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.

Question

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.

Quizplus · Accepted Answer

During the exsufflation phase of mechanical insufflation-exsufflation, airway pressure is abruptly decreased to –30 to –50 cm H2O, this negative airway pressure is maintained for 2 to 3 seconds, and peak expiratory "cough" flows can reach near normal values, effectively simulating a natural cough.

What Happens During the Exsufflation Phase of Mechanical Insufflation-Exsufflation