| 摘要 |
The present invention discloses a method for improving control and detection precision of tidal volume by introducing R value, comprising the steps of: a plateau pressure Pplate is used to calculate a system compliance C with C=DeltaV/(Pplate-PEEP); VT, the tidal volume obtained currently at patient terminal, is calculated with VT=DeltaVx(C-Ctube)/C, wherein DeltaV is the variation of tidal volume, PEEP is the positive end expiratory pressure and Ctube is the compliance C of the line. Depending on the calculated VT, the tidal volume which is actually obtained by the patients during this period, the processing unit calculates the tidal volume VT', which the airway is intended to reach during the next expiration period, by VT'=VT+DeltaVTxK wherein K is a scaling factor for control and adjustment, VT is the tidal volume obtained by the patient during the current period, VTset is the presetted tidal volume, DeltaVT=VTset-VT. And the processing unit accordingly controls the opening position of the inspiratory valve during the next inspiration period, so as to achieve the purpose of improving control and detection of precision tidal volume. |
