Utility of Inspiratory Volume in Incentive Spirometry.

Incentive spirometers (IS) were developed to reproduce sustained maximal inspiration. Most providers believe that achieving target inspiratory volume (ISV) is the most important factor for successful IS use. ISV has been used as a surrogate for deep breathing effort and has been correlated with various clinical outcomes, but the scientific validity of these correlations has yet to be demonstrated. Currently, the greatest utility of targeted ISV may be as a method of monitoring global patient progress and as a psychosocial instrument for patient engagement in care.