LIFE-BTK Randomized Controlled Trial (LIFE-BTK)

  • End date
    Mar 7, 2027
  • participants needed
  • sponsor
    Abbott Medical Devices
Updated on 7 June 2022


Pre-market clinical evaluation of the everolimus eluting Esprit™ BTK System for the planned treatment of narrowed infrapopliteal lesions.

Condition Critical Limb Ischemia (CLI)
Treatment ESPRIT™ BTK Device, Percutaneous Transluminal Angioplasty (PTA) Device, Esprit BTK Device
Clinical Study IdentifierNCT04227899
SponsorAbbott Medical Devices
Last Modified on7 June 2022


Yes No Not Sure

Inclusion Criteria

General Inclusion Criteria
Subject must provide written informed consent prior to any clinical investigation related procedure
Subject has symptomatic Critical Limb Ischemia (CLI), Rutherford Becker Clinical Category 4 or 5
Subject requires primary treatment of up to two de novo or restenotic (treated with prior PTA) infrapopliteal lesions
Subject must be at least 18 years of age
Female subject of childbearing potential should not be pregnant and must be on birth control
Note: Female subjects of child-bearing potential must have a negative pregnancy test done
within 7 days prior to the index procedure per site standard test
Anatomic Inclusion Criteria
Up to two native infrapopliteal lesions, each lesion located in separate
infrapopliteal vessel in the same limb. Restenotic (from prior PTA) lesions are
Lesion must be located in the proximal 2/3 of native infrapopliteal vessels, with
The total scaffold length among all target lesions must not exceed 170 mm
vessel diameter of ≥ 2.5 mm and ≤ 4.00 mm by investigator visual assessment
Total scaffold length to completely cover/treat a target lesion must not exceed
mm (total everolimus drug dose of 1790 µg)
The target vessel cannot have any other angiographic significant lesions (≥50%)
Tandem lesions are allowed if they are < 3 cm apart and the total scaffold length
used to cover the entire diseased segment is ≤ 170 mm. Each tandem lesion is
considered one lesion
Target lesion(s) must have ≥ 70% stenosis, per visual assessment at the time of the
procedure. If needed, quantitative imaging (angiography, IVUS, and/or OCT) can be used
to aid accurate sizing of the vessels
The distal margin of the target lesion must be located ≥ 10 cm proximal to the
proximal margin of the ankle mortise. The vessel segment distal to the target lesion
must be patent all the way to the ankle, with no significant lesion (≥ 50% stenosis)
Significant lesion (≥ 50% stenosis) in the inflow artery(ies) must be treated
successfully (as per physician's assessment of the angiography) through standard of
care prior to the treatment of the target lesion. Treatment can be done within the
same trial procedure
Non-target lesion(s) (if applicable) must be located in separate infrapopliteal
vessel(s) from the target lesion, and suitable to be treated per institution standard
of care
Guidewire must cross the target lesion successfully. Crossing in an antegrade fashion
is preferred, but retrograde crossing may be used. However, the treatment must be
delivered antegrade

Exclusion Criteria

General Exclusion Criteria
Subject is currently on dialysis
Subject is currently participating in another clinical investigation that has not yet
completed its primary endpoint
Pregnant or nursing subjects and those who plan pregnancy during the clinical
investigation follow-up period
Presence of other anatomic or comorbid conditions, or other medical, social, or
psychological conditions that, in the investigator's opinion, could limit the
subject's ability to participate in the clinical investigation or to comply with
follow-up requirements
Gangrene involving the plantar skin of the forefoot, midfoot, or heel
Incapacitated individuals, defined as persons who are mentally ill, mentally
handicapped, or individuals without legal authority, are excluded from the study
Full thickness heel ulcer with/without calcaneal involvement
Any wound with calcaneal bone involvement
Subject has had any amputation to the ipsilateral extremity other than the toe or
Wounds that are deemed to be neuropathic or non-ischemic in nature
forefoot, or subject has had major amputation to the contralateral extremity < 1 year
prior to index procedure and is not independently ambulating
Full thickness wounds on the dorsum of the foot with exposed tendon or bone
Subject has known hypersensitivity or contraindication to device material and its
Subject is unable or unwilling to provide written consent prior to enrollment
degradants (everolimus, poly (L-lactide), poly (DL-lactide), lactide, lactic acid) and
cobalt, chromium, nickel, platinum, tungsten, acrylic and fluoro polymers that cannot
Anatomic Exclusion Criteria
be adequately pre-medicated. Subject has a known contrast sensitivity that cannot be
adequately pre-medicated
Subject has known allergic reaction, hypersensitivity or contraindication to aspirin
Lesion that has prior metallic stent implant
or to ADP antagonists such clopidogrel, prasugrel or ticagrelor; or to anticoagulants
such as heparin or bivalirudin, and therefore cannot be adequately treated with study
medications. Subject with planned surgery or procedure necessitating discontinuation
of antiplatelet medications, within 12 months after index procedure. Planned
amputation that will necessitate discontinuation of antiplatelet medications is
Subject has life expectancy ≤ 1 year
Subject has had a stroke within the previous 3 months with residual Rankin score of ≥
No angiographic evidence of a patent pedal artery
Subject has renal insufficiency as defined as an estimated GFR < 30 ml/min per
Subject has platelet count < 100,000 cells/mm^3 or > 700,000 cells/mm^3, a WBC < 3,000
cells/mm^3, or hemoglobin < 9.0 g/dl
Subject has known serious immunosuppressive disease (e.g., human immunodeficiency
virus), or has severe autoimmune disease, that requires chronic immunosuppressive
therapy (e.g., systemic lupus erythematosus, etc.), or subject is receiving
immunosuppression therapy for other conditions. Subjects treated for HIV (Human
Immunodeficiency Virus) and who have undetectable viral load, such that their immune
system is not considered compromised, are eligible
Subject has Body Mass Index (BMI) <18
Subject is receiving or scheduled to receive anticancer therapy for malignancy within
months prior to index procedure or within 1 year after the procedure. Patients
taking medications classified as chemotherapy but who have been in remission for at
least 6 months are eligible
Subject has coagulation disorder that increases the risk of arterial thrombosis
Subjects with deep vein thrombosis and disorders that increase the risk of deep vein
thrombosis can be included in the study
Subject who requires thrombolysis as a primary treatment modality or requires other
treatment for acute limb ischemia of the target limb
Subject has previously had, or requires surgical revascularization involving any
vessel of the ipsilateral extremity. Prior femoropopliteal or aortobifemoral bypass is
allowed. Any bypass to the tibial arteries is not allowed
Subject has signs or symptoms of advanced limb infection or septicemia (fever > 38.5
WBC > 15,000 cells/microliter, hypotension) at the time of assessment. Osteomyelitis
of the phalanges or metatarsal heads (as described in exclusion criteria #21a) or
cellulitis of the foot amenable to treatment with IV antibiotics at the time of
revascularization is acceptable
Subject is bedridden or unable to walk (with assistance is acceptable). Subjects in
wheelchair who are able to mobilize on their own can be enrolled
Subject with extensive tissue loss salvageable only with complex foot reconstruction
or non-traditional transmetatarsal amputations. This includes subjects with
Osteomyelitis that extends proximal to the metatarsal heads. Osteomyelitis
limited to the phalanges or metatarsal heads is acceptable for enrollment
Deep ulcer or large shallow ulcer (> 3 cm) involving the plantar skin of the
forefoot, midfoot, or heel
Wounds that would require flap coverage or complex wound management for large
soft tissue defect
Subject has active symptoms and/or a positive test result of COVID-19 or other rapidly
spreading novel infectious agent within the prior 2 months
Lesions with severe calcification, in which there is a high likelihood that successful
pre-dilatation cannot be achieved
Significant (≥ 50% stenosis) lesion in a distal outflow artery that would be perfused
by the target vessel and that requires treatment at the time of the index procedure
Subject has had or will require treatment in any vessel with an everolimus drug-coated
or drug-eluting device < 30 days pre-study procedure, or during the index procedure
such that the cumulative (Esprit BTK plus everolimus-eluting device) everolimus drug
dose exceeds 1790 μg
Target or (if applicable) non-target vessel contains visible thrombus as indicated in
the angiographic images
Subject has angiographic evidence of thromboembolism or atheroembolism in the
ipsilateral extremity. (Pre- and post-angiographic imaging must confirm the absence of
emboli in the distal anatomy.)
Unsuccessfully treated proximal inflow limiting arterial stenosis or inflow-limiting
arterial lesions left untreated
Target or (if applicable) non-target lesion location requiring bifurcation treatment
method that requires scaffolding of both branches (provisional treatment, without
intention of scaffolding both branches is acceptable)
Aneurysm in the iliac, common femoral, superficial femoral, popliteal or target artery
of the ipsilateral extremity
Visual assessment of the target lesion suggests that the investigator is unable to
pre-dilate the lesion according to the vessel diameter
Target lesion has a high probability that atherectomy will be required at the time of
index procedure for treatment of the target vessel
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