© Georg Thieme Verlag KG Stuttgart · New York
Endoscopic retrieval of a disrupted pancreatic stent using a nasopancreatic drainage tube
26. November 2010 (online)
A proximally migrated pancreatic stent is usually removed using a basket, balloon, snare or forceps   . The lasso technique  and its variation  have been described. However, no method for retrieval of a migrated pancreatic stent has been established. We retrieved a disrupted pancreatic stent using a nasopancreatic drainage tube (NPDT).
A 45-year-old man underwent pancreatic stent placement for chronic pancreatitis. The stent became disrupted 4 months after placement ([Fig. 1]).
Fig. 1 The pancreatic stent was disrupted, with the proximal part remaining in the body of the main pancreatic duct (arrow).
The distal part of the stent was removed; however, the proximal part could not be retrieved and remained in the body of the main pancreatic duct (MPD), despite attempts at removal using biopsy forceps, basket, balloon and a Soehendra stent retriever. These attempts led to the migration of the pancreatic stent upstream. So, a guide wire was inserted through the lumen of the stent ([Fig. 2]), and then a 5-Fr NPDT was inserted over the wire until it extended beyond the stent.
Fig. 2 A guide wire was inserted through the lumen of the pancreatic stent (arrowhead), which had moved upstream.
As the NPDT was gently pulled out, the stent moved with it toward the duodenum ([Fig. 3]).
Fig. 3 When the nasopancreatic drainage tube (NPDT) was gently pulled out, the pancreatic stent (arrowhead) moved with the NPDT toward the duodenum (arrow: top of NPDT).
The first flap of the NPDT was stuck into a side hole of the pancreatic stent, and the second flap was resting just before the distal end of the stent ([Fig. 4]).
Fig. 4 One flap of the nasopancreatic drainage tube stuck into a side hole of the stent while a second flap rested just before the distal end of the disrupted pancreatic stent (arrow, first flap; arrowhead, second flap).
After removal, the flaps were seen to be nearly at right angles ([Fig. 5]).
Fig. 5 Two flaps of the nasopancreatic drainage tube were open almost at right angles (arrow, first flap; arrowhead, second flap).
Removal of a migrated pancreatic stent using a basket or forceps is sometimes difficult. If the angle of the device in relation to the stent is not appropriate, the device will slip, cannot grasp the stent or will push it upstream. Inserting a 5-Fr NPDT is easy because it is slender and can be inserted over a guide wire. Grasping the stent is unnecessary. When a NPDT flap sticks into a side hole of the stent, removal will be possible in cases without stricture or a stone downstream of the main pancreatic duct.
Using a NPDT is one effective option for retrieval of a proximally migrated or disrupted pancreatic stent in the main pancreatic duct.
Competing interests: None
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T. Nambu, MD
Division of Gastroenterology
Department of Internal Medicine
Toho University Ohashi Medical Center