The problems clearly are negligence on the part of parents to follow safety measures as well as high chairs falling short of stipulated safety standards.
It is important that children aged 3 and below be supervised while sitting on a high chair.
"It was not infrequent that we saw restraining straps were not used. We know that means many chairs that don't meet current standards are still being used. Not meaning to be an alarmist, but these injuries aren't few; they're common and they can be serious. You need to use the restraints every time. That is really the take-home message," study authors said.