What is a pulse?

A pulse is a rhythmic throbbing or beating, typically referring to the rhythmic expansion and contraction of an artery as blood is pumped through it by the heart. The pulse can be felt at various points on the body, such as the wrist, neck, or temple, and is commonly used to measure the heart rate.

When the heart contracts, it pumps blood out to the body through the arteries. As the blood flows through the arteries, it creates a wave-like motion that can be felt as a pulse. The pulse rate corresponds to the number of heartbeats per minute and can vary depending on factors such as age, physical activity, and emotional state.

A pulse oximeter is a medical device that measures the pulse rate and oxygen saturation levels in the blood. It works by shining light through a fingertip or earlobe and measuring the amount of light absorbed by the blood. Pulse oximeters are commonly used in hospitals, clinics, and other healthcare settings to monitor a person's vital signs.