Pulse Oximetry

A non-invasive method of monitoring oxygen saturation in the blood, usually measured as a percentage. It is a vital tool in assessing respiratory and cardiovascular health.

 

Oxygen Saturation (SpO2)

The percentage of hemoglobin binding sites in the bloodstream occupied by oxygen. A normal range is between 95% and 100%.

 

Hemoglobin

The protein in red blood cells responsible for carrying oxygen from the lungs to the rest of the body.

 

Probe/Sensor

A small device typically attached to a fingertip, earlobe, or other body parts to measure oxygen levels. It uses light absorption to determine the amount of oxygen-bound hemoglobin.

 

Arterial Blood Gas (ABG)

A blood test that directly measures the levels of oxygen and carbon dioxide in the blood. Pulse oximetry is often used as a less invasive alternative to ABG.

 

Perfusion

The process of blood flow through the tissues and organs, ensuring oxygen is delivered to cells.

 

Desaturation

A decrease in oxygen saturation levels. It may indicate respiratory or circulatory issues.

 

Pulse Rate

The number of heartbeats per minute, usually measured simultaneously with pulse oximetry. Normal resting pulse rates vary by age but typically range from 60 to 100 beats per minute.

 

Capnography

A method of monitoring carbon dioxide levels in exhaled breath. Used in conjunction with pulse oximetry for a more comprehensive respiratory assessment.

 

Artifact

False readings caused by factors like motion, poor sensor placement, or ambient light. Regular calibration and proper positioning help minimize artifacts.