Method and apparatus for determining alveolar opening and closing
First Claim
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1. Method for determining the alveolar opening and/or alveolar closing of a lung, comprising the steps of:
- ventilating the lung with an artificial ventilator with inspiratory and expiratory airway pressures,measuring according to a method of electrical impedance tomography an impedance signal in a lung zone, andchanging at least one of the inspiratory and expiratory airway pressures, andgenerating a curve from the measuring step,wherein from an observation of the curve of the measured impedance signal a first respiration pressure value is determined at which alveolar closing in said lung zone occurs and/or a second respiration pressure value is determined at which alveolar opening in said lung zone occurs.
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Abstract
The invention refers to a method for the regional determination of the alveolar opening and alveolar closing of the lung depending on the respiration pressure, wherein according to the method of electrical impedance tomography, an impedance signal is measured in at least one lung zone depending on the respiration pressure. The alveolar opening or closing of a lung zone is determined, in particular to enable an improved artificial respiration.
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Citations
24 Claims
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1. Method for determining the alveolar opening and/or alveolar closing of a lung, comprising the steps of:
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ventilating the lung with an artificial ventilator with inspiratory and expiratory airway pressures, measuring according to a method of electrical impedance tomography an impedance signal in a lung zone, and changing at least one of the inspiratory and expiratory airway pressures, and generating a curve from the measuring step, wherein from an observation of the curve of the measured impedance signal a first respiration pressure value is determined at which alveolar closing in said lung zone occurs and/or a second respiration pressure value is determined at which alveolar opening in said lung zone occurs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification