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.
A member of the platinum group metals, iridium is white, resembling platinum, but with a slight yellowish cast. Because of its hardness, brittleness, and very high melting point, solid iridium is difficult to machine, form, or work, thus powder metallurgy is commonly employed, instead.he discovery of iridium is intertwined with that of platinum and the other metals of the platinum group. Native platinum used by ancient Ethiopians and by South American cultures always contained a small amount of the other platinum group metals, including iridium.