Advances in pancreaticobiliary disease interventions: More options and better outcomes
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07/13/2023
Highlights of advances in pancreaticobiliary disease interventions were reviewed at this year’s Digestive Disease Week (DDW) as part of American Gastroenterological Association (AGA) postgraduate course.
Over the last several decades, the endoscopic treatment of pancreaticobiliary disease has advanced exponentially. Evidence-based advances are changing the landscape of pancreaticobiliary disease management.
While endoscopic retrograde cholangiopancreatography (ERCP) with transpapillary stent placement is first-line for the treatment of biliary obstruction, endoscopic ultrasound (EUS)-guided biliary drainage has emerged as an effective alternative in cases of failed ERCP. These procedures can be performed via a transhepatic approach (hepaticogastrostomy) from the proximal stomach, an extrahepatic approach (choledochoduodenostomy) from the duodenum, or via the gallbladder. Numerous studies have proved the safety and efficacy of these interventions in malignant biliary obstruction. A recent systematic meta-analysis pooled all of these approaches and concluded that EUS-guided biliary drainage is also reasonable to offer in benign disease when ERCP has failed or is not technically possible.
EUS-guided gallbladder drainage is similarly emerging as an alternative approach for management of acute cholecystitis. This is a reasonable option in patients with acute cholecystitis who are poor surgical candidates, have no evidence of gallbladder perforation, and will tolerate sedation. Moreover, this approach may be preferred over ERCP with cystic duct stent placement in the setting of a large stone burden, gastric outlet obstruction, or when an indwelling metal biliary stent occludes the cystic duct. Multidisciplinary discussion with surgical and interventional radiology services is essential, especially given this technique may preclude future cholecystectomy.
Indeterminate biliary strictures historically pose a major diagnostic challenge, and current approaches in the evaluation of such strictures lack diagnostic sensitivity. ERCP with concurrent brushing of the bile duct for cytology remains the most commonly used method of acquiring tissue. However, the sensitivity of diagnosis on brush cytology remains frustratingly low. Recent compelling evidence for increasing the number of brush passes to 30 in an indeterminate stricture improves diagnostic sensitivity and is a simple, safe, and low-cost intervention. This approach may ultimately decrease the number of patients requiring surgical intervention, which is particularly important when up to one-fifth of suspected biliary malignancies are found to be benign after surgical resection.
Not only have studies addressed increasing the diagnostic yield of stricture evaluation, but the treatment of biliary strictures has also evolved. Various stents are available, and different practice patterns have emerged for management of this entity. In an updated meta-analysis of randomized controlled trials evaluating multiple plastic stents versus a single covered metal stent for benign biliary strictures, no difference was found in stricture resolution, stricture recurrence, stent migration or adverse events. However, those patients treated with covered metal stents required fewer sessions of ERCP for stricture resolution. Moreover, no difference in stricture resolution was seen in subgroup analysis between anastomotic strictures, chronic pancreatitis, or bile duct injury. Despite higher cost of the stent itself, covered metal stents may ultimately lead to an overall decrease in health care expenditure.
The above examples are only a small subset of the progress that has been made in endoscopic management of pancreaticobiliary disease. The armamentarium of tools and techniques will continue to evolve to help us provide better minimally invasive care for our patients.
Dr. Schulman is associate professor in the division of gastroenterology and hepatology and the department of surgery at the University of Michigan. She is the incoming chief of endoscopy and the director of bariatric endoscopy. She disclosed consultancy work with Apollo Endosurgery, Boston Scientific, Olympus and MicroTech. She also disclosed research and grant support from GI Dynamics and Fractyl.
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7 Key Takeaways
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Developed a paper-based colorimetric sensor array for chemical threat detection.
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Can detect 12 chemical agents, including industrial toxins.
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Production cost is under 20 cents per chip.
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Utilizes dye-loaded silica particles on self-adhesive paper.
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Provides rapid, simultaneous identification through image analysis.
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Inspired by the mammalian olfactory system for pattern recognition.
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Future developments include a machine learning-enabled reader device.
The guidelines emphasize four-hour gastric emptying studies over two-hour testing. How do you see this affecting diagnostic workflows in practice?
Dr. Staller: Moving to a four-hour solid-meal scintigraphy will actually simplify decision-making. The two-hour reads miss a meaningful proportion of delayed emptying; standardizing on four hours reduces false negatives and the “maybe gastroparesis” purgatory that leads to repeat testing. Practically, it means closer coordination with nuclear medicine (longer slots, consistent standardized meal), updating order sets to default to a four-hour protocol, and educating front-line teams so patients arrive appropriately prepped. The payoff is fewer equivocal studies and more confident treatment plans.
Metoclopramide and erythromycin are the only agents conditionally recommended for initial therapy. How does this align with what is being currently prescribed?
Dr. Staller: This largely mirrors real-world practice. Metoclopramide remains the only FDA-approved prokinetic for gastroparesis, and short “pulsed” erythromycin courses are familiar to many of us—recognizing tachyphylaxis limits durability. Our recommendation is “conditional” because the underlying evidence is modest and patient responses are heterogeneous, but it formalizes what many clinicians already do: start with metoclopramide (lowest effective dose, limited duration, counsel on neurologic adverse effects) and reserve erythromycin for targeted use (exacerbations, bridging).
Several agents, including domperidone and prucalopride, received recommendations against first-line use. How will that influence discussions with patients who ask about these therapies?
Dr. Staller: Two points I share with patients: evidence and access/safety. For domperidone, the data quality is mixed, and US access is through an FDA IND mechanism; you’re committing patients to EKG monitoring and a non-trivial administrative lift. For prucalopride, the gastroparesis-specific evidence isn’t strong enough yet to justify first-line use. So, our stance is not “never,” it’s just “not first.” If someone fails or cannot tolerate initial therapy, we can revisit these options through shared decision-making, setting expectations about benefit, monitoring, and off-label use. The guideline language helps clinicians have a transparent, evidence-based conversation at the first visit.
The guidelines suggest reserving procedures like G-POEM and gastric electrical stimulation for refractory cases. In your practice, how do you decide when a patient is “refractory” to medical therapy?
Dr. Staller: I define “refractory” with three anchors.
1. Adequate trials of foundational care: dietary optimization and glycemic control; an antiemetic; and at least one prokinetic at appropriate dose/duration (with intolerance documented if stopped early).
2. Persistent, function-limiting symptoms: ongoing nausea/vomiting, weight loss, dehydration, ER visits/hospitalizations, or malnutrition despite the above—ideally tracked with a validated instrument (e.g., GCSI) plus nutritional metrics.
3. Objective correlation: delayed emptying on a standardized 4-hour solid-meal study that aligns with the clinical picture (and medications that slow emptying addressed).
At that point, referral to a center with procedural expertise for G-POEM or consideration of gastric electrical stimulation becomes appropriate, with multidisciplinary evaluation (GI, nutrition, psychology, and, when needed, surgery).
What role do you see dietary modification and glycemic control playing alongside pharmacologic therapy in light of these recommendations?
Dr. Staller: They’re the bedrock. A small-particle, lower-fat, calorie-dense diet—often leaning on nutrient-rich liquids—can meaningfully reduce symptom burden. Partnering with dietitians early pays dividends. For diabetes, tighter glycemic control can improve gastric emptying and symptoms; I explicitly review medications that can slow emptying (e.g., opioids; consider timing/necessity of GLP-1 receptor agonists) and encourage continuous glucose monitor-informed adjustments. Pharmacotherapy sits on top of those pillars; without them, medications will likely underperform.
The guideline notes “considerable unmet need” in gastroparesis treatment. Where do you think future therapies or research are most urgently needed?
Dr. Staller: I see three major areas.
1. Truly durable prokinetics: agents that improve emptying and symptoms over months, with better safety than legacy options (e.g., next-gen motilin/ghrelin agonists, better-studied 5-HT4 strategies).
2. Endotyping and biomarkers: we need to stop treating all gastroparesis as one disease. Clinical, physiologic, and microbiome/omic signatures that predict who benefits from which therapy (drug vs G-POEM vs GES) would transform care.
3. Patient-centered trials: larger, longer RCTs that prioritize validated symptom and quality-of-life outcomes, include nutritional endpoints, and reflect real-world medication confounders.
Our guideline intentionally highlights these gaps to hopefully catalyze better trials and smarter referral pathways.
Dr. Staller is with the Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston.