Feasibility and Safety Study of the Endologix Fenestrated Stent Graft System

The Endologix Fenestrated Stent Graft System that will be used in this study has three
components, listed below:

1. Endologix unibody bifurcated stent graft

2. Endologix fenestrated proximal extension stent graft

3. Endologix renal stent graft

Inclusion Criteria:

- Adequate iliac/femoral access compatible with the required delivery systems

- Non-aneurysmal infrarenal aortic neck <15mm in length

- Most caudal renal artery to aortoiliac bifurcation length >= 70

- SMA to aortoiliac bifurcation length >=90mm

- Proximal non-aneurysmal aortic neck below the SMA with diameter 18 to 34 mm, length
>=15mm and angle <=60° to the aneurysm sac

- Angle <=60° (clock face) between the SMA and CA

- Renal arteries both at or below the SMA by <=35mm and within 30mm of each other
axially, with 4 to 8mm lumen diameter, and with clockface angle of 90° to 210° to
each other

- Common iliac artery distal fixation site with: distal fixation length >=15mm, with
diameter >=10 mm and <=23 mm and angle <=90° to the aortic bifurcation

- Ability to preserve at least one hypogastric artery

Exclusion Criteria:

- Life expectancy <2 years as judged by the investigator

- Psychiatric or other condition that may interfere with the study

- Participating in the enrollment or 30-day follow-up phase of another clinical study

- Known allergy to any device component

- Coagulopathy or uncontrolled bleeding disorder

- Contraindication to contrast media or anticoagulants

- Ruptured, leaking, or mycotic aneurysm

- Aortic dissection Serum creatinine (S-Cr) level >2.0 mg/dL

- Traumatic vascular injury

- Active systemic or localized groin infection

- Connective tissue disease (e.g., Marfan's Syndrome)

- Recent(within prior three months)cerebrovascular accident

- Recent(within prior three months)myocardial infarction

- Prior renal transplant

- Length of either renal artery to be stented <12mm

- Significant occlusive disease or calcification of either renal artery (>70%)

- An essential accessory renal artery

- Indispensable inferior mesenteric artery

- Untreated aneurysmal disease of the descending thoracic aorta

- Clinically significant mural thrombus circumferentially in the suprarenal segment

- Prior iliac artery stent implanted that may interfere with delivery system
introduction

- Unsuitable vascular anatomy

- Pregnancy