IVPA

Etymology
, meaning "while waiting for ambulance".

Noun

 * 1) An emergency response where medical aid is given until an ambulance arrives.

Usage notes

 * While the term can be used to describe any situation where one is waiting for an ambulance; it is more commonly employed in scenarios where the response time is considerable or when all ambulances are otherwise engaged. For instance, it is a type of dispatch given to firefighters.