2 breath or not 2 breath thats the question

[MATTBIN]

Originally Posted by Padowan

purely looking at offgassing, you have a tissue happily offgassing fast into an N2 lean environment then "bang" you, hit it with a 0.79bar PPN2, I really don't know how a tissue would respond to that, but if I can delay it, that must be better?

Wouldnt that be the case if you came off your 80/100% on the boat and hadnt fully off gassed that tissue? I'm not suggesting you dont continue using the high O2 on the boat, just you are going to hit the tissue compartment at some point anyway. I assume it may be better to hit a slow compartment rather than a fast one i.e. bone instead of brain.

Matt

[Padowan]

Originally Posted by MATTBIN

Wouldnt that be the case if you came off your 80/100% on the boat and hadnt fully off gassed that tissue? I'm not suggesting you dont continue using the high O2 on the boat, just you are going to hit the tissue compartment at some point anyway. I assume it may be better to hit a slow compartment rather than a fast one i.e. bone instead of brain.

Matt

Yep, but the moment that you surface, the governing tissue is still likely close to it's critical level of saturation, and considering the variability in peoples physiology, the non-representativeness of all models and the other random daily variables, the longer you can safely offgas this tissue the further away you get from a problem.

A number of algorithms, work on a bend-and-mend principle with the stops, if your last stop transition happens still put you close to the limits, it might not be a good thing, and the continued fast N2 offgassing rate you would get by staying on the O2 would add conservatism.

[eddy]

Woops click on the wrong option :-(

Eddy