What is the correct way to ask for assistance in a medical emergency in Spanish?

Asking for assistance in a medical emergency requires expressing a clear and immediate need for medical help. The phrase "Llama a una ambulancia" directly communicates the need to call an ambulance, which is essential in emergencies where urgent medical attention is needed. The ambulance is typically the fastest way to get professional medical help; thus, using this phrase effectively conveys the urgency of the situation.

Other options may not provide the same level of immediacy or specificity. While "Ayuda a un niño" translates to "Help a child," it may not indicate that the individual is in need of immediate medical assistance. "Llame a un doctor" means "Call a doctor," which implies a different scenario—sometimes doctors are not immediately available and may not be the quickest solution in an emergency setting. Lastly, "Llame a la comunidad" translates to "Call the community," which is vague and does not specify the need for medical intervention. Therefore, "Llama a una ambulancia" stands out as the correct choice for efficiently addressing a medical emergency in Spanish.