Clinical trial NCT00637741: DURABILITY-200: EverFlex 200mm Long Nitinol Stents in TASC C&D Femoropopliteal Lesions
Official title: Physician Initiated Trial Investigating the Efficacy of the Implant of EverFlex 200mm Long Nitinol Stents in TASC C&D Femoropopliteal Lesions
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE4
Conditions: Peripheral Vascular Disease
Intermittent Claudication
Critical Limb Ischemia
Keywords: Peripheral Vascular Disease
Intermittent claudication
Critical Limb Ischemia
TASC
Lead sponsor: Flanders Medical Research Program
Sponsor class: NETWORK
First posted: 2008-03-18
Enrollment: 100
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NON_RANDOMIZED
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The objective of this clinical investigation is to evaluate the long-term (up to 12 months) outcome of the 200 mm long self-expanding nitinol EverFlex (ev3) stent in long femoropopliteal lesions (TASC C \& D) Is is the first time that the use of 200 mm long stents will be evaluated in these lesions. It is expected that the outcome of the treatment with this type of long stents will be better as the treatment of identical lesions lengths with multiple shorter stents.


Eligibility criteria: Inclusion Criteria:

GENERAL

* De novo, restenotic or reoccluded lesion located in the femoropopliteal arteries suitable for stenting
* Patient presenting a score from 2 to 5 following Rutherford classification
* Patient is willing to comply with specified follow-up evaluations at the specified times
* Patient is \>18 years old
* Patient (or their legal representative) understands the nature of the procedure and provides written informed consent, prior to enrolment in the study
* Prior to enrollment, the guidewire has crossed target lesion
* Patient is eligible for treatment with the self-expanding nitinol EverFlex (ev3) stent

ANGIOGRAPHIC

* The target lesion is located within the native femoropopliteal artery until maximally 3 cm proximally of the knee joint.
* The target lesion has angiographic evidence of stenosis or restenosis \> 50% or occlusion which can be passed with standard guidewire manipulation
* The target lesion, visually estimated, has a minimal length of 15 cm and can be categorized as either a type C or D lesions according the TASC II guidelines
* Target vessel diameter visually estimated is \>4mm and \<6.5 mm
* There is angiographic evidence of at least one-vessel-runoff to the foot

Exclusion Criteria:

* Presence of another stent in the target vessel that was placed during a previous procedure
* Presence of an aortic thrombosis or significant common femoral ipsilateral stenosis
* Previous by-pass surgery in the same limb
* Patients for whom antiplatelet therapy, anticoagulants or thrombolytic drugs are contraindicated
* Patients who exhibit persistent acute intraluminal thrombus of the proposed lesion site
* Perforation at the angioplasty site evidenced by extravasation of contrast medium
* Patients with known hypersensitivity to nickel-titanium
* Patients with uncorrected bleeding disorders
* Aneurysm located at the level of the SFA
* Female patient with child bearing potential not taking adequate contraceptives or currently breastfeeding
* Life expectancy of less than twelve months
* Ipsilateral iliac treatment before the target lesion procedure with a residual stenosis \> 30% or ipsilateral iliac treatment conducted after the target lesion procedure
* Use of thrombectomy, artherectomy or laser devices during procedure
* Any planned surgical intervention/procedure within 30 days of the study procedure
* Any patient considered to be hemodynamically unstable at onset of procedure
* Patient is currently participating in another investigational drug or device study that has not completed the entire follow up period.

Primary outcomes:
measure: Primary patency defined as a target lesion without a hemodynamically significant stenosis on duplex ultrasound (systolic velocity ratio no greater than 2.4) and without TLR
timeFrame: 12 months
Secondary outcomes:
measure: Technical success, defined as the ability to cross and dilate the lesion to achieve residual angiographic stenosis no greater than 30% and residual stenosis less than 50% by duplex imaging.
timeFrame: procedure
measure: Primary patency defined as a target lesion without a hemodynamically significant stenosis on duplex ultrasound (systolic velocity ratio no greater than 2.4) and without TLR
timeFrame: 6 months
measure: Clinical success at follow-up defined as an improvement of Rutherford classification of one class or more as compared to the pre-procedure
timeFrame: 6 & 12 months
measure: Stent fracture rate determined on x-ray (Mild - single strut fracture; Moderate - fracture of more than one strut but without complete separation; Severe - complete separation)
timeFrame: 12 months
measure: Serious adverse events
timeFrame: 12 months
Other outcomes:
Locations:
city: Bonheiden
country: Belgium
facility: Imelda Hospital
city: Dendermonde
country: Belgium
facility: AZ Sint-Blasius
Study officials:
affiliation: AZ Sint-Blasius, Dendermonde, Belgium
name: Marc Bosiers, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Bosiers M, Deloose K, Callaert J, Moreels N, Keirse K, Verbist J, Peeters P. Results of the Protege EverFlex 200-mm-long nitinol stent (ev3) in TASC C and D femoropopliteal lesions. J Vasc Surg. 2011 Oct;54(4):1042-50. doi: 10.1016/j.jvs.2011.03.272. Epub 2011 Jun 2.