pulzoximéter

A pulzoximéter, or pulse oximeter, is a non-invasive medical device used to measure a person's blood oxygen saturation level and pulse rate. It works by shining a beam of light through a translucent part of the body, such as a fingertip, earlobe, or toe. The device then measures the amount of light absorbed by the hemoglobin in the blood. Hemoglobin that is saturated with oxygen absorbs light differently than hemoglobin that is not. By analyzing these differences, the pulzoximéter can calculate the percentage of blood that is carrying oxygen, known as oxygen saturation (SpO2).

The device typically consists of a clamp-like device that is clipped onto the patient's body part. A small display on the device shows the SpO2 reading, usually expressed as a percentage, and the pulse rate, measured in beats per minute. Normal blood oxygen saturation levels typically range from 95% to 100%. Readings below this range can indicate hypoxemia, a condition where there is insufficient oxygen in the blood, which can be a sign of various medical issues.

Pulzoximeters are widely used in hospitals, clinics, and by individuals for home monitoring. They are particularly useful for patients with respiratory or cardiovascular conditions, during surgery, and in emergency situations. The device provides a quick and easy way to assess a patient's oxygenation status, aiding healthcare professionals in making informed treatment decisions. However, it is important to note that pulzoximeters are affected by factors such as nail polish, poor circulation, and ambient light, and should be interpreted in conjunction with other clinical signs and symptoms.