Heat transfer catheters and methods of making and using same

Abstract

Heat transfer catheter apparatus and methods of making and using same are disclosed wherein a fluid connection is provided between the distal portions of two adjacent, thin-walled, high strength fluid lumens to define a closed loop fluid circulation system capable of controlled delivery of thermal energy to or withdrawal of thermal energy from remote internal body locations.

1 - 73 . (canceled)  
     
     
         74 . A heat transfer catheter apparatus, comprising: 
 (a) a substantially elongate shaft;    (b) at least one first lumen internal to said substantially elongate shaft, said at least one internal lumen configured: 
 (i) to circulate a working fluid;  
 (ii) to inflate under pressure of said working fluid; and  
 (iii) to collapse under vacuum; and  
   (c) a second lumen external and adjacent to said substantially elongate shaft, said second lumen having a spiral shape;    wherein said second lumen is configured to extract said circulating working fluid.    
     
     
         75 . The catheter apparatus according to  claim 74 , wherein said first and second lumens are formed of a flexible material.