title: [Effect of the size of abdominal aortic aneurysm on endovascular exclusion and its results].
abstract: OBJECTIVE
  To evaluate the effect of the diameter of abdominal aortic aneurysm (AAA) on endovascular exclusion (EVE) and its results.
  
  
  METHODS
  From March 1997 to June 2007, 429 AAA patients were treated with endovascular stent-graft exclusion. According to the maximal diameter of abdominal aortic aneurysm, the patients were divided into two groups: group A (diameter < 55 mm, n = 274) and group B (diameter > or = 55 mm, n = 155). The diameter of AAA, involvement of iliac artery, length, diameter and distortion of aneurismal neck in the two groups were recorded and compared retrospectively.
  
  
  RESULTS
  Patients in group B were significantly older than group A (73.7 vs 71.1 years, P < 0.05). More patients in group B was complicated with coronary artery disease than those in group A (P < 0.05). The mean diameter of AAA in group A was (46.6 +/- 6.8) mm, and (66.8 +/- 11.2) mm in group B (P < 0.05). Proximal aneurysmal necks were shorter, wider and more tortuous in group B than those in group A (P < 0.05). Extraperitoneal approach, embolism of inner iliac artery and reconstruction of another inner iliac artery and stretch technique were more applied in group B. There were more endoleak during operation in group B and more stent-grafts were used. There was significant difference in morbidity rate between the two groups, while no statistic difference in mortality. And in group B, there were a high rate of endoleak and secondary intervention post operation.
  
  
  CONCLUSIONS
  The diameter of AAA affects EVE and its results. In small aneurysms, EVE carries better outcome than in big aneurysms.
authors.affiliation: Department of Vascular Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China.
authors.forename: Liang-xi
authors.initials: LX
authors.lastname: Yuan
authors.forename: Jun-min
authors.initials: JM
authors.lastname: Bao
authors.forename: Zhi-qing
authors.initials: ZQ
authors.lastname: Zhao
authors.forename: Le-feng
authors.initials: LF
authors.lastname: Qu
authors.forename: Xiang
authors.initials: X
authors.lastname: Feng
authors.forename: Qing-sheng
authors.initials: QS
authors.lastname: Lu
authors.forename: Rui
authors.initials: R
authors.lastname: Feng
authors.forename: Zhi-jun
authors.initials: ZJ
authors.lastname: Mei
authors.forename: Yi-fei
authors.initials: YF
authors.lastname: Pei
authors.forename: Zai-ping
authors.initials: ZP
authors.lastname: Jing
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D017544:Aortic Aneurysm, Abdominal / Q000473:pathology* / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D015607:Stents; D016896:Treatment Outcome