From the 40th annual conference of the International Society on Oxygen Transport to Tissue (ISOTT), held in Bruges, Belgium in August 2012, this volume covers aspects of clinical applications, muscle oxygenation, cancer, measurement technologies, oxygen transport modelling and Near-Infrared Spectroscopy (NIRS), cell metabolism and brain oxygenation.  Each topic was presented by  one or two invited speakers, and a series of contributed talks.