Osman Özdoğan

Prof. Dr. Osman Özdoğan


Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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2 March 2021 in Digestive Diseases and Sciences
Verified
Journal Article
Closed access
PDF file
OSOrhan Sezgin
Orhan Sezgin
SYSerkan Yaraş
Serkan Yaraş
OÖOsman Özdoğan
Osman Özdoğan

15 November 2024 in Turkish Journal of Gastroenterology
Verified
Journal Article
Open access
DKDeniz Öğütmen Koç
Deniz Öğütmen Koç
GBGöksel Bengi
Göksel Bengi
ÖGÖzlem Gül
Özlem Gül
YAYeşim Özen Alahdab
Yeşim Özen Alahdab
EAEngin Altıntaş
Engin Altıntaş
OSOrhan Sezgin
Orhan Sezgin
Acute pancreatitis (AP) is a clinical condition that arises acutely in the pancreas through various inflammatory pathways due to multiple causes. Turkish Society of Gastroenterology Pancreas Working Group developed comprehensive guidance statements regarding the management of AP that include its epidemiology, etiology, clinical presentation, diagnostic criteria, disease severity, treatment, prognosis, local and systemic complications. The statements were developed through literature review, deliberation, and consensus opinion. These statements were ultimately used to develop a conceptual framework for the multidisciplinary management of AP. Cite this article as: Öğütmen Koç D, Bengi G, Gül Ö, et al. Turkish society of gastroenterology: Pancreas working group, acute pancreatitis committee consensus report. Turk J Gastroenterol. 2024;35(S1):S1-S44.

25 July 2019 in Turkish Journal of Gastroenterology
Verified
Journal Article
Open access
OSOrhan Sezgin
Orhan Sezgin
OÖOsman Özdoğan
Osman Özdoğan
SYSerkan Yaraş
Serkan Yaraş
EÜEnver Üçbilek
Enver Üçbilek
EAEngin Altintas
Engin Altintas
Background/Aims: This study aimed to determine the frequency of hypertriglyceridemia (HTG)-induced acute pancreatitis (AP) and assess different clinical and prognostic features in these patients. Materials and Methods: The patients who were hospitalized with AP due to HTG (HTG-AP) between January 2005 and December 2014 were retrospectively evaluated in the clinic. The patients with AP due to non-HTG (non-HTG-AP) were also investigated during the same period. Results: Of 635 patients with AP admitted to the clinic, 33 (5.2%) had HTG-related AP. Mean triglyceride levels were 2653 mg/dL (range: 439-13700 mg/dL). Mean Ranson score at the time of admission was 1.5, and the APACHE II score was 4.63. The mean duration of hospitalization was 4.4 days (range: 2-14 days). One of these patients died on the sixth day of hospitalization due to multiple-organ failure. Patients with a triglyceride level of >1000 mg/dL were younger, had a longer hospital stay, and had a higher recurrence rate. Compared with non-HTG-AP, HTG-AP was observed at a younger age (57.4±17.3 vs. 37.6±14.8, pConclusion: HTG-AP was observed at a younger age and was responsible for most cases of recurrent pancreatitis. The duration of hospitalization was long, and the risk of recurrence and mortality were high in patients with HTG-AP having a triglyceride level >1000 mg/dL. Cite this article as: Sezgin O, Özdoğan O, Yaraş S, Üçbilek E, Altıntaş E. Evaluation of hypertriglyceridemia-induced acute pancreatitis: A single tertiary care unit experience from Turkey. Turk J Gastroenterol 2019; 30(3): 271-7.

1 June 2012
Verified
Journal Article
Closed access
AOAlper Ozel
Alper Ozel
GTGuzide Toksoy
Guzide Toksoy
OÖOsman Özdoğan
Osman Özdoğan
AMAbdullah Soydan Mahmutoglu
Abdullah Soydan Mahmutoglu
ZKZeki Karpat
Zeki Karpat

15 May 2020 in Turkish Journal of Gastroenterology
Verified
Journal Article
Closed access
OÖOsman Özdoğan
Osman Özdoğan
SYSerkan Yaraş
Serkan Yaraş
FAFehmi Ateş
Fehmi Ateş
EÜEnver Üçbilek
Enver Üçbilek
OSOrhan Sezgin
Orhan Sezgin
EAEngin Altintas
Engin Altintas
Background/Aims: In previous studies that investigated the impact of direct-acting antiviral (DAA) treatment on lipid metabolism and insulin resistance in chronic hepatitis C patients have been compared to baseline values with either end of treatment or post-treatment values. The results are inconsistent. We evaluated patients throughout the treatment and after treatment. Materials and Methods: 121 patients were included in the study. 93 patients were treated with sofosbuvir/ledipasvir±Ribavirin (RBV), and 28 patients were treated with ombitasvir/paritaprevir/ritonavir+dasabuvir±RBV. Total cholesterol (TC), low-density lipoprotein (LDL), triglycerides (TG) and homeostatic model assessment-insulin resistance (HOMA-IR) levels were measured at the onset of treatment, after the1st month of treatment, at the end of treatment, and 6 and 12 months after the end of treatment. Results: 117 patients were genotype 1. Sustained virological response was 98.4%. HOMA-IR values during treatment were significantly higher than at the beginning of treatment (p=0.0001). At 12 months there was a decrease in HOMA-IR, but this was not statistically significant (p=0.2048). TC and LDL levels were significantly increased in the first month of treatment (TC; 159±30, 180±34 mg/dl; LDL; 84±28, 100±30 mg/dl, respectively) (p<0.0001) and this increase was present during and after treatment. There was no statistically significant increase in TG (p=0120). Both treatment regimens showed similar effects on HOMA-IR, TC, and LDL. Conclusion: Patients with HCV treated with DAAs drugs showed increased IR, TC, and LDL cholesterol levels during treatment. After the end of treatment, IR goes back to normal, while the elevated TC and LDL levels persist indefinitely.

1 January 2016 in TURKISH JOURNAL OF MEDICAL SCIENCES
Verified
Journal Article
Closed access
EÜEnver Üçbi̇lEk
Enver Üçbi̇lEk
BABahri Abayli
Bahri Abayli
MKMahmut Bakır KOYUNCU
Mahmut Bakır KOYUNCU
DMDurdane Midikli
Durdane Midikli
SGSüveyda Gözüküçük
Süveyda Gözüküçük
OSOrhan Sezgi̇n
Orhan Sezgi̇n
Background/aim: The most common hepatitis C virus (HCV) genotype in Turkey is genotype 1. However, there has not been a study about the distribution of HCV genotypes among intravenous drug users (IVDUs) in the Cukurova region of Turkey. This study was planned to understand if there is a difference between IVDUs and the normal population. Materials and methods: Between May 2010 and May 2014, anti-HCV positive IVDUs who applied to the 6 hospitals in the Cukurova region of Turkey were included in this study. Their HCV genotypes were studied. Results: Ninety-seven anti-HCV positive IVDUs were screened in terms of HCV RNA and genotype. Ten were excluded from the study because their HCV RNA results were negative. Fifty-one of the 87 patients (58.6%) had genotype 3. Genotype 2 was detected in 26 (29.9%) and genotype 1 was detected in 10 (11.5%) patients. Conclusion: HCV genotypes seem to be different between the normal population and IVDUs according to studies worldwide. Among IVDUs, we detected a dominance of genotype 3 and genotype 2, which is apparently different from the normal population. The reason for this difference can be simply explained by infection through shared needles. However, there may still be a different immunological response in IVDUs, the investigation of which may lead to further studies.