Pancreatic Stents: Indications, Placement, and Management

Pancreatic duct stents relieve obstruction from strictures, stones, or post-surgical leaks. They serve as temporary bridges to definitive therapy or palliation.

Indications

• Benign strictures (chronic pancreatitis, post-traumatic, post-surgical)
• Ductal stones not extractable
• Pancreatic duct leak/disruption (post-ERCP, trauma, surgery)
• Palliation of malignant obstruction (if not surgical candidate)
• Post-Whipple anastomotic stricture prevention (controversial; routine use not standard)

Stent Types

Type	Material	Diameter	Duration	Use Case
Plastic	Polyethylene, Teflon	3–7 Fr	Weeks–3 months	Benign, temporary
Fully covered SEMS	Nitinol + silicone/polyurethane	8–10 mm	3–6 months	Benign strictures, leaks
Uncovered SEMS	Nitinol	8–10 mm	Permanent	Malignant obstruction

Placement (ERCP)

1. Endoscope to duodenum; cannulate pancreatic duct.
2. Guidewire across stricture/obstruction.
3. Stent advanced over wire; deployed under fluoroscopy.
4. Contrast injection confirms flow.

Management and Complications

• Occlusion: Sludge, biofilm, tissue ingrowth (uncovered). Plastic: 3–6 months typical patency.
• Migration: Proximal (into duct) or distal (into duodenum); covered SEMS higher risk.
• Pancreatitis: Post-ERCP (5–10%); rectal indomethacin prophylaxis standard.
• Infection: Cholangitis if biliary communication; covered stents reduce risk.
• Exchange/removal: Scheduled before occlusion; endoscopic retrieval.

Key Point

Stents are temporary. Definitive treatment (stricture dilation, stone clearance, surgery) should be planned. Multidisciplinary pancreatic clinic coordination optimizes outcomes.