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PaO2-- measure oxygen (O2) in blood. Normal range (80-100 mmHg)

SaO2-- measure as a percentage the amount of hemoglobin molecules which are oxgenated (oxyhemoglobin) in arterial blood. Normal range (>95%)

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14y ago
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14y ago

spo2 is hemoglobin saturation, pao2 is plasma saturation


Edit: SpO2 is the Saturation (peripheral) of Haemoglobin with Oxygen, expressed as a percentage ration compared to fully saturated Haemoglobin (Hb).
i.e. when the Haemoglobin (the main oxygen carrying component of blood, found in red blood cells) is fully loaded with oxygen, then is it 100% saturated. It is SpO2, because this is normally measured by placing a probe on the finger which shines red light of two different types through the finger, and a calculation is carried out based on how much of each type of light is absorbed, which tells us how much the Hb is loaded up or saturated.

PaO2 is the Partial pressure (arterial) of oxygen in the blood. That is, if you took the oxygen gas in all the blood, and put it into a box by itself, what pressure would it exert on the walls. This is normally measured by using a special probe which uses electric currents to determine how much oxygen is actually present in the blood. It is normally expressed in mmHg (millimetres of Mercury), or (more commonly outside the USA) as kPa (kilopascals), which are units of pressure. 1 atmosphere of pressure is roughly 101kPa, which is roughly 760 mmHg or 760 Torr, which is roughly 1 bar. There are more precise values available on the internet for these.

Whilst SpO2 and PaO2 are closely related, they do not actually measure the same thing.
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10y ago

PAo2 is alveolar pressure

Pao2 is arteriolar pressure

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Q: What is the difference between SpO2 and PaO2?
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What is the oxygen level of normal individuals?

Depends how it is measured, and whether oxygen therapy is being given. The two main methods for measuring oxygen in the blood are oxygen saturation (often referred to as sats, or SpO2) and from an arterial blood gas (PaO2)SpO2 on air should be >98%, it decreases when you have a cold, if you smoke etcPaO2 on air should be 12-14.5 kPaIf oxygen therapy is being given then these values should be higher


What is the formula for AA gradient?

PAO2 - PaO2 ****************************************** PAO2 is the Alveolar Air Equation: PAO2 = FiO2 (Pb- Ph20) - PACO2/R Notes: Pb = 760 mmHg Ph20 = 47 mmHg R = 0.8


If PAO2 is low and bicarb is low what is the problem?

If PAO2 is low...... Then PaO2 would be low........ Then low SaO2.....then low content CaO2..... Then low DO2.... Then Hypoxia.....lactic acidosis( anaerobic glycolysis), isn't it?


What is the normal range of PAO2 - PaO2 for healthy young adults breathing room air?

10 - 15 mm Hg.


What is importance of PaO2?

A PaO2 is the level of oxygen in your arterial blood. If it is too low, it can cause significant loss in brain function. It can also cause organ failure. If the PaO2 is low, it will cause shortness of breath and also confusion.


What is the normal value of PaO2?

Arterial values should be between 85 and 100 mmHg, Venous values should be between 30 and 40 mmHg.


What is the normal spo2 for children?

95


What is the difference between sp02 and sa02?

Both are measurements of the saturation of hemoglobin with oxygen in arterial blood.The difference is how the measurement is taken SpO2 is an indirect measurement using a finger probe, ear sensor or similar device. SaO2 is a direct measurement using a blood sample such as an arterial blood gas analysis.


What does low spo2 signify?

Decreasing spo2 signifies - decreased efficiency of lungs to absorb enough oxygen, required to have normal gaseous exchange.


What is a pleth wave?

waves form of the spo2


Is a 96 spo2 level good?

Yes


What are the normal ranges for PaO2 and PaCO2?

95-100