SDI TDI UK shared this document over on Facebook not that long ago. It will make interesting reading to any diver, but especially technical divers and even more so rebreather divers.
http://www.hse.gov.uk/research/rrpdf/rr1073.pdf
If you are planning your bailout on your normal (and probably optimistic) breathing rate of 15 to 20 litres per minute then the suggestions from the report that a hard working (or panicked) diver could be breathing as much as 50 to 75 litres per minute might make for some hard reading and maths. Obviously planning a full bailout on 75 l/min is not really practical, and as the paper states would not be maintainable for any duration of time.
My own personal bailout planning assumes a high initial breathing rate (usually in the region of 40 l/min) that will eventually settle down closer to normal as I work through the ascent and deco stops.
