title: Preliminary experience with self-expanding closed-cell stent placement in small arteries less than 2 mm in diameter for the treatment of intracranial aneurysms.
abstract: OBJECTIVE
  The purpose of this study was to report the authors' preliminary experience using self-expanding closed-cell stents deployed in small arteries (< 2 mm in diameter) to treat intracranial aneurysms.
  
  
  METHODS
  A total of 31 patients were studied. All subjects met the following criteria: 1) they received an Enterprise stent for treatment of a wide-necked aneurysm or a dissecting aneurysm or as part of a stent-salvage procedure; and 2) they had an Enterprise stent deployed in a small parent artery (< 2 mm in diameter) that had no atherosclerotic stenosis. Procedure-related complications and follow-up sizes of the parent arteries were evaluated for safety and patency.
  
  
  RESULTS
  There were 16 ruptured aneurysms and 15 unruptured aneurysms. Three (9.7%) of the 31 patients experienced procedure-related complications, and they all were asymptomatic. Follow-up angiography was performed in 27 patients (87.1%) (at a mean 15.5 months after surgery). Parent arteries with 2 acute angles (n = 4) were occluded in 3 cases (75.0%), and those with no acute angles (n = 13) or 1 acute angle (n = 6) showed 100% patency on follow-up angiography. There was a significant difference between the follow-up sizes (mean 1.72 ± 0.30 mm) of parent arteries and their sizes (mean 1.59 ± 0.26 mm) before treatment (95% CI - 0.254 to - 0.009 mm; p = 0.037, paired-samples t-test).
  
  
  CONCLUSIONS
  In the current series the deployment of self-expanding closed-cell stents in small arteries was safe and resulted in good patency, especially when the stents were deployed in segments of the parent artery with no acute angles or only 1 acute angle.
authors.affiliation: Departments of 1Neurosurgery and.
authors.forename: Joonho
authors.initials: J
authors.lastname: Chung
authors.affiliation: 2Radiology, Gangnam Severance Hospital, Yonsei University, Seoul;
authors.forename: Sang Hyun
authors.initials: SH
authors.lastname: Suh
authors.affiliation: Departments of 1Neurosurgery and.
authors.forename: Chang-Ki
authors.initials: CK
authors.lastname: Hong
authors.affiliation: Departments of 1Neurosurgery and.
authors.forename: Jin-Yang
authors.initials: JY
authors.lastname: Joo
authors.affiliation: 3Department of Neurosurgery, Ajou University School of Medicine, Suwon; and.
authors.forename: Yong Cheol
authors.initials: YC
authors.lastname: Lim
authors.affiliation: 4Department of Neurosurgery, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.
authors.forename: Yong Sam
authors.initials: YS
authors.lastname: Shin
authors.affiliation: Departments of 1Neurosurgery and.
authors.forename: Yong Bae
authors.initials: YB
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D017542:Aneurysm, Ruptured / Q000601:surgery*; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D015607:Stents; D016896:Treatment Outcome
keywords: DSA = digital subtraction angiography; EVT = endovascular treatment; Enterprise stent; GOS = Glasgow Outcome Scale; LVIS = Low-Profile Visualized Intraluminal Stent; closed-cell stent; intracranial aneurysm; self-expanding stent; small parent vessels; vascular disorders