基于模拟人类自然咳嗽的智能吸痰技术研究

Cough is a protective respiratory airway reflex of human. When the respiratory airway is irritated, the secretions and foreign bodies can be excreted through a cough maneuver to keep the airway clean. However the ventilated patients in intensive care unit(ICU)cannot produce an effective cough because of the establishing of artificial airway. Along with the impaired cough, secretions can accumulate in airways which may threat life. As one of the most important nursing interventions of ventilated patients’ respiratory tract, secretion clearance is usually used to keep the respiratory tract clear, improve alveolar ventilation and patients’ breathe function. However, the existing secretion clearance technologies have serious defects in efficiency, safety and automation. Considering the defeats in current secretion clearance technologies, an intelligent secretion clearance technology based on simulation of the human natural cough is proposed. The pressure-time adaptive algorithm used in this technology has replaced the current open-loop control and improved the safety and efficiency. Through the experiment study, the mathematical model and control algorithm have been verified. The results show that this technology provides a constructive suggestion for the development of airway clearance technologies.