for people ages 18-90 (full criteria)
at San Francisco, California and other locations
study started
completion around



The primary objective of the TORUS 2 IDE Clinical Study is to evaluate the safety and effectiveness of the TORUS Stent Graft System in the treatment of obstructive atherosclerotic lesions of the native SFA or the superficial femoral and/or proximal popliteal arteries.

Official Title

The PQ Bypass Pivotal IDE Intra-arterial Stent Graft Study for Occlusive and Re-stenotic Fem-pop Revascularization - 2 Trial: TORUS 2


Peripheral Arterial Disease, Peripheral Artery Disease, Superficial Femoral Artery, Popliteal Artery, Stent Graft, Peripheral Vascular Diseases, TORUS Stent Graft System


You can join if…

Open to people ages 18-90

  1. Patient is male or female, with age > 18 and ≤ 90 years at date of enrollment.
  2. Patient provides written informed consent before any study-specific investigations or procedures.
  3. Patient is willing to undergo all follow-up assessments according to the specified schedule over 36 months.
  4. Patient is a suitable candidate for angiography and endovascular intervention and, if required, is eligible for standard surgical repair.
  5. Patient has symptomatic peripheral arterial disease (PAD) of the lower extremities requiring intervention to relieve de novo obstruction or occlusion or restenosis of the native femoropopliteal artery.
  6. Patient has PAD classified as Rutherford classification 2, 3 or 4.
  7. Patient has documented PAD by either (i) a resting ankle-brachial index (ABI) of ≤ 0.90 (or ≤ 0.75 after exercise of the target limb). Resting toe brachial index (TBI) is performed only if unable to reliably assess ABI. TBI must be <0.70; or (ii) Normal ABI with angiographic, ultrasound, MRA, or CT evidence of ≥ 60% diameter stenosis.
  8. Patient has single or multiple stenotic, restenotic or occlusive lesions within the native femoropopliteal artery ("target lesions") that can be crossed with a guidewire and fully dilated.
  9. Single target lesion must be covered by a single stent. Tandem target lesions are considered a single continuous lesion if the gap between lesions is ≤ 5 cm and > 30% diameter stenosis between the lesion(s).

    10. Target lesion(s) eligible for treatment under the protocol are at least least 3 cm

    above the bottom of the femur.

    11. Target lesion(s) reference vessel diameter is between 5.0 mm and 6.7 mm by operator's

    visual estimate.

    12. Target lesion measures ≥ 80 mm to ≤ 180 mm in overall length, with ≥ 60% diameter

    stenosis by operator's visual estimate. Tandem target lesions are considered a single continuous lesion if the gap between lesions is ≤ 5 cm and > 30% diameter stenosis between the lesion(s).

    13. Patient has a patent popliteal artery (no stenosis ≥ 50%) distal to the treated


    14. Patient has at least one patent infrapopliteal vessel (< 50% stenosis) with run-off to

    the ankle.

You CAN'T join if...

  1. Patient is unable or is unwilling to comply with the procedural requirements of the study protocol or will have difficulty in complying with the requirements for attending follow-up visits.
  2. Patient has a comorbidity that in the investigator's opinion would limit life expectancy to less than 24 months.
  3. Patient has any planned major surgical procedure (including any amputation of the target limb) within 30 days after the index procedure for this study.
  4. Patient has a target vessel that has been treated with any type of surgical procedure prior to enrollment.
  5. Patient has a target vessel that has been treated with bypass surgery.
  6. Patient has PAD classified as Rutherford classification 0, 1, 5 or 6.
  7. Patient has known or suspected active systemic infection at the time of enrollment.
  8. Patient has a known coagulopathy or has bleeding diatheses, thrombocytopenia with platelet count less than 100,000/microliter or INR (international normalized ratio) >1.8.
  9. Patient has a stroke diagnosis within three months prior to enrollment.

    10. Patient has a history of unstable angina or myocardial infarction within 60 days prior

    to enrollment.

    11. Patient has a contraindication to antiplatelet, anticoagulant or thrombolytic


    12. Patient has known allergy to contrast agents or medications used to perform

    endovascular intervention that cannot be adequately pre-medicated.

    13. Patient has known allergy to titanium, nickel or tantalum (does not include mild

    contact dermatitis due to nickel allergy).

    14. Patient has received thrombolysis within 72 hours prior to the index procedure. 15. Patient has acute or chronic renal disease (e.g., as measured by a serum creatinine of

    > 2.5 mg/dL or > 220 μmol/L or GFR < 30 ml/min), or on peritoneal or hemodialysis.

    16. Patient requiring coronary intervention within seven days prior to enrollment. 17. Patient is pregnant or breast-feeding. 18. Patient is participating in another research study involving an investigational

    product (pharmaceutical, biologic or medical device).

    19. Patient has other medical, social or psychological problems that, in the opinion of

    the investigator, preclude them from receiving this treatment, and the procedures and evaluations pre- and post-treatment.

    20. Patient has significant disease or obstruction (≥ 50%) of the inflow tract that has

    not been successfully treated at the time of the index procedure (success measured as ≤ 30% residual stenosis, without complication).

    21. Patient has no patent (≥ 50% stenosis) outflow vessel providing run-off to the ankle. 22. There is a lack of full expansion in the predilatation balloon. 23. Evidence of aneurysm or acute thrombus in target vessel.


  • UCSF
    San Francisco California 94143 United States
  • Bay Area Vein & Vascular Institute
    Burlingame California 94010 United States


in progress, not accepting new patients
Start Date
Completion Date
Study Type
Expecting 188 study participants
Last Updated