FORE-SIGHT™ is a non-invasive tool to measure cerebral tissue oxygen saturation. Cerebral tissue oxygen saturation (SctO2) values are important to clinicians because cerebral hypoxia (lack of oxygen supply to brain tissue) is one of the leading causes of brain injuries that occur in many surgical and clinical situations. The FORE-SIGHT™ Cerebral Oximeter utilizes optically-based Near Infra-Red Spectroscopy (NIRS) technology to monitor absolute SctO2. It works by projecting harmless near infra-red light through the scalp and skull and into the brain via a disposable sensor on the patient's forehead. The device measures the light that is returned to detectors on the sensor and analyzes this information utilizing patented algorithms to determine absolute cerebral tissue oxygen saturation levels. The FORE-SIGHT™ is designed to monitor SctO2 in a continuous way, and provides clinicians an opportunity to intervene before damage to the brain occurs. The monitor is currently part of the standard monitoring for children undergoing cardiopulmonary bypass, in the operating theatre, and is often continued in the postoperative phase in the pediatric intensive care unit (PICU) of the university hospitals Leuven.