What Happens During the Exsufflation Phase of Mechanical Insufflation-Exsufflation

question 69

Multiple Choice

What happens during the exsufflation phase of mechanical insufflation-exsufflation?
I. Airway pressure is abruptly decreased to –30 to –50 cm H2O.
II. Negative airway pressure is maintained for 2 to 3 seconds.
III. Peak expiratory “cough” flows reach near normal values.

• A)I and II
• B)II and III
• C)I and III
• D)I, II, and III

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