title: Tubular foreign body or stent: safe retrieval or repositioning using the coaxial snare technique.
abstract: OBJECTIVE
  To evaluate the utility and advantages of the coaxial snare technique in the retrieval of tubular foreign bodies.
  
  
  METHODS
  Using the coaxial snare technique, we attempted to retrieve tubular foreign bodies present in seven patients. The bodies were either stents which were malpositioned or had migrated from their correct position in the vascular system (n=2), a fragmented venous introducer sheath (n=1), fragmented drainage catheters in the biliary tree (n=2), or fractured external drainage catheters in the urinary tract (n=2). After passing a guidewire and/or a dilator through the lumina of these foreign bodies, we introduced a loop snare over the guidewire or dilator, thus capturing and retrieving them.
  
  
  RESULTS
  In all cases, it was possible to retrieve or reposition the various items, using a minimum-sized introducer sheath or a tract. No folding was involved. In no case were surgical procedures required, and no complications were encountered.
  
  
  CONCLUSIONS
  The coaxial snare technique, an application of the loop snare technique, is a useful and safe method for the retrieval of tubular foreign bodies, and one which involves minimal injury to the patient.
authors.affiliation: Department of Radiology, Kyungpook National University School of Medicine, Daegu, Korea.
authors.forename: Chang Kyu
authors.initials: CK
authors.lastname: Seong
authors.forename: Yong Joo
authors.initials: YJ
authors.lastname: Kim
authors.forename: Jin Wook
authors.initials: JW
authors.lastname: Chung
authors.forename: Seung Hyup
authors.initials: SH
authors.lastname: Kim
authors.forename: Joon Koo
authors.initials: JK
authors.lastname: Han
authors.forename: Hyun Beom
authors.initials: HB
authors.lastname: Kim
authors.forename: Jae Hyung
authors.initials: JH
authors.lastname: Park
mesh_terms: D000328:Adult; D002408:Catheters, Indwelling; D004322:Drainage / Q000295:instrumentation; D005547:Foreign Bodies / Q000000981:diagnostic imaging* / Q000628:therapy*; D005548:Foreign-Body Migration; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D015607:Stents