Wifi-enabled scales that connect to webservices already exist on amazon - I assume the hard part is getting some certification so doctors/nurses can 'prescribe'

Wifi-enabled scales that connect to webservices already exist on amazon - I assume the hard part is getting some certification so doctors/nurses can 'prescribe' it to patients when they leave hospital or while they're in hospital and getting the webservice to talk to $hospitalSoftware, etc?