I'm so glad they are so proactive there! Malrotation is really a scary killer because it so often looks like the flu or a stomach bug, so often hospitals just brush it off as such. Since you're a pediatrician I hope you don't mind me sharing with you that often kids with malrotation and volvulus do not have abnormal blood labs. They did check my daughters blood several times and it was mostly normal or occasionally slightly dehydrated (slightly low sodium and potassium usually, and I think slightly elevated calcium and one other thing - but just slight). Amylase and lipase were always very normal (not sure what those really mean, but I do know the doctor said those can sometimes indicate obstruction). Even with volvulus her blood was very near normal, nothing they would have been concerned about. Her surgeon said he had seen this happen several times with volvulus because a lot of the necrotic fluid and tissue can remain trapped in the tightly twisted loop for awhile before it starts permeating out and effecting blood test results. Something to keep in mind if you ever come across it. Also worth mentioning ultrasounds don't always catch a volvulus, it did catch my daughters which I am so thankful about because if it hadn't I don't think they would have done further testing. But most are actually found by barium swallow which is about 95% accurate for catching it.
Thank you StatsGirl!! She is doing so well now, which I am thankful for every day. I am so sorry your parents had to go through the same thing!! But it is a good reminder to all patients and caregivers that if you think your doctor is wrong, you really truly should keep fighting until you find one who will listen.