A heat exchanger to remove heat from coolant in a closed circuit cooling catheter includes two heat exchange stages. Each stage includes a heat exchange element, such as a group of hollow fibers, and a TEC array juxtaposed with the heat exchange element to remove heat from the element. The elements are...http://www.google.co.uk/patents/US6019783?utm_source=gb-gplus-sharePatent US6019783 - Cooling system for therapeutic catheter
