RecruitingNot ApplicableNCT05313165

PROMISE III: Percutaneous Deep Vein Arterialization for the Treatment of Late-Stage Chronic Limb-Threatening Ischemia

Percutaneous Deep Vein Arterialization for the Treatment of Late-Stage Chronic Limb-Threatening Ischemia: The PROMISE III Trial


Sponsor

LimFlow, Inc.

Enrollment

100 participants

Start Date

Dec 22, 2022

Study Type

INTERVENTIONAL

Conditions

Summary

A prospective, single-arm, multi-center study designed to gather additional information on the LimFlow System.


Eligibility

Min Age: 18 YearsMax Age: 95 Years

Inclusion Criteria16

  • Subject must be ≥ 18 and ≤ 95 years of age
  • Clinical diagnosis of chronic limb-threatening ischemia, defined as any of the following clinical assessments: previous angiogram or hemodynamic evidence of severely diminished arterial inflow of the index limb (e.g., ABI ≤ 0.39, TP / TcPO2 \< 30 mm Hg) and
  • Rutherford Classification 5, ischemic ulceration or
  • Rutherford Classification 6, ischemic gangrene
  • Subject has been assessed by the Principal Investigator and determined that no conventional distal bypass, surgical or endovascular therapy for limb salvage is feasible due to either a) absence of a usable pedal artery target (endovascular or surgical approach), or b) the presence of a pedal artery target with absence of a viable single-segment vein in either lower extremity or either arm that could be used for autogenous vein conduit.
  • Proximally, the Target In-flow Artery at the cross-over point must fall within the recommended vessel diameter ranges for the LimFlow stent graft by visual estimation.
  • Subject is willing and able to sign the informed consent form.
  • Subject is enrolled in an acceptable wound care network and has an adequate support network to ensure that subject is compliant with medication regimen and follow-up study visits.
  • Prior to enrollment (7-day window), women of childbearing potential must have a negative pregnancy test.
  • Primary wound is stable (e.g., not rapidly deteriorating and/or showing signs of healing).
  • Stable glycemic control, HbA1C \< 10% (\<269mg/dL)
  • Subjects requiring dialysis may be included, provided they meet all the following requirements:
  • On dialysis for \> 6 months
  • Autologous arteriovenous (AV) fistula or peritoneal access used for hemodialysis
  • Serum albumin \> 30 g/liter
  • BMI \> 20

Exclusion Criteria15

  • Concomitant hepatic insufficiency, thrombophlebitis in the target limb, or non-treatable coagulation disorder within the past 90 days.
  • Active immunodeficiency disorder or currently receiving immunosuppressant therapy for an immunodeficiency disorder.
  • Prior peripheral arterial bypass procedure above or below the knee which would inhibit proximal inflow to the stent graft.
  • Absence of adequate viable tissue in target foot.
  • Life expectancy less than 12 months.
  • Documented myocardial infarction or stroke within previous 90 days.
  • Active infection (e.g., fever, significantly elevated WBC count \>20.0 x 109/L, and/or positive blood culture) at the time of the index procedure that may preclude insertion of a prosthesis or require major amputation (e.g., osteomyelitis proximal to metatarsals).
  • Known or suspected allergies or contraindications to aspirin or P2Y12 inhibitors, heparin, stainless steel, nitinol or contrast agent that cannot be adequately pre-treated.
  • Subject is currently taking anti-coagulants, which in the opinion of the investigator, interferes with the subject's ability to participate in the study (i.e., intermittent interruption of therapy for procedure may compromise subject's safety).
  • Lower extremity vascular disease that may inhibit the procedure and/or jeopardize wound healing (e.g., vasculitis, Buerger's disease, significant edema in the target limb, deep venous thrombus in the target vein, hyperpigmentation, or medial ulceration above the ankle).
  • Significant acute or chronic kidney disease with a serum creatinine of \> 2.5 mg/dl in subjects not undergoing dialysis.
  • Severe heart failure (e.g., NYHA Class IV), which in the opinion of the investigator may compromise subject's ability to safely undergo a percutaneous procedure.
  • Any significant concurrent medical, psychological, or social condition, which may significantly interfere with the subject's optimal participation in the study, in the opinion of the investigator.
  • The subject is currently participating in another investigational drug or device study that has not completed the primary endpoint or that clinically interferes with the endpoints of this study.
  • Subject is unwilling, unable, or unlikely for cognitive or social reasons to comply with any of the protocol or follow-up requirements.

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Interventions

DEVICELimFlow Stent Graft System

Creation of an arteriovenous fistula in the desired limb location


Locations(30)

University of California, San Diego Health

La Jolla, California, United States

Stanford University School of Medicine

Palo Alto, California, United States

UCSF

San Francisco, California, United States

Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center

Torrance, California, United States

Yale University

New Haven, Connecticut, United States

The Cardiac and Vascular Institute

Gainesville, Florida, United States

University of Florida

Gainesville, Florida, United States

Tallahassee Research Institute

Tallahassee, Florida, United States

Rush University Medical Center

Chicago, Illinois, United States

Massachusetts General Hospital

Boston, Massachusetts, United States

Boston Medical Center

Boston, Massachusetts, United States

UMass Chan Medical School

Worcester, Massachusetts, United States

Washington University / Barnes Jewish

St Louis, Missouri, United States

Dartmouth-Hitchcock Medical Center

Lebanon, New Hampshire, United States

Vascular Institute of Atlantic Medical Imaging

Pomona, New Jersey, United States

Holy Name Medical Center

Teaneck, New Jersey, United States

Presbyterian Healthcare

Albuquerque, New Mexico, United States

Northwell Health Long Island Jewish Medical Center

Lake Success, New York, United States

NYU Langone Health

New York, New York, United States

Mount Sinai

New York, New York, United States

Cornell University

New York, New York, United States

Atrium Health

Charlotte, North Carolina, United States

University Hospitals Cleveland Medical Center

Cleveland, Ohio, United States

Penn State Health

Hershey, Pennsylvania, United States

University of Pennsylvania

Philadelphia, Pennsylvania, United States

Vanderbilt University Medical Center

Nashville, Tennessee, United States

UT Southwestern Medical Center

Dallas, Texas, United States

Sentara Norfolk General Hospital

Norfolk, Virginia, United States

Ascension Columbia St. Mary's Hospital

Milwaukee, Wisconsin, United States

The Medical College of Wisconsin

Milwaukee, Wisconsin, United States

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