SENSORS, MONITORS AND BIOSENSORS FOR SURGICAL AND MEDICAL USE IN DETECTING AND MONITORING TISSUE ISCHAEMIA AND IN MONITORING AND ANALYZING A PATIENT'S VITAL FUNCTIONS; SURGICAL AND MEDICAL DEVICES FOR THE PURPOSE OF MONITORING AND ANALYZING A PATIENT'S VITAL FUNCTIONS; SURGICAL AND MEDICAL DEVICES FOR USE IN DETECTING AND MONITORING TISSUE ISCHAEMIA; SURGICAL AND MEDICAL DEVICES FOR USE IN BIOPSY PROCEDURES, NAMELY, BIOPSY GUNS, NEEDLES, HOLDERS AND INTRODUCERS