She finally realizes the sound is coming from the oxygen-starved patient. During the next abortion, the anesthesiologist discusses his daughter's graduate school plans. He shows Denes signs of cyanosis in the patient's fingernails and lips. So they don't breathe at all. Denes expresses alarm that the patient might be brain damaged by the lack of oxygen.
Denes points out that the patient seems to have stopped breathing.
She is all right. I myself think she would go to Michigan, provided it's just as good a school. Denes continues to express alarm. She has stopped breathing just this second. He puts the oxygen mask on the patient.