I watched @Dr Simon Mitchell presentation Decompression Controversies on Youtube for the umpteenth time.
Around minute 33, he starts to discuss the problem with bubble model deep stops using gradient factors 20/90 as an example. He graphically demonstrates that while the fast compartment is off gassing at 20% of the supersaturation (Buhlmann) limit, slower tissues were still on-gassing and this was the crux of the problem. The penny dropped and I thought the simple solution would be not to apply the GFlow to the fast compartments (say the first 4) and apply the GFlow to the remaining 12. Using Mitchell's example; Compartments 1-4 would be set at 90/90 and 5-16 would be set at 20/90. The deco stops would be a bit shallower but you reduce this on-gassing problem to an extent because the intermediate, rather than the fast compartments would dictate the first stop. Of course I don’t think I am the first to come up with this idea; hence my question; is it common or generally assumed to apply GFlow to all 16 compartments in Buhlmann’s model or are the fast compartments excluded? Have any system developers programmed a Gradient Factor decompression model that has implemented the above idea or some variant (eg c1=90/90, c2=70/90, c3=50/90, c4=30/90, c5=20/90….)? I believe my logic is sound unless someone can explain a fundamental problem with the concept.
Around minute 33, he starts to discuss the problem with bubble model deep stops using gradient factors 20/90 as an example. He graphically demonstrates that while the fast compartment is off gassing at 20% of the supersaturation (Buhlmann) limit, slower tissues were still on-gassing and this was the crux of the problem. The penny dropped and I thought the simple solution would be not to apply the GFlow to the fast compartments (say the first 4) and apply the GFlow to the remaining 12. Using Mitchell's example; Compartments 1-4 would be set at 90/90 and 5-16 would be set at 20/90. The deco stops would be a bit shallower but you reduce this on-gassing problem to an extent because the intermediate, rather than the fast compartments would dictate the first stop. Of course I don’t think I am the first to come up with this idea; hence my question; is it common or generally assumed to apply GFlow to all 16 compartments in Buhlmann’s model or are the fast compartments excluded? Have any system developers programmed a Gradient Factor decompression model that has implemented the above idea or some variant (eg c1=90/90, c2=70/90, c3=50/90, c4=30/90, c5=20/90….)? I believe my logic is sound unless someone can explain a fundamental problem with the concept.