Re: New NITROX diving protocol/questions

[Guest guest]

I have a question for the hyperbaric medicine physicians; in the world of scuba

diving, there's a new mixture called " Nitrox " which can be up to 40 percent

oxygen and 60 percent nitrogen.  Up until this development, most recreational

diving, at least, has been done with air, which has of course approximately 21

percent oxygen and the remainder primarily nitrogen. I gather that commercial

divers have been using higher oxygen blends for some time.

Nitrogen of course, while an inert gas, builds up in  the joints and other

potential body cavities under higher than 1 ATM, and is what causes the " bends. "

The point of the new mixture is that it prolongs the amount of time a diver can

spend underwater as there is less nitrogen, and using new PADI dive tables,

diving at 15 to 30 feet would be possible for either longer dives, or more

dives/day.

Theoretically, it would make sense that 40 percent oxygen at 1.5 ATM would be

beneficial to someone with a TBI or other brain injury which has caused anoxia. 

Is there a downside regarding the nitrogen exposure?  Is there any literature in

hyperbaric medicine on the subject?

I hesitate to even bring this up, because few people with brain injuries, or

other conditions which could benefit from hyperbaric oxygen are in any kind of

shape to be scuba diving, and most, given the effects of TBI on judgment,

concentration, and memory, for example, should be strongly discouraged from

considering this as an alternative to the controlled environment of a clinic

setting.  However, it is becoming more widely available, and some people with

mild TBI, for example, who are PADI certified and otherwise in good health, will

probably be looking into it.

Just wondering....

From:

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