Yes, I’ve seen kids admitted from the pedi office to the ICU for; leukemia (patient was pale and doctor suspicious), diabetes (noted fruity breath), emergency tracheotomy (it was the first time the doc had seen the infant sleeping and realized his breathing was VERY compromised, something the family had missed for 6 months), once an infant was rushed (he ran—with him in his arms) from the pedi’s office in his arms to our ICU. The parents brought him in for a well check, not realizing he was deathly ill. He died soon after he landed on our doorstep. The parents were outside of the unit talking and laughing, not realizing how ill their child was (we’d not had a chance to talk with them yet), when the doctor had to go out to tell them that their ‘well’ infant was dead, they were of course stunned. Those are off the top of my head, given a few hours I could probably come up with many more.
We do CT and MRI scans to find what we used to do exploratory laproscopies for. The incidences of the ‘exploratories’ went waaay down after this technology came into play. The only common ‘exp lap’ I can think of is in the case of appendicitis when we are 99% sure of what it is, and there is no reason to waste the time and money (oops, did I mention saving money?).