How does expiration take place after a positive-pressure breath during an IPPB treatment?

Question

Quizplus · Accepted Answer

Whereas inspiration during IPPB occurs with the assistance of positive pressure applied to the airways,expiration is passive.The elastic recoil of the lungs and thorax allows the patient to exhale passively.During expiration,all gas flow through the breathing circuit toward the patient as well as gas delivered to close the exhalation valve,has stopped.With no flow,the exhalation valve is open.As the patient exhales,the gas flows through the exhalation port out into the room.

How Does Expiration Take Place After a Positive-Pressure Breath During