| 摘要 |
A ventilator system comprises a conventional ventilator 1 and a control unit 2 connected with the outlet of the ventilator 10 between the ventilator and a breathing circuit 3. An inspiratory gas path 22 through the control unit connects with the ventilator outlet at one end and at its opposite end with an inspiratory limb 301 of the breathing circuit. An expiratory gas path 34 has its inlet 35 connected with an expiratory limb 302 of the breathing circuit and its outlet 37 opens to atmosphere. An adjustable flow restrictor 31, 41 is provided in the inspiratory path and/or expiratory path and is controlled (via control means 31) by the control unit. In one embodiment the control means receives signals from sensors 32, 33, 39, 40 (e.g. pressure or flow rate sensors) in the gas paths and from a manual flow rate control knob 43 and an expiratory pressure control knob 44; controlling the flow restrictors in response to these signals. |
