A video lesson. Excessive super saturation and gas seeds/micronuclei. Silent bubbles. Type I decompression sickness: pain only, skin and joints. Type II decompression sickness: dangerous pulmonary and cerebral symptoms.
Brilliant video. Thanks so much. I have a question tho, there seems to be a contradiction around 12:37. It first says that the third reason is that more Nitrogen than Oxigen can be disolved into the blood without saturation, and then it continues saying that twice as much OXIGEN can disolve without causing any problems. Is this contradictory or am I interpreting it incorrectly?
1:32 the pressure gradient of nitrogen is not the problem, otherwise you would get bent by switching to pure oxygen at the bottom. The problem is supersaturation, which is not the same thing as gradient.
Thanks. Now my question is it in normal place we r breathing as well nitrogen gas as in my home, outside the home etc what about high altitude place like Mt Everest?
Yes, it's in your home, out in the forest, etc. Air is about 79% nitrogen and 21% oxygen. (I say "about" because there is a small amount of other gases like argon, carbon dioxide, etc. in the air, too.) It's not altitude dependent; as you go higher, the density of all gases decreases, but the percentages stay the same.
It's too technical - you're gonna lose people because it's boring! Use diagrams and simple gas expansion theory... People lose interest when you start talking about platelets & PFOs .... I had a DCS Type 1 whilst working as a diving instructor in Thailand and it wasn't the end of the world - many instructors take a bend during CESAs etc and it is just a hazard of the job! Please stop this scare mongering - it has nothing to do with reality!!
Presenting facts is not "scare mongering," it's called "education." If learning about the causes of DCS scares you, you should stop diving and you certainly shouldn't be instructing. Your potential students deserve better.
@@JustinColman-kz5fl I'm not a diver, and I know this disease is uncommon in recreational divers, and in the rare cases where it happens its very mild. But if you're instructing people to dive deep, and there's a bigger risk involved, they should know how bad things can go if they dont follow the rules. Just so that they don't take things lightly.
