Publications by authors named "Benjamin Heidrich"

Purpose: To assess the technical feasibility and outcome of cryoablation with simultaneous bile duct protection in patients with centrally located liver tumors (CLLT).

Material And Methods: Three patients (all male, 40-79 years) with CLLT located in close proximity to the right (n = 2) or left (n = 1) hepatic duct were included in this retrospective study. Prior to cryoablation, a nasobiliary tube was placed endoscopically in the respective bile duct.

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Objective: Metabolic dysfunction-associated steatotic liver disease (MASLD) is the most common cause of chronic liver disease, especially in patients with severe obesity. However, current mouse models for MASLD do not reflect the polygenetic background nor the metabolic changes in this population. Therefore, we investigated two novel mouse models of MASLD with a polygenetic background for the metabolic syndrome.

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Background: Refractory ascites (RA) remains a serious complication in patients with cirrhosis. Currently, the insertion of a TIPS is considered the standard of care in these patients. To achieve symptom control in those with TIPS contraindications, tunneled peritoneal catheters (PeCa) or ascites pumps were introduced.

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Article Synopsis
  • Biliary strictures are common after liver transplantation, and when endoscopic techniques fail, percutaneous transhepatic biliary drainage (PTBD) can be an effective alternative.
  • A study involving 56 liver transplant recipients showed that PTBD has a high success rate (98%) and can improve various lab indicators, although the risk of subsequent biliary complications depends on the type of stricture present.
  • Patients who achieved internal drainage into the small intestine had better 12-month survival rates compared to those needing external drainage, highlighting the importance of the initial PTBD approach.
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Background: Segmented self-expanding metal stents (SEMS) are an alternative to conventional unsegmented SEMS in the treatment of esophageal strictures. Due to their segmented design, they may adapt better to the surrounding structures making them less likely to migrate or cause trauma. We examined if there are clinically relevant differences between segmented and conventional esophageal SEMS in benign and malignant stenosis in terms of their functionality and safety.

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Article Synopsis
  • The study investigates the safety and significance of transjugular liver biopsy (TJLB) in diagnosing and managing acute liver failure (ALF) in patients at a transplant center over ten years.* -
  • Out of 43 patients studied, TJLB confirmed the suspected causes of ALF for most, but was particularly impactful in cases where treatable conditions like autoimmune hepatitis were suspected, altering treatment plans in these scenarios.* -
  • Although the degree of intrahepatic necrosis was shown to be significant in initial analyses, it did not significantly predict survival without a liver transplant when examined in more complex statistical models.*
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Perioperative hypothermia is associated with significant complications and can be prevented with forced-air heating systems (FAHS). Whether hypothermia occurs during prolonged endoscopic sedation is unclear and prevention measures are not addressed in endoscopic sedation guidelines. We hypothesized that hypothermia also occurs in a significant proportion of patients undergoing endoscopic interventions associated with longer sedation times such as endoscopic retrograde cholangiopancreaticography (ERCP), and that FAHS may prevent it.

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  • Bacterial cholangitis often occurs in liver transplant patients with biliary issues, requiring antibiotics and endoscopic procedures, but standard microbiological cultivation (SMC) has limitations in identifying all bacterial species.
  • A study involving 242 bile samples utilized next generation sequencing (NGS) to assess its effectiveness compared to SMC, revealing that NGS detected significantly more bacterial genera.
  • The findings suggest that NGS is a more sensitive diagnostic tool than SMC, indicating that using both methods together can enhance the identification of bacteria in bile and lead to better-targeted antibiotic therapies.
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Background And Aims: Hepatitis D virus (HDV) infection causes the most severe form of chronic viral hepatitis. However, it is still unclear to what extent the underlying cirrhosis may contribute to disease progression. The aim of this study was to compare the long-term outcome of HDV infection with HBV monoinfection in a single-center cohort of both non-cirrhotic and cirrhotic patients.

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Background & Aims: Until recently, pegylated interferon-alfa-2a (PEG-IFNa) therapy was the only treatment option for patients infected with hepatitis D virus (HDV). Treatment with PEG-IFNa with or without tenofovir disoproxil fumarate (TDF) for 96 weeks resulted in HDV RNA suppression in 44% of patients at the end of therapy but did not prevent short-term relapses within 24 weeks. The virological and clinical long-term effects after prolonged PEG-IFNa-based treatment of hepatitis D are unknown.

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Introduction: Bile has long been considered sterile. Recent studies show that bacteria can frequently be detected in bile and certain bacterial species are associated with bile duct-associated liver disease.

Objectives: To detect bacterial species and antibiotic resistance in bile in bile duct-associated liver disease.

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Importance: The potential association of low-volume paracentesis of less than 5 L with complications in patients with ascites remains unclear, and individuals with cirrhosis and refractory ascites (RA) treated with devices like Alfapump or tunneled-intraperitoneal catheters perform daily low-volume drainage without albumin substitution. Studies indicate marked differences regarding the daily drainage volume between patients; however, it is currently unknown if this alters the clinical course.

Objective: To determine whether the incidence of complications, such as hyponatremia or acute kidney injury (AKI), is associated with the daily drainage volume in patients with devices.

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Background & Aims: Infection with the hepatitis D virus (HDV) causes the most severe form of viral hepatitis with a high risk to develop clinical complications of liver disease. In addition, hepatitis delta has been shown to be associated with worse patient-reported outcomes. Until recently, only pegylated interferon alfa could be used to treat hepatitis delta.

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Background: Progress of cholangitis to cholangiosepsis is a frequent observation in patients with secondary sclerosing cholangitis in critically ill patients (SSC-CIP). Adequate biliary drainage may reduce episodes of cholangiosepsis and therefore stabilize liver function and improve survival. The primary objective of the BISCIT study is to demonstrate that scheduled biliary interventions will reduce incidence of cholangiosepsis, liver transplantation, or death in patients with SSC-CIP.

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Aims: Cholecystitis generally warrants immediate cholecystectomy; however, high-risk patients require non-surgical options for gallbladder decompression. The continuous evolution of endoscopic techniques makes it difficult for clinicians tochoose the best technique for high-risk patients. Here we aimed to show that percutaneous transhepatic gallbladder aspiration, a technique that has fallen into disuse, is a safe and rapid method for gallbladder decompression.

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Background: Onset of refractory ascites is the hallmark of end-stage liver disease. If liver transplantation (LTx) is not available and contraindications for a transjugular portosystemic shunt (TIPS) are present, repeated paracentesis remains the standard of care (SOC). Home-based, tunnelled peritoneal catheters (PeCa) have been suggested as an alternative treatment option.

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Background And Study Aim: Secondary Aortoenteric Fistulas (sAEF) are difficult to diagnose and usually result in fatal gastrointestinal (GI) bleeding following aortic repair. Outcomes are largely dependent on a timely diagnosis, but AEFs remain challenging to identify endoscopically and are usually diagnosed on computed tomography (CT) scans. The aim of our study was optimize diagnosis of AEF by identifying patients developing GI bleeding after aortic repair, investigate their clinical course and identify factors specific to different bleeding sources.

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Article Synopsis
  • * Researchers found that the microbes in ITBL patients were very different from those in patients with another issue called anastomotic strictures (AS), especially when treatments like stenting were used.
  • * They learned that giving antibiotics (medicine that fights germs) might not help much for ITBL, so using them carefully is important to avoid making the germs stronger against these meds.
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Standard treatment of hepatitis delta virus (HDV) infection remains pegylated-interferon alfa (peg-IFNα) in most centers, which is not only associated with rather low efficacy but several adverse events. Hepatitis B core-related antigen (HBcrAg) is linked to intrahepatic covalently closed circular DNA levels and has previously been suggested as response predictor in IFN-based treatment of hepatitis B virus (HBV) mono-infection. This study aimed to investigate the value of HBcrAg in the management of patients with HBV/HDV co-infection undergoing peg-IFNα treatment.

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Objectives: Endoscopic vacuum-assisted closure (E-VAC) of leaks of the upper gastrointestinal tract is an increasingly applied endoscopic technique. Data on indication, clinical success, complications and prognostic factors are still sparse.

Methods: Patients treated with E-VAC between 2012 and 2019 at a tertiary referral center have been retrospectively analyzed.

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Dysregulation of glucose homeostasis plays a major role in the pathogenesis of non-alcoholic steatohepatitis (NASH) as it activates proinflammatory and profibrotic processes. Beneficial effects of antiglycemic treatments such as GLP-1 agonist or SGLT-2 inhibitor on NASH in patients with diabetes have already been investigated. However, their effect on NASH in a non-diabetic setting remains unclear.

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Background And Aims: It is well accepted that liver diseases and their outcomes are associated with intestinal microbiota, but causality is difficult to establish. The intestinal microbiota are altered in patients with hepatitis C. As chronic HCV infection can now be cured in almost all patients, it is an ideal model to study the influence of liver disease on the microbiota.

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Hepatitis delta virus (HDV) infection causes the most severe form of viral hepatitis. PEG-interferon alpha-2a (PEG-IFNα-2a) is the only effective treatment but its long-term clinical impact is unclear. The aim of this study was to investigate the long-term outcome after 48 weeks of pegylated interferon alpha-2a therapy.

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Proton pump inhibitors (PPI), a class of drugs commonly used, are known to be associated with changes in the intestinal microbiota. Published studies were done in heterogeneous cohorts which could hamper conclusions drawn as effects of diseases were not taken into consideration. We aimed to elucidate differences in the intestinal microbiota being associated to the use of PPI in a cohort study of patients with chronic hepatitis C.

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Background: Hepatitis D is the most severe form of chronic viral hepatitis. Treatment guidelines recommend 1 year of peginterferon alfa, which is effective in 25-30% of patients only. Whether prolonged therapy with peginterferon alfa-2a for 96 weeks and combination therapy with tenofovir disoproxil fumarate (TDF) would increase hepatitis D virus (HDV) RNA suppression is unknown.

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