Oxygen mask may come to need in different situations. In emergency situations on airplanes, up on very high mountains, in accidents that distort respiratory system and in case of Asthma.
Oxygen
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%
Typically a person using Oxygen will use it with a mask or with a cannula. A typical Concentrator will produce between .5 LPM (liters per minute) and 10 LPM. Your body should be OK if you had the Cannula or mask on you because the Boy only pulls Oxygen out of the air. Other elements (Nitrogen, co2, Xenon, Krypton, etc.) are not used by the body and are exhaled. If you breathed in Pure Oxygen you would exhale some Pure Oxygen and co2. My source: http://vitalitymedical.wordpress.com/2008/08/04/5-oxygen-concentrator-tips/ burtcandoit@gmail.com
Oxygen can be administered by nasal cannula, mask, and tent.
That's used to giving the person more oxygen. It doesn't need a particular type of care as such - but the environment should be kept fire safe in view of increased oxygen levels.
Not only would you need an oxygen mask (There is no oxygen on Venus) but you would also need a pressure suit (Venus is 93 bar compared to Earths 1) and some form of internal cooling system (as the temperature of Venus is about 460oC)
Oxygen
Yes, you have to.
How to use the oxygen mask on potty racers 3.4
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.
Most climbers put an oxygen mask on well before reaching the summit of Mount Everest. They breathe extra oxygen because of the altitude of the mountain it is very thin air at that height which makes it very hard to breathe.
Depending on the severity of the poisoning, 100% oxygen may be given with a tight fitting mask as soon as it is available.
The first oxygen mask was invented by a gentleman by the name of Lewis Haslett in 1847. The device protected the lungs and was actually more like a gas mask at that time.
I don't know if he ever does, but I don't think that Justin Bieber wears a mask in publicity situations.
Clothes oxygen mask
The main advantage of the Venturi mask is?