SYSTEM FOR BYPASSING VASCULAR OCCLUSION HAVING PUNCTURING MECHANISM AND METHOD

摘要

A system for bypassing a vascular occlusion includes a catheter, and a puncturing mechanism within the catheter having a sleeve and a puncture wire positioned within the sleeve. The puncture wire is elastically deformable between an access configuration, and a deployed configuration. The puncture wire has a shape memory bias and is retracted within the sleeve and held by the sleeve in opposition to the bias in the access configuration.

主权项

1. A system for bypassing a vascular occlusion in a patient comprising:
a catheter including an elongate catheter body having formed therein a longitudinally extending wire guide lumen and a longitudinally extending second lumen; a puncturing mechanism including a sleeve slidable within the second lumen, and a puncture wire positioned within the sleeve and including a proximal segment defining a longitudinal axis and a distal segment having a piercing tip; the puncture wire being elastically deformable between an access configuration where the distal segment is straightened and the piercing tip is positioned closer to the longitudinal axis, and a deployed configuration where the distal segment is curved and the piercing tip is positioned further from the longitudinal axis; and the puncture wire further having a shape memory bias and being at a retracted position where the sleeve holds the puncture wire in opposition to the shape memory bias in the access configuration, and being slidable to an advanced position where the distal segment projects out of the sleeve and the shape memory bias positions the puncture wire in the deployed configuration.