Interesting you should mention that. I learned a few days ago that while the ISS at large is kept at 1ATM, the spacesuits they use for spacewalks are only pressurized to a fraction of that (if you pressurize a suit too much, it becomes too balloon-like to easily move). Because of this astronauts/cosmonauts have to spend several hours before each space-walk breathing pure oxygen so that they don't get the bends.
That degree of preparation before every spacewalk would disturb me to some extra degree I think. If there was a problem, it's not like somebody else could just hop into another suit and come help you.