Publications by authors named "Chan Hyuk Park"

Background: The feasibility of performing complete endoscopic retrograde cholangiopancreatography (ERCP) for acute cholangitis during weekends or holidays remains controversial due to concerns over increased risks of adverse events (AEs) in off-hour procedures.

Objectives: To evaluate whether weekend drainage-only ERCP affects the incidence of AEs compared to standard weekday ERCP, and to identify risk factors for post-ERCP pancreatitis (PEP).

Design: Prospective observational study.

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Objectives: Gastric subepithelial lesions (SELs) are elevated lesions covered by normal mucosa often detected during esophagogastroduodenoscopy. Because of its submucosal location, accurate diagnosis through biopsy is challenging. We conducted a nationwide survey to identify differences in clinical practices across healthcare institutions with varying medical resources in Korea.

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Objectives: Associated factors for the failure of (HP) eradication have been evaluated in many studies; however, the different study population of previous studies prevents us from understanding the comparative risk between factors. We aimed to comprehensively investigate factors associated with successful HP eradication based on a single study population.

Methods: We retrospectively reviewed the medical records of adults diagnosed with HP infection between March 2021 and October 2022 at Hanyang University Guri Hospital.

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Maintenance therapy is crucial in managing and preventing symptom relapse in gastroesophageal reflux disease (GERD), with continuous and on-demand therapy being the common approaches. However, maintenance therapy using potassium-competitive acid blockers (P-CABs), such as fexuprazan, remains incompletely evaluated. This single-center, single-arm, prospective cohort study enrolled individuals with weekly heartburn or acid regurgitation and confirmed erosive esophagitis.

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Introduction: Post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) is the most common serious adverse event after endoscopic retrograde cholangiopancreatography (ERCP). Although retrospective models to predict PEP have shown promise, their real-world applicability remains uncertain. Thus, we used prospectively derived cohort data to validate current prediction models.

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Article Synopsis
  • Tegoprazan is a potassium-competitive acid blocker that may work as an alternative to proton pump inhibitors for treating Helicobacter pylori infections, particularly in areas like Korea with high clarithromycin resistance.
  • A study analyzed two therapies: a 10-day tegoprazan-based concomitant therapy and a 14-day bismuth quadruple therapy, finding similar effectiveness in eradicating H. pylori (74.7% success rate for both), but higher adverse events and medication issues in the bismuth group.
  • Concluding that the shorter duration and lower side effect profile of tegoprazan-based concomitant therapy make it a potentially better option, especially in regions with prevalent clar
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Background And Aims: Difficult biliary cannulation is an independent risk factor for post-ERCP pancreatitis (PEP); however, there is a noticeable lack of studies focusing on the incidence and risk factors of PEP among patients undergoing easy cannulation. Therefore, we systematically investigated the risk factors for PEP in patients who underwent easy cannulation.

Methods: We prospectively enrolled patients with naive major papillae who underwent diagnostic or therapeutic ERCP between June 2018 and June 2023.

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Introduction: Helicobacter pylori infects over 50% of the global population, prompting the issuance of guidelines for effective diagnosis and treatment. However, research on guideline dissemination and adherence is limited. Therefore, we assessed the nationwide status of H.

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Article Synopsis
  • Tegoprazan, a new acid blocker, was compared to rabeprazole in treating Helicobacter pylori infections, with a focus on effectiveness in real-world settings.
  • An analysis of 1,474 patients showed similar eradication rates for both medications, with tegoprazan at 74.7% and rabeprazole at 72.7%, indicating no significant difference.
  • Although there were no major differences in overall adverse events, tegoprazan resulted in fewer cases of abdominal discomfort compared to rabeprazole, prompting suggestions for further research on its application in different treatment regimens.
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  • Lumen-apposing metal stents (LAMSs) were studied against plastic stents for treating infected walled-off necrosis (WON), focusing on their safety and efficacy.
  • The study included 46 patients, finding no significant difference in the total number of endoscopic necrosectomy procedures required between the two groups, but LAMS showed a higher clinical success rate at 8 weeks.
  • LAMS treatment led to no adverse events, while one patient with a plastic stent experienced significant bleeding.
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This review delved into the intricate relationship between the gastrointestinal microbiome and gastric cancer, particularly focusing on post-treatment alterations, notably following gastrectomy, and the effects of anticancer therapies. Following gastrectomy, analysis of fecal samples revealed an increased presence of oral cavity aerotolerant and bile acid-transforming bacteria in the intestine. Similar changes were observed in the gastric microbiome, highlighting significant alterations in taxon abundance and emphasizing the reciprocal interaction between the oral and gastric microbiomes.

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Background: Gallstones are a well-known risk factor for acute cholecystitis. However, their role as a risk factor for gallbladder perforation (GBP) remains unclear. Therefore, this study aimed to determine the effect of gallstones on the development of GBP.

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With an aging population, the number of patients with difficulty swallowing due to medical conditions is gradually increasing. In such cases, enteral nutrition is administered through a temporary nasogastric tube. Long-term use of a nasogastric tube leads to various complications and a decreased quality of life.

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With an aging population, the number of patients with difficulty in swallowing due to medical conditions is gradually increasing. In such cases, enteral nutrition is administered through a temporary nasogastric tube. However, the long-term use of a nasogastric tube leads to various complications and a decreased quality of life.

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Article Synopsis
  • Ranitidine, a commonly used medication for stomach issues, was recalled in 2020 due to the discovery of a cancer-causing impurity, raising concerns about its link to cancer among users.
  • This study aimed to investigate the cancer risk associated with ranitidine compared to other similar medications known as H2 receptor antagonists.
  • Conducted across multiple countries and databases with a large sample size, the research compared cancer incidence in new users of ranitidine against those using alternatives while accounting for various factors to ensure accurate results.
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Background: The lack of well-established operational definitions is a major limitation of eradication studies that use secondary databases. We aimed to develop and validate operational definitions related to eradication therapy.

Methods: Operational definitions were developed by analyzing a nationwide eradication registry and validated using real-world data from hospital medical records.

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Background And Aims: Pancreatic steatosis (PS) may be a risk factor for acute pancreatitis. Whether it is also a risk factor for post-ERCP pancreatitis (PEP) has not been evaluated. This study aimed to determine the impact of PS on PEP development.

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In recent years, significant translational research advances have been made in the upper gastrointestinal (GI) research field. Endoscopic evaluation is a reasonable option for acquiring upper GI tissue for research purposes because it has minimal risk and can be applied to unresectable gastric cancer. The optimal number of biopsy samples and sample storage is crucial and might influence results.

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Introduction: Potassium-competitive acid blockers and proton pump inhibitors/sodium bicarbonate can rapidly increase intragastric pH. In this study, we aimed to compare the clinical outcomes of tegoprazan-based and esomeprazole/sodium bicarbonate-based triple therapies in the treatment of Helicobacter pylori infection.

Methods: We retrospectively reviewed the data of patients with H.

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Background: Several studies have suggested that the mucosal protective effects of proton pump inhibitors (PPIs) do not extend beyond the duodenum; however, PPIs may cause lower gastrointestinal (LGI) injury, although these relationships have not yet been fully elucidated.

Methods: We searched all the relevant studies published until September 2022 that examined the risk of PPIs for LGI bleeding. We performed a meta-analysis of the risk of LGI bleeding (small bowel (SB) or colorectal bleeding) between PPI users and non-users.

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With an aging population, the number of patients with difficulty in swallowing due to medical conditions is gradually increasing. In such cases, enteral nutrition is administered through a temporary nasogastric tube. However, the long-term use of a nasogastric tube leads to various complications and a decreased quality of life.

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Article Synopsis
  • This study compared the effectiveness of a polysaccharide hemostatic powder (PHP) to traditional endoscopic treatments for treating peptic ulcer bleeding (PUB) in a multi-center trial.
  • It involved 216 patients and found that both treatment groups achieved similar rates of initial hemostasis, but the PHP showed superior results in specific cases (Forrest IIa), with no reported adverse events related to PHP.
  • The study concluded that PHP is a viable option for initial treatment of PUB and highlighted the need for further research on its long-term effectiveness regarding re-bleeding rates.
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It is debatable which needle has clear superiority of diagnostic performance in endoscopic ultrasound (EUS)-guided fine needle biopsy (FNB) of solid pancreatic masses. This study aimed to compare the performance of three needles and determine the variables that affect diagnostic accuracy. From March 2014 to May 2020, 746 patients with solid pancreatic masses who underwent EUS-FNB using three types of needles (Franseen needle, Menghini-tip needle, and Reverse-bevel needle) were retrospectively reviewed.

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Background/aims: Tegoprazan, a new, fast, and strong potassium-competitive acid blocker, has been approved for the treatment of gastric acid-related diseases in Korea. However, real-world clinical data regarding this drug are scarce. We aimed to compare the eradication rates of tegoprazan- and rabeprazole-based triple therapy.

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