Want this question answered?
28%
10 - 15 liters per minute
Oxygen
Oxygen can be administered by nasal cannula, mask, and tent.
Your second question was: "can you overdose on oxygen wearing an oxygen mask?" The answer to that is no. Oxygen masks - as used by divers, fighter pilots and sometimes hospital patients - always offer a mix of oxygen and nitrogen so that oxygen poisoning cannot occur. However, if you were to put on a mask that makes you inhale only pure oxygen, it would after a little while start to poison your central nervous system. As to 'why your friend died': I have no idea.
28%
Using a non-rebreathing oxygen mask at under 10 lpm of oxygen flow can cause carbon dioxide to build up and be re-inhaled by the patient.
50%
A nonrebreather mask (NRB) should have an oxygen flow rate of at least 10 liters per minute in order to deliver the maximum oxygen concentration.
Can be used to administer continuous positive airway pressure or free-flow oxygen through the mask
An oxygen mask used with a reservoir bag is called a partial rebreather mask. It is designed to deliver high concentrations of oxygen by allowing the patient to rebreathe some of the exhaled air along with oxygen from the reservoir bag.
10 - 15 liters per minute
It depends on how much FiO2 you want to deliver and what the patient will tolerate. For most patients a nasal cannula will be sufficient at 1-6 L/M. The FiO2 will go up 4% with each liter of flow, so 1 L/M = 24%, 2 L/M = 28% up to 6 L/M = 44%. If you need more than that then you can try a venturi mask, which will give a precise FiO2 of 28-55%, or a non-rebreather which gives up to 95%. If you do use a simple mask, which I don't recommend because people don't seem to understand them, make sure the flow is at least 5-10 L/M. A simple mask will deliver about 35-50% FiO2. However, running a simple mask at less than 5 L/M will not provide enough flow of oxygen to clear the mask of CO2 so your patient will be rebreathing their CO2.
Oxygen
How to use the oxygen mask on potty racers 3.4
The administration of emergency oxygen is a medical procedure and thus not subject to OSHA. Emergency oxygen should be administered only by or under the direct supervision of a medical professional such as a physician, physician's assistant, or an adequately trained nurse. OSHA Guidelines do permit emergency Oxygen to be given from a tank marked so in Red letters and a flow device of not less than 6 lpm flow into a simple mask. Also, training certification must be acquired via a class such as an American Safety and Health Institute Emergency Oxygen Administration Course.
High flow oxygen using a non-rebreather mask has been found to be extremely helpful in cluster headache, however in Migraine it is only infrequently found to be helpful.