Subintimal reentry system

摘要

A subintimal recanalization catheter system for recanalizing a blood vessel. The system includes a support catheter and a balloon catheter configured to extend through the support catheter. The support catheter includes a tubular portion and an extension segment extending distal of the distal opening of the tubular portion. The balloon catheter, having a balloon secured to a distal portion thereof, is positionable through the tubular portion of the support catheter to position the balloon alongside the extension segment. The system is configured to be advanced into a subintimal space between a first tissue layer and a second tissue layer of a blood vessel wall where the balloon may be inflated against the extension segment to cause a distal portion of the catheter shaft of the balloon catheter to deflect toward the vessel lumen within the subintimal space to facilitate reentry into the vessel lumen.

主权项

1. A subintimal recanalization catheter system for recanalizing a blood vessel having an occlusion in a lumen thereof, the catheter system comprising:
an elongate shaft including a tubular portion having a lumen extending therethrough to a distal opening and an extension segment extending distal of the distal opening; and a balloon catheter having a balloon secured to a distal portion of a catheter shaft, the balloon catheter extendable through the lumen of the elongate shaft to position the balloon of the balloon catheter distal of the distal opening; wherein the catheter system is configured to be advanced into a subintimal space between a first tissue layer and a second tissue layer of a wall of the blood vessel; and wherein the balloon is configured to be inflated against the extension segment to cause the distal portion of the catheter shaft to deflect toward the lumen of the blood vessel within the subintimal space to facilitate reentry into the lumen of the blood vessel.