Ion irradiation is routinely used to implant impurities atoms into materials, especially semiconductors, to modify their properties. This process, usually known as ion implantation, is an important step in the manufacture of silicon integrated circuits.
Pulse oximetry is a procedure used to measure the oxygen level (or oxygen saturation) in the blood. It is considered to be a noninvasive, painless, general indicator of oxygen delivery to the peripheral tissues (such as the finger, earlobe, or nose).
The probe uses light to measure how much oxygen is in the blood. This information helps the health care provider decide if a person needs extra oxygen. Pulse oximetry may be used to see if there is enough oxygen in the blood. This information is needed in many kinds of situations.