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为满足不同病情和呼吸治疗的需要,呼吸器的设计和制作上发展了不同类型的通气方式及其它辅助设施。了解各类通气方式对血流动力学的影响及其作用机制,对正确选择通气方式、维持良好的气体交换、预防和减少并发症起着极为重要的作用。不同通气方式对血流动力学的影响及其作用机制随着呼吸周期、动脉血压、左右心室压力及每搏量(SV)出现周期性的波动。右室SV于吸气期增加,呼气期减少;而左室SV与此相反。这些变化可能是由于自发呼吸的
In order to meet the needs of different conditions and respiratory therapy, different types of ventilation and other auxiliary facilities have been developed in the design and manufacture of respirators. Understanding of various types of ventilation on hemodynamics and its mechanism of action, the correct choice of ventilation, maintain good gas exchange, prevention and reduction of complications plays a very important role. The effect of different ventilation modes on hemodynamics and its mechanism of action fluctuates periodically with respiration cycle, arterial pressure, left and right ventricular pressure and stroke volume (SV). Right ventricular SV increased in the inspiratory phase, expiratory decreased; while the left ventricular SV and the opposite. These changes may be due to spontaneous breathing