She recovered quickly so she was released from ER to observation for 48 hours. In those 48 hours we would see new doctors and nurses every 8 hours, explain everything again, so they wouldn't miss any details from the history, and every now and then a doctor would come up with a new theory and order studies without first consluting with a specialist in that area.
One of this theories was epilepsy, after that we went to see a neuropediatric and dismissed the theory inmediatly, even before seeing the study.
All of this was in a stable condition, I can't imagine going through the same in critical condition. So, altough I think 30 hour shifts are excesive, I can understand why long shifts are important.