Drug eluting stent and a guide catheter device assembly for implanting the same

摘要

The present invention relates to a drug eluting stent for delivering therapeutic agents to a body lumen. The stent includes an expandable substrate configured for implantation in a vessel of a human body and a therapeutic agent composition coated over the stent. The balloon catheter shaft has a resilient unit that helps to transmit a force to the distal end, thereby helping to cross lesions.

主权项

1. A guide catheter device for angioplasty, comprising:
a guide catheter having a proximal end, a distal end, and lumen extending therethrough; a balloon catheter placed inside the guide catheter, the balloon catheter having a proximal end, a distal end, a guide wire lumen and a balloon lumen; a fluid inflatable balloon connected to the distal end of the balloon lumen; a guide wire extending through the guide wire lumen of the balloon catheter; and a drug eluting stent mounted over the balloon in order to place the same at a desired location in the artery; wherein, the balloon catheter comprises at least one resilient unit provided at a predetermined distance from the proximal end of the balloon catheter, and is configured to absorb and transmit a required force to maintain the alignment of the guide catheter and the balloon catheter, the at least one resilient unit comprises a spring in a circular shape, spiral shape, helical shape, or a combination thereof; and edges of the stent have a higher concentration of drugs as compared to a middle segment of the stent.