Measuring Oxygen Saturation

If the level is below 90 percent it is considered low and called hypoxemia.

Measuring oxygen saturation.

You can measure the blood s percentage of oxygen saturation using a pulse oximeter a clip like sensor device that is placed on a thin part of your body such as an earlobe or nose. Oxygen saturation is the fraction of oxygen saturated hemoglobin relative to total hemoglobin unsaturated saturated in the blood the human body requires and regulates a very precise and specific balance of oxygen in the blood. Oxygen saturation should always be above 95 percent. An estimate of your oxygen level can be easily measured with a pulse oximeter a non invasive device that attaches to the end of your finger a more accurate method of measuring oxygen levels is with an arterial blood gas abg study a blood test that is performed by taking a blood sample from an artery usually.

The pulse oximeter may be incorporated into a multiparameter patient monitor. Oxygen saturation is a term used to define how much oxygen your blood is carrying. A measurement of your blood oxygen is called your oxygen saturation level. See figure 4 1 for a pulse oximeter.

Oxygen saturation can be measured using a pulse oximetry device which is a non invasive method to measure arterial oxygen saturation level. A pulse oximeter is a medical device that indirectly monitors the oxygen saturation of a patient s blood as opposed to measuring oxygen saturation directly through a blood sample and changes in blood volume in the skin producing a photoplethysmogram that may be further processed into other measurements. Normal arterial blood oxygen saturation levels in humans are 95 100 percent.