What is the primary purpose of a pulse oximeter?

The primary purpose of a pulse oximeter is to measure oxygen saturation in the blood. This non-invasive device utilizes light wavelengths to determine how much oxygen is being carried by hemoglobin in the red blood cells. By doing this, it provides crucial information about a patient's respiratory function and the efficiency of oxygen transport throughout the body.

Monitoring oxygen saturation is vital in numerous clinical scenarios, particularly in settings where patients may experience compromised respiratory function, such as during dental procedures involving sedation. Having accurate readings can help healthcare professionals make informed decisions regarding a patient’s anesthesia and airway management.

In contrast, blood glucose levels are monitored using devices like glucometers, blood pressure is assessed through sphygmomanometers or automated blood pressure monitors, and core body temperature is evaluated with thermometers. Each of these other options serves distinct physiological parameters, which are not the primary function of a pulse oximeter.