1、（一）临床症状和体征摘自：人民卫生出版社诊断学第五版。P556通气目标通气目标舒适安全充分氧合不费力血气正常防止并发症参数模式/同步参数管理撤机失败的原因Supine chest radiograph obtained at 1 week of age reveals a ground glass appearance to the lungs.Supine chest radiograph obtained in the same patient at 1 month of age shows the development of small cystic lucencies in the
2、lungs.Supine chest radiograph obtained in the same patient at 2 months of age shows continued development of small cystic lucencies in the lungsModelLungPrmrespiratory musclesresistancecompliancePresPelVVresistance R(kPas/l)compliance C(ml/mbar)elastance E (mbar/ml)pressure (mbar)flow V(l/min)(pneum
3、atical symbols)assistant inspiratory pressureflowvolumeFlow Proportional Assist Ventilation(VPAV)mbar l/smbar mlflow-gainvolume-gainThe ventilator has the property of a resistance:Negative Ventilator Resistance NVRVolume Proportional Assist Ventilation(VPAV)The ventilator has the property of an elas
4、tance:Negative Ventilator Elastance NVE+Integra-tionsafety circuitgainvolumegainflowCPAPventilatorPneumo-tachographpressureflow-signalvolume-signalcontrol inputsensor inputKRKEProportional AssistVentilationhumidifier inside patient circuitV0MAPVoszimpedance tube(high impedance for fosc)stenosis for MAP(high resistance for spont.breathing)humidifierHFOV only in combination with CPAPpistonV0flow of spontaneousbreathingVery littlepressure changedue to spontaneous breathingoscillatory flowHFOV during wholebreathing cycle116 结束语结束语
