[zaarn]

>Also, this has nothing to do with decompression sickness (aka 'the bends'). That is to do with dissolved gases in the blood which turn into bubbles when the pressure is lowered.

Dissolved gases dropping out of solution and forming bubbles is literally decompression sickness.

[clort]

Yes, I'm pretty sure that is exactly what I wrote?

[zaarn]

Dissolved bubbles in blood has everything to do with the bends.

[clort]

You have twice restated exactly what I have written, thank you.

and for clarity: 'forcing air into respiratory cavities in the skull' would not prevent the bends.