Patent ID: 9056025
Filing Date: 2015-06-16
Classification: A61F,A61L,Y10T

Abstract:
1. A stent delivery catheter comprising: an inflatable balloon having a central cylindrical section, a distal portion having a distal conical section and a distal cylindrical shaft and a proximal portion having a proximal conical section and a proximal cylindrical shaft; a drug eluting stent coaxially mounted over the central cylindrical section of the inflatable balloon, the drug eluting stent having a proximal end and a distal end; an inner tube having a central guide wire lumen designed to be advanced over a guide wire, the inner tube being attached near its distal end to the distal cylindrical shaft of the inflatable balloon; an outer tube that is fixedly attached at or near its distal end to the proximal cylindrical shaft of the inflatable balloon; a distal stent retention band having a generally conical shape and mounted onto the distal portion of the inflatable balloon, the distal stent retention band having its smallest diameter just proximal to the distal end of the inner tube and having its largest diameter at its proximal end, the proximal end of the distal stent retention band separated in a distal direction from the distal end of the drug eluting stent by a separation distance between 0.1 and 2 mm when the inflatable balloon is in an uninflated state; and a proximal stent retention band mounted coaxially over the proximal portion of the balloon, the proximal stent retention band having its distal end separated in a proximal direction from the proximal end of the drug eluting stent by a separation distance between 0.1 mm and 2 mm when the inflatable balloon is in the uninflated state; wherein the drug eluting stent is coaxially mounted over the central cylindrical section of the inflatable balloon between the proximal end of the distal stent retention band and the distal end of the proximal stent retention band, the drug eluting stent being crimped onto the inflatable balloon with a moderate crimping force that is such that after manufacturing is completed, a final outside diameter of the portion of the balloon that is under the stent struts is less than a 2.0 mil decrease from the balloon outside diameter just before the drug eluting stent is mounted.