The catheter ( 10 , etc. ) includes a working fluid supply path through the source of the working fluid . The catheter also to return the working fluid to the source of the working fluid from the working fluid supply path , and a hydraulic fluid return path that leads the working fluid supply path . At least one working fluid supply path and the working fluid return path , the distal heat exchange region of the catheter contained in the ( 48 64 80 96 ) , a distal heat exchange region , the first helical path and a second the helical path ( 50, 52 66, 68 82, 84 98, 100 ) includes , and is made of a shape memory material . [ Selection Figure Figure 1カテーテル(10等)は、作動流体のソースと通じる作動流体供給経路を含む。カテーテルは、また、作動流体供給経路から作動流体のソースへ作動流体を戻すために、作動流体供給経路と通じる作動流体戻り経路を含む。作動流体供給経路及び作動流体戻り経路の少なくとも1つは、カテーテルの遠位熱交換領域(48;64;80;96)に含まれ、遠位熱交換領域は、第1の螺旋経路及び第2の螺旋経路(50,52;66,68;82,84;98,100)を含み、かつ形状記憶材料からなる。【選択図】図1
