| 摘要 |
A system for delivering a stent having a ratchet mechanism includes a delivery catheter having a movable elastic sleeve. The elastic sleeve covers the ratchet mechanism of the stent and prevents the ratchet mechanism from contacting a guide catheter or the vascular wall, and facilitates retraction of the delivery catheter into a guide catheter. The sleeve is retracted in order to deploy the stent. One embodiment of the invention includes a guide catheter having a curved, flexible distal tip to facilitate delivery of the stent. Another embodiment of the invention includes a method of repositioning and deploying a stent having a ratchet mechanism within a blood vessel.
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