Oxygen above 20,000 feet

Most people I know seldom go very high in their turbo airplanes -- 02
is just too big a hassle.
Try to buy it on Sunday. Many places require a mechanic to fill.

So, with you experts on board here, I want to investigate this cannula
business a bit.

Using a mountain high pulse system, with a rebreather cannula at 18,000
feet, I easily get measured
low 90s saturation and it is still using only brief pulses on each
inhalation.
BTW, this thing really saves O2 & you feel good.

So the simple question is: So long as I climb higher and still
maintain the measured 02 saturation,
what's the harm in using the cannula? Why not at 210?

What else don't we know?

Bill Hale

Montblack wrote:




What is the time limit - 3 minutes? Tell me it's not 4 minutes.

What are planes/jets doing (ft/min) in emergency descents - and how low
must they go to get to "breathable air?" What's the reg for breathable
air out of an emergency descent - 18,000 ft?


Montblack

I believe the reg states "4 minutes to get to 14000 ft."

Happy Flying!
Scott Skylane

Mike Rapoport wrote:
Most jets can do 10,000fpm+. It is going to take a couple of minutes in any
case, that is why it is required for either one pilot to be wearing a mask
or to have quick donning masks immediatly available.


It's pretty impressive. Many years ago I was meandering over eastern
AZ at 12.5K ft. when a TWA DC-9 variant lost cabin pressure overhead
(we were on the same Center freq.). That guy was down to my altitude
in just a few minutes. The deck angle of his decent looked downright
scary.

John Galban=====N4BQ (PA28-180)

wrote in message
oups.com...
Most people I know seldom go very high in their turbo airplanes -- 02
is just too big a hassle.
Try to buy it on Sunday. Many places require a mechanic to fill.

http://www.avweb.com/news/columns/182079-1.html

-------------------------------------------------------------------------
January 24, 1999

Pelican's Perch #13:
Getting High on Welder's Oxygen

Having problems finding Aviator's Breathing Oxygen to refill your bottle?
Upset about the rip-off prices some FBOs charge for an O2 fill? Don't put up
with it, says AVweb's John Deakin, who explains why it's perfectly safe -
and perfectly legal - to use cheap welder's oxygen, and tells you exactly
what you need to know to buy it in bulk and do your own refills

---------------------------------------------------

I have the MH 4ip pulse system, and it makes filling my own hardly worth the
effort. In going any direction from here, it's pretty assured I will need to
go to 15,000 or 16,000 feet or more. I live at nearly 6000 feet and don't
smoke cigarettes.
I have masks, but only use them three or fiur times a year.


So, with you experts on board here, I want to investigate this cannula
business a bit.

Using a mountain high pulse system, with a rebreather cannula at 18,000
feet, I easily get measured
low 90s saturation and it is still using only brief pulses on each
inhalation.
BTW, this thing really saves O2 & you feel good.

Yes, thhey are a good deal in eliminating waste and also in automatically
adjusting for altitude and night/day.

So the simple question is: So long as I climb higher and still
maintain the measured 02 saturation,
what's the harm in using the cannula? Why not at 210?

Have you tested this theory of yours? As someone pointed out, you'll lose
more oxygen outside the cannula the higher you go.

What else don't we know?

A persons physiology and other health considerations. Would a sea level
resident who is in poor shape and smokes need a mask at a much lower
altitude than someone else?


--
Matt
---------------------
Matthew W. Barrow
Site-Fill Homes, LLC.
Montrose, CO

Time of useful consciousness at FL250 is 10-15 seconds without
supplemental O2.

wrote:
[snip]
But these systems are not designed to deliver anything close to pure O2 to
the user. The maximum O2 concentration they CAN deliver will provide
sufficient O2 PP at about 18000 ft for cannulas and about 26000 ft (if I
recall correctly) for masks.
[snip]

"john smith" wrote in message
...
Time of useful consciousness at FL250 is 10-15 seconds without
supplemental O2.

He's talking about using cannulas versus a full face mask.


wrote:
[snip]
But these systems are not designed to deliver anything close to pure O2
to
the user. The maximum O2 concentration they CAN deliver will provide
sufficient O2 PP at about 18000 ft for cannulas and about 26000 ft (if I
recall correctly) for masks.
[snip]

I've been at 23000 feet hanging on to a bar out side of the airplane
with 300 of my best friends without oxygen. We used supplemental o2
(mostly cannulas) on the climb to alt but when it was time to climb out
of the aircraft we were without o2 during the 30-45 seconds waiting to
exit.
We didn't carry o2 on us, but were in more dense air in short order.
We learned to conserve our energy so we didn't burn the o2 we had stored
in our bodies.
There have been climbers that have reached the top of everest without o2.
keeping calm is the secret to most high altitude operations.






Matt Barrow wrote:
"john smith" wrote in message
...

Time of useful consciousness at FL250 is 10-15 seconds without
supplemental O2.


He's talking about using cannulas versus a full face mask.


wrote:
[snip]

But these systems are not designed to deliver anything close to pure O2

to

the user. The maximum O2 concentration they CAN deliver will provide
sufficient O2 PP at about 18000 ft for cannulas and about 26000 ft (if I
recall correctly) for masks.

[snip]

wrote in message ...
I've been at 23000 feet hanging on to a bar out side of the airplane
with 300 of my best friends without oxygen. We used supplemental o2
(mostly cannulas) on the climb to alt but when it was time to climb out
of the aircraft we were without o2 during the 30-45 seconds waiting to
exit.
We didn't carry o2 on us, but were in more dense air in short order.
We learned to conserve our energy so we didn't burn the o2 we had stored
in our bodies.

IN which case you have ONE and only ONE decision to make during that lfight
:~)


There have been climbers that have reached the top of everest without o2.
keeping calm is the secret to most high altitude operations.

And acclimation.

Oxygen for flights over 5000 feet at night? I live at 5800 feet and the
cannula gets in the way when having sex.





Matt Barrow wrote:
"john smith" wrote in message
...

Time of useful consciousness at FL250 is 10-15 seconds without
supplemental O2.


He's talking about using cannulas versus a full face mask.


wrote:
[snip]

But these systems are not designed to deliver anything close to pure O2

to

the user. The maximum O2 concentration they CAN deliver will provide
sufficient O2 PP at about 18000 ft for cannulas and about 26000 ft (if
I
recall correctly) for masks.

[snip]

wrote:

We learned to conserve our energy so we didn't burn the o2 we had stored
in our bodies.

Thats nice.. unfortunately, the body doesn't store oxygen. It either
uses it or it doesnt. That is a medical fact, regardless of what type of
old wives tales you apply to it.

Dave

Hey dave,
Ever swam under water?
Ever hypervent your self before taking that last breath so you can stay
down longer?
What would you call that?


Dave S wrote:



wrote:

We learned to conserve our energy so we didn't burn the o2 we had
stored in our bodies.


Thats nice.. unfortunately, the body doesn't store oxygen. It either
uses it or it doesnt. That is a medical fact, regardless of what type of
old wives tales you apply to it.

Dave