My friend’s mother is in a nursing home and recently had to start using oxygen. In her room is an oxygen compressor that runs on electricity. This has a long tube that eventully runs into her nose, and that’s the source of oxygen she uses while she’s in her room.
When she’s moving around the place – to the dining room, etc. – she has an oxygen tank that she moves around with her. Same arrangement with the tubes, but she’s mobile.
This may sound like a very dumb question, but – what does the compressor do? Does it actually manufacture oxygen? Or does it just contain oxygen and pump it out? If it just contains oxygen, how is that different in principle from just using an oxygen tank?
Tha compressor makes a noise, so I assume it must be doing something, but I just don’t know what. The tank, on the other hand, it totally silent, as you’d expect, it’s just oxygen under pressure with a valve on it.
A 5 liter/min machine is standard and costs about $1000. A 4 liter engine at 4000 RPM would take in about 8000 lpm of air, or 1600 liters O2, so it’d be adding about 5/1600 or increasing the O2 by 0.3%. Not enough to matter I suspect.
Are there any hazards from all the nitrogen being dumped into the air? My grandmother had one, and since it ran so hot, they kept it in a back (unused) bedroom. My understanding is that the room would become very nitrogen rich after not very long. Would that have posed any sort of risk?
5 lpm is about what two people doing moderate exercise would use up. I don’t have any room in my house so tightly sealed that I would worry that two people exercising in it would suffocate. And as Squink mentioned, if the O2 is getting depleted it would be a self-limiting process.
Other than the requirements of the device – what about someone hanging about in the room? How much nitrogen would be concentrated?
(I guess that’s a silly question because the room isn’t hermetically sealed… )
The concentrator produces “air” that is more oxygen-rich than room air, but less than a cylinder or liquid O2 system. Concentrators are good for nighttime and sitting around, but for more active patients, cylinders or liquid O2 systems are the way to go.
Reduce the oxygen concentration enough and sure, it will become an issue. Exactly when it does is hard to tell without knowing the infiltration rate of air from outside the room, how much circulation you have naturally in the house, etc. Some rooms might be much more dangerous than others.
You’re subtracting oxygen, true - but the percentage of nitrogen in the air remains the same. Remember, your lungs are taking in the oxygen from the air (whether directly or via the concentrator, it doesn’t matter) and replacing it with carbon dioxide. In the long term the air in the room would be 80% nitrogen and 20% carbon dioxide (except that you’d be dead long before the oxygen level reached zero, but never mind). The point is that the nitrogen levels are unchanged at 80%.
This is one of the funniest GQ threads I’ve ever come across. No one ever has been concerned about sleeping in an enclosed room. The little old lady and her machine are consuming no more oxygen per minute than when she was a young teenager without the benefit of the machine. Her lover should have no problem at all.
I see Alive has addressed the nitrogen concentration issue.