I'm in Australia and I'm going to get my diving certificate in a few days. This was really helpful to have this information. It is good to know that DCS is a risk but even more helpful to know biologically why it is a risk and how it is caused.
A VERY convoluted way of saying 'humans normally only get the Bends when they breathe compressed air while under water (SCUBA, etc.), whereas FREE DIVERS (like those who dive freely, to great depths for pearls) DON'T GET THE BENDS, because they take a breath and hold it, not breathing compressed air. JUST LIKE WHALES HOLD THEIR BREATH! Decompression sickness is a function of BREATHING COMPRESSED AIR (and, FYI, can happen on land, too! it's called 'altitude sickness then) - there, and it didn't take me 7 friggin minutes to explain it!
Thank you. But you haven't explained what "the bends" is... What's also got me baffled is why you're here watching other people's videos rather than demonstrating your glittering intellect by making your own... It's easy to criticise, much harder to "do". Maybe try to do latter for a change...
Wow why are you shouting. Actually- free divers can and do get the bends, if they do many dives and stay too short on surface. It’s a real hazard for freedive instructors. That’s why freedivers always should keep their surface to divetime ratio at minimum 2/1. So 2 minutes diving = 4 minutes on top. Decompression sickness is a function of amount of time spent underwater with nitrogen (in your lungs) being absorbed by the tissues, and speed of ascent. You are incorrect about “holding breath”. The video actually clearly explains that the deeper-going whales exhale, to prevent any nitrogen going from lung to tissue. Basically, if you have air in your lungs “either from SCUBA or simply holding your breath “ you can get the bends.
Here is a snippet from an article on the subject: “The mechanism whereby freedivers can develop decompression sickness (DCS) was studied by Dr. P. Paulev in Denmark. He studied the freedivers who accompanied trainees as they performed the free ascents required to qualify for naval submarine duty. Dr. Paulev described his findings in a Danish naval medical officer. He states, ‘The author has intimate knowledge of the event, because the medical officer happens to be himself.’ He performed about 60 dives to 100 feet with a two minute bottom time and surface intervals of one to two minutes. After about five hours of freediving, he noticed pain, paralysis of the legs, nausea, visual changes and weakness of the right arm. He was treated in an hyperbaric chamber and, following a full treatment table, all abnormalities disappeared.”
Visceral Slays I think because if you depressurize to below ambient water temperature, it'll be a lot harder to pull the air from the regulator as you breathe in since its under all that external pressure. That's just my best guess
The regulator the diver breaths from does reduce the pressure from the tank for the diver to breathe. The first stage (which is connected to the tank) takes the tank pressure down from, say 200 bar with a full tank to about 9 or 10 bar and then the second stage (the one in the mouth) reduces the pressure again so its the same as the surrounding ambient pressure. 2 bar at ten meters, 3 bar at 20 meters etc. The pressure of the gas in the lungs needs to be equal to the ambient pressure otherwise it would just compress. Hope that helps!
OmG s little view for such an important information when swimming in the ocean. Any ways, so this basically says machines are superior to us and whales when it comes to swimming in the ocean.
if I had a dollar for every pixel in this video, I'd have a nickel
To be fair, it's 13 years old
I'm in Australia and I'm going to get my diving certificate in a few days. This was really helpful to have this information. It is good to know that DCS is a risk but even more helpful to know biologically why it is a risk and how it is caused.
really good explanation, in-depth (heh) and easy to understand, thank you
this is a really great video! so informative and fun :)
One of the best videos I've seen
Great video and explanation of the bends (DCI) and it answered a question about whales that I've been pondering for a while. Cheers, Q.
Great explanation of the bends. Only error is it`s a recompression chamber which is used to treat DCI cases not a decompression chamber.
Loved the presentation and illustration....strong work indeed.
You explained it so well..Thank you
great explanation of the bends
The can of fizzy drink was a very good way to explain what happens and now I have a better understanding of what causes the bends, thank you 👍
A VERY convoluted way of saying 'humans normally only get the Bends when they breathe compressed air while under water (SCUBA, etc.), whereas FREE DIVERS (like those who dive freely, to great depths for pearls) DON'T GET THE BENDS, because they take a breath and hold it, not breathing compressed air. JUST LIKE WHALES HOLD THEIR BREATH! Decompression sickness is a function of BREATHING COMPRESSED AIR (and, FYI, can happen on land, too! it's called 'altitude sickness then) - there, and it didn't take me 7 friggin minutes to explain it!
Thank you. But you haven't explained what "the bends" is... What's also got me baffled is why you're here watching other people's videos rather than demonstrating your glittering intellect by making your own... It's easy to criticise, much harder to "do". Maybe try to do latter for a change...
Seriously thank you
I presumed that was why when i saw the thumbnail.
Wow why are you shouting. Actually- free divers can and do get the bends, if they do many dives and stay too short on surface. It’s a real hazard for freedive instructors. That’s why freedivers always should keep their surface to divetime ratio at minimum 2/1. So 2 minutes diving = 4 minutes on top.
Decompression sickness is a function of amount of time spent underwater with nitrogen (in your lungs) being absorbed by the tissues, and speed of ascent.
You are incorrect about “holding breath”. The video actually clearly explains that the deeper-going whales exhale, to prevent any nitrogen going from lung to tissue.
Basically, if you have air in your lungs “either from SCUBA or simply holding your breath “ you can get the bends.
Here is a snippet from an article on the subject:
“The mechanism whereby freedivers can develop decompression sickness (DCS) was studied by Dr. P. Paulev in Denmark. He studied the freedivers who accompanied trainees as they performed the free ascents required to qualify for naval submarine duty. Dr. Paulev described his findings in a Danish naval medical officer. He states, ‘The author has intimate knowledge of the event, because the medical officer happens to be himself.’ He performed about 60 dives to 100 feet with a two minute bottom time and surface intervals of one to two minutes. After about five hours of freediving, he noticed pain, paralysis of the legs, nausea, visual changes and weakness of the right arm. He was treated in an hyperbaric chamber and, following a full treatment table, all abnormalities disappeared.”
Can getting the Ben's cure any ailments?
The Bends: The second studio album by British alternative/art rock band Radiohead.
whats it called when one drinks alcohol before diving??(some kind of sickness)
do u mean nitrogen narcosis? (when u breath gas at pressure u might get the effect of if ur drunk but it quickly goes away if u ascend a little bit)
Very informative and easy to understand :-)
Well done presentation.
Thanks! Clear presentation, just what I like. :)
Bends are just part of (or symptom) of decompression sickness
Good job
pressure actually acts on the body in all directions, not just down...
Thank you very much! Clear explanation.
what is the bends?
a pretty fucking solid album
new fear unlocked: the bends.
I know this was 12 years ago, but if by any chance you still visit this account, does that mean you wouldn't get the bands if you use just pure oxygen
Oxygen is much more soluble than nitrogen; but if the de-pressurisation was too rapid, you'd still boil oxygen out of solution and cause an embolus.
Thank you, very helpful.
Why not just depressurize the air to a reasonable pressure (1ATM) before entering the regulator??
Visceral Slays I think because if you depressurize to below ambient water temperature, it'll be a lot harder to pull the air from the regulator as you breathe in since its under all that external pressure. That's just my best guess
The regulator the diver breaths from does reduce the pressure from the tank for the diver to breathe. The first stage (which is connected to the tank) takes the tank pressure down from, say 200 bar with a full tank to about 9 or 10 bar and then the second stage (the one in the mouth) reduces the pressure again so its the same as the surrounding ambient pressure. 2 bar at ten meters, 3 bar at 20 meters etc. The pressure of the gas in the lungs needs to be equal to the ambient pressure otherwise it would just compress. Hope that helps!
The outer pressure of the water on your lung cavity would prevent you in haling. Try taking a 3 foot snorkle and inhaling. Much more difficult.
Bend u get bend any time
Very interesting!
do you post sources for your info?
+bananian Answer is no. They don't need to post sources anyways.
Why does a whales body rip internally apart when under the pressure of it's own weight whilst beached....
I think that's from being dead for a while and bacteria causing large pockets of gas
Their bodies aren't built for the gravitational pressures exerted on them when out of the water
riplink
Is this a test?
Very Interesting
Nitrogen Narcosis has much the same effect as drinking alcohol. Drinking alcohol before diving is just plain stupid.
Human's always mess stuff up for other species 🙄
That was great.
Exactly.
Is anyone else here because of 47 meters down
Jeff is a bad diver
Awesome! =)
OmG s little view for such an important information when swimming in the ocean. Any ways, so this basically says machines are superior to us and whales when it comes to swimming in the ocean.
mmm carbonated blood
Interesting :)
cuz its air lol not high levels of nitrogen
Cole Corrigan you Are aware what "air" means right?
Very interesting!