Aim. To analyze the risk factors for pancreatic
stent migration, dislocation, and fracture in
chronic pancreatitis patients with pancreatic
strictures. Materials and Methods. Endoscopic
stent placements (total 386 times) were performed in 99
chronic pancreatitis patients with pancreatic duct
stenosis at our institution between April 2006 and June 2014. We retrospectively examined the frequency of
stent migration, dislocation, and fracture and analyzed the patient factors and
stent factors. We also investigated the retrieval methods for migrated and fractured
stents and their success rates. Results. The frequencies of
stent migration, dislocation, and fracture were 1.5% (5/396), 0.8% (3/396), and 1.2% (4/396), respectively. No significant differences in the rates of migration, dislocation, or fracture were noted on the patient factors (etiology, cases undergoing endoscopic pancreatic
sphincterotomy, location of pancreatic duct
stenosis, existence of pancreatic stone, and approach from the main or minor papilla) and
stent factors (duration of
stent placement, numbers of
stent placements,
stent shape, diameter, and length).
Stent retrieval was successful in all cases of migration. In cases of fractured
stents, retrieval was successful in 2 of 4 cases. Conclusion.
Stent migration, fracture, and dislocation are relatively rare, but possible complications. A good understanding of retrieval techniques is necessary.