This study investigated the accuracy, drift, and clinical usefulness of a new optical transcutaneous oxygen tension (tcPO 2 ) measuring technique, combined with a conventional electrochemical transcutaneous carbon dioxide (tcPCO 2 ) measurement and reflectance pulse oximetry in the novel transcutaneous OxiVenT™ Sensor. In vitro gas studies were performed to measure accuracy and drift of tcPO 2 and tcPCO 2 . Clinical usefulness...