Detection of dynamic hyperinflation in spontaneously breathing mechanically ventilated patients
AssigneeSt. Michael's Hospital
InventorsChrister Sinderby, Jennifer Beck, Norman Comtois, Giacomo Grasselli
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Abstract
A method and device for determining dynamic hyperinflation during mechanical ventilation of a spontaneously breathing patient, wherein mechanical ventilation is removed during one breath of the patient, inspiratory and expiratory volumes of the patient are measured during the one breath, and a difference between the inspiratory and expiratory volumes measured during the one breath is calculated. Dynamic hyperinflation of the patient's lungs is indicated in relation to the calculated difference.
Claims19
A method for determining dynamic hyperinflation during mechanical ventilation of a spontaneously breathing patient, comprising:
- removing, using a controller, mechanical ventilation during one breath of the patient;
- measuring inspiratory and expiratory volumes of the patient during said one breath;
- calculating, using a calculator, a difference between the inspiratory and expiratory volumes measured during said one breath, the calculated difference having a value;
- and
- indicating, using an indicator, presence or absence of dynamic hyperinflation of the patient's lungs on the basis of a position of the value of the calculated difference with respect to a first value indicative of presence of dynamic hyperinflation and a second value indicative of absence of dynamic hyperinflation.
A device for determining dynamic hyperinflation during mechanical ventilation of a spontaneously breathing patient, comprising:
- a controller for removing mechanical ventilation during one breath of the patient;
- a sensor of inspiratory and expiratory volumes of the patient during said one breath;
- a calculator of a difference between the inspiratory and expiratory volumes sensed during said one breath, the calculated difference having a value;
- and
- an indicator of presence or absence of dynamic hyperinflation of the patient's lungs on the basis of a position of the value of the calculated difference with respect to a first value indicative of presence of dynamic hyperinflation and a second value indicative of absence of dynamic hyperinflation.
Dependencies are inferred from the claim text.