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.
The reasons why compression-only CPR works is that there is still some oxygen left in your body to be used up, even without adding more. A healthy 70-kg adult's basal metabolic rate requires about 250ml of pure gaseous oxygen per minute. First, there is oxygen left in your lungs.