Publications by authors named "Carlos Robles-Medranda"

Background And Study Aims: Gastroesophageal reflux (GERD) can occur in a significant number of achalasia patients undergoing post-peroral endoscopic myotomy (POEM). POEM with endoscopic fundoplication (POEM-F) is a new endoscopic technique to treat post- POEM GERD. We conducted a multicenter cohort study to compare outcomes between POEM and POEM-F.

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Background:  Endoscopic ultrasound (EUS)-guided gallbladder drainage (GBD) and EUS-guided choledochoduodenostomy (CDS) with lumen-apposing metal stents are alternative approaches to endoscopic retrograde cholangiopancreatography. We compared EUS-GBD and EUS-CDS as first-line therapies in the management of distal malignant biliary obstruction (MBO).

Methods:  This was an international, multicenter, retrospective, observational study at 28 tertiary care centers from April 2017 to August 2024.

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Background And Objectives: Chronic liver inflammation leads to fibrosis and cirrhosis. To avoid portal hypertension-related complications, fibrosis' early detection is imperative. Biopsy remains the gold standard, but magnetic resonance elastography (MRE) and EUS-guided elastography are noninvasive procedures currently used for liver stiffness measurement (LSM).

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Background And Aims: Salvage endoscopic submucosal dissection (ESD) has been proposed for previously attempted colorectal lesions (PACLs), yet the extensive submucosal fibrosis impacts procedural difficulty and resection outcomes. The aim of this study was to evaluate the efficacy and safety of salvage ESD for the treatment of PACLs.

Methods: This international, multicenter study enrolled consecutive patients who underwent ESD to manage PACLs.

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This review explores the transformative potential of artificial intelligence (AI) in the diagnosis and management of biliopancreatic disorders. By leveraging cutting-edge techniques, such as deep learning and convolutional neural networks, AI has significantly advanced gastroenterology, particularly in endoscopic procedures, such as colonoscopy; upper endoscopy; and capsule endoscopy. These applications enhance adenoma detection rates and improve lesion characterization and diagnostic accuracy.

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Background/objectives: Pancreatic cancer remains one of the most aggressive and lethal malignancies, with limited effective treatment options for advanced stages. Microwave Ablation (MWA) has emerged as a minimally invasive therapeutic modality, offering potential benefits in tumor control. This review aims to critically assess the safety and efficacy of MWA in the treatment of pancreatic cancer, focusing on its application in various pancreatic lesions.

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Background And Study Aims: Gastroesophageal reflux (GER) and its long-term sequelae remain a concern following peroral endoscopic myotomy (POEM). POEM with fundoplication (POEM-F) is simultaneous fundoplication via pure natural orifice transluminal endoscopic surgery (NOTES). In this study, we evaluated the efficacy and safety of POEM-F in mitigating post-POEM GER.

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Background And Aims: Achieving histological remission is a desirable emerging treatment target in ulcerative colitis (UC), yet its assessment is challenging due to high inter- and intraobserver variability, reliance on experts, and lack of standardization. Artificial intelligence (AI) holds promise in addressing these issues. This systematic review, meta-analysis, and meta-regression evaluated the AI's performance in assessing histological remission and compared it with that of pathologists.

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Article Synopsis
  • Killian-Jamieson diverticulum (KJD) is a rare esophageal condition typically treated with surgery, but a new method called KJ-POEM (per-oral endoscopic myotomy) offers a minimally invasive alternative.
  • An international study reviewing 13 patients who underwent KJ-POEM found that both clinical and technical success rates were 100%, with significant symptom improvement post-procedure.
  • The procedure demonstrated excellent safety, with no adverse events reported, a short hospital stay of about 1 day, and no recurrence of symptoms during the follow-up period of nearly 9.5 months.
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Article Synopsis
  • The text refers to a correction made to a previously published article.
  • The specific article mentioned can be identified by its DOI, which is 10.1055/a-2411-1814.
  • Corrections like this are common in academic publishing to address errors or inaccuracies in research.
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Article Synopsis
  • Zenker's diverticulum peroral endoscopic myotomy (Z-POEM) with mucosal flap incision (MFI) shows high effectiveness for treating symptomatic Zenker's diverticulum, as reported in a study involving 36 patients across eight international centers.
  • Clinical success was achieved in 97% of patients, with significant improvement in symptoms measured by the Kothari-Haber symptom score (KHSS).
  • The procedure demonstrated a strong technical success rate, with only one minor adverse event, indicating it is a safe option for patients with this condition, although further prospective evaluations are necessary for larger diverticulums.
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Background: EUS-guided gastroenterostomy (EUS-GE) is a novel and effective procedure for the management of malignant gastric outlet obstruction (GOO) with more durable results when compared to enteral stenting (ES). However, data comparing EUS-GE to ES in patients already treated with EUS-guided choledocoduodenostomy (EUS-CDS) for distal malignant biliary obstruction (DMBO) are lacking. We aimed to compare outcomes of EUS-GE and ES for the palliation of GOO in this specific population of patients.

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Article Synopsis
  • - The study investigated outcomes of lumen-apposing metal stents (LAMS) placement in patients with surgically altered anatomy (SAA), which is not well-documented in existing literature, involving 270 patients across 25 tertiary care centers up to November 2023.
  • - Technical success of the procedures was very high at 98%, with clinical success at 97%, although there was a notable adverse event rate of 12%, with various degrees of severity recorded.
  • - The results suggest that while LAMS placement in SAA is effective, due to the risk of complications, these procedures should only be performed by experienced endoscopists in specialized centers.
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Artificial intelligence (AI) models have demonstrated high diagnostic performance identifying neoplasia during digital single-operator cholangioscopy (DSOC). To date, there are no studies directly comparing AI vs. DSOC-guided probe-base confocal laser endomicroscopy (DSOC-pCLE).

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Background And Aims: Patients with sigmoid-type achalasia can be challenging to treat with peroral endoscopic myotomy (POEM). A short myotomy improves technical success; however, outcomes have not previously been evaluated.

Methods: This was a multicenter, international, retrospective study of patients who underwent POEM with short (≤4 cm) or standard esophageal myotomy.

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Background: Viral infections are known to impact the pancreato-biliary system; however, there are limited data showing that the same is true of COVID-19. Endoscopic retrograde cholangiopancreatography (ERCP) can safely be performed in patients with COVID-19 infection, but outcomes of patients with COVID-19 infections and concomitant pancreatic and biliary disease requiring endoscopic intervention are unknown.

Aims: This study aims to evaluate the severity of pancreaticobiliary diseases and post-ERCP outcomes in COVID-19 patients.

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Article Synopsis
  • Digital single-operator cholangioscopy (DSOC) is a technique for diagnosing and treating biliary duct disorders, but traditional systems faced issues like cost and image quality.
  • A new system called eyeMAX was developed to improve these limitations; the study assessed its diagnostic accuracy and safety across 80 patients from two cohorts—diagnostic and therapeutic.
  • Results showed high sensitivity (91.6%) and specificity (87.5%) for diagnosing neoplasms, with successful stone removal for 71% of patients who required treatment, and no adverse events reported during the procedures.
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Background And Aims: EUS-guided radiofrequency ablation (EUS-RFA) has emerged as an alternative for the local treatment of unresectable pancreatic ductal adenocarcinoma (PDAC). We assessed the feasibility and safety of EUS-RFA in patients with unresectable PDAC.

Methods: This study followed an historic cohort compounded by locally advanced (LA-) and metastatic (m)PDAC-naïve patients who underwent EUS-RFA between October 2019 and March 2022.

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Background And Aims: Digital single-operator cholangioscopy (DSOC) plays a critical role in directly visualizing and treating the bile duct system. Although various cholangioscopes with different external diameters are available for DSOC, certain challenging scenarios persist in which existing scopes fail to complete a thorough evaluation of the bile ducts. To overcome these limitations, we aimed to introduce and highlight the application of a novel 7F cholangioscope.

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Article Synopsis
  • Lumen-apposing metal stents (LAMSs) are crucial for ultrasonography-guided gallbladder drainage (EUS-GBD) in patients who are not fit for surgery, especially those with acute cholecystitis.
  • A retrospective study of 54 patients showed a 100% technical success rate for LAMS placement, with 76.67% of patients achieving clinical success and only 5.6% experiencing adverse events.
  • Patients typically left the hospital after about 5 days, highlighting EUS-GBD as a safe and effective option for high-risk surgical patients.
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