title: Midterm results of endovascular abdominal aortic aneurysm repair: comparison of instruction-for-use (IFU) cases and non-IFU cases.
abstract: OBJECTIVE
  To investigate the midterm results of abdominal aortic aneurysm repair (EVAR) and compare the endoleak (EL) and abdominal aortic aneurysm (AAA) prognoses between instruction-for-use (IFU) patients and non-IFU patients.
  
  
  METHODS
  Of 124 patients (104 men, 20 women; mean age 76.2 years; age range 58-93 years) with AAA who underwent EVAR with the Zenith (68 patients) or Excluder device (56) and were analyzed, 86 were IFU and 38 non-IFU.
  
  
  RESULTS
  The mean absorbed dose of radiation exposure was 1907 mGy in the IFU group and 2283 mGy in the non-IFU group (p = 0.013). Thirty-five patients experienced EL: 8 (6.5 %) type I and 27 (21.8 %) type II. Type I ELs were observed in 3 patients in the IFU group (3.5 %) and 5 patients in the non-IFU group (13.2 %). Of the 14 patients with AAA diameter expansion of ≥ 5 mm, 6 (6/86, 7.0 %) belonged to the IFU group and 8 (8/38, 21.1 %) to the non-IFU group (p = 0.027).
  
  
  CONCLUSIONS
  The frequency of AAA expansion ≥ 5 mm was higher in non-IFU patients than in IFU patients. Therefore, careful follow-up is necessary for non-IFU patients rather than IFU patients.
authors.affiliation: Department of Radiology, Wakayama Medical University, 811-1 Kimiidera, Wakayama-shi, Wakayama, 641-8510, Japan.
authors.forename: Motoki
authors.initials: M
authors.lastname: Nakai
authors.forename: Morio
authors.initials: M
authors.lastname: Sato
authors.forename: Hirotatsu
authors.initials: H
authors.lastname: Sato
authors.forename: Hinako
authors.initials: H
authors.lastname: Sakaguchi
authors.forename: Fumihiro
authors.initials: F
authors.lastname: Tanaka
authors.forename: Akira
authors.initials: A
authors.lastname: Ikoma
authors.forename: Hiroki
authors.initials: H
authors.lastname: Sanda
authors.forename: Kouhei
authors.initials: K
authors.lastname: Nakata
authors.forename: Hiroki
authors.initials: H
authors.lastname: Minamiguchi
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Kawai
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Sonomura
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Nishimura
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Okamura
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015901:Angiography, Digital Subtraction / Q000379:methods; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging* / Q000601:surgery*; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000295:instrumentation*; D003287:Contrast Media; D057867:Endoleak / Q000000981:diagnostic imaging*; D057510:Endovascular Procedures / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000379:methods; D018570:Risk Assessment / Q000379:methods; D016019:Survival Analysis; D036542:Tomography, Spiral Computed / Q000379:methods; D016896:Treatment Outcome
chemical_list: D003287:Contrast Media