Cook Medical has announced the Evolution® Colonic Controlled-Release Stent, a stent designed to palliate uncomfortable symptoms associated with colonic obstructions caused by malignant neoplasms and relieve large-bowel obstructions prior to colectomy procedures. The product’s design offers physicians the control and maneuverability required to deliver a stent that conforms to the natural curves of the anatomy. Feautures of the product include enhanced expansion and better wall apposition and a unique delivery system that employs Kink-resistant Flexor® technology for pushability and stability.