expiratory resistance


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ex·pi·ra·to·ry re·sis·tance

resistance to flow of gas out of the lungs or the total resistance to flow of gas during the expiratory phase of the respiratory cycle.

expiratory resistance

1. The impedence to airflow from the trachea, bronchi, mouth or nose during exhalation.
2. The use of a restricted orifice, or flow resistor, during positive-pressure ventilation to retard the flow of exhaled gases.
3. An objective measure of bronchospasm.
See also: resistance
References in periodicals archive ?
The expiratory resistance created by the Provent device helps maintain an open airway during sleep and prevents a collapse of the airway.
This was probably due to the fact that resistance was calculated via a modification of von Neergard and Wirz method (at mid-tidal volume by dividing inspiratory transpulmonary pressure by inspiratory flow), and thus measuring the average inspiratory and expiratory resistance, instead of the inspiratory.
As most respiratory professionals realize, auto-PEEP is a function not only of the expiratory resistance, but also of minute ventilation.