First off, big hugs to all of you. That is scary and not something I hope we ever have to experience. It is possible that there was something on her finger that caused a higher reading. We have seen it happen but we are fortunate enough to also have a Dexcom CGM so if we get a reading that does not match up fairly close with the numbers it is giving us then we automatically recheck to make sure the meter is correct before correcting.
We actually had a high of about 300 last week while we were on vacation and within about 40 minutes he had dropped like a rock to about 60 and was still headed down with lots of IOB and we had to start carbing him up to prevent him from bottoming out. The Dex alerted us that he was dropping rapidly so we were able to react accordingly. I would never have thought to check at that point otherwise since the insulin hadn't really even kicked in yet (normally takes about 1 hour for us to really see any movement in his numbers)
I hope you never experience that again. I would say for a little while anyways I would be more likely to double check some readings that seem "off" just to be safe. I know I have done it. If I know my carb ratios and basals are right (or at least close!) then a weird high usually warrants a double check.
Logan, age 6, dx on 10/23/08
Blue Animas Ping started 12/20/09 ~ Novolog ~ Contact Detach Sets
Dexcom CGMS started 2/23/09 ~ Dexcom Seven + upgrade 5/22/09, Dexcom G4 started 9/2012
Kristen, age 22 - Non-D