Hypoxia. So you think you can bail?

divetheworld · 17th August 2008, 12:15

Just watched Jeremy Clarksons "Speed" on telly. He did a high altitude simulation of hypoxia and was asked to carry out tasks.
I did a search to post the video but couldnt find one, but did find some similar.
What I find worthy of post, is the inability of the subjects to put their oxygen mask on and over confidence in theor ability. Pause for thought?.....

CLICK HERE FIRST -> Hypoxia Portillo experiment, click here and choose the first video on the list.

jkaterenchuk · 17th August 2008, 12:35

Nice video. Thanks for sharing it. I could not help thinking that some of the people giving him instruction might also be suffering from Hypoxia as a result of too many marbles in their mouths.

John

cubixy2k · 18th August 2008, 14:40

Wow that's pretty worrisome. We think having a bail out, or even a BOV would help in the event of a problem, but he didn't even know there was a problem, and couldn't even respond to directions when told to replace his reg...

More of a reason to keep your eye on the cell monitors.

divetheworld · 18th August 2008, 16:09

Quote: (Originally Posted by cubixy2k)

Wow that's pretty worrisome. We think having a bail out, or even a BOV would help in the event of a problem, but he didn't even know there was a problem, and couldn't even respond to directions when told to replace his reg...

More of a reason to keep your eye on the cell monitors.

And yet only 280 people have read this thread to date.

I think this should be essential watching, over confidence in the ability to bail in a hypoxic situation shouldnt be encouraged.

Skipbreather · 18th August 2008, 16:15

For 20 years I was required to go to the altitude chamber every 3 years in order to, among other things, get reacquainted w/ my personal hypoxia symptoms. For those not familiar, they can change w/ most people over time. One of my most vivid memories is watching one guy in our group-who volunteered to be the Guinea pig- remove his O2 mask @ chamber equivalent of 35,000 ft altitude, maybe a ppO2 of 0.05 ~ 0.07. His instructions were to replace his mask as soon as he felt his symptoms. He got his mask about half way to his face and froze with eyes wide open. The lights were on but there was definitely nobody home. The chamber attendant had to replace his mask. Made me a true and complete believer in how quickly I could be disabled by hypoxia w/ little to no warning. ‘Nuff said.

**PhilSiswick** · 18th August 2008, 16:21

Quote: (Originally Posted by Skipbreather)

For 20 years I was required to go to the altitude chamber every 3 years in order to, among other things, get reacquainted w/ my personal hypoxia symptoms. For those not familiar, they can change w/ most people over time. One of my most vivid memories is watching one guy in our group-who volunteered to be the Guinea pig- remove his O2 mask @ chamber equivalent of 35,000 ft altitude, maybe a ppO2 of 0.05 ~ 0.07. His instructions were to replace his mask as soon as he felt his symptoms. He got his mask about half way to his face and froze with eyes wide open. The lights were on but there was definitely nobody home. The chamber attendant had to replace his mask. Made me a true and complete believer in how quickly I could be disabled by hypoxia w/ little to no warning. ‘Nuff said.

One trip in the chamber, at the age of 18, nailed that lesson home to me (which was the point, of course :-). I assume that, like most things, with advancing years my performance under hypoxic conditions has reduced from the frighteningly low base I demonstrated then, so it's a failure that frightens me even more than hyperoxia or CO2 issues.

The point is - hyperoxia might kill you, a CO2 breakthrough might kill you, hypoxia WILL kill you.

Cheers,

MGC · 18th August 2008, 17:09

It certainly was very interesting and very very scary atthe same time, the guy just had no idea he was impaired at all

**kybrt** · 18th August 2008, 17:59

for those who have personal experience with this drill, what did you perceive?

i wonder if those who are impaired know it or what? do they blank out or do they think they are saving themselves while just sitting there?

the guy in the video keeps saying 4 of clubs, did he know he was picking up new cards? or was he just 'stuck'?

netmage · 18th August 2008, 18:36

So,... the thing that strikes me about hypoxia is that you should - and I emphasize - should - have plenty of warning....

Assuming no massive loss of bouyancy control, It takes quite some time to breathe down from a operational setpoint of say 1.0 or 1.2 to a hypoxic level... this is one of those areas where I believe prevention is far more capable than reaction...

I'm a relative n00b at this., so I'll have to defer to those of you w/ more hours under your belt... can you share the chains of events where you found yourself responding to the risk of hyperoxia, how close to the thresholds did you get before recognizing and rectifying the situation...

**fireman** · 18th August 2008, 19:16

Unless you knowingly or unknowingly (failed to analyse a bad mix) have grossly hypoxic dil and perhaps an ADV mishap...IMHO BOV's are for hypercapia.

17th August 2008, 12:15	#1 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,636	Hypoxia. So you think you can bail? Just watched Jeremy Clarksons "Speed" on telly. He did a high altitude simulation of hypoxia and was asked to carry out tasks. I did a search to post the video but couldnt find one, but did find some similar. What I find worthy of post, is the inability of the subjects to put their oxygen mask on and over confidence in theor ability. Pause for thought?..... CLICK HERE FIRST -> Hypoxia Portillo experiment, click here and choose the first video on the list. __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe Last edited by divetheworld : 18th August 2008 at 16:15.
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17th August 2008, 12:35	#2 (permalink)
jkaterenchuk . Current Rebreather/s: Inspiration Classic Megalodon Classic Kiss Other Rebreather/s: Join Date: May 2006 Location: Lititz, PA Posts: 1,088	Re: Hypoxia. So you think you can bail? Nice video. Thanks for sharing it. I could not help thinking that some of the people giving him instruction might also be suffering from Hypoxia as a result of too many marbles in their mouths. John
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18th August 2008, 14:40	#3 (permalink)
cubixy2k RBW Member Current Rebreather/s: Evolution Other Rebreather/s: Evolution Join Date: Dec 2007 Location: Philly Posts: 62	Re: Hypoxia. So you think you can bail? Wow that's pretty worrisome. We think having a bail out, or even a BOV would help in the event of a problem, but he didn't even know there was a problem, and couldn't even respond to directions when told to replace his reg... More of a reason to keep your eye on the cell monitors. __________________ -AJ Pirate Technical Chief Mate Director of Plundering Operations Booty Investment Analyst & Pillaging Opportunity Specialist
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18th August 2008, 16:09	#4 (permalink)
divetheworld Dive porn pimp Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Classic Kiss Other CCR Join Date: Mar 2005 Location: Leeds, England Posts: 1,636	Re: Hypoxia. So you think you can bail? Quote: (Originally Posted by cubixy2k) Wow that's pretty worrisome. We think having a bail out, or even a BOV would help in the event of a problem, but he didn't even know there was a problem, and couldn't even respond to directions when told to replace his reg... More of a reason to keep your eye on the cell monitors. And yet only 280 people have read this thread to date. I think this should be essential watching, over confidence in the ability to bail in a hypoxic situation shouldnt be encouraged. __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. *WWW.NARKEDAT90.CO.UK* *http://www.grpservices.com/pursuit/* Supporting Shearwater Research Products in Europe
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18th August 2008, 16:15	#5 (permalink)
Skipbreather Reads the fine print Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet MK 15.X Home Build Join Date: Mar 2005 Location: Chicago, Illinois, USA Posts: 584	Re: Hypoxia. So you think you can bail? For 20 years I was required to go to the altitude chamber every 3 years in order to, among other things, get reacquainted w/ my personal hypoxia symptoms. For those not familiar, they can change w/ most people over time. One of my most vivid memories is watching one guy in our group-who volunteered to be the Guinea pig- remove his O2 mask @ chamber equivalent of 35,000 ft altitude, maybe a ppO2 of 0.05 ~ 0.07. His instructions were to replace his mask as soon as he felt his symptoms. He got his mask about half way to his face and froze with eyes wide open. The lights were on but there was definitely nobody home. The chamber attendant had to replace his mask. Made me a true and complete believer in how quickly I could be disabled by hypoxia w/ little to no warning. ‘Nuff said. __________________ "Entropy RULES! Enjoy the interim."
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18th August 2008, 16:21	#6 (permalink)
PhilSiswick Phil Siswick, Tango Current Rebreather/s: Evolution Other Rebreather/s: Inspiration Vision Join Date: Apr 2006 Location: Oxford, UK Posts: 1,095	Re: Hypoxia. So you think you can bail? Quote: (Originally Posted by Skipbreather) For 20 years I was required to go to the altitude chamber every 3 years in order to, among other things, get reacquainted w/ my personal hypoxia symptoms. For those not familiar, they can change w/ most people over time. One of my most vivid memories is watching one guy in our group-who volunteered to be the Guinea pig- remove his O2 mask @ chamber equivalent of 35,000 ft altitude, maybe a ppO2 of 0.05 ~ 0.07. His instructions were to replace his mask as soon as he felt his symptoms. He got his mask about half way to his face and froze with eyes wide open. The lights were on but there was definitely nobody home. The chamber attendant had to replace his mask. Made me a true and complete believer in how quickly I could be disabled by hypoxia w/ little to no warning. ‘Nuff said. One trip in the chamber, at the age of 18, nailed that lesson home to me (which was the point, of course :-). I assume that, like most things, with advancing years my performance under hypoxic conditions has reduced from the frighteningly low base I demonstrated then, so it's a failure that frightens me even more than hyperoxia or CO2 issues. The point is - hyperoxia might kill you, a CO2 breakthrough might kill you, hypoxia WILL kill you. Cheers, __________________ Phil (WSKD 0001) I have always felt that the dive I am on is not nearly important as the dives I plan to be on the rest of my life. Tom Rose, 2007 The person who gets the farthest is generally the one who is willing to do and dare. The sure thing boat never gets far from shore. Charles A. Lindbergh www.hugsac.org.uk
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18th August 2008, 17:09	#7 (permalink)
MGC RBW Member Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Nov 2007 Location: Nr Whitby Posts: 30	Re: Hypoxia. So you think you can bail? It certainly was very interesting and very very scary atthe same time, the guy just had no idea he was impaired at all __________________ Life is way tooo short
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18th August 2008, 17:59	#8 (permalink)
kybrt too legit to quit Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Jan 2007 Location: Neuw Yawk Posts: 386	Re: Hypoxia. So you think you can bail? for those who have personal experience with this drill, what did you perceive? i wonder if those who are impaired know it or what? do they blank out or do they think they are saving themselves while just sitting there? the guy in the video keeps saying 4 of clubs, did he know he was picking up new cards? or was he just 'stuck'? __________________ Marv Fidelis Ad Mortem www.diveboatkaren.com
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18th August 2008, 18:36	#9 (permalink)
netmage Tim Owens Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Dec 2005 Location: Coconut Creek, FL Posts: 701	Re: Hypoxia. So you think you can bail? So,... the thing that strikes me about hypoxia is that you should - and I emphasize - should - have plenty of warning.... Assuming no massive loss of bouyancy control, It takes quite some time to breathe down from a operational setpoint of say 1.0 or 1.2 to a hypoxic level... this is one of those areas where I believe prevention is far more capable than reaction... I'm a relative n00b at this., so I'll have to defer to those of you w/ more hours under your belt... can you share the chains of events where you found yourself responding to the risk of hyperoxia, how close to the thresholds did you get before recognizing and rectifying the situation...
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18th August 2008, 19:16	#10 (permalink)
fireman rEvo combat swimmer Current Rebreather/s: rEvo Other CCR Other Rebreather/s: rEvo Other CCR Join Date: Nov 2006 Location: chicago Posts: 549	Re: Hypoxia. So you think you can bail? Unless you knowingly or unknowingly (failed to analyse a bad mix) have grossly hypoxic dil and perhaps an ADV mishap...IMHO BOV's are for hypercapia. __________________ Heres to you Capt. Bill Never Forget, and stay safe everyone.
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