What is the abbreviation for residual volume?

The abbreviation for residual volume is RV. Residual volume refers to the amount of air that remains in the lungs after a maximal exhalation. This volume is crucial for understanding lung function because it helps to keep the alveoli open and allows for gas exchange even when the person is not actively breathing.

The other abbreviations represent different lung volumes or ventilation parameters. For instance, ER typically refers to expiratory reserve, VC stands for vital capacity, which is the maximum amount of air a person can exhale after a maximum inhalation, and VCV could be mistakenly interpreted in other contexts without a specific standard reference in respiratory therapy. Hence, RV is the recognized abbreviation directly associated with residual volume in pulmonary function terminology.