What Happens During the Exsufflation Phase of Mechanical Insufflation-Exsufflation

question 60

Multiple Choice

What happens during the exsufflation phase of mechanical insufflation-exsufflation?
1) Airway pressure is abruptly decreased to -30 to -50 cm H₂O.
2) Negative airway pressure is maintained for 2 to 3 sec.
3) Peak expiratory "cough" flows reach near normal values.

• A)1 and 2 only
• B)2 and 3 only
• C)1 and 3 only
• D)1, 2, and 3