Patent ID: 8870819

Claim:
An apparatus for delivery of thermal treatment to a selected area in the vascular system of a patient, comprising: a catheter assembly; at least two heat transfer elements on a distal portion of the catheter assembly and configured to be inserted to the selected area in the vascular system; a supply lumen communicating with the heat transfer elements to supply a heat exchange fluid to the heat transfer elements; a return lumen in the catheter assembly and communicating with the heat transfer elements to receive the heat exchange fluid from the heat transfer elements; at least one exit port in the distal portion of the catheter assembly; and a through lumen within the catheter assembly extending to the distal portion of the catheter assembly to establish communication through the assembly from the distal portion of said catheter assembly, the exit port being in communication with the through lumen to establish a path for communication from outside the assembly, through the exit port, and into the through lumen.