title: Twin-tube endografts for aortic aneurysms: an experimental feasibility study.
abstract: OBJECTIVE
  To explore feasibility of twin-tube endografts (TTEGs) for treatment of abdominal aortic aneurysm (AAA).
  
  
  METHODS
  AAAs were created in six dogs by overdilation of Palmaz stents. TTEGs made of seven 9.5-mm-diameter Gianturco Rösch Z (GRZ) stents and covered with PTFE were deployed simultaneously from both femoral arteries through 10-F sheaths to exclude the AAA. Follow-up aortography was performed immediately and at 2, 4, and 8 weeks. Two dogs were killed at 4 weeks and four were killed at 8 weeks. Gross and histologic examinations were performed.
  
  
  RESULTS
  AAA creation and TTEG placement were successful in all six dogs. TTEGs completely excluded AAAs in five dogs. Minor temporary perigraft leak was seen in one dog immediately after stent placement. Four dogs had TTEGs patent to termination at 8 weeks. In two dogs with oversized TTEGs, one of the twin endografts occluded at 2 weeks. At autopsy, TTEGs were formed in semicircular shape and histology did not show any significant inflammatory reaction.
  
  
  CONCLUSIONS
  TTEGs show promise for treatment of AAA, with the potential of reducing the introductory sheath size. Further experimental studies, particularly with TTEGs extended into iliac arteries, are warranted.
authors.affiliation: Dotter Interventional Institute, Oregon Health Sciences University, Portland 97201-3098, USA.
authors.forename: S
authors.initials: S
authors.lastname: Sakaguchi
authors.forename: B T
authors.initials: BT
authors.lastname: Uchida
authors.forename: H A
authors.initials: HA
authors.lastname: Timmermans
authors.forename: D
authors.initials: D
authors.lastname: Pavcnik
authors.forename: Y
authors.initials: Y
authors.lastname: Sakai
authors.forename: F S
authors.initials: FS
authors.lastname: Keller
authors.forename: J
authors.initials: J
authors.lastname: Rösch
authors.forename: Q
authors.initials: Q
authors.lastname: Yin
authors.forename: K
authors.initials: K
authors.lastname: Kichikawa
authors.forename: H
authors.initials: H
authors.lastname: Uchida
mesh_terms: D000792:Angiography; D000818:Animals; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation; D020099:Coated Materials, Biocompatible; D004195:Disease Models, Animal; D004285:Dogs; D005240:Feasibility Studies; D009757:Nylons; D011474:Prosthesis Design; D013193:Stainless Steel; D016896:Treatment Outcome
chemical_list: D020099:Coated Materials, Biocompatible; D009757:Nylons; D013193:Stainless Steel