Publications by authors named "Misha D Luyer"

Background: Supporting patients before, and long after, their bariatric treatment contributes a lot to successful outcome. eHealth interventions have a hypothetical benefit in addition to standard care. This could lead to increased weight loss, reduction of obesity-related diseases, patient adherence, and quality of life.

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Objective: To assess the feasibility, proficiency, and mastery learning curves for robotic pancreatoduodenectomy (RPD) in "second-generation" RPD centers following a multicenter training program adhering to the IDEAL framework.

Background: The long learning curves for RPD reported from "pioneering" expert centers may discourage centers interested in starting an RPD program. However, the feasibility, proficiency, and mastery learning curves may be shorter in "second-generation" centers that participated in dedicated RPD training programs, although data are lacking.

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Objective: To assess the nationwide long-term uptake and outcomes of minimally invasive distal pancreatectomy (MIDP) after a nationwide training program and randomized trial.

Background: Two randomized trials demonstrated the superiority of MIDP over open distal pancreatectomy (ODP) in terms of functional recovery and hospital stay. Data on implementation of MIDP on a nationwide level are lacking.

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Objective: To assess the learning curve of pancreaticojejunostomy during robotic pancreatoduodenectomy (RPD) and to predict the risk of postoperative pancreatic fistula (POPF) by using the objective structured assessment of technical skills (OSATS), taking the fistula risk into account.

Background: RPD is a challenging procedure that requires extensive training and confirmation of adequate surgical performance. Video grading, modified for RPD, of the pancreatic anastomosis could assess the learning curve of RPD and predict the risk of POPF.

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Esophageal resection is a high-risk and technically demanding procedure, with a long proficiency-gain curve. The European Society Diseases of the Esophagus (ESDE)-Minimally Invasive Esophagectomy (MIE) training program was launched in 2018 for European surgeons willing to train and to begin a career undertaking MIE. The aim of this study was to evaluate the first experience of the ESDE-MIE fellowship and relate this to the initially predetermined core principles and objectives of the program.

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Background: Post-operative pancreas fistula (POPF) is a common complication after pancreatoduodenectomy (PD). A Teres Ligamentum (TL)-wrap covering the pancreaticojejunostomy (PJ) is suggested as a potential solution to reduce POPF. The aim of this study was to compare POPF incidence (grade B/C) in patients with or without a TL-wrap.

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Article Synopsis
  • Vagus nerve stimulation (SpNS) was tested in mice to see if it could reduce inflammation in inflammatory bowel disease (IBD) by targeting the splenic nerve and releasing norepinephrine (NE).
  • Mice received stimulation during an induced colitis experiment, showing improved symptoms and lower inflammation markers compared to those with no stimulation.
  • The results suggest SpNS may lower immune response activation, indicating potential for clinical application in IBD treatment for humans.
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Background: Early recognition and management of postoperative complications, before they become clinically relevant, can improve postoperative outcomes for patients, especially for high-risk procedures such as pancreatic resection.

Methods: We did an open-label, nationwide, stepped-wedge cluster-randomised trial that included all patients having pancreatic resection during a 22-month period in the Netherlands. In this trial design, all 17 centres that did pancreatic surgery were randomly allocated for the timing of the crossover from usual care (the control group) to treatment given in accordance with a multimodal, multidisciplinary algorithm for the early recognition and minimally invasive management of postoperative complications (the intervention group).

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Background: Somatostatin analogues (SA) are currently used to prevent postoperative pancreatic fistula (POPF) development. However, its use is controversial. This study investigated the effect of different SA protocols on the incidence of POPF after pancreatoduodenectomy in a nationwide population.

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Background: Robotic surgery may improve surgical performance during minimally invasive pancreatoduodenectomy as compared to 3D- and 2D-laparoscopy but comparative studies are lacking. This study assessed the impact of robotic surgery versus 3D- and 2D-laparoscopy on surgical performance and operative time using a standardized biotissue model for pancreatico- and hepatico-jejunostomy using pooled data from two randomized controlled crossover trials (RCTs).

Methods: Pooled analysis of data from two RCTs with 60 participants (36 surgeons, 24 residents) from 11 countries (December 2017-July 2019) was conducted.

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The cholinergic anti-inflammatory pathway (CAIP) has been proposed as an efferent neural pathway dampening the systemic inflammatory response via the spleen. The CAIP activates the splenic neural plexus and a subsequent series of intrasplenic events, which at least require a close association between sympathetic nerves and T cells. Knowledge on this pathway has mostly been derived from rodent studies and only scarce information is available on the innervation of the human spleen.

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Background: Minimally invasive distal pancreatectomy (MIDP) shortens time to functional recovery and improves 30-day quality of life (QoL), as compared with open distal pancreatectomy (ODP) for nonmalignant disease. The impact of MIDP on QoL, cosmetic satisfaction, and overall major complications beyond 1-year follow-up is currently unknown.

Study Design: The Minimally Invasive Versus Open Distal Pancreatectomy (LEOPARD) trial randomized 108 patients to MIDP (laparoscopic or robotic) or ODP in 14 Dutch centers (April 2015 to March 2017).

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Background: We evaluated the stroma marker A Disintegrin And Metalloprotease 12 (ADAM12) as a preoperative prognostic and treatment-predictive marker for overall survival (OS) in pancreatic ductal adenocarcinoma (PDAC) and periampullary cancers.

Methods: Materials were derived from the prospective nationwide Dutch Pancreas Biobank (2015-2017). We included patients who underwent resection because of PDAC/periampullary cancer or non-invasive IPMN (control group) and had a preoperative serum sample available.

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Objective: To assess feasibility and safety of a multicenter training program in robotic pancreatoduodenectomy (RPD) adhering to the IDEAL framework for implementation of surgical innovation.

Background: Good results for RPD have been reported from single center studies. However, data on feasibility and safety of implementation through a multicenter training program in RPD are lacking.

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Background: Minimally invasive distal pancreatectomy (MIDP) has been suggested to reduce postoperative outcomes as compared to open distal pancreatectomy (ODP). Recently, the first randomized controlled trials (RCTs) comparing MIDP to ODP were published. This individual patient data meta-analysis compared outcomes after MIDP versus ODP combining data from both RCTs.

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Article Synopsis
  • Recent studies show that SARS-CoV-2 can infect intestinal cells expressing the ACE2 receptor, highlighting the importance of these cells in the virus's entry point.
  • The research examined the relationship between nicotinic receptors, inflammation regulation, and ACE2 expression, particularly focusing on the effects of vagus nerve stimulation (VNS) on intestinal epithelial cells.
  • Results indicated that while ACE2 and nicotinic receptors are co-expressed in certain intestinal cells, VNS did not influence ACE2 expression, suggesting VNS may not help reduce the risk of SARS-CoV-2 infection in the intestines.
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Laparoscopic pancreatoduodenectomy (LPD) is increasingly performed worldwide as an alternative to the open conventional method, with the aim of advancing recovery. Because of its recent introduction, little is known about late surgical complications from this procedure. Here, we describe a case of a 76-year-old woman who underwent LPD with end-to-side gastrojejunostomy and presented with pain in the right upper quadrant of the abdomen 6 months thereafter.

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Article Synopsis
  • * Research using mice showed that when ChAT T cells were absent in CD4 T cells, the mice experienced less severe acute colitis but struggled more during the recovery phase compared to control mice.
  • * Overall, ChAT T cells can increase inflammation during the early stages of bowel inflammation but are beneficial for the healing process afterward, suggesting a complex role in managing colitis.
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Inflammatory bowel diseases (IBD) have a complex, multifactorial pathophysiology with an unmet need for effective treatment. This calls for novel strategies to improve disease outcome and quality of life for patients. Increasing evidence suggests that autonomic nerves and neurotransmitters, as well as neuropeptides, modulate the intestinal immune system, and thereby regulate the intestinal inflammatory processes.

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Background: It is currently unclear what the added value is of 3D-laparoscopy during pancreatic and biliary surgery. 3D-laparoscopy could improve procedure time and/or surgical performance, for instance in demanding anastomoses such as pancreatico- and hepaticojejunostomy. The impact of 3D-laparoscopy could be negligible in more experienced surgeons.

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Background: The systemic inflammatory response seen after surgery seems to be related to postoperative complications. A reduction of the inflammatory response through minimally invasive surgery might therefore be the mechanism via which postoperative outcome could be improved. The aim of this study was to investigate if postoperative inflammatory markers differed between laparoscopic (LPD) and open pancreatoduodenectomy (OPD) and if there was a relationship between inflammatory markers and the occurrence of postoperative complications.

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Background: Laparoscopic pancreatoduodenectomy may improve postoperative recovery compared with open pancreatoduodenectomy. However, there are concerns that the extensive learning curve of this complex procedure could increase the risk of complications. We aimed to assess whether laparoscopic pancreatoduodenectomy could reduce time to functional recovery compared with open pancreatoduodenectomy.

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Background: Laparoscopic pancreatoduodenectomy with open reconstruction (LPD-OR) has been suggested to lower the rate of postoperative pancreatic fistula reported after laparoscopic pancreatoduodenectomy with laparoscopic reconstruction (LPD). Propensity score matched studies are, lacking.

Methods: This is a multicenter prospective cohort study including patients from 7 Dutch centers between 2014-2018.

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Surgical innovation and pioneering are important for improving patient outcome, but can be associated with learning curves. Although learning curves in surgery are a recognized problem, the impact of surgical learning curves is increasing, due to increasing complexity of innovative surgical procedures, the rapid rate at which new interventions are implemented and a decrease in relative effectiveness of new interventions compared to old interventions. For minimally invasive esophagectomy (MIE), there is now robust evidence that implementation can lead to significant learning associated morbidity (morbidity during a learning curve, that could have been avoided if patients were operated by surgeons that have completed the learning curve).

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