Self-expandable stent with a constrictive coating and method of use

摘要

The present invention provides a system and method for providing a coating on a self-expandable medical device, such as a stent, while avoiding the issues relating to coating damage from the delivery sheath during loading and deployment. In one embodiment, the present invention includes a constrictive coating that acts as a constrictive sheath for the stent. A cutting mechanism is mounted on the end of the delivery tube such that when the stent with the constrictive coating exits the delivery tube, the constrictive coating is cut. This releases the constriction retaining the sheath, and the stent self-expands, pressing the cut portions of the coating against the lumen wall.

主权项

1. A system for deploying a self-expandable medical device with a coating, comprising:
a self-expandable medical device; a constrictive coating on an outer surface of the medical device, said constrictive coating preventing the self-expansion of the medical device, said coating adapted to be implanted in a body lumen along with the medical device; a delivery tube having an opening at a distal end of the tube, the self-expandable medical device and the constrictive coating housed inside the delivery tube; and at least one cutting mechanism mounted at the distal end of the delivery tube and adapted to longitudinally cut the constrictive coating as the medical device exits the delivery tube through the opening at the distal end of the delivery tube so that the longitudinally-cut coating permits self-expansion of the medical device.