A pulse oximeter is a medical and health device that is extremely useful in the field of vital sign health monitoring. An oximeter devices measures pulse rate and blood oxygen saturation with accuracy and ease. Blood oxygen saturation is also known as SpO2 and is the percentage of hemoglobin that is found in the blood. This figure is very important because in essence it represents the amount of oxygen that your body including your tissues are absorbing. For invidiuals that operate and function at very high altitudes like mountain climbers or even pilots it is of critical importance to monitor their blood oxygen saturation levels. The reason for this is the fact that oxygen is the most basic element to sustaining life. Without oxygen no human or tissue within the human body will be able to survive. As such there must at all times be sufficient amount of oxygen available to an individual at all times in order to ensure that they are functioning at healthy levels. When you are at high altitudes in the case of mountain climbers or even high altitudes in case of pilots you can run the risk of experiencing hypoxia. Hypoxia is condition where the body does not get enough oxygen and as such there can be some serious side effects to the body's health. Due to the fact that pilots operate at very high altitudes there is very little oxygen at those levels. It is very important for these pilots to use a pulse oximeter in order to constantly monitor their oxygen levels to determine whether they are getting enough oxygen.
What the pulse oximeter will tell the pilot is their SpO2 levels and based off that number and whether they are at healthy levels the pilot can determine if a situation exists whereby the pilot may need to resort to using supplemental oxygen in order to prevent hypoxia.