What factors affect pulse oxymmetry levels?

Pulse oximeter is a non -invasive method for measuring the amount of oxygenated hemoglobin in the blood. The clip-on probe emits the infrared light from one edge of the clip over the ear or toe to the sensor that reads the results at the other end. This information is then transferred back to a small computer component of the oxyter that shows the level of oxygen saturation in percent. Pulse oxymmetry levels can be affected by poor location of the probe, improper interpretations of pulse oximeters, physiological factors and any condition or diseases that would reduce the body's ability to oxygenate red blood cell hemoglobin (RBC). Pulse oxymmetry levels must never be accepted as valid in the presence of clinical symptoms indicating hypoxia or low oxygenation such as cyanosis or rapid breathing. The oximeter spacecraft is often unable to achieve a reading sensor due to a dark Polish nail or tissue. The light and sensor of the oxymeter clip should be directly apart with reasonably vascularizoBetting the tissue between them. Very bright environmental light, such as the light used in the operating room (OR) or recovery rooms, can disrupt the ability of the oximeter sensor to read its own light. The use of a sensor on the limb of the patient with known peripheral artery disease, hypothermia or Reynauda's disease will not reflect the oxygenation of the core of the body.

errors in pulse oxymmetry levels may result from incorrect interpretation of the oxemeter probe values. The probe is unable to distinguish between different types of hemoglobin, which are the result of hemoglobin binding to substances other than oxygen. In situations such as carbon monoxide poisoning, the presence of carboxyhemoglobin will lead to values ​​above the actual saturation rate. Similarly, the probe consistently misch metmaglobin when methyne blue is used as treatment and returns a temporary and wrong 85 % saturation rate. Pulse oxymmetry levels also do not provide any information aboutCarbon dioxide levels (CO _{2 ) in the blood, and therefore no warning against respiratory failure secondary to what 2 retention.}

Pulse oximetry levels and oxygen saturation rate are also affected by temporary physiological conditions such as recovery of general anesthesia or sleep apnea episodes. The disease that reduces the ability of oxygenation of the body will also reduce the level of pulse oximetry. This oxygen saturation barrier may be the result of inability to move oxygen to the lungs, for example in chronic obstructive pulmonary disease (COPD) or asthmatic attack. Insufficient oxygen saturation levels may also occur at the cellular level if there is insufficient hemoglobin in the bloodstream to bind oxygen, such as low blood or anemia.