First Responder

A certified first responder is a person who has completed a course and received certification in providing pre-hospital care for medical emergencies. They have more skill than someone who is trained in basic first aid but they are not a substitute for advanced medical care rendered by emergency medical technicians (EMTs), emergency physicians, nurses, or paramedics. First responder courses cover cardiopulmonary resuscitation (CPR), automated external defibrillator usage, spinal and bone fracture immobilization, oxygen and, in some cases, emergency childbirth as well as advanced first aid. The term "certified first responder" is not to be confused with "first responder", which is a generic term referring to the first medically trained responder to arrive on scene (police, fire, EMS). Most police officers and all professional firefighters in the US and Canada, and many other countries, are certified first responders. This is the required level of training. Some police officers and firefighters take more training to become EMTs or paramedics.

Scope of practice
Emergency responders are tested during a training exercise.

First Responders in the US can either provide emergency care first on the scene (police/fire department/park rangers) or support Emergency Medical Technicians and Paramedics, provide basic first aid, CPR, Automated external defibrillator use, spinal immobilization, oxygen, and assist in emergency childbirth (in some areas they are trained in the use of suction and airway adjuncts. CFRs can also assist with providing glucose, aspirin,and epi-pens. They are also trained in packaging, moving and transporting patients.

From Wikipedia