A medical area/facility for initial treatment of sudden illnesses or injuries; an emergency room (ER).
交通事故でけがをしたため、救急医療室で手当てを受けた。
Because of injuries from a traffic accident, I received treatment in the emergency room.
救急医療室では重症の患者が優先されることが多い。
In the emergency room, seriously ill patients are often prioritized.
夜間は救急医療室が混雑することが多いので、受診前に連絡するとよい。
The emergency room is often crowded at night, so it's good to call before going.