Clinical Study of Abdominal Aortic Aneurysm Exclusion (TALENT Abdominal)

The recruitment status of this study is unknown because the information has not been verified recently.
Verified May 2009 by Arizona Heart Institute.
Recruitment status was  Active, not recruiting
Sponsor:
Information provided by:
Arizona Heart Institute
ClinicalTrials.gov Identifier:
NCT00549432
First received: October 24, 2007
Last updated: May 14, 2009
Last verified: May 2009
  Purpose

The purpose of the study is to evaluate the TALENT endoluminal stent-graft system in patients with abdominal aortic aneurysms. The TALENT endoluminal stent-graft system is a flexible, implantable endoluminal vascular device preloaded in a placement system that is used to exclude abdominal aortic aneurysms.


Condition Intervention
Abdominal Aortic Aneurysm
Device: TALENT Enhanced LPS Endoluminal Stent-Graft System

Study Type: Interventional
Study Design: Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Clinical Study of Abdominal Aortic Aneurysm Exclusion Using the TALENT Enhanced LPS Endoluminal Stent-Graft System

Resource links provided by NLM:


Further study details as provided by Arizona Heart Institute:

Primary Outcome Measures:
  • Determine the proportion in whom successful implantation is achieved, as indicated by aneurysm exclusion and graft patency. [ Time Frame: At implant, time of discharge, and 1, 6, and 12 months. ] [ Designated as safety issue: Yes ]

Secondary Outcome Measures:
  • Determine the proportion of patients who experience adverse events. [ Time Frame: During and after implantation. ] [ Designated as safety issue: No ]
  • Determine the proportion of patients who experience comorbidities and overall mortality rates. [ Time Frame: During and after implantation. ] [ Designated as safety issue: No ]

Estimated Enrollment: 75
Study Start Date: October 2002
Estimated Study Completion Date: October 2012
Estimated Primary Completion Date: October 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1 Device: TALENT Enhanced LPS Endoluminal Stent-Graft System
roadmapping, and angiography for proper implant positioning. The TALENT endoluminal stent-graft endoprosthesis is inserted by delivery catheter and introducer sheath via a surgical cutdown (e.g., external iliac artery, femoral artery) approach. The insertion method depends on each patient's anatomy and is determined by the Clinical Investigator.

  Hide Detailed Description

Detailed Description:

An aneurysm is a localized dilatation of a blood vessel at least 1 1/2 to 2 times the normal vessel diameter. Abdominal aortic aneurysms are relatively common, and have been detected in 1.3% to 2.7% of patients 65 to 80 years of age (Blum, et al, 1996; Collins, Araujo, and Lindsell, 1988; Scott, Ashton, and Kay, 1991). A large proportion (up to 50%) of patients with untreated AAAs experience rupture and exsanguination (Johansen, 1995). Ruptured AAAs are the 13th leading cause of death in the US, accounting for more than 15,000 deaths per year (Cronenwett and Sampson, 1995).

Conventional treatment of abdominal aortic aneurysms is by a surgical procedure involving midline laparotomy, aortic clamping, aortic bypass, and blood loss with associated transfusion. Improvements in surgical techniques and patient care have allowed the mortality rate associated with this procedure to be reduced to approximately 5%, when elective repair is done prior to rupture of the aneurysm. Risks of surgery increase when the patient is considered to be a poor candidate for surgery.

Due to progress made in interventional radiology and endovascular surgery, it is now possible to treat aneurysms without an abdominal surgical procedure, thus potentially further reducing the risks associated with elective repair. This new therapeutic approach consists of transfemoral introduction of a metallic stent coupled with a vascular graft. When the stent device is deployed and expanded within the aneurysmal blood vessel, it creates a new aortic lumen for blood flow, effectively excluding the aneurysm sac from the flow while maintaining perfusion to the lower limbs. This less invasive technique is designed to prevent the need for laparotomy, to reduce the need for blood transfusions, to decrease the use of anesthetics and other drugs, and to speed recovery time.

The objective of this study is to evaluate the safety and effectiveness of the TALENT endoluminal stent-graft system in patients who may be categorized as standard risk, high risk or other indications. Standard risk patients are patients with indications for treatment that are consistent with those for a manufacturer IDE, when there is no active enrollment in the IDE. High risk patients are patients who do not meet the entrance criteria for the manufacturer sponsored IDE as they are at high risk of morbidity and mortality with standard surgical repair. Other indications would be considered patients with indications for treatment outside of those or the manufacturer sponsored IDE.

This study will be performed in both high risk and low risk patients who are considered good candidates for endoluminal repair of abdominal aortic aneurysms. Patients should be heparinized during the implant procedure such that an activated clotting time of 300 seconds is achieved. During implantation of the TALENT endoluminal stent-graft, the pre-implant CT scan and available angiograms are used together with (on-the-table) digital subtraction angiography (DSA), roadmapping, and angiography for proper implant positioning. The TALENT endoluminal stent-graft endoprosthesis is inserted by delivery catheter and introducer sheath via a surgical cutdown (e.g., external iliac artery, femoral artery) approach. The introducer sheath and delivery catheter containing the stent-graft is inserted over a guidewire and advanced into the aorta and above the aneurysm. With the delivery catheter in the correct position, the push rod is held stationary while the outer sheath is slowly withdrawn. The introducer sheath is then withdrawn further until the stent-graft is completely deployed. The balloon may be inflated along the full length of the implanted device to model the springs against the vessel wall and to unravel possible wrinkles in the graft fabric. After deployment of the stent-graft, angiography is performed to verify implant position and to check for the presence of endoleaks.

Subjects will undergo an evaluation of the TALENT endoluminal stent-graft to determine the safety and efficacy of the device as indicated by the adverse event rate, and to determine the risk factors that are most predictive of a successful outcome when used to exclude abdominal aortic aneurysms that require suprarenal fixation in high risk and low risk patients. Follow-up will be completed at 1, 6, 12, 24, 36, 48, and 60 months. Subject evaluation at 1 month will include a complete Physical Examination, Bilateral ABIs, and a Duplex Ultrasound (if not previously completed at time of discharge). Subject evaluation at 6 months will also include a Complete Physical Examination, Bilateral ABIs, Duplex Ultrasound, and Abdominal X-ray (AP, Lateral, 2 Obliques). Subject evaluation at 12, 24, 36, 48, and 60 months will include a Complete Physical Examination, Bilateral ABIs, Abdominal X-ray (AP, Lateral, 2 Obliques), and Spiral CT scan with and without IV Contrast 2.5mm.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Subject is ≥ 18 years of age.
  • Subject has a proximal AAA neck (distance between the top of the aneurysm and the renal arteries) ≥ 5 mm.
  • Subject has a proximal aortic neck diameter ≥ 14 mm and ≤ 32 mm.
  • Subject has an angle between the suprarenal aorta and the aneurysm ≤ 60°.
  • Subject has renal arteries ≥ 9 cm from the aortic neck bifurcation.
  • Subject has proximal and distal iliac neck diameters ≥ 8 mm and ≤ 24 mm.
  • Subject has a distal iliac neck length ≥ 15 mm.
  • Subject has signed the informed consent.
  • Subject will be available for follow-up at periodic intervals after the procedure.

Exclusion Criteria:

  • Subject has a document patent inferior mesenteric artery and an occluded or stenotic celiac and superior mesenteric artery.
  • Subject has a lesion that cannot be crossed with a guide wire.
  • Subject whose arterial access site cannot accommodate the delivery catheter.
  • Subject has no distal vascular bed.
  • Subject has systemic infection, or is suspected of having systemic infection.
  • Subject has an untreatable bleeding diathesis.
  • Subject is not available or is not willing to come back for periodic follow-up (surveillance) after the procedure.
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00549432

Locations
United States, Arizona
Arizona Heart Institute
Phoenix, Arizona, United States, 85006
Sponsors and Collaborators
Arizona Heart Institute
Investigators
Principal Investigator: Edward B Diethrich, M.D. Arizona Heart Institute
  More Information

Publications:
Cronenwett JL and LN Samspon. 1995. Aneurysms of the abdominal aorta and iliac arteris. In Current Diagnosis and Treatment in Vascular Surgery, 1st edition, RH Dean, JST Yao and DC Brewster, eds. Appleton and Lange, Norwalk, CT. pp 220-238.
Gloviczki P. Ruptured abdominal aortic aneurysms. In Vascular Surgery, 4th edition, Rutherford, RB, ed. Saunders, Philadelphia, PA, chapter 76.
Perler BA. 1995. Natural history of abdominal aortic aneurysm. A clinical presentation. Seventh Annual International Symposium on Vascular Diagnosis and Intervention. pp. 173-175.
Rose WW and CB Ernst. 1995. Abdominal aortic aneurysm. Comprehensive Ther, 21 (7):339-343.

Responsible Party: Edward B. Diethrich, MD, Arizona Heart Institute
ClinicalTrials.gov Identifier: NCT00549432     History of Changes
Other Study ID Numbers: G020149
Study First Received: October 24, 2007
Last Updated: May 14, 2009
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Aneurysm
Aortic Aneurysm
Aortic Aneurysm, Abdominal
Vascular Diseases
Cardiovascular Diseases
Aortic Diseases

ClinicalTrials.gov processed this record on April 17, 2014