Side port catheter device and method for accessing side branch occlusions

摘要

A medical device and method are provided for accessing a side branch in an artery. The device includes a catheter having a sidewall, an internal lumen, and a side port formed through the sidewall. A perforating guide wire has a proximal portion within the internal lumen and a distal portion arranged to be movable out of the side port. The guide wire can be delivered through the side port to a side branch artery when the catheter is deployed to a location with the side port aligned with the side branch artery. In another embodiment, the catheter has inner and outer telescoping tubes with offset exit ports formed therein. The telescoping tubes can be used to change the degree of deflection of the perforating guide wire by changing the relative positions of the offset exit ports.

主权项

1. A method of accessing a side branch artery having an occlusion, comprising the steps of:
providing a catheter having a sidewall and an internal lumen, a side port formed through said sidewall, and a perforating guide wire positioned within said internal lumen; deploying said catheter to a location with the side port aligned with the side branch artery to be accessed before inserting the guide wire into the side branch artery; and moving a distal portion of said guide wire through said side port and into the side branch artery to perforate the occlusion after said side port is aligned with said side branch artery; wherein said catheter further comprises an insertion lumen, and further comprising the step of guiding the catheter within a patient's body over a second guide wire that passes through said insertion lumen, said insertion lumen comprising open distal and proximal ends and being arranged so that said side port of the catheter is located between said distal and proximal ends.