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.

Question

Quizplus · Accepted Answer

During the exsufflation phase of mechanical insufflation-exsufflation, airway pressure is abruptly decreased to a negative value (typically between -30 to -50 cm H2O), this negative pressure is maintained for 2 to 3 seconds to mimic a natural cough, and as a result, peak expiratory "cough" flows can reach near normal values, effectively clearing the airway.

What Happens During the Exsufflation Phase of Mechanical Insufflation-Exsufflation