Working characteristics of a new ventilator with automatic secretion clearance function

Secretions in the airways of ventilated patients must be cleared efficiently and timely. A novel ventilator （SC ventilator） is proposed with an automatic secretion clearance function in order to provide a new approach. A mathematical model of a venti- lation system with the SC ventilator is set up to optimize the SC ventilator. Based on the research, conclusion can be reached as follows. First, the experimental results and the mathematical model are proved to be authentic and reliable. Second, the se- cretion clearance efficiency of the SC ventilator may be higher than that of IL-IE device. Finally, increasing the inspiratory positive airway pressure or decreasing the expiatory positive airway pressure of the SC ventilator can improve the efficiency of the secretion clearance. This paper lays a foundation for the secretion clearance improvement of the SC ventilator.