Physiology 3120 Lecture Notes - Lecture 3: Lung Volumes, Tidal Volume, Spirometer

• School: Western University
• Department: Physiology
• Course: Physiology 3120
• Professor: Tom Stavraky

Document Summary

Modern way is through a computer, there"s a filter where you blow through and the computer takes all sorts of measurements. The old way consists of an upside down bell filled with air hanging in a liquid. Tidal volume: the volume of air inhaled with each breath at rest (around. Minute volume or pulmonary ventilation: volume of air inhaled per minute -> : 500 ml x 12 breaths/minute = 6000 ml, 6 l/min. Vital capacity (vc): volume of air that can be forcibly exhaled after a maximal inspiration. Inspiratory reserve volume (irv): volume of air that can be forcibly inhaled following a normal inspiration (how much more can you force yourself to breathe in when you"ve inhaled normally) -> above tidal volume. Expiratory reserve volume (erv): volume of air that can be forcibly exhaled following a normal exhalation (how much more can you force yourself to exhale when you"ve exhaled normally) -> below tidal volume.