Growth of Lower Extremity Angioplasty with Drug-Coated Balloons

The rationale for the development of drug-coated angioplasty balloons (DCBs) derives mainly from the limitations of drug-eluting stents (DES). Nonstent-based localized drug delivery using a DCB maintains the antiproliferative properties of a DES, but without the immunogenic and hemodynamic drawbacks of a permanently implanted endovascular device. Moreover, DCBs may be used in subsets of lesions where DES cannot be delivered or where DES do not perform well. Examples include torturous vessels, small vessels or long diffuse calcified lesions, which can result in stent fracture; when scaffolding obstructs major side branches; or in bifurcated lesions.

Additional potential advantages of DCBs include:

  • homogenous drug transfer to the entire vessel wall;
  • rapid release of high concentrations of drug sustained in vessel wall no longer than a week, with little impact on long-term healing;
  • absence of polymer, which reduces the risk of chronic inflammation and late thrombosis;
  • absence of a stent, preserving the artery’s original anatomy, very important in bifurcations or small vessels to diminish abnormal flow patterns; and
  • avoided need for lengthy antiplatelet therapy.

Currently, paclitaxel is primarily used by DCB manufacturers. Its high lipophilic property allows for passive absorption through the cell membrane and sustained effect within the treated vessel wall.

Below we illustrate the rise of drug-coated balloons for peripheral angioplasty procedures in lower extremities.

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Source: Report #C500.

 

The usage of peripheral DCB in clinical practices can be expected to experience explosive growth in superficial femoral artery and femoro-popliteal below-the-knee indications to over half a million procedures annually by the year 2022. Anticipated rapid adoption of peripheral DCB technologies in the U.S. and major Asia-Pacific States (especially in China and India accounting for 95% of the covered region’s population) should work as a primary locomotive of growth of projected global procedural expansion.
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Source: Report #C500.