| 摘要 |
A method is provided for automatically controlling a ventilation or breathing system with a ventilation unit (7), which is controlled by a control unit (5), in order to deliver an assist pressure preset by the control unit, wherein the current values of the tidal volume flow Flow(t) and those of the volume V(t) are detected in the control unit. The control unit (5) may carry out a proportionally assisting ventilation method (PAV: Proportional Assist Ventilation) by a factor for a degree of compensation (PPSp) being selected by the control unit and by the parameters for the volume assist (VA) and the flow assist (FA) being determined by: <?in-line-formulae description="In-line Formulae" end="lead"?>VA=PPSp.DeltaE <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>FA=PPSp.DeltaR, <?in-line-formulae description="In-line Formulae" end="tail"?> wherein DeltaE is the deviation of a measured or assumed elastance (Emeasured) of the patient from an ideal elastance (Eideal) and DeltaR is the deviation of a measured or assumed resistance (Rmeasured) of the patient from an ideal resistance (Rideal). The assist pressure PS(t)=VA.V(t)+FA.Flow(t) is determined from this by the control unit with the flow delivery device (ventilation unit (7)) being set such as to deliver this assist pressure. |
