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There's a great thread about this over on CCRExplorers with people like Simon Mitchell and David Doolette chiming in.
You are correct! My bad. My REALLY bad. I read the wrong date in the citation when i went to the publication.wait 30 years old? wat?
Doolette (one of the authors) was in highschool 30 years ago! That can't be right!
Edit: according to the internet its a late 2014 study published in 2015.
There's a great thread about this over on CCRExplorers with people like Simon Mitchell and David Doolette chiming in.
In a nutshellHere is the link in clickable form: Altering blood flow does not reveal differences between nitrogen and helium kinetics in brain or in skeletal miracle in sheep. - PubMed - NCBI
Can you provide a quick summary of your impressions?
I wonder how to set a DC for the correct gases but honoring the longer time He takes according to this study.
Read this again.
"1 - You might need the longer deco that the 'helium penalty' gives you (maybe even more), but not because of the helium, but because longer and deeper dives (where you're apt to use helium) carry a higher % of DCS risk."
Note the words helium penalty are in quotes, as the study is showing that the required decompression obligation (which probably isn't long enough) is due to the length and depth of the dive. The helium is incidental in that you're more likely to use helium on these types of dives, not that the helium content is the cause for the extended decompression obligation. Basically, for years we've been blaming helium, when really it's just the length and depth of the dive.