Self-expanding nitinol peripheral stent
The peripheral iVolution Stent is a stent made out of a nickel/titanium alloy (nitinol). The stent is loaded into the delivery system that will release it at the site of implantation. The stent is self-expanding, achieving the diameter it has been designed for once it is released from the delivery device. From that moment on, it remains implanted in the artery, exerting a continuous force on the artery wall to stay open. The stent design is based on a plurality of undulating rings that extend axially without connection bridges forming an open-cell stent. The metal at the stent ends is less dense in artery coverage, and incorporates a series of radiopaque markers to visualize the stent once expanded. The stent is made from a nitinol tube that is cut using a laser technique and then expanded to the required final diameter. The surface is then polished to achieve a smooth, shiny finish. The stent delivery system is a coaxial catheter with triple sheath design, consisting of: A guide wire lumen, with the stent accommodated at the distal end. The distal part of this tube ends in an atraumatic tip that carries a radiopaque marker that defines the distal portion of the stent. A stent blocking tube which prevents the stent from moving back at the time of its release. The blocking tube has a distal marker which aligns with the proximal part of the stent, and indicates the position of the stent within the device. A retractable sheath that protects and contains the stent. When the sheath is pulled back, the stent is deployed. A fixed sheath partially covers the retractable sheath and protects it, so that if the user touches the catheter, doesn’t block the movement of the retractable sheath. For the release of the stent, it is necessary to operate the proximal handle of the delivery system. The handle has a locking mechanism that must be disabled to begin the release. The release may be performed slowly, by turning the screw; or it can be performed quickly, by pressing the button and pulling back. The handle is ergonomic and can be used with one hand. The system ends in a soft, atraumatic tip to avoid damaging the artery during its advance See IFU for further information. Available to download.