Digital stuck in his ear?
Or a mercury thermometer inserted rectally?
Or something else I don't know about?
EDIT (Wow! You guys are fast!): The answers are all over the board, so in case it helps, I'll add that the child in question is 6 1/2, thin but not malnourished, and the location is suburban Virginia. Not metropolitan state of the art, but not BFE, either.
(Dr. is checking the vitals because pt's dad saw a white coat when he walked in the ER door and wouldn't take no for an answer, and the kid is sick enough that the doc isn't making an issue of it.)