Hey Colin,

There no such thing as too much oxygen... Without it, we would end up on the wrong side and the air-grass interface.

I've over 3000 hours flying Navy fighters and all 3000 hours were spent breathing 100% oxygen from takeoff or Cat Shot to landing or arrested landing aboard ship on missions lasting an average of 1.8 hours and a few extended missions up to 7 hours.  I'm still here at 73.

Part of your problem with high O2 consumption deals with the method of oxygen therapy you're using.  The following method of oxygen therapy I developed calls for hyperventilation at forced vital capacity tidal volumes with room air for 30 seconds followed by inhaling a lung full of 100% oxygen and holding it for 30 seconds.  Four to seven complete cycles like this usually results in a CH pain free abort.

If you understand basic respiratory physiology, hyperventilating like this results in respiratory alkalosis...  Remember the movie The Andromeda Strain?

The adult lungs hold ~ 4 liters or air or oxygen. That means 4 to 7 cycles using the above method of oxygen therapy consumes 16 to 28 liters of oxygen per abort.  The standard method of oxygen therapy at a flow rate of 15 liters/minute consumes 280 to 350 liters of oxygen to achieve an abort.  That means the method of oxygen therapy I developed consumes one tenth the volume of oxygen as the common method of oxygen therapy.

Is this new method of oxygen therapy effective?  In a word, YES.  In more words, like 99% effective if started before the pain level reaches 9 on the 10-Point Headache Pain Scale.  Once a CH has reached a 9 or 10 we're all in for some heavy sledding.

The following chart comes from a pilot study of the oxygen demand valve method of oxygen therapy where users inhale from the demand valve much the same as a SCUBA regulator at an effective oxygen flow rate of 40 liters/minute.  The results are illustrated on the bottom line.  The upper line represents the times to abort by pain level using an oxygen flow rate of 15 liters/minute.

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The new method I developed is just as effective as the demand valve (DEVO2) method, but consumes one tenth the oxygen as the oxygen demand valve method and you don't need to go to the expense $400 to $550 of buying one.

The following link will take you to a post I made that covers the breathing technique and procedure for this new method of oxygen therapy.  It also illustrates how to build a DIY Redneck oxygen reservoir breathing system you can build for less than a couple dollars and that works very effectively with the new oxygen therapy procedure.

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While you're at it, download a copy of the anti-inflammatory regimen CH preventative treatment protocol.  If you follow this treatment protocol, the odds are high you'll experience a favorable response with a reduction in CH frequency that will further reduce your oxygen therapy oxygen consumption.

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Take care and please keep us posted.

V/R, Batch