A guidable catheter for heating or cooling fluid in a feeding vessel in a vasculature of a patient includes a heat transfer element having exterior surface irregularities to create turbulence in a surrounding fluid. A supply catheter delivers a working fluid to an interior of the heat transfer element,...http://www.google.com.au/patents/US8163000?utm_source=gb-gplus-sharePatent US8163000 - Selective organ cooling catheter with guidewire apparatus and temperature-monitoring device
