 However, several studies have demonstrated the inaccuracy of Arterial Pulsed Oxygen Saturation in frequent situations resuscitation shock, sepsis, dark skin type. Thus, it is necessary to objectify the benefits and limitations of pulse oximetry to optimize their use, especially in these situations of high risk, where a discrepancy between the values measured by the pulse oximetry and measurement of arterial blood saturation with oxygen gas can be detrimental. 