In oxygen therapy, what is the role of a pulse oximeter?

A pulse oximeter plays a crucial role in oxygen therapy by assessing blood oxygen saturation. This non-invasive device measures the percentage of hemoglobin in the blood that is saturated with oxygen, which is vital for determining whether a patient is receiving adequate oxygen levels. By providing real-time data on blood oxygen levels, healthcare providers can make informed decisions regarding the need for additional oxygen therapy or adjustments in treatment. This information is particularly important for patients with respiratory issues, as it helps to ensure they are maintaining an appropriate level of oxygen for effective physiological function.

The other options do not accurately describe the function of a pulse oximeter. Delivering oxygen directly to the lungs is a role of oxygen delivery systems, not the pulse oximeter. While a pulse oximeter can sometimes provide heart rate readings incidentally, its primary purpose is not to measure heart rate. Additionally, regulating the pressure of oxygen is typically the responsibility of specific oxygen delivery equipment rather than the pulse oximeter itself.