Study of the RelayPro Thoracic Stent-Graft in Subjects With an Acute, Complicated Type B Aortic Dissection

  • STATUS
    Recruiting
  • End date
    Mar 31, 2027
  • participants needed
    80
  • sponsor
    Bolton Medical
Updated on 27 February 2022

Summary

This clinical trial is a prospective, multicenter, non-blinded, non-randomized study designed to assess the RelayPro thoracic endografts in the treatment of acute, complicated type B aortic dissection. The primary endpoint will measure all-cause mortality at 30 days post-procedure.

Description

This clinical trial is a prospective, multicenter, non-blinded, non-randomized study designed to assess the RelayPro thoracic endografts in the treatment of acute, complicated type B aortic dissection. The primary endpoint will measure all-cause mortality at 30 days post-procedure.

Subjects will be enrolled on a first come, first serve basis; however, no single investigational site may enroll more than 20% of the proposed sample size of up to 80 subjects. A subject is considered enrolled when arterial access is gained and an attempt is made to introduce the RelayPro Thoracic Stent-Graft. Enrollment is expected to begin in mid-2016 and complete by the end of 2020.

All subjects enrolled, as defined above, will be included in the patient population for the primary safety analyses. All subjects implanted with the RelayPro Thoracic Stent-Graft will be included in the patient population for the primary effectiveness analyses.

Details
Condition Aortic Dissection Type B
Treatment Relay Pro Stent-Graft
Clinical Study IdentifierNCT03033043
SponsorBolton Medical
Last Modified on27 February 2022

Eligibility

Yes No Not Sure

Inclusion Criteria

Subject must have an acute (symptom onset to diagnosis within 2 weeks)or subacute, complicated type B aortic dissection (entire dissection is distal to the left subclavian artery (LSA)), confirmed by Computed Tomography Angiography (CTA) or Magnetic Resonance Angiogram (MRA), with time from symptom onset to diagnosis 6 weeks, with at least one of the following
Malperfusion of the viscera, kidneys, spinal cord, or lower extremities, measured by clinical or radiographic evidence
Rupture
Intractable pain
Proximal and distal aortic neck with diameter between 19 mm and 42 mm
Subject's anatomy must meet all of the following anatomical criteria
Proximal attachment zone distal to the left common carotid and a distal attachment zone proximal to the origin of the celiac artery. (Dissection is permitted in the distal attachment zone but is not permitted in the proximal attachment zone.)
The length of the attachment zones will depend on the intended stent-graft diameter and type of graft selected
The proximal attachment zone should be 15 mm for 22 - 28 mm RelayPro grafts with bare stent (20 mm for RelayPro grafts with non-bare stent), 20 mm for 30 - 46 mm RelayPro grafts with bare stent (25 mm for RelayPro grafts with non-bare stent), and proximal to non-dissected segment (healthy zone)
The distal attachment zone should be 20 mm for all RelayPro grafts
Coverage of the left subclavian artery is permitted with mandatory revascularization if patent left internal mammary artery (LIMA) bypass or left upper extremity (LUE) arteriovenous graft or anomalous vertebral artery off the aorta. Revascularization must be performed prior to device placement, and may occur during implant procedure, provided it is before coverage of the LSA by the endograft
Proximal attachment zone containing a straight segment (non-tapered, non-reverse-tapered, defined by <10% diameter change) with lengths equal to or greater than the required attachment length for the intended device
Vascular dimensions (e.g., aortic diameters, length from left subclavian to celiac artery) must be in the range that can be safely treated with the RelayPro Thoracic Stent-Grafts
Adequate iliac or femoral artery access for introduction of the RelayPro Delivery System. Alternative methods to gain proper access may be utilized (e.g., iliac conduit)
Subject willing to comply with the follow-up evaluation schedule
Subject (or Legally Authorized Representative, LAR) agrees to sign an Informed Consent Form prior to treatment

Exclusion Criteria

Diagnosis of traumatic injury or transection of the descending thoracic aorta
Significant stenosis, calcification, thrombus, or tortuosity of intended fixation sites that would compromise fixation or seal of the device
Planned coverage of left carotid or celiac arteries; or anatomic variants that would compromise circulation to the carotid, vertebral, or innominate arteries after device placement, which is not amenable to subclavian revascularization
Prior endovascular or surgical repair in the descending thoracic aorta. The device may not be placed within any prior endovascular or surgical graft
Concomitant aneurysm/disease of the ascending aorta, aortic arch, or abdominal aorta, requiring repair. Dissection extension into the abdominal aorta is acceptable
Prior abdominal aortic aneurysm repair (endovascular or surgical) that was performed less than 6 months prior to the planned stent implant procedure
Major surgical or medical procedure within 30 days prior to the planned procedure, or is scheduled for a major surgical or medical procedure within 30 days post implantation. This excludes any planned procedures for the prospective stent-graft placement
Untreatable allergy or sensitivity to contrast media or device components, including metal stents
Known or suspected connective tissue disorder
Blood coagulation disorder or bleeding diathesis for which the treatment cannot be suspended for one week pre- and/or post-repair
Coronary artery disease with unstable angina
Severe congestive heart failure (New York Heart Association functional class IV)
Stroke and/or Myocardial Infarction (MI) within 3 months of the planned treatment date
Pulmonary disease requiring the routine (daily or nightly) need for oxygen therapy outside the hospital setting
Acute renal failure or chronic renal insufficiency, and not receiving dialysis
Hemodynamically unstable
Active systemic infection and/or mycotic aneurysms
Bowel necrosis
Morbid obesity or other condition that may compromise or prevent the necessary imaging requirements
ASA risk classification = V (Moribund patient not expected to live 24 hours with or without operation)
Less than two-year life expectancy
Current or planned participation in an investigational drug or device study that has not completed primary endpoint evaluation
Currently pregnant or planning to become pregnant during the course of the study
Medical, social, or psychological issues that Investigator believes may interfere with treatment or follow-up
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