Objective To observe the clinic effect of bilevel positive pressureventilator on the chronic pulmonary heart disease.
目的观察双水平正压呼吸机治疗慢性肺源性心脏病的临床疗效。
2
Transformational pressureventilator use is more likely when the change in ventilation, so the dynamic use of respirator dead space to be considered.
使用压力转换型通气机时更易出现通气量的改变，故呼吸机使用的动态无效腔需要考虑。
3
In this part, calculation methods of the productivity, air-cushion pressure, air flow quantity, nozzle area, capacity of ventilator and electric motor are given out systematically.