title: Modular bifurcation endoprosthesis for treatment of abdominal aortic aneurysms.
abstract: OBJECTIVE
  The authors analyzed a single group's experience treating abdominal aortic aneurysms (AAAs) with a new self-expanding, modular, bifurcated device.
  
  
  BACKGROUND
  Successful exclusion of AAAs by prototype devices has led to several controlled clinical trials evaluating prostheses designed and manufactured specifically for this application.
  
  
  METHODS
  Sixteen patients (15 males, 1 female) of American Society of Anesthesiologists grade 2 through 4 and average age of 72 years had AAAs (average 57-mm diameter) treated as part of a phase I Food and Drug Administration-approved trial.
  
  
  RESULTS
  All patients were treated successfully with no surgical conversions. No endoleaks or aneurysm enlargement was noted either predischarge by contrast computed tomography or on follow-up at 1 month by duplex ultrasound examination. At 6 months, 12 of 13 patients who were observed for this interval had no endoleaks, whereas one patient (patient 3) showed a small area of extravasation that appeared to arise from the device in an area that was traumatized at the time of deployment. One procedure-related mortality (6%) occurred in a patient who died of septic complications secondary to a gangrenous gallbladder diagnosed 1 day after the procedure. There were no device-related mortalities. Complications included two iliac artery dissections, two groin wound infections, and two transient elevations of serum creatinine. Other significant variables including median procedure length (5 hours), intensive care unit stay (1 day), hospitalization postprocedure (4.5 days), and blood loss (1100 mL) all decreased as the study progressed. Blood replacement in all but three patients was accomplished by autotransfusion or banked-autologous blood replacement. At 6-month follow-up in 13 patients, the maximum diameter of the aneurysm decreased by an average of 5.6 mm (range, 0-15 mm), and the maximal cross-sectional area decreased an average of 20.3% (range, 0-72%).
  
  
  CONCLUSIONS
  This study suggests that endovascular prosthesis exclusion of AAAs using a self-expanding modular device may be effective in many patients who are otherwise surgical candidates for repair if further clinical studies confirm these observations.
authors.affiliation: Department of Surgery, Harbor-UCLA Medical Center, Torrance, California 90509, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: White
authors.forename: C E
authors.initials: CE
authors.lastname: Donayre
authors.forename: I
authors.initials: I
authors.lastname: Walot
authors.forename: G E
authors.initials: GE
authors.lastname: Kopchok
authors.forename: E
authors.initials: E
authors.lastname: Wilson
authors.forename: M
authors.initials: M
authors.lastname: Heilbron
authors.forename: F
authors.initials: F
authors.lastname: Hussain
authors.forename: C
authors.initials: C
authors.lastname: deVirgilio
authors.forename: R
authors.initials: R
authors.lastname: Buwalda
authors.forename: T J
authors.initials: TJ
authors.lastname: Fogarty
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging / Q000601:surgery*; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects / Q000401:mortality; D003287:Contrast Media; D005240:Feasibility Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007902:Length of Stay; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D012074:Remission Induction; D015996:Survival Rate; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media