Catheter systems with a blocking mechanism and methods for bypassing an occlusion in a blood vessel

摘要

A catheter for use with a subintimal reentry guidewire includes a proximal portion having a proximal guidewire lumen and a proximal inflation lumen, a distal portion having a distal guidewire lumen and a distal inflation lumen, and an intermediate portion disposed between the proximal portion and the distal portion and having an intermediate inflation lumen in fluid communication with the proximal and distal inflation lumens. The intermediate portion is devoid of a guidewire lumen. A blocking mechanism disposed in the distal portion of the catheter is transformable from a non-blocking configuration in which a guidewire is free to translate through the distal guidewire lumen and a blocking configuration in which a guidewire disposed in the distal guidewire lumen is prevented from translating through the distal guidewire lumen.

主权项

1. A catheter for bypassing an occlusion via a subintimal approach, the catheter comprising:
a proximal portion including a proximal guidewire lumen and a proximal inflation lumen disposed adjacent to the proximal guidewire lumen, wherein the proximal inflation lumen is fixed relative to the proximal guidewire lumen; a distal portion including a distal guidewire lumen and a distal inflation lumen disposed adjacent the distal guidewire lumen; an intermediate portion disposed between the proximal portion and the distal portion, the intermediate portion including an intermediate inflation lumen in fluid communication with the proximal inflation lumen and the distal inflation lumen, the intermediate portion being devoid of a guidewire lumen; and a blocking mechanism disposed in the distal portion of the catheter, the blocking mechanism being transformable between a non-blocking configuration in which a guidewire is free to translate through the distal guidewire lumen and a blocking configuration in which a guidewire disposed in the distal guidewire lumen is prevented from translating through the distal guidewire lumen, wherein the blocking mechanism being transformable from the non-blocking configuration to the blocking configuration by a fluid being introduced into the distal inflation lumen.