1A room in a hospital where surgical operations are performed; the operating theatre/operating room.
手術室は許可された医療スタッフ以外立ち入り禁止です。
The operating room is off-limits to anyone other than authorized medical staff.
患者は午後に手術室へ運ばれ、すぐに準備が始まった。
The patient was taken to the operating room in the afternoon, and preparations began immediately.
手術室の空気は常に滅菌されているため、清潔な服装が必要だ。
Because the air in the operating room is constantly sterilized, clean clothing is required.