Medical catheter for hypothermic treatment, treatment system with such a catheter, and production method

A treatment system comprising:

• a medical catheter for hypothermic treatment;
• the medical catheter comprising:
• a catheter tube comprising
• a proximal catheter portion and a distal catheter portion,
• a first outside diameter in the distal catheter portion and a second outside diameter in the proximal catheter portion, the first outside diameter being smaller than the second outside diameter,
• a through-lumen, and
• at least two temperature-regulating lumens;
• a heat-exchanger element disposed in the distal catheter portion and being in fluid communication with the at least two temperature-regulating lumens;
• and
• a temperature-regulating circuit comprising a heat-exchanger element and the at least two temperature-regulating lumens;
• and
• a self-expandable device joined to an elongated guide element, the self-expandable device being longitudinally displaceable together with the guide element in the through-lumen.

A method for making a medical catheter,

• the medical catheter for hypothermic treatment;
• the medical catheter comprising:
• a catheter tube comprising
• a proximal catheter portion and a distal catheter portion,
• a first outside diameter in the distal catheter portion and a second outside diameter in the proximal catheter portion, the first outside diameter being smatter than the second outside diameter,
• a through-lumen, and
• least two temperature-regulating lumens;
• a heat-exchanger element disposed in the distal catheter portion and being in fluid communication with the at least two temperature-regulating lumens;
• and
• a temperature-regulating circuit comprising a heat-exchanger element and the at least two temperature-regulating lumens;
• the method comprising the step of:
• forming the catheter tube in one piece from a single material or from several different materials by an extrusion process.