"changing the staff that deal with ..."

What could be improved

changing the staff that deal with children

Anything else?

me and my partner took our son for a mag scan which means he has to be sedated. they put numbing pads on his hands and feet and then attempted to put the needle in his arm. when he started crying a nurse came into the room, twisted my sons arm and tried to insert the needle. i was upset and left the room and when my partner complained about the force that was being used he was ignored and had to physically remove my son from the nurse. i was kept outside while this was happening dispite trying to get back in the room and my son then had bruises on his arm for 2 weeks after this from the force that was used.