title: Jailing Technique Using a Catheter-based Open-cell Stent System in Internal Carotid Artery Sidewall Aneurysms Unfeasible to Simple Coiling.
abstract: OBJECTIVE
  An open cell stent system may offer better apposition of cell struts to vessel wall than a closed cell stent system in acute vasculature. The purpose of this study was to evaluate the feasibility of coiling using the jailing technique with the Neuroform EZ stent system.
  
  
  METHODS
  The jailing technique using the open-cell stent system of the Neuroform EZ stent was planned in 22 consecutive patients with 22 cerebral aneurysms. We retrospectively evaluated the technical success of the jailing technique and the occurrence of interference between two microcatheters as well as the factors influencing this interference.
  
  
  RESULTS
  The jailing technique was successful in 19/22 patients (86.4%), and interference between two microcatheters occurred in 6/21 (28.6%). The jailing technique failed in 3/22 patients, with problems that included failure of the stent delivery system to advance into the positioned microcatheter in one, interference between the microcatheters during the advancement of the stent delivery system in one, and failure of microcatheter insertion into the aneurysm sac in the remaining patient. Interference between the two microcatheters developed during the advance of the stent delivery system into the positioned microcatheter in all cases. One factor that influences interference between two microcatheters more than expected by chance is the carotid siphon angle (p = 0.019).
  
  
  CONCLUSIONS
  The acuteness of the carotid siphon angle influences the interference between two microcatheters. Therefore, the jailing technique using the Neuroform EZ stent should be performed carefully in cerebral aneurysms with an acute carotid siphon angle because the procedure may possibly fail.
authors.affiliation: Department of Neurosurgery, Busan Paik Hospital, Inje University, Busan, Korea.
authors.forename: Sun Geon
authors.initials: SG
authors.lastname: Yoon
authors.affiliation: Department of Neurosurgery, Haeundae Paik Hospital, Inje University, Busan, Korea.
authors.forename: Sung-Chul
authors.initials: SC
authors.lastname: Jin
authors.affiliation: Department of Neurosurgery, Haeundae Paik Hospital, Inje University, Busan, Korea.
authors.forename: Seung Hwan
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Neurosurgery, Haeundae Paik Hospital, Inje University, Busan, Korea.
authors.forename: Kyoung Dong
authors.initials: KD
authors.lastname: Jeon
authors.affiliation: Department of Neurosurgery, Haeundae Paik Hospital, Inje University, Busan, Korea.
authors.forename: Doo Young
authors.initials: DY
authors.lastname: Kim
authors.affiliation: Department of Neurosurgery, Haeundae Paik Hospital, Inje University, Busan, Korea.
authors.forename: Sun-Il
authors.initials: SI
authors.lastname: Lee
authors.affiliation: Department of Diagnostic Radiology, Busan Paik Hospital, Inje University, Busan, Korea.
authors.forename: Hae Woong
authors.initials: HW
authors.lastname: Jeong
keywords: Carotid siphon; Jailing; Microcatheter; Neuroform
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