title: Hypogastric artery bypass to preserve pelvic circulation: improved outcome after endovascular abdominal aortic aneurysm repair.
abstract: OBJECTIVE
  This study was carried out to compare the functional outcomes after hypogastric artery bypass and coil embolization for management of common iliac artery aneurysms in the endovascular repair of aortoiliac aneurysms (EVAR).
  
  
  METHODS
  Between 1996 and 2002, 265 patients underwent elective or emergent EVAR. Data were retrospectively reviewed for 21 (8%) patients with iliac artery aneurysms 25 mm or larger that involved the iliac bifurcation. Patients underwent hypogastric artery bypass (n = 9) or coil embolization (n = 12). Interviews about past and current levels of activity were conducted. A disability score (DS) was quantitatively graded on a discrete scale ranging from 0 to 10, corresponding to "virtually bed-bound" to exercise tolerance "greater than a mile." Worsening or improvement of symptoms was expressed as a difference in DS between two time points (-, worsening; +, improvement).
  
  
  RESULTS
  There was no difference in age (72.6 +/- 7.3 years vs 73.1 +/- 6.4 years), sex (male-female ratio, 8:1 vs 11:1), abdominal aortic aneurysm size (60.1 +/- 5.9 mm vs 59.3 +/- 7.0 mm), or number of preoperative comorbid conditions (1.9 +/- 0.8 vs 2.1 +/- 0.8) between hypogastric bypass and coil embolization groups, respectively. Mean follow-up was shorter after hypogastric bypass (14.8 vs 20.5 months; P <.05). There was no difference in the mean overall baseline DS between the bypass and the embolization groups (8.0 vs 7.8). Six (50%) of the 12 patients with coil embolization reported symptoms of buttock claudication ipsilateral to the occluded hypogastric artery. No symptoms of buttock claudication were reported after hypogastric bypass (P <.05). There was a decrease in the DS after both procedures; however, coil embolization was associated with a significantly worse DS compared with hypogastric artery bypass (4.5 vs 7.3; P <.001). In 4 (67%) of 6 patients with claudication after coil embolization symptoms improved, with a DS of 5.4 at last follow-up. This was significantly worse than in patients undergoing hypogastric artery bypass, with a DS of 7.8 at last follow-up (P <.001). There was no difference between the groups in duration of procedure, blood loss, length of hospital stay, morbidity, or mortality (0%).
  
  
  CONCLUSIONS
  Hypogastric artery bypass to preserve pelvic circulation is safe, and significantly decreases the risk for buttock claudication. Preservation of pelvic circulation results in significant improvement in the ambulatory status of patients with common iliac artery aneurysms, compared with coil embolization.
authors.affiliation: Division of Vascular Surgery, Stanford University Medical Center, Stanford University, Stanford, CA 94305, USA. farko@stanford.edu
authors.forename: Frank R
authors.initials: FR
authors.lastname: Arko
authors.forename: W Anthony
authors.initials: WA
authors.lastname: Lee
authors.forename: Bradley B
authors.initials: BB
authors.lastname: Hill
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Fogarty
authors.forename: Christopher K
authors.initials: CK
authors.lastname: Zarins
mesh_terms: D000368:Aged; D017544:Aortic Aneurysm, Abdominal / Q000628:therapy*; D001166:Arteriovenous Shunt, Surgical; D019917:Blood Vessel Prosthesis Implantation; D002081:Buttocks / Q000098:blood supply; D016022:Case-Control Studies; D004621:Embolization, Therapeutic; D005260:Female; D006801:Humans; D017543:Iliac Aneurysm / Q000628:therapy*; D008297:Male; D010388:Pelvis / Q000098:blood supply; D015607:Stents; D013270:Stomach / Q000098:blood supply