Fast dive ascending sickness (Dysbarism)

[RejZoR]

I wasn't sure whether I should post it here or in general nonsense, but I guess it's a tech so here it is...

I was just watching a documentary about dive inventions (pressured air tanks) and they talked about dysbarism and how it is caused by nitrogen pretty much bubbling up inside your blood veins, causing damage to the body.

This made me wonder, if nitrogen is the biggest offender here, would creating a diving air mixture that is identical to our atmosphere, but with nitrogen removed. Would this mean you could ascend without experiencing decompression sickness (at least the one caused by nitrogen) or at least do it a lot faster (due to other decompression issues)?

How is with the divers who use different air mixtures or even more exotic ones like oxygen and helium mixture for extreme depth dives?

 

[qubit]

I don't think there's any way to avoid compression sickness or it would be an established process, since compressing and decompressing a person takes a great many hours.

 

[RejZoR]

Pressure effects, yes. But the nitrogen part could be resolved by removing nitrogen from the mixture, wouldn't it?

 

[Drone]

Oxygen is toxic at sufficient pressure (10 m depth). Nobody can use pure oxygen at 30 m and deeper.
Nitrogen and all breathable gases have narcotic effect. Only neon and helium are kinda ok. That's why any decent diver uses heliox only which is expensive.

 

[FordGT90Concept]

Earth's atmosphere is like 85% nitrogen. Deep sea divers breath pure oxygen for an extended period of time prior to a dive to purge nitrogen from their blood system prior to diving. The blend of oxygen they use under pressure determines how long they can safely stay at specific depths.

Humans can't dive very deep because our lungs are just begging to be crushed by water pressure. Record dive depths are attained with holding an exhaled breath to maximize the amount of pressure the chest cavity can take. They resurface rapidly using an air bag. The lungs are a very delicate instrument...


If you want to do some reading on this...
http://www.alertdiver.com/oxygen_toxicity