title: Early outcomes of open abdominal repair versus endovascular repair for abdominal aortic aneurysm: report from national hospital organization network study in Japan.
abstract: OBJECTIVE
  Early outcomes of open abdominal repair (OS) versus endovascular repair (EVAR) for abdominal aortic aneurysm were retrospectively analyzed, after commercialized devices for EVAR had become available in Japan.
  
  
  METHODS
  A total of 781 consecutive patients (OS, n = 522; EVAR, n = 259) were treated at ten medical centers between January 2008 and September 2010. The OS group comprised patients with preoperative shock (SOS, n = 34) and without shock (NOS, n = 488).
  
  
  RESULTS
  Patients in the EVAR group were 3 years older than those in the NOS group. There was greater prevalence of hostile abdomen, on dialysis, chronic obstructive pulmonary disease on inhaled drug, and cerebrovascular disease in the EVAR group than in the NOS group. Surgical mortality was 16 cases (2.0% in all patients, EVAR: 0.8%, NOS: 1.4%, SOS: 21%). Hospital stay >30 days was documented in 52 (11%) with NOS, 11 (33%) with SOS, and 8 (3%) with EVAR. Thirty late deaths included 6 aneurysm related death and 14 cardiovascular causes at a mean follow up of 1.0 year. The survival rates freedom from all cause death at one year, were 95 ± 1% in NOS and 94 ± 2% in EVAR respectively.
  
  
  CONCLUSIONS
  Though significant differences in patient characteristics among three groups were noted, early results were satisfactory.
authors.affiliation: Author Affiliations and National Hospital Organization Network Study Group for Abdominal Aortic Aneurysm in Japan are listed at the end of the article.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Handa
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Onohara
authors.forename: Minoru
authors.initials: M
authors.lastname: Okamoto
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Shimoe
authors.forename: Masahiro
authors.initials: M
authors.lastname: Okada
authors.forename: Yoshimitsu
authors.initials: Y
authors.lastname: Ishibashi
authors.forename: Masafumi
authors.initials: M
authors.lastname: Yamashita
authors.forename: Toshiki
authors.initials: T
authors.lastname: Takahashi
authors.forename: Fuminori
authors.initials: F
authors.lastname: Kasashima
authors.forename: Jyunji
authors.initials: J
authors.lastname: Kishimoto
authors.forename: Akihiro
authors.initials: A
authors.lastname: Mizuno
authors.forename: Jyunichi
authors.initials: J
authors.lastname: Kei
authors.forename: Mikizou
authors.initials: M
authors.lastname: Nakai
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Suhara
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Endo
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nishina
authors.forename: Tadashi
authors.initials: T
authors.lastname: Furuyama
authors.forename: Masakazu
authors.initials: M
authors.lastname: Kawasaki
authors.forename: Keita
authors.initials: K
authors.lastname: Mikasa
authors.forename: Yoichirou
authors.initials: Y
authors.lastname: Ueno
keywords: abdominal aortic aneurysm; endovascular aneurysm repair; less invasive approach; multicenter cooperative study; open surgical repair
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