Assessment of compliance can be divided into static compliance and dynamic compliance measurements. Explain the relationship and clinical significance of these measurements.
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Static compliance is calculated by dividing the volume by the pressure (i.e., plateau pressure) measured when the flow is momentarily stopped . When airflow is absent, airway resistance becomes a non-factor. static compliance reflects the elastic resistance of the lung and chest wall.
Dynamic compliance is calculated by dividing the volume by the pressure (i.e. peak inspiratory pressure) measured when airflow is present Since airflow is present, airway resistance becomes a factor in the measurement of dynamic compliance. Dynamic compliance therefore reflects the condition of airway resistance (nonelastic resistance) as well as the elastic properties of the lung and chest wall (elastic resistance).
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