1, "cardiopulmonary resuscitation" means "cardiopulmonary resuscitation". Once cardiac arrest occurs, if it is not rescued immediately, it will cause irreversible damage to the patient's brain and other important organs and tissues after 4 ~ 6 minutes. Therefore, cardiopulmonary resuscitation (CPR) must be rescued at the scene immediately after cardiac arrest.
2. "EMS" refers to "rescue medical service", also known as "first aid". In case of any accident or emergency, the rescuer will make temporary and appropriate initial rescue and care for the wounded and sick according to the principle of medical rescue before the medical staff arrive, and then send them to the hospital as soon as possible.