Biliary Stent Complications and Management Techniques

Biliary stents are integral to the management of both benign and malignant biliary obstruction, yet their use is tempered by a spectrum of potential complications. Stent occlusion, driven by sludge formation, bacterial biofilm and tumour ingrowth, remains the most frequent issue leading to recurrent cholestasis. Migration of plastic and metal stents can result in luminal injury or perforation of the gastrointestinal tract. Infective complications, including cholangitis and cholecystitis, arise when biliary drainage is compromised. Stent embedment or tissue overgrowth poses a challenge for safe removal, and pancreatitis can occur after insertion. Management strategies range from endoscopic techniques—such as stent exchange, balloon sweeping and retrieval devices—to percutaneous access for drainage or retrieval in complex cases. Surgical intervention is reserved for perforation or irretrievable stent fragments. Recent advances in stent design and adjunctive technologies aim to extend patency, reduce migration and simplify removal, thereby improving patient outcomes.

Research from Nature Portfolio

Recent studies have demonstrated the promise of locally delivered pharmacotherapy via drug-eluting biliary stents. Novel coatings releasing anti-inflammatory and anticholestatic agents have shown prolonged lumen patency and lower infection rates in early clinical cohorts. A second line of investigation has introduced fully biodegradable polymer stents that degrade over a controlled timeframe, obviating the need for endoscopic removal and reducing the incidence of stent displacement. In parallel, machine-learning algorithms trained on patient characteristics and cholangiographic imaging have achieved high accuracy in predicting stent occlusion, enabling personalised scheduling of stent exchange and preemptive intervention.

Biliary Stent Complications and Management Techniques publication trend

The graph below shows the total number of articles in biliary stent complications and management techniques across all publications each year (not limited to Nature Index journals).

Technical terms

Biliary stent: A tubular device placed in the bile duct to maintain patency and facilitate drainage.

Occlusion: Blockage of the stent lumen by sludge, biofilm or tumour tissue.

Migration: Displacement of a stent from its intended position, potentially causing perforation or obstruction.

Cholangitis: Infection of the biliary tree, often precipitated by stent blockage.

Biodegradable stent: A stent composed of resorbable polymers that dissolve over time, eliminating the need for removal.

Drug-eluting stent: A stent coated with therapeutic agents that are released locally to reduce inflammation or inhibit tumour ingrowth.

Endoscopic ultrasound (EUS): An imaging technique combining endoscopy and ultrasonography, used to guide stent placement in challenging anatomy.

References

1. Percutaneous retrieval of a biliary stent after migration and ileal perforation. World Journal of Emergency Surgery (2009).
2. Colonic diverticular perforation by a migrated biliary stent. Medicine (2021).