Gary Name Meaning & Origin. Gary. Origin of the name Gary: From the Old English Garwig (spear of battle), a compound name composed from the elements gar (a spear) and wig (battle). Alternatively, Gary developed as a pet form of any of the various names beginning with the Germanic element gar (spear). Var: Garry.
So if you require 3 liters per minute of oxygen, that amount of oxygen is delivered to you throughout one minute whether you take 20 breaths each minute or 10. Continuous flow oxygen concentrators deliver a set amount of oxygen per minute when set to the corresponding setting.
Quick Answer. Mayo Clinic defines the normal human oxygen level as 95 percent to 100 percent. Levels below 90 percent are considered low. Oxygen levels are usually measured with a pulse oximeter device attached to the finger; this device measures the amount of oxygen saturating the blood. Continue Reading.