The Petal dedicated bifurcation stent

Abstract

Description of the Petal dedicated bifurcation drug-eluting stent The Taxus Petal (Boston Scientific Corporation, Natick, MA, USA) dedicated bifurcation device is a paclitaxel-eluting, side-branch access stent delivered over two coronary guidewires, enabling maintenance of side-branch access throughout the procedure. The body of the stent is deployed by inflation of a standard cylindrical balloon, and the side-branch “petal” struts are expanded by inflation of a smaller elliptical balloon (Figure 1). The balloon lumens (main and side-branch) are connected, permitting simultaneous balloon inflation using a single inflation device (Figure 1). The petal strut elements (Figure 1) project approximately 2 mm into the side branch providing mechanical support and applying anti-proliferative drug to the side-branch ostium, a common site for restenosis after bifurcation stenting procedures. When the Petal is delivered to a bifurcation lesion, separation of markers confirms rotational alignment of the SB elements with the SB (Figures 1 and 2). The Boston Scientific Petal stent is an improved version of a bare metal Petal stent made by Advanced Stent Technologies. The current laser cut design uses a novel, more radio-opaque platinum chromium alloy that is associated with greater visibility than stainless steel or cobalt chromium (Figure 3). The alloy is also stronger, allowing construction of stents with thinner struts but with maintained radial strength and minimal recoil. The drug (paclitaxel) and polymer (translute) are the same as those coating the Taxus Express and Taxus Liberte stents and evaluated in clinical trials. The stent/ delivery system profile allows delivery through a 7 Fr guide catheter.