What is the relationship between SpO2 and PaO2?

What is the relationship between SpO2 and PaO2?

SpO2 correlated well with arterial pO2 as predicted by the standard oxygen-hemoglobin dissociation curve in a undifferentiated critically ill patient population. In this study, a SpO2 >90% correlated with an arterial pO2 >60 mmHg more than 94% of the time.

Which is more important SaO2 or PaO2?

PaO2 is the most important (but not the only) determinant of SaO2. Other determinants of SaO2 for a given PaO2 are conditions that shift the position of the oxygen dissociation curve left or right, such as temperature, pH, PaCO2 and level of 2,3-DPG in the blood.

What causes inaccurate SpO2 readings?

Be aware that multiple factors can affect the accuracy of a pulse oximeter reading, such as poor circulation, skin pigmentation, skin thickness, skin temperature, current tobacco use, and use of fingernail polish.

What happens when PaO2 is low?

If a PaO2 level is lower than 80 mmHg, it means that a person is not getting enough oxygen . A low PaO2 level can point to an underlying health condition, such as: emphysema. chronic obstructive pulmonary disease, or COPD.

Is SaO2 or SpO2 more accurate?

The normal amount of SpO2 in healthy individuals is 97% to 99% [8]. If the SaO2 is 70% to 100%, the amount of SpO2 has high accuracy and is 2% different from the SaO2 amount obtained from ABG analysis [5]….

ABG Arterial Blood Gases
Sao2 Saturation of Oxygen (arterial blood)
Spo2 Spot Oxygen Saturation

What should PaO2 be on 100 oxygen?

approximately 100 mm Hg
For example, at sea level with no additional supplemental oxygen and a normal physiological state, the PO2 inside the alveoli calculates at approximately 100 mm Hg. But, if a patient is given 100% oxygen in the same situation the PO2 can be as high as 663 mm Hg.

Are SaO2 and SpO2 the same thing?

The mean difference between SpO2 and SaO2 was -0.02% and standard deviation of the differences was 2.1%. From one sample to another, the fluctuations in SpO2 to arterial saturation difference indicated that SaO2 could not be reliably predicted from SpO2 after a single ABG.