Things do change fast, in the medical field that happens ten times fold. Its very difficult to keep it up. So I will break it up for you, personal care assistant is the lowest level on the field, include companion and medication reminders and all day living. Home health aide offers a midlevel support including doctors appointment and escort, lay out medication and connection with the doctors.
Certify nurses aide is available to provide medical care to clients, like vital signs and change a dressing the latter has to be supervised by a registered nurse or practical nurse.
A license practical nurse is more intense, vital signs, medical care with or without the registered nurses supervision.
When I started in the healthcare field I was a personal care assistant performing many practical nurses descriptions. I loved, I always know that I could delivery.