1Operating room (OR) — an abbreviation of operating theatre/operating room used in hospitals.
オペ室に入る前に全員が消毒を行った。
Everyone sterilized themselves before entering the operating room.
看護師はオペ室の器具を準備した。
The nurse prepared the instruments in the operating room.
主治医がオペ室で予定通り手術を始めた。
The attending physician began the operation in the OR as scheduled.