1 Dizziness, lightheadedness, or fainting. 2  A pulse oximeter is a device that measures the amount of oxygen in your blood.  Blood tests may be done to measure blood gases, such as oxygen, acids, and carbon dioxide. Blood tests may also be used to find the cause of your hypoxia.
Iridium(noun) a rare metallic element, of the same group as platinum, which it much resembles, being silver-white, but harder, and brittle, and indifferent to most corrosive agents. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.5.
Iridium is the most resistant to oxidation of all metals. It can be used is as a hardening agent in alloys with Platinum and Osmium. Sometimes used in medical therapies e.g. treating prostate cancer by radiation therapy. Used for crucibles, special containers and other apparatus resistant to intense heat.