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Nobody has ever stated that ISS was the sole factor in determining a profile's effectiveness. As Dr. Doolette has stated, "The integral supersaturation is an “algorithm-independent” way to look at the magnitude and duration of supersaturation of a schedule prescribed by any algorithm, it is...

It sounds like you're ignoring partial pressures from O2, CO2, and H2O (water vapor). I don't think that's the best model. VPM itself uses the other gases in its model (e.g. look in the VPM code for "Constant_Pressure_Other_Gases"). Thalmann has also stated, "The total tissue gas burden is...

Then that's likely the difference.

What value are you using for the pressure from other gases besides N2?

Hi LD, My guess is Dr. Mitchell took a snap of the charts and then labeled them more appropriately for his presentations. The originals do say mb-min and indicate the scale is in thousands. They're posted on multiple forums ... here's an example.

Assuming P0 < M, if Pi = M then that tissue compartment can never on-gas to M either. P will asymptotically approach M but never technically get there. You certainly can't exceed M. Therefore, when P0<M you can check Pi <= M and, if true, then you can set the NDL to 999 (or whatever number...

I guess it depends on whether exceeding your NDL means 1) you exceed a certain max value (then use Pi<=M0), or 2) you equal or exceed the max value (then use Pi<M0).

P0<M0 means condition 1 passes. In that case Pi<P0 implies Pi<=M0 so the table provides NDL =999.

You can still use Baker's formula I think if you just look for conditions where you're already in deco (i.e. NDL=0) or where you can never reach deco (i.e NDL=999). For example,

On this topic, the problem with VPM's treatment of increasing gas loads in slower compartments was discussed here.

I'd just say it's probably time to listen to, rather than ignore, the data :). Cited studies below were lifted from posts somewhere by Dr. Mitchell. Pearl Diver Data: "Thirteen depth/time recordings were made of such dives, and these dives resulted in 6 cases of DCS (46% incidence). The...

As far as I can tell you're the only one making a definitive claim. Your claim is shown above -- that, for example, GF10/80 can't be less safe than GF60/80. Based on the information we have from available studies, that claim is unsupportable. And we can show one study where using lower...