Oxygen saturation

Definition

Oxygen saturation (SpO2) is a measure of the percentage of hemoglobin binding sites in the bloodstream occupied by oxygen. It is a critical parameter in assessing a patient's respiratory function and overall oxygenation status.

5 Must Know Facts For Your Next Test

1. Normal oxygen saturation levels range from 95% to 100%.
2. Low SpO2 levels can indicate hypoxemia, which necessitates immediate medical intervention.
3. Pulse oximeters are commonly used devices to non-invasively measure SpO2 levels.
4. In cardiac emergencies, maintaining adequate oxygen saturation is crucial for preventing organ damage.
5. Certain drugs like vasopressors and inotropes used in cardiac emergencies may influence oxygen delivery and utilization.

Review Questions

• What is the normal range for oxygen saturation levels in adults?
• Why is it important to monitor SpO2 levels during a cardiac emergency?
• Which device is commonly used to measure oxygen saturation non-invasively?

Related terms

Hypoxemia: A condition characterized by an abnormally low level of oxygen in the blood.

Pulse Oximeter: A device that measures oxygen saturation (SpO2) non-invasively using light absorption through a pulsating arterial bed.

Vasopressors: Medications that constrict blood vessels and increase blood pressure, often used in emergency settings to improve tissue perfusion.