Patent ID: 9061126
Filing Date: 2015-06-23
Classification: A61F,A61M,Y10T

Abstract:
1. A balloon angioplasty catheter having a distal end designed to deliver a stent into a blood vessel of a human subject, the catheter including: an inflatable balloon having a central cylindrical portion, a distal portion having a distal conical portion and a distal cylindrical shaft, and a proximal portion having a proximal conical portion and a proximal cylindrical shaft, the distal cylindrical shaft being attached proximal to the distal end of the angioplasty catheter; a balloon expandable stent mounted coaxially onto the central cylindrical portion of the balloon, the stent having a proximal end and a distal end; an outer tube having a distal end fixedly attached to the proximal shaft of the inflatable balloon; 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; a distal balloon control band having a generally conical shape and mounted coaxially over the distal portion of the inflatable balloon, the distal balloon control band extending in a distal direction beyond the distal shaft of the inflatable balloon, the distal balloon control band having a proximal end located near a proximal end of the distal conical section of the balloon when the catheter is in a pre-deployment state, the distal balloon control band having its smallest diameter just proximal the distal end of the inner tube and having its largest diameter at the proximal end of the distal balloon control band, the proximal end of the distal balloon control band separated in the distal direction from the distal end of the stent by a separation distance between 0.1 mm and 2.0 mm when the inflatable balloon is in an uninflated state; a proximal balloon control band mounted coaxially over the proximal portion of the balloon, the proximal balloon control band extending in a proximal direction beyond the proximal shaft of the balloon, the proximal balloon control band having a distal end located near a distal end of the proximal conical section of the balloon when the catheter is in a pre-deployment state; a core wire extending through the inflatable balloon; a distal marker band coaxially mounted over a distal portion of the core wire; a proximal marker band mounted coaxially over one of a proximal portion or an intermediate portion of the core wire; and a protective tubular member disposed coaxially over the distal marker band and the proximal marker band, the protective tubular member configured to prevent an inner surface of the balloon from contacting outer radial surfaces of the distal and proximal marker bands.