Expiratory Reserve Volume

**Definition:** The extra volume of air that can be expired with maximum effort beyond the level reached at the end of a normal, quiet expiration. Common abbreviation is ERV.

**Tree numbers:** - E01.370.386.700.485.750.275.260 - E01.370.386.700.485.750.900.260 - G09.772.850.390.360 - G09.772.850.970.360