tracheostomy: a surgical operation that creates an opening into the trachea with a tube inserted to provide a passage for air; performed when the pharynx is obstructed by edema or cancer or other causes
operation: a medical procedure involving an incision with instruments; performed to repair damage or arrest disease in a living body
wake-up call: a telephone call that you request be made a specific time in order to wake you up at that time (especially in hotels)