Publications by authors named "Chien Chuan Chen"

Article Synopsis
  • The study focused on patients who experienced reflux symptoms unresponsive to proton-pump inhibitors (PPIs) and aimed to determine the prevalence and characteristics of functional esophageal disorders (FED) in this group.
  • Of the 190 patients analyzed, a significant majority (83.2%) were diagnosed with FED, primarily functional heartburn and reflux hypersensitivity, compared to a smaller subgroup (16.8%) with non-erosive reflux disease (NERD).
  • Findings indicated that individuals with FED had a lower body mass index and a higher incidence of psychological issues and poor sleep quality, which were closely linked to the severity of their reflux symptoms.
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Study Objectives: The relationship between obstructive sleep apnea (OSA) and gastroesophageal reflux disease (GERD) is complex. We aimed to determine the association of self-reported and objective sleep parameters with diverse manifestations of the GERD spectrum.

Methods: We prospectively recruited 561 individuals who underwent an electrocardiogram-based cardiopulmonary coupling for OSA screening during a health check-up.

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Background: Esophageal diverticulum (ED) is an uncommon structural disorder with heterogenous manifestations and elusive pathophysiology. Our aim was to investigate esophageal motility and associated symptom profiles in patients with ED based on high-resolution impedance manometry (HRIM).

Methods: Consecutive patients with ED referred to our motility laboratory between 2015 to 2022 were identified in our electronic database.

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Background/purpose: Peroral endoscopic myotomy (POEM), a novel minimally invasive treatment for esophageal achalasia, has been shown to be effective and safe for both adult and pediatric patients. However, studies on its application in children in Taiwan and its impact on growth and esophageal motility are lacking.

Methods: We conducted a retrospective study on consecutive pediatric patients who were diagnosed with esophageal achalasia at National Taiwan University Hospital and underwent POEM during 2015-2022.

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Background: Helicobacter pylori infection is an important causal factor of gastric cancer and peptic ulcer disease and is associated with immune thrombocytopenic purpura and functional dyspepsia. In H pylori strains, point mutations in the 23S rRNA and gyrA genes are associated with clarithromycin resistance and levofloxacin resistance, respectively. Whether the efficacy of molecular testing-guided therapy is non-inferior to that of susceptibility testing-guided therapy for H pylori eradication is unclear.

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Article Synopsis
  • The study investigates how achalasia, a condition that causes food to stay in the esophagus, affects the esophageal microbiome and how this microbiome changes after a specific surgical treatment called peroral endoscopic myotomy (POEM).
  • Researchers compared the microbiome of achalasia patients to that of healthy individuals and found distinct differences, including increased levels of the bacteria Lactobacillus in achalasia patients, which correlated with the severity of their condition.
  • After undergoing POEM, patients showed an increase in the bacteria Neisseria and a decrease in Lactobacillus and Bacteroides, highlighting a shift in the microbiome that may have implications for recovery and long
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Background: Levofloxacin-based therapy or bismuth-based quadruple therapy are the recommended second-line regimens for Helicobacter pylori eradication after failure of clarithromycin-based therapy. However, resistance to levofloxacin has increased in the past decade. Furthermore, little is known about the long-term effects of H pylori eradication on the antibiotic resistome.

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Background: Anti-reflux mucosal intervention (ARMI), including anti-reflux mucosectomy (ARMS) and anti-reflux mucosal ablation (ARMA), is a promising endoscopic treatment for gastroesophageal reflux disease (GERD). Few studies reported a detailed analysis of the objective reflux parameters.

Methods: Patients with chronic PPI-dependent GERD and receiving ARMI were prospectively enrolled.

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Introduction: The pathophysiology of functional dysphagia as defined by the updated Rome IV criteria is complex and remains largely unknown. We aimed to investigate its clinical characteristics and its association with psychosocial comorbidities.

Methods: Consecutive patients referred to our motility laboratory for evaluation of esophageal dysphagia were identified.

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Background And Aim: The small endoscopic ultrasound (EUS)-suspected gastric gastrointestinal stromal tumors (GISTs), gastric subepithelial tumors at the muscularis propria layer on EUS, are detected frequently. Bite-on-bite forceps biopsy and EUS-guided tissue sampling yield variable results. This study aimed to analyze clinicopathologic features of the small EUS-suspected gastric GISTs 2 cm or less in size and to evaluate the efficacy and safety of the endoscopic incisional biopsy (EIB) for these small tumors.

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Context: Previous cross-sectional studies show diabetes and higher levels of plasma hemoglobin A1c (HbA1c) are associated with a higher prevalence of gastrointestinal (GI) complications. However, whether the glycemic status is associated with incident acid-related upper GI disorders remains unclear.

Objective: We aimed to determine the effect of hyperglycemia per se, in terms of HbA1c, on the incidence of acid-related disorders.

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Achalasia, a rare primary esophageal motility disorder, is often misdiagnosed as refractory gastroesophageal reflux disease (GERD). This study is aimed to identify the clinical and histopathologic features that may help to differentiate these two entities. Patients with untreated achalasia and those with refractory reflux symptoms despite ≥8 weeks of proton-pump inhibitor treatment were enrolled prospectively.

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Background/objective: Peroral endoscopic myotomy (POEM), a novel minimally invasive treatment for esophageal achalasia, is becoming more popular globally because of its efficacy and safety. We aimed to clarify the technical concerns, efficacy, and safety of POEM for treating esophageal achalasia in Taiwan.

Methods: We conducted a retrospective study on consecutive patients with achalasia who underwent POEM between October 2016 and May 2021 at three medical centers in Taiwan.

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Due to the dense structure of ultra-high-performance concrete (UHPC), it is prone to explosive spalling at high temperatures. In this paper, flexural testing of UHPC and high-strength concrete (HSC) beams was carried out at room temperature and after being subjected to different levels of thermal exposure (300-500 °C). The cross-section of the beam specimen was 150 (width) × 200 (depth) mm, and its length was 1500 mm.

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Background And Aims: Intrapapillary capillary loops (IPCLs) are microvascular structures that correlate with the invasion depth of early squamous cell neoplasia and allow accurate prediction of histology. Artificial intelligence may improve human recognition of IPCL patterns and prediction of histology to allow prompt access to endoscopic therapy for early squamous cell neoplasia where appropriate.

Methods: One hundred fifteen patients were recruited at 2 academic Taiwanese hospitals.

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Background/purpose: The choice of endoscopic submucosal dissection (ESD) as first line treatment for selected early gastric cancer (EGC) patients was proved as effective as surgical treatment in studies over many countries. Yet there is no such cohort comparison in Taiwan. This study is aimed to describe our experience in ESD treated EGC and to compare the outcomes with those underwent surgical treatment.

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Background: In first-line treatment of Helicobacter pylori, we have previously shown that the eradication frequency was 83·7% (95% CI 80·4-86·6) for triple therapy for 14 days (T14; lansoprazole 30 mg, amoxicillin 1 g, and clarithromycin 500 mg, all given twice daily), 85·9% (82·7-88·6) for concomitant therapy for 10 days (C10; lansoprazole 30 mg, amoxicillin 1 g, clarithromycin 500 mg, and metronidazole 500 mg, all given twice daily), and 90·4% (87·6-92·6) for bismuth quadruple therapy for 10 days (BQ10; bismuth tripotassium dicitrate 300 mg four times a day, lansoprazole 30 mg twice daily, tetracycline 500 mg four times a day, and metronidazole 500 mg three times a day). In this follow-up study, we assess short-term and long-term effects of these therapies on the gut microbiota, antibiotic resistance, and metabolic parameters.

Methods: This was a multicentre, open-label, randomised trial done at nine medical centres in Taiwan.

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Background: Administration of propofol, especially rapid administration, decreases patient cardiac output (CO) to various degrees. CO might influence the buildup of an effective drug level within the neuromuscular junction and affect the onset time of neuromuscular blockers. The present study aimed to investigate the effects of different infusion rates of propofol on patient CO and the onset time of rocuronium.

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Introduction: Bowel perforation is a potential complication of colonoscopy, and colonoscopic polypectomy has a higher risk. Perforation may be responsible for abdominal compartment syndrome (ACS), which causes multiple organ dysfunction.

Case Presentation: Here, we have described the case of a woman who underwent colonoscopic polypectomy.

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Background: Postherpetic neuralgia, a persistent pain condition often characterized by allodynia and hyperalgesia, is a deleterious consequence experienced by patients after an acute herpes zoster vesicular eruption has healed. The pain associated with postherpetic neuralgia can severely affect a patient's quality of life, quality of sleep, and ability to participate in activities of daily living. Currently, first-line treatments for this condition include the administration of medication therapies such as tricyclic antidepressants, pregabalin, gabapentin, and lidocaine patches, followed by the application of tramadol and capsaicin creams and patches as second- or third-line therapies.

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Background/purpose: Although performing balloon enteroscopy soon after the onset of small bowel bleeding appeared to enhance diagnostic rate, the optimal timing was unclear.

Methods: A retrospective cohort study in a single referral center. Patients with overt, suspected small bowel bleeding who underwent primary single-balloon enteroscopy (SBE) were evaluated to determine the association between procedure timing and diagnostic yield rates.

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Background: Esophageal motility disorders are the major cause of non-obstructive dysphagia (NOD), but may be underdiagnosed. In this high-resolution impedance manometry (HRIM)-based study, we aimed to clarify the etiologies and clinical characteristics of patients presenting with NOD in a Taiwanese population.

Methods: From October 2014 to July 2017, consecutive patients with the chief complaint of dysphagia were prospectively enrolled in the study at a tertiary medical center.

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