APPARATUS AND MEHTODS FOR REMOVING OBSTRUCTIVE MATERIAL FROM BODY LUMENS

摘要

An apparatus is provided for removing material within a body lumen that includes a catheter including a proximal end, a distal end for introduction into a body lumen, and an aspiration lumen extending therebetween; a guide member extending from the distal end and terminating in a distal tip, the guide member comprising a track adjacent a track lumen extending from the distal tip into the aspiration lumen; and an obstruction clearing device deployable from the guide member and retractable along the track. In addition or alternatively, the apparatus includes a cutting head reciprocable within the aspiration lumen adjacent the distal end for macerating material being aspirated into the aspiration lumen.

主权项

1. An apparatus for removing material within a body lumen, comprising:
an elongate tubular member including a proximal end, a distal end sized for introduction into a body lumen, and an aspiration lumen extending between the proximal and distal ends; a guide member extending from the distal end and terminating in a distal tip, the guide member comprising a track adjacent a track lumen extending from the distal tip into the aspiration lumen; and an obstruction clearing device comprising a core wire slidable within the track lumen and one or more lumen clearing elements deployable from the distal tip of the guide member when the core wire is advanced relative to the guide member, the lumen clearing elements comprising an expandable structure that is expanded from a contracted condition within the guide member to an expanded condition when deployed from the guide member for engaging material within a body lumen, the expandable structure directable proximally along the track in the expanded condition when the core wire is subsequently retracted relative to the guide member for drawing the one or more lumen clearing elements and any captured material into the aspiration lumen of the tubular member.