What are some cautions to keep in mind when using a pulse oximeter on a client?
When using a pulse oximeter on a client, the nurse should remember that (1) the pulse oximeter uses light wavelengths to measure oxyhemoglobin saturation, but the readings are not as accurate as the SaO2 of arterial blood gases; (2) pulse oximetry measures the delivery of oxygen to the cells, but not the actual amount of oxygen used by the client; (3) bright environmental lights may cause a higher reading than an actual one; (4) anemia and low blood pressure, blood ph, Pco2, and body temperature can affect oximeter readings; and (5) health professionals have over-relied on pulse oximeter readings and under-relied on observations, vital signs, and actual lab values to make decisions about clinical care.
