An oxygen level of 96 to 100% is regarded as normal. A value of 95%, is considered acceptable. A value of 93 to 94% is borderline and not regarded as normal, there may be need to seek a doctor’s advice if the oxygen level remains at this level. Any oxygen level less than 93% is bad and should seek immediate evaluation by the doctor. It’s an electronic device that clips onto a patient’s finger to measure heart rate and oxygen saturation in his or her red blood cells—the device is useful in assessing patients with lung disease. Pulse oximeters started to fly off store (and online) shelves when people learned that low oxygen saturation levels can be a sign of COVID-19. Situation #1: Your normal average oxygen level during sleep is usually above 95+, but lately, it has trended downward. A few things might be going on here. If you had a nightcap, it can show up in your readings. In one study, participants who had a nightcap 30 minutes before bed, experienced aggravated sleep apnea symptoms (3). This is called a pulse oximeter, and it is used to find out how much oxygen is attached to your blood cells by measuring how light interacts with your blood. It’s pretty cool medical science, and so easy! During sleep, 90% oxygen saturation is considered normal. When it dips below 90%, that’s considered abnormal and called hypoxemia (low A pulse ox is easy and fairly accurate when the oxygen level in the pneumonia patient is not too low. But it only gives you the saturation of oxygen carrying blood as a percentage, not the actual level of oxygen in the blood. Anything above 90% is acceptable, and higher than 95% is desirable, in pneumonia patients. Oxygen saturation determined by pulse oximetry will be normal and cannot be used to screen for carbon monoxide poisoning. Carboxyhemoglobin can be measured by co-oximetry. Treatment is the administration of 100% oxygen (which shortens the half-life of carboxyhemoglobin) and sometimes the use of a hyperbaric chamber. Carbon monoxide is a tasteless, odorless, colorless, and non-irritating gas formed with the combustion of hydrocarbons (fossil fuels). It binds to hemoglobin with a much greater affinity than oxygen to form carboxyhemoglobin, subsequently reducing oxygen-carrying capacity and oxygen utilization. Hypoxia ensues, and toxicity can lead to cerebrovascular ischemia and myocardial infarction. By Your “Normal” SpO 2 Range. According to the Mayo Clinic, normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered low, and indicate the need for supplemental oxygen. This condition is often referred to as hypoxemia, and its symptoms include severe shortness of breath, increased heart rate Oxygen saturation is generated during blood gas analysis by one of two methods: direct measurement by CO-oximetry; or calculated from measured p O 2. The calculation used to generate s O 2 from p O 2 (a) is based on the relationship between the two described by the oxygen dissociation curve. This mechanism is protective until tissues extract about 50%–60% of oxygen from the blood. Once oxygen extraction reaches this maximum, oxygen consumption is supply-dependent and lactic acidosis due to cellular hypoxia develops. SvO 2 can be used as an indirect indicator of cardiac output in the presence of constant SaO 2, VO 2, and Hgb. + + + 6YTha.