Final answer:
After completing the primary assessment of an unresponsive patient struck by a vehicle, the next step is to initiate basic life support measures, including CPR and activating the EMS.
Step-by-step explanation:
After completing the primary assessment of an unresponsive patient struck by a vehicle, the next step is to initiate basic life support measures. This includes performing cardiopulmonary resuscitation (CPR) if the patient is not breathing or does not have a pulse. It is important to begin CPR as soon as possible to improve the chances of the patient's survival.
In addition to CPR, you should also activate the emergency medical services (EMS) by calling for an ambulance or asking someone nearby to call for help. The EMS personnel can provide advanced medical care and transport the patient to the hospital for further treatment.
Remember to continue providing care and support to the patient until the EMS arrives. This may include providing reassurance, managing any visible injuries, and keeping the patient stable.