What is the purpose of pulse oximetry?

Pulse oximetry primarily serves the critical function of measuring the oxygen saturation levels in the blood. This is vital for assessing how effectively oxygen is being transported throughout the body. By using a non-invasive sensor typically placed on a fingertip or earlobe, pulse oximeters provide real-time data about the percentage of hemoglobin in the blood that is saturated with oxygen. This information is essential for medical professionals as it helps evaluate a patient’s respiratory and cardiovascular health, guiding decisions on interventions and treatments. Maintaining adequate oxygen saturation is crucial for patient safety, especially in emergency situations or during procedures that may compromise respiratory function.

While measuring blood pressure, assessing airway patency, and evaluating cardiac output are all important aspects of patient assessment, they are distinct procedures that do not directly relate to the specific role of pulse oximetry in monitoring oxygen levels.