title: Neurointerventional procedures for unruptured intracranial aneurysms under procedural sedation and local anesthesia: a large-volume, single-center experience.
abstract: OBJECTIVE
  In this paper, the authors' goal was to report the outcome of patients with unruptured intracranial aneurysms undergoing endovascular treatment under conscious sedation (local anesthesia).
  
  
  METHODS
  Between November 5, 2001, and February 5, 2009, the authors treated 340 patients with 358 unruptured aneurysms by using neurointerventional procedures at Millard Fillmore Gates Hospital (Buffalo, New York). The data were retrospectively reviewed for periprocedural safety and long-term follow-up.
  
  
  RESULTS
  A total of 496 procedures were performed under local anesthesia. Of those, 370 procedures (74.6%) were completed successfully. In 82 procedures (16.5%), an associated medical or technical event occurred. Forty-four procedures (8.9%) were aborted. Rates of overall procedure-related morbidity and mortality were 1.2% (6 of 496) and 0.6% (3 of 496), respectively. The average hospital stay was 1.5 ± 2.5 days. Long-term follow-up was available in 261 (82.1%) of 318 patients whose procedures were performed with local anesthesia. Of those, 246 patients (94.3%) had a good outcome (modified Rankin Scale score ≤ 2), 6 patients (2.3%) had an unfavorable outcome, not related to the procedure, and 9 patients (3.4%) had a poor outcome (modified Rankin Scale score > 2) as a result of the intervention.
  
  
  CONCLUSIONS
  Interventional treatment under conscious sedation (local anesthesia) can be effectively performed in most patients with unruptured intracranial aneurysms and is associated with a short hospital stay and low morbidity and mortality.
authors.affiliation: Neurosurgical Service, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. cogilvy@partners.org
authors.forename: Christopher S
authors.initials: CS
authors.lastname: Ogilvy
authors.forename: Xinyu
authors.initials: X
authors.lastname: Yang
authors.forename: Osama A
authors.initials: OA
authors.lastname: Jamil
authors.forename: Erik F
authors.initials: EF
authors.lastname: Hauck
authors.forename: L Nelson
authors.initials: LN
authors.lastname: Hopkins
authors.forename: Adnan H
authors.initials: AH
authors.lastname: Siddiqui
authors.forename: Elad I
authors.initials: EI
authors.lastname: Levy
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000768:Anesthesia, General; D000772:Anesthesia, Local / Q000009:adverse effects; D016292:Procedural Sedation / Q000009:adverse effects; D057510:Endovascular Procedures / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D002532:Intracranial Aneurysm / Q000401:mortality / Q000628:therapy*; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D015996:Survival Rate; D016896:Treatment Outcome