (<0.001), ALP (<0.001), and total bilirubin (<0.001) showed a significant increase over time until postoperative day (POD) 3. For the regeneration-related parameters, except for the RBP4, all parameters including ACEII (p = 0.006), AFP (p = 0.002), DCP (p = 0.007), and ODC (p = 0.002) showed a significant increase in POD3. The regeneration parameters showed a different pattern of change. In right-lobe liver grafts, ACEII (p = 0.002), AFP (p = 0.035), and ODC (p = 0.001) showed a significant increase over time. DCP (p = 0.129) and RBP4 (p = 0.335) showed no significant changes in right-lobe liver grafts. Conclusions: Regenerative markers are increased in a sustained fashion following LDH. This is more prominent following right-lobe grafts which are indicative of progenitor-associated liver regeneration.Öğe Concomittant Liver Transplantation and Low Anterior Resection in Patient with Neuroendocrine Tumor and Chronic Hepatitis B Infection(Springer, 2022) Tuncer, Adem; Ogut, Zeki; Usta, Sertac; Akbulut, Sami; Sahin, Tevfik Tolga; Yilmaz, Sezai[Abstract Not Available]Öğe The Effect of Pringle Maneuver Applied during Living Donor Hepatectomy on the Ischemia-Reperfusion Injury Observed in the Donors and Recipients(Mdpi, 2024) Dalda, Yasin; Akbulut, Sami; Sahin, Tevfik Tolga; Tuncer, Adem; Ogut, Zeki; Satilmis, Basri; Dalda, OzlemBackground and Objectives: The aim of this study is to evaluate the clinical and laboratory changes of ischemia and reperfusion injury in the remnant livers of donors with and without Pringle maneuver. Furthermore, we evaluated the recipients who have been transplanted with liver grafts from these donors. Methods and Materials: A total of 108 patients (54 living liver donors and 54 liver recipients) who underwent donor hepatectomy and recipients who living donor liver transplantation, were included in this randomized double-blind study between February 2021 and June 2021. The donors were divided into two groups: Pringle maneuver applied (n = 27) and Pringle maneuver not applied (n = 27). Similarly, recipients with implanted liver obtained from these donors were divided into two groups as the Pringle maneuver was performed (n = 27) and not performed (n = 27). Blood samples from donors and recipients were obtained on pre-operative, post-operative 0 h day (day of surgery), post-operative 1st day, post-operative 2nd day, post-operative 3rd day, post-operative 4th day, post-operative 5th day, and liver tissue was taken from the graft during the back table procedures. Liver function tests and complete blood count, coagulation tests, IL-1, IL-2, IL-6, TNF-alpha, and beta-galactosidase measurements, and histopathological findings were examined. Results: There was no statistically significant difference in the parameters of biochemical analyses for ischemia-reperfusion injury at all periods in the donors with and without the Pringle maneuver. Similarly, there was no statistically significant difference between in the recipients in who received liver grafts harvested with and without the Pringle maneuver. There was no statistically significant difference between the two recipient groups in terms of perioperative bleeding and early bile duct complications (p = 0.685). In the histopathological examinations, hepatocyte damage was significantly higher in the Pringle maneuver group (p = 0.001). Conclusions: Although the histological scoring of hepatocyte damage was found to be higher in the Pringle maneuver group, the Pringle maneuver did not augment ischemia-reperfusion injury in donors and recipients that was evaluated by clinical and laboratory analyses.Öğe Effect of the COVID-19 pandemic on patients with presumed diagnosis of acute appendicitis(Baishideng Publishing Group Inc, 2022) Akbulut, Sami; Tuncer, Adem; Ogut, Zeki; Sahin, Tevfik Tolga; Koc, Cemalettin; Guldogan, Emek; Karabulut, ErtugrulBACKGROUNDAcute appendicitis (AAp) is the most frequent cause of acute abdominal pain, and appendectomy is the most frequent emergency procedure that is performed worldwide. The coronavirus disease 2019 (COVID-19) pandemic has caused delays in managing diseases requiring emergency approaches such as AAp and trauma.AIMTo compare the demographic, clinical, and histopathological outcomes of patients with AAp who underwent appendectomy during pre-COVID-19 and COVID-19 periods.METHODSThe demographic, clinical, biochemical, and histopathological parameters were evaluated and compared in patients who underwent appendectomy with the presumed diagnosis of AAp in the pre-COVID-19 (October 2018-March 2020) and COVID-19 (March 2020-July 2021) periods.RESULTSAdmissions to our tertiary care hospital for AAp increased 44.8% in the COVID-19 period. Pre-COVID-19 (n = 154) and COVID-19 (n = 223) periods were compared for various parameters, and we found that there were statistically significant differences in terms of variables such as procedures performed on the weekdays or weekends [odds ratio (OR): 1.76; P = 0.018], presence of AAp findings on ultrasonography (OR: 15.4; P < 0.001), confirmation of AAp in the histopathologic analysis (OR: 2.6; P = 0.003), determination of perforation in the appendectomy specimen (OR: 2.2; P = 0.004), the diameter of the appendix (P < 0.001), and hospital stay (P = 0.003). There was no statistically significant difference in terms of interval between the initiation of symptoms and admission to the hospital between the pre-COVID-19 (median: 24 h; interquartile range: 34) and COVID-19 (median: 36 h; interquartile range: 60) periods (P = 0.348). The interval between the initiation of symptoms until the hospital admission was significantly longer in patients with perforated AAp regardless of the COVID-19 or pre-COVID-19 status (P < 0.001).CONCLUSIONThe present study showed that in the COVID-19 period, the ultrasonographic determination rate of AAp, perforation rate of AAp, and duration of hospital stay increased. On the other hand, negative appendectomy rate decreased. There was no statistically significant delay in hospital admissions that would delay the diagnosis of AAp in the COVID-19 period.Öğe High-Level Procalcitonin in Patient with Mixed Fibrolamellar Hepatocellular Carcinoma: A Case Report and Literature Review(Springer, 2022) Akbulut, Sami; Tuncer, Adem; Ogut, Zeki; Sahin, Tevfik Tolga; Koc, Cemalettin[Abstract Not Available]Öğe Management of irreducible giant rectal prolapse: A case report and literature review(Elsevier Sci Ltd, 2021) Tuncer, Adem; Akbulut, Sami; Ogut, Zeki; Sahin, Tevfik TolgaIntroduction and importance: Rectal prolapse is defined as herniation of mucosa or full-thickness of the rectal wall through the anal canal. It has a negative impact on the quality of life and therefore, it should be treated as soon as diagnosis is confirmed. Definitive treatment is surgical and it depends on the clinical characteristics of the patients. We aimed to present the one of the largest rectal prolapse case in the literature. Case presentation: A 32-years-old male patient with a history of severe constipation was admitted to our institution with a giant rectal prolapse. The prolapsed segment was incarcerated, and a semi-emergent procedure was performed though a mid-line laparotomy. The sigmoid colon was redundant and therefore sigmoid colon and the upper two thirds of rectum were resected and end to end anastomosis was performed. The patient was discharged postoperative day 7 without any complication. Clinical discussion: Rectal prolapse has a negative impact on quality of life and should be operated as soon as the diagnosis is reached. The surgical strategy depends on the compliance of the patient as well as the experience of the surgical team. Conclusion: Clinicians should know that chronic constipation together with other factors may result in rectal prolapse which may become disproportionately large in size.Öğe De Novo Malignancies After Liver Transplantation: Experience of a High-Volume Center(Springer, 2022) Saglam, Kutay; Sahin, Tevfik Tolga; Ogut, Zeki; Ince, Volkan; Usta, Sertac; Yilmaz, SezaiPurpose Patient care, newer immunosuppressive medications, and advances in surgical technique, have resulted in significant prolongation of survival after liver transplantation in recent years. However, as life expectancy increased and the early mortality rates have decreased, different problems have evolved due to chronic immunosuppressive therapy. The aim of the present study is to evaluate patients who were transplanted and then developed de novo malignancies, in terms of the type of malignancies and the follow-up period. Methods The study was conducted on 2814 patients who received liver transplantation between 2008 and 2020 in Inonu University Liver Transplant Institute. In total, the data of 23 patients were evaluated retrospectively. Results Non-melanoma skin cancer was the most common de novo malignancy (21.7%), followed by gynecological cancers (17.3%). The interval between the time of transplantation until the development of de novo malignancy was 36 (6-75) months. The median follow-up period after the diagnoses of the de novo malignancies was 4.11 years. One, 3-, 5-year survival rates of patients after the diagnoses of de novo malignancies were 69.6%, 56.5%, and 41.9%; respectively. Conclusion Non-melanotic skin cancers were the most common de novo cancers in liver transplant recipients. A strict surveillance program is very important in the follow-up of liver transplant recipients.Öğe Very Rare Recurrence Site of Hepatocellular Carcinoma After Living Donor Liver Transplantation: Subcutaneous Abdominal Drain Tract(Springer, 2021) Ogut, Zeki; Kilci, Burak; Ince, Volkan; Koc, Cemalettin; Isik, Burak; Yilmaz, Sezai[Abstract Not Available]
