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.
An iridium ring is a piece of jewelry that is made out of the precious metal iridium and worn around the finger. Iridium is one of the platinum metals. It's rare and expensive because it's the most corrosion-resistant metal on the planet and is far harder to melt than gold.