Is PaO2 the same as oxygen saturation?

Is PaO2 the same as oxygen saturation?

PaO2 values are always much lower than oxygen saturation values. This is simply a reflection of the oxygen saturation curve (figure above). For example, a saturation of 88% correlates to a PaO2 of ~55mm. We’re generally comfortable with a saturation of 88%, but a PaO2 of 55mm may cause concern.

What causes inaccurate oxygen saturation 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 factors can affect oxygen saturation?

Factors Affecting Pulse Oximeter Readings

• Blood pressure generally needs to be >80 SBP.
• Vascular impingement from any cause.
• AV fistula can decrease distal flow.
• Elevation with respect to the heart.
• Compression by the probe.
• Cardiac arrest (don’t use during arrest)
• Heart Rate extremes <30 or >200. Cold.

What is the relationship between pO2 and SO2?

It is important to understand the difference between the pO2, the oxygen saturation (often called SO2 or SaO2), the oxygen content and the oxygen delivery rate. The pO2 represents the partial pressure of oxygen or the gas tension.

What is the difference between pO2 and pCO2?

pO2: This is measured by a pO2 electrode. It is the partial pressure (tension) of oxygen in a gas phase in equilibrium with blood. pCO2: This is measured using a pCO2 electrode. It is the partial pressure of pCO2 in a gas phase in equilibrium with the blood.

What is the difference between SO2 and pO2?

How do you calculate PaO2 SpO2?

Example: Suppose a patient on 40% oxygen has a pulse oximetry SpO2 of 95%. Referring to the Table above, SpO2 of 95% is equal to a pO2 of 80mmHg. The P/F ratio = 80 divided by 0.40 = 200. The patient may be stable receiving 40% oxygen, but still has severe acute respiratory failure.

What is the difference between PaO2 and SaO2?

PAO2 is the pressure exerted by O2 on the arterial wall. SAO2 is the percentage of hemoglobin binding sites that are occupied with O2. This is the main difference between PAO2 and SAO2.

What is the normal oxygen level for someone with COPD?

Normal: A normal ABG oxygen level for healthy lungs falls between 80 and 100 millimeters of mercury (mm Hg). If a pulse ox measured your blood oxygen level, a normal reading is typically between 95 and 100 percent. However, in COPD or other lung diseases, these ranges may not apply.

What does O2 saturation mean?

In aquatic environments, oxygen saturation is a ratio of the concentration of dissolved oxygen (O2) in the water to the maximum amount of oxygen that will dissolve in the water at that temperature and pressure under stable equilibrium.

Why would PO2 be high?

PO2 (Partial Pressure of Oxygen) reflects the amount of oxygen gas dissolved in the blood. It primarily measures the effectiveness of the lungs in pulling oxygen into the blood stream from the atmosphere. Elevated pO2 levels are associated with: Increased oxygen levels in the inhaled air.