Patent ID: 8551096
Filing Date: 2013-10-08
Classification: A61B

Abstract:
1. A system for the treatment of a target tissue by directionally delivering energy and/or bioactive material, the system comprising: an elongate catheter having a proximal end and a distal end with an axis therebetween, the catheter having a radially expandable balloon near the distal end and an energy delivery surface on the balloon; a thermally changeable coating having a releasable bioactive material and coupled to the balloon, the thermally changeable coating being oriented to be urged against the target tissue when the balloon expands; wherein the thermally changeable coating has a coating melting temperature greater than 37° C. so that the thermally changeable coating can undergo a phase change to release the bioactive material from the thermally changeable coating; and an energy source operatively coupled to the catheter to energize the energy delivery surface so as to heat at least a portion of the thermally changeable coating above the coating melting temperature to melt the portion of the thermally changeable coating and release the bioactive material to the target tissue.