Abstract
Purpose
To identify the risk factors associated with patency loss after bailout stenting with third-generation hybrid heparin-bonded nitinol stent of the femoropopliteal segment.
Methods
Prospective, multicenter, single-arm registry including 156 patients (50 females, mean age 72 ± 11 years) subjected, from February 2017 to December 2018, to provisional stenting with Gore Tigris vascular stent of the distal superficial femoral artery, with or without involvement of the popliteal artery, in 9 different centers. The 194 lesions, with Rutherford score ≥ 3, were stented in case of recoil, dissection or residual stenosis not responding to percutaneous trans-luminal angioplasty (PTA). The follow-up (FU) was performed with clinical evaluation and duplex ultrasound (DUS) at 1, 6 and 12 months.
Results
The primary patency rate was 99(95%CI 98–100)% at 1 month, 86(80–92)% at 6 months and 81(74–88)% at-12 months. After patency loss, 13/23 (56.5%) patients were re-treated, yielding a primary assisted patency of 91(86–96)% at 6 months and 88(82–94)% at 12 months and a secondary patency of 94(90–98)% at 6 months and 90(84–95)% at 12 months. Rutherford score ≥ 4 (p = 0.03) and previous severe treatments (p = 0.01) were identified as risk factors for early patency loss during FU. The involvement of the popliteal artery was not an independent risk factor for loss of patency.
Conclusions
The bailout stenting of the femoropopliteal segment with third-generation nitinol stents is a safe and effective option in case of recoil, dissection or residual stenosis not responding to PTA. Critical limb ischemia and history of previous major treatment at the same level are significant prognostic factors for patency loss during FU.
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Availability of data and material
The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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The study was approved by the local Ethics Committee of all participating centers (protocol number of the site principal investigator: 0038779). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Ruffino, M.A., Fronda, M., Bergamasco, L. et al. Prognostic risk factors for loss of patency after femoropopliteal bailout stenting with dual-component stent: results from the TIGRIS Italian Multicenter Registry. Radiol med 126, 1129–1137 (2021). https://doi.org/10.1007/s11547-021-01373-5
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DOI: https://doi.org/10.1007/s11547-021-01373-5