my ds has a vsd and needs yearly heart scans. his first was when he was about 3mo and now we have his second one next week. how will i keep him still? last time it took about 20mins to complete the scan and at his young age he didn't move and it was easy. at 8mo he had to have a scan on his hips and it was a nightmare to keep him still and i had to pin him down and he was screaming 
now he needs another and he's so much older and so much more mobile. i can't occupy him for more than a couple of mins before he dashes off to find something more interesting to play with. he is a big boy (91st centile) and very strong and if i have to hold him still he will scream and the Dr won't be able to hear the beats that he needs to.
if anyone has any recommendations or advice it'll be much appreciated. im at a loss really. he won't lay still long enough for even a nappy change just lately.
excuse poor grammar im on my phone.