Hook breathing for decompression?

[Quicksilver8ball]

Has anyone looked into the effects of hook breathing on the removal of nitrogen after deep dives? From my limited understanding, hook breathing increases the pressure of both the air in your lungs and your blood pressure, which in theory should simulate pressure at depth and allow decompression in the same way, albiet for a few seconds at a time. Does anyone have any data on the pressures produced during hook breathing? You should only need a pressure increase of 0.6 bar to simulate a decompression stop at 6 metres.

 

[Mullins]

Overpressure in your lungs would reduce the rate of nitrogen removal. Hook breathing is very brief and would be fairly low pressure though, so no noticeable effect I expect.

If you were (theoretically) able to do a really forceful hook breath and hold it, you might be able to give yourself DCS without going under water.

 

[mattbigblue]

What technique would You use Dave to reduce DCS risk during deep dive other than slowing down on last 25m and making a brief stop beneath the surface?

 

[Mullins]

I do go pretty slowly in the last ~20m but that's more dive style than DCS mitigation. TBH there's not much to do except limit deep dives to 1 per day, then breathe O2 immediately afterwards.