CESA Training

[Blackcrusader]

That’s exceptional, does it come natural to you? people who dive all their lives seem to have an exceptional oxygen transfer rate, do you know of any studies done on it.

That is how all my dives are it's my natural breathing rate when diving. I just seem to be an oddball for a 135kg 300 pound diver. As I wrote in another thread I turned 60 last year and went to see a heart lung specialist. He had me go up 8 flights of stairs then put me right into a blood pressure machine. My heart rate was 58 beats per minute and my blood pressure 118 / 76 if I recall correctly. Doc then goes on about my weight... lol No signs of diabetes or heart disease or problems with lungs. A bent spine though lol.

Either when others film me or I listen to breathing in my own videos I breath every 20 - 25 seconds or so on some dives if not moving around. If you are not moving you really don't need to breathe too much. It's why airlines drop the O2 down to 16% on flights as no one is running around.

Also I am diving in water from 24c to 29c most of the time and I don't wear a wet suit as I have natural insulation lol. if 20c to 24c I probably put on my shark skin long armed top but still wear shorts.

 

[JXT71]

The necessary training for this was all covered in OW. For anyone that actually has had to do a CESA and believes that repeated prac-app training of it is important, I would question that conclusion over a reassessment of their pre-dive checks or diving habits. Cover your bases to prevent being in a CESA situation in the first place.

 

[scubaozy]

Correct me please, if i am wrong.. But
At high pressure the ppO2 increases.
So for example.if you got 10% oxygen, which is not enough at the surface.
You got a ppo2 of 0.2 at 10m.

But the amoung of oxygen in your blood should be the same, if ppo2 is over/arround 0.2
As far as i know, that's the maximum amount of o2 that can be used by our bodys.

More ppo2 will not cause more o2 to disolve Into the blood.

Could it be that you overlooked the hyperbaric oxygen therapy?

 

[mmerriman]

It's why airlines drop the O2 down to 16% on flights as no one is running around.

that's not exactly correct. the cabin is pressurized to 8000 ft. the effective O2 at that elevation is 16%.

 

[Angelo Farina]

that's not exactly correct. the cabin is pressurized to 8000 ft. the effective O2 at that elevation is 16%.

Sorry, but in the cockpit of the aircraft the oxygen PERCENTAGE is still 21%.
Being the cabine pressure reduced, the ppO2 will be 0.21 times the total pressure, hence it will be lower than at sea level. Please do not confuse percentages with partial pressures, the first are in %, the second ones are in Pa (or bars, if you prefer).
When the total pressure changes (going down underwater or up to the sky), usually the percentages of the gasses constituting the mixture do not change.

 

[boulderjohn]

Correct me please, if i am wrong.. But
At high pressure the ppO2 increases.
So for example.if you got 10% oxygen, which is not enough at the surface.
You got a ppo2 of 0.2 at 10m.

But the amoung of oxygen in your blood should be the same, if ppo2 is over/arround 0.2
As far as i know, that's the maximum amount of o2 that can be used by our bodys.

More ppo2 will not cause more o2 to disolve Into the blood.

On the surface, oxygen attaches to hemoglobin for transport through the blood. At greater pressures, some oxygen will also become dissolved in the plasma.

 

[mmerriman]

Sorry, but in the cockpit of the aircraft the oxygen PERCENTAGE is still 21%.
Being the cabine pressure reduced, the ppO2 will be 0.21 times the total pressure, hence it will be lower than at sea level. Please do not confuse percentages with partial pressures, the first are in %, the second ones are in Pa (or bars, if you prefer).
When the total pressure changes (going down underwater or up to the sky), usually the percentages of the gasses constituting the mixture do not change.

agree with you 100% and was not trying to suggest otherwise. the comment I was replying to indicated that the airline "drops the oxygen to 16%" it doesn't

 

[J-Vo]

and this: Tribolube 71 O2 Compatible Lubricant. But this is really OT.

The only place this says the word "silicone" is a warning not to buy knock offs as they may contain silicone and be dangerous.

Since this is in the entry level forum, DO NOT USE SILICONE PRODUCTS ON HIGH OXYGEN MIXES. This can be vary dangerous.

 

[J-Vo]

This looks like oxygen-compatible silicon grease: Oxygen compatible silicon grease for scuba regulators - DIVEAVENUE

Although the name says "silicon", I see no reference to what this actually contains, and I would not take the chance on my regulators.

Since this is in the entry level forum, DO NOT USE SILICONE PRODUCTS ON HIGH OXYGEN MIXES. This can be vary dangerous.

 

[Blackcrusader]

that's not exactly correct. the cabin is pressurized to 8000 ft. the effective O2 at that elevation is 16%.

Good thing is we don't need 16% or 21% so can rebreathe air to survive in an emergency If we are on nitrox 32% even better