I'd have done the same. One of the great strengths of pre-hospital medicine is recognising when the best thing for the patient is the hospital, and it sounds like that was the case in this job. Getting IV access in a paed is *hard* - an ill paed with dehydration must be much, much worse. Even if you did get a line, it'd probably blow/fall out en route, and wouldn't really achieve much (plus how long would you fart about calculating paed drug doses). Meanwhile, 6 minutes away is a paed anaethetist who's job, day in day out, is to do exactly that. S/he'd be so much better for the kid right now. So use the one remaining tool in your armoury, and hoof it there.