Complex sentence: Guided by Karl over the phone, Susan is forced to perform an emergency tracheotomy on Lou, and although he pulls through and makes a full recovery, Susan is traumatised by the event and Nate manages to counsel her through post-traumatic stress.
Split into simpler sentences: Guided by Karl over the phone, Susan performs an emergency tracheotomy on Lou. He makes a full recovery, but Susan is traumatised by the event and Nate helps counsel her through post-traumatic stress.