The basic principles of cryo-sleep are that when the body is put into it, the metabolism is *drastically* slowed, meaning the requirements for oxygen, food and the like are cut to almost non-existant levels.
This happens for certain animals in nature to survive the winter and whatnot. I remember there was a species of frog that purposefully buried itself under lakes that would freeze over. They 'died' and their body shut down outside the most extreme requirements. When the tempatures warmed enough, they'd thaw out and return to normal, having survived underground, frozen, with no food or anything for months.
So in short, yes, when cryo-frozen the body does need pretty much zilch for supplies. 90 minutes of continuous air wouldn't last him forever, but it would last him several months I could bet.
The bronchial surfacant, from what i remember in the books, is more or less to help retain nutrients in the body. It would keep the lungs 'moist' to a degree, and then post sleep, you would(or at least are supposed to according to the books) regurgitate and swallow the stuff, and any nutrients lost would be digested and put back into your system.