ScubaSamScubaStevesFather
Contributor
I tried looking on google scholar, as well as other posts on this forum. I can't find any evidence based articles to support whether nitrogen off-gassing is more efficient at 10ft or 20 ft when decompressing on 100% oxygen. I'm looking for actual evidence based studies that can help decompression divers decide on breathing oxygen at 10 feet or 20 feet.
One argument is that at 10ft, the ambient pressure difference is higher, therefore this should accelerate nitrogen off-gassing.
The opposite argument is that at 20ft, the partial pressure of pure oxygen is higher, therefore this should also accelerate nitrogen off-gassing.
So the solid question is: For pure oxygen, is 10ft 1.4 PPo2 or 20 ft 1.6 PPo2 more efficient for nitrogen off-gassing?
Some interesting thoughts that might influence this:
1) The pressure difference between 10 feet and 20 feet seems to be a significant difference when compared to a deeper depth, whereas the difference between 1.4 and 1.6 PPo2 is the same regardless of depth (its possible this is not true) <- this might help support the argument for 10 feet
2) Since pure oxygen is being breathed, there shouldn't be any nitrogen on-gassing at either depth, for any of the tissue compartments <- this might help support the argument for 20 ft
One argument is that at 10ft, the ambient pressure difference is higher, therefore this should accelerate nitrogen off-gassing.
The opposite argument is that at 20ft, the partial pressure of pure oxygen is higher, therefore this should also accelerate nitrogen off-gassing.
So the solid question is: For pure oxygen, is 10ft 1.4 PPo2 or 20 ft 1.6 PPo2 more efficient for nitrogen off-gassing?
Some interesting thoughts that might influence this:
1) The pressure difference between 10 feet and 20 feet seems to be a significant difference when compared to a deeper depth, whereas the difference between 1.4 and 1.6 PPo2 is the same regardless of depth (its possible this is not true) <- this might help support the argument for 10 feet
2) Since pure oxygen is being breathed, there shouldn't be any nitrogen on-gassing at either depth, for any of the tissue compartments <- this might help support the argument for 20 ft