CA2234725A1 — Infusion coil apparatus and method for delivering fluid-based agents intravascularly

USPTO Abstract

This invention is an infusion coil apparatus and method for delivering fluid based diagnostic and therapeutic agents intravascularly in which an infusion coil (10) is placed in an artery or other vessel at a diseased location, and then fluid based agents are delivered through the infusion coil to that specific location. The infusion coil apparatus includes a resilient fiber core (12) enclosed in a soft, hollow polymer tubing (15). The resilient fiber core has a pre-shaped coil at one end that overcomes the susceptibility of the infusion coil to become uncoiled while permitting a construction of the infusion coil having a very small diameter. The polymer tubing is radiopaque and has a soft surface for engaging the inside of a vessel. The infusion coil is deployed by a deployment device (17) at a specific site in a vessel to be treated. Once at the delivery site, the deployment device ejects the infusion coil out of a delivery sheath into the vessel. The infusion coil is perforated (16) so that fluid based agents can be delivered through the infusion coil to the site adjacent the wall of the vessel. Variations in the shape of the coil and in the deployment devices are disclosed.