Oh, not sure if you heard about this, but apparently there was some Alcor and CI sponsored research and the result was basically that it's a really good idea to make arrangements for, well, if anything happens to you to begin being cooled immediately, and actually even better, to have your blood washed out. India ink and rat ( :( ) experiments suggest that being a warm body for even a couple hours is enough to more or less cause effects like thickening blood and so on to more or less prevent any significant amount of cryoprotectant from actually ending up in the brain. (AFAIK, they're working on updating their suspension protocols based on this info)

An immediate water+ice bath makes a big difference, and immediately washing out the blood makes a HUGE difference.

(At least, such info was presented by the experimenters when I went to the CI general meeting a couple weeks ago. I'm having some trouble finding info this specific research at the moment, though.)

Just figured you probably ought to know this for when you start to be at increased risk, so you may want to look into those experiments and make arrangements with regards to that.

Here's hoping though that this is all academic and that you won't actually need this, as it were.

EDIT: IIRC, it was these two that did that research and presented those results.