A catheter system and method are provided which change the temperature of a fluid, such as blood, by heat transfer. Selective cooling or heating of an organ may be performed by changing the temperature of the blood feeding the organ. The catheter system includes an inlet lumen and an outlet lumen structured...http://www.google.co.uk/patents/US6695873?utm_source=gb-gplus-sharePatent US6695873 - Inflatable catheter for selective organ heating and cooling and method of using the same