PAT 20A/B Study Guide - Final Guide: Lung Volumes, Plethysmograph, Intrapleural Pressure
21 Jan 2017
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Document Summary
The amount of air that can be exchanged during ventilation: the tidal volume olume of air inspired ( or exhaled) with each regular breath. Varies with gender, age, exertion, body position: the inspiratory reserve volume. The maximum amount of air that can be inspired in addition to the tidal volume: the expiratory reserve volume. The maximum amount that can be exhaled after expiration of the tidal volume. A portion of the lung volume cannot be exhaled. 1200 ml of air remains in the lungs after forced expiration. The rv increases with ages: b/c there is more trapping of air in the lungs at the end of expiration. Cannot be measured with a spirometer: b/c this air cannot be expressed from the lungs it is measured by indirect methods: helium dilution methods, nitrogen washout methods, body plethysmography. Total amount of air that can be exhaled after maximal inspiration.
