Complex sentence: Discarding the obvious conclusion of drunkenness, Kildare suspects the man has a serious medical problem, when he has to respond to an urgent second call, he orders the skeptical Wayman to give the man oxygen all the way to the hospital.
Split into simpler sentences: Discarding the obvious conclusion of drunkenness, Kildare suspects the man has a serious medical problem. Hhen he has to respond to a second, more urgent call, he orders the skeptical Wayman to give the man oxygen all the way to the hospital.